Ventilation cabinet with micro-power air supplement function

Abstract

A workbench is arranged between a cabinet body and a bottom cabinet, an operation opening corresponding to the workbench is formed in the front side of the cabinet body, a window is installed on the upper portion of the operation opening in a sliding mode, an air supplementing box is installed on the lower portion of the operation opening, and the air supplementing box comprises an air supplementing plate facing the workbench and side surrounding plates arranged at the two ends of the air supplementing plate. A plurality of circular air outlet holes are formed in the air supplementing plate, and a plurality of right-angle air outlet holes are jointly formed in the joint of the air supplementing plate and the side surrounding plate; air is blown to the back plate of the cabinet body through the circular air outlet holes, air is blown to the connecting position of the workbench and the side plate of the cabinet body through the right-angle air outlet holes, and the air is blown to a boundary layer generated at the connecting position, so that the phenomena of further reverse flow and polluted air escape are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to a ventilation cabinet technical field especially a ventilation cabinet of micro power air supplement function. BACKGROUND

[0002] Ventilation equipment is the equipment that exhausts waste gas, harmful gas and particulate matter etc. in a working space to the outside (usually outdoor) of the working space, and the equipment has very wide application in industry and life, such as the plant that generates toxic and harmful or particulate matter gas, the biochemical laboratory that emits pollutants, the kitchen that generates oil fume etc. Ventilation cabinet is the important equipment of controlling pollutants in the laboratory, and it can successfully exhaust the pollutants emitted in the cabinet to the outdoor, avoids escaping from the operating port of the ventilation cabinet to the indoor, and endangers the health and safety of experimental personnel.

[0003] When the ventilation cabinet is running, the boundary layer is formed at the place where the two side plates of the ventilation cabinet contact the table top, and the air flow rate is reduced due to the hindering effect of the boundary layer, when the air outside the ventilation cabinet window flows forward, due to the slow air flow rate in the boundary layer, the backflow or even the escape of the contaminated air can be caused near the side plate. In addition, the negative pressure distribution in the ventilation cabinet is not completely uniform, due to the complexity of air flow, the local pressure change can be caused near the two side plates. When the main flow air flows forward, the local low pressure area can be formed near the side plate, so that the surrounding air can supplement to the low pressure area, thereby the backflow phenomenon is caused. SUMMARY

[0004] The technical problem to be solved by the utility model lies in that the existing ventilation cabinet can cause the backflow or even the escape of the contaminated air near the side plate of the cabinet body when running.

[0005] In order to solve the above problems, the utility model provides a ventilation cabinet with micro power air supplement function, the cabinet body is provided with a workbench between the cabinet body and the bottom cabinet, the front side of the cabinet body is formed with an operating port corresponding to the workbench, the upper part of the operating port is slidably installed with a window, and the lower part is installed with an air supplement box, the air supplement box comprises an air supplement plate facing the workbench and side enclosing plates arranged at both ends of the air supplement plate, a plurality of circular air outlet holes are formed in the air supplement plate, and a plurality of right-angled air outlet holes are formed at the connecting part of the air supplement plate and the side enclosing plates.

[0006] The ventilation cabinet with micro power air supplement function also has the following technical features.

[0007] The right-angled air outlet hole comprises a side groove one and a side groove two, the side groove one is formed from the end of the air supplement plate to the center, the side groove two is formed from the end of the side enclosing plate to the center, and when the air supplement plate and the side enclosing plate are connected to form the air supplement box, the side groove one and the side groove two are communicated to form the right-angled air outlet hole.

[0008] The front side of the bottom cabinet is provided with a air supply box, the front side of the air supply box is formed with an air supply port, and the rear side is provided with a fan; the air supply box further comprises a bottom surrounding plate, and the bottom surrounding plate is provided with an air inlet corresponding to the air supply port.

[0009] The bottom surrounding plate and the air supply box are provided with a silica gel sealing gasket for sealing communication between the air supply port and the air inlet.

[0010] The air supply box further comprises a rear surrounding plate, the rear surrounding plate is correspondingly connected with the bottom surrounding plate, the air supply plate and the two side surrounding plates, and forms an air cavity in the air supply box.

[0011] The air cavity is provided with a flow uniformizing plate, the flow uniformizing plate is located between the air inlet and the circular air outlet, and a plurality of flow uniformizing holes are formed in the flow uniformizing plate.

[0012] The utility model has the advantages that the circular air outlet blows air to the back plate of the cabinet, and the right-angle air outlet blows air to the connection between the workbench and the side plate of the cabinet, so that the boundary layer generated by the blowing air to the connection is avoided to further generate backflow and air escape phenomenon. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the axonometric view of the utility model;

[0014] Figure 2 It is the axonometric view of the air supply box from the first perspective;

[0015] Figure 3 It is the axonometric view of the air supply box from the second perspective; Figure 2 It is the enlarged view of A in the middle;

[0016] Figure 4 It is the axonometric view of the air supply box from the second perspective;

[0017] Figure 5 It is the sectional view along the plane B; Figure 4

[0018] Figure 6 It is the axonometric view of the bottom cabinet. DETAILED DESCRIPTION

[0019] The utility model will be described in detail below with reference to the drawings and in combination with the embodiments. It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0020] For example, Figures 1 to 6 ​As shown, the utility model discloses a fume hood with micro-power air supplementing function, a workbench 13 is arranged between a cabinet body 11 and a bottom cabinet 12, a front side of the cabinet body 11 is formed with an operation opening 14 corresponding to the workbench 13, a window 15 is slidably installed at an upper portion of the operation opening 14, and an air supplementing box 21 is installed at a lower portion of the operation opening 14, the air supplementing box 21 comprises an air supplementing plate 22 facing the workbench 13 and side enclosing plates 23 arranged at both ends of the air supplementing plate 22, a plurality of circular air outlet holes 24 are formed in the air supplementing plate 22, and a plurality of right-angled air outlet holes 25 are formed at the connecting positions of the air supplementing plate 22 and the side enclosing plates 23.

[0021] Air is blown to the back plate of the cabinet body 11 through the circular air outlet holes 24, and air is blown to the connecting positions of the workbench 13 and the side plates of the cabinet body 11 through the right-angled air outlet holes 25, so that the boundary layer generated at the connecting positions is blown, and the phenomenon of backflow and escape of contaminated air is avoided.

[0022] The cabinet body 11 comprises the window 15 at the front side, a top plate at the top, side plates at the two sides and a back plate at the back, and due to the problems of air flow rate and pressure, a boundary layer is generated at the connecting positions of the side plates and the workbench 13 in the cabinet body 11, further backflow is generated, and even contaminated air escapes, in addition, air backflow is caused by personnel movement and shielding near the window 15 of the fume hood, therefore, air is blown to the connecting positions of the workbench 13 and the side plates of the cabinet body 11 through the right-angled air outlet holes 25, the boundary layer generated at the connecting positions is blown, and the phenomenon of backflow and escape of contaminated air is effectively solved.

[0023] The side enclosing plates 23 are provided with inner pressure nuts, the side enclosing plates 23 and the air supplementing box 21 can be installed on the cabinet body 11 by cooperation of the inner pressure nuts and screws.

[0024] Preferably, as shown in Figure 2 , Figure 3 , the right-angled air outlet holes 25 comprise a first edge groove 251 and a second edge groove 252, the first edge groove 251 is formed from an end of the air supplementing plate 22 to the center, the second edge groove 252 is formed from an end of the side enclosing plate 23 to the center, and the first edge groove 251 and the second edge groove 252 are communicated to form the right-angled air outlet holes 25 when the air supplementing plate 22 and the side enclosing plate 23 are connected to form the air supplementing box 21.

[0025] Air in the air supplementing box 21 is obliquely blown out from the right-angled air outlet holes 25 formed by the first edge groove 251 and the second edge groove 252, that is, the boundary layer generated at the connecting positions of the workbench 13 and the side plates of the cabinet body 11 is blown.

[0026] Preferably, as shown in Figure 1 , Figure 6 , a supply air box 26 is installed at the front side of the bottom cabinet 12, a supply air opening 27 is formed at the front side of the supply air box 26, and a fan 28 is installed at the rear side of the supply air box 26; as shown in Figure 2 , Figure 5The air supply box 21 further comprises a bottom surrounding plate 29, and the bottom surrounding plate 29 is provided with an air inlet 30 corresponding to the air outlet 27.

[0027] The fan 28 supplies air into the air supply box 26, and the air is supplied into the air supply box 21 through the air outlet 27 and the air inlet 30.

[0028] The fan 28 is driven to rotate by a small motor, and is provided with corresponding power supply, controller and other components to control start and stop and operation power.

[0029] Preferably, referring to Figure 1 The bottom surrounding plate 29 and the air supply box 26 are provided with a silica gel sealing pad 31 to seal and communicate the air outlet 27 and the air inlet 30.

[0030] Preferably, referring to Figure 5 The air supply box 21 further comprises a rear surrounding plate 32, and the rear surrounding plate 32 is connected with the bottom surrounding plate 29, the air supply plate 22 and the two side surrounding plates 23 to form an air cavity 33 in the air supply box 21.

[0031] Preferably, referring to Figure 4 、 Figure 5 The air cavity 33 is provided with a flow equalizing plate 34, and the flow equalizing plate 34 is located between the air inlet 30 and the circular air outlet hole 24, and the flow equalizing plate 34 is provided with a plurality of flow equalizing holes 35.

[0032] The flow equalizing plate 34 can be provided with one or more, and the specific shape can be selected, and the size, shape and spacing of the flow equalizing holes 35 can also be selected to make the air uniform, so that the air is finally blown out from the circular air outlet hole 24 and the right angle air outlet hole 25. Preferably, the number of the flow equalizing plate 34 is 2, the flow equalizing holes 35 on the first flow equalizing plate 34 are circular holes, and the flow equalizing holes 35 on the second flow equalizing plate 34 are long strip-shaped holes, as shown by the dotted arrows in Figure 5 The air enters the air supply box 21 from the air inlet 30, passes through the circular flow equalizing holes 35 on the first flow equalizing plate 34 and the long strip-shaped flow equalizing holes 35 on the second flow equalizing plate 34 in sequence, and is finally blown out from the circular air outlet hole 24 and the right angle air outlet hole 25, so that the air gradually becomes uniform and adapts to the size of the air supply plate 22.

[0033] The working principle of the utility model is as follows:

[0034] In the process of using the ventilation cabinet, the fan 28 supplies air into the air supply box 26, and the air is supplied into the air supply box 21 through the air outlet 27 and the air inlet 30, the circular air outlet hole 24 on the air supply plate 22 blows air to the back plate of the cabinet 11, and the right angle air outlet hole 25 blows air to the connection between the workbench 13 and the side plate of the cabinet 11, and the boundary layer generated by blowing to the connection avoids further reverse flow and air pollution escape phenomenon.

[0035] Finally, it should be noted that the above examples are intended to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can still be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A fume hood with a micro-power air makeup function, characterized in that, The cabinet body (11) and the bottom cabinet (12) are provided with a workbench (13), the front side of the cabinet body (11) is formed with an operation opening (14) corresponding to the workbench (13), the upper part of the operation opening (14) is slidably provided with a window (15), and the lower part is provided with a air supplement box (21); the air supplement box (21) comprises an air supplement plate (22) facing the workbench (13) and side enclosing plates (23) arranged at both ends of the air supplement plate (22); a plurality of circular air outlet holes (24) are formed in the air supplement plate (22); and a plurality of right-angled air outlet holes (25) are formed at the connecting positions of the air supplement plate (22) and the side enclosing plates (23).

2. The micro-kinetic air makeup function fume hood of claim 1, wherein, The right-angled air outlet hole (25) comprises an edge slot one (251) and an edge slot two (252); the edge slot one (251) is formed from the end of the air supplement plate (22) to the center, the edge slot two (252) is formed from the end of the side enclosing plate (23) to the center, and when the air supplement plate (22) and the side enclosing plate (23) are connected to form the air supplement box (21), the edge slot one (251) and the edge slot two (252) are communicated to form the right-angled air outlet hole (25).

3. The micro-kinetic air makeup function fume hood of claim 1, wherein, The front side of the bottom cabinet (12) is provided with a air supply box (26), the front side of the air supply box (26) is formed with an air supply opening (27), and the rear side is provided with a fan (28); the air supplement box (21) further comprises a bottom enclosing plate (29), and the bottom enclosing plate (29) is provided with an air inlet (30) corresponding to the air supply opening (27).

4. The fume hood of claim 3, wherein, The bottom enclosing plate (29) and the air supply box (26) are provided with a silica gel sealing gasket (31) for sealingly communicating the air supply opening (27) and the air inlet (30).

5. The micro-kinetic air makeup function fume hood of claim 3, wherein, The air supplement box (21) further comprises a rear enclosing plate (32), the rear enclosing plate (32) is correspondingly connected with the bottom enclosing plate (29), the air supplement plate (22) and the two side enclosing plates (23) and forms an air cavity (33) in the air supplement box (21).

6. The micro-kinetic air makeup function fume hood of claim 5, wherein, The air cavity (33) is provided with a flow equalizing plate (34), the flow equalizing plate (34) is located between the air inlet (30) and the circular air outlet hole (24), and a plurality of flow equalizing holes (35) are formed in the flow equalizing plate (34).

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