CN214638977U - Laboratory fume chamber with air curtain - Google Patents
Laboratory fume chamber with air curtain Download PDFInfo
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- CN214638977U CN214638977U CN202022037922.3U CN202022037922U CN214638977U CN 214638977 U CN214638977 U CN 214638977U CN 202022037922 U CN202022037922 U CN 202022037922U CN 214638977 U CN214638977 U CN 214638977U
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Abstract
The utility model discloses a laboratory ventilation hood with an air curtain, which comprises a cabinet body, a base, an air curtain structure, a dust suction device and/or a gas purification device, wherein the dust suction device comprises a dust collector and a suction head, and the suction head is arranged at the upper part of the cabinet body; the air purification device is arranged above the air outlet at the top of the cabinet body and comprises a fan box and a filter box; the air curtain structure includes air supply arrangement, and air supply arrangement includes fan and blast pipe, and air supply arrangement's fan and blast pipe are arranged in the base of workstation platen below, and the front end of workstation platen includes the open-ended bar hole that makes progress of transverse arrangement, and the blast pipe is connected with the air outlet of fan, and the air-out of blast pipe forms the air curtain through the upwards blowout in the bar hole of workstation platen. The utility model discloses dust extraction's suction head and gas purification device's inlet scoop all are on cabinet body upper portion, and the air outlet of air curtain is at the front end of cabinet body lower extreme workstation, and the air current of air curtain can not become invalid because of the short circuit.
Description
[ technical field ]
The utility model relates to a laboratory paraphernalia especially relates to a laboratory fume chamber with air curtain.
[ background art ]
The most important is the exhaust function among the function of fume chamber, in chemistry or medicine laboratory, can produce harmful gas, dust and easily fire, explosive, corrosive substance during experimental operation, for protection user's safety, prevent that the polluting substances in the experiment from to the laboratory diffusion, will use the fume chamber near the pollution source, consider to improve experimental environment, the experiment of going on the laboratory bench shifts gradually in the fume chamber.
Patent No. CN201520667986.8 discloses a clean air supplement ventilation cabinet, wherein the ventilation cabinet includes a cabinet body, the cabinet body includes an operation chamber disposed in the middle and a circulating device for gas exchange with the outside, the circulating device is disposed above the operation chamber and is communicated with the operation chamber; the circulating device comprises an exhaust outlet for exhausting waste gas outside, an air supply port for injecting fresh air into the room, an air filter for purifying the supply air and an air curtain structure for preventing harmful gas from escaping. The air curtain structure of the utility model is vertically arranged above the door of the operation room, when the door of the operation room is opened, the air of the air curtain structure is vertically sprayed downwards, and an air curtain is formed at the door of the operation room; however, the circulating device is also arranged above the operating chamber, and the air of the air curtain structure is easy to form a short circuit with an air suction port of the circulating device, so that the air curtain is ineffective; in addition, the circulating device directly discharges the discharged gas without treatment, and environmental pollution is generated.
[ summary of the invention ]
The to-be-solved technical problem of the utility model is to provide a laboratory fume chamber that air curtain is difficult for becoming invalid.
In order to solve the technical problem, the utility model adopts the technical scheme that the laboratory ventilation cabinet with the air curtain comprises a cabinet body, a base, an air curtain structure, a dust suction device and/or a gas purification device, wherein the cabinet body comprises a cabinet top, a front panel, a back panel, a workbench panel and side panels, the dust suction device comprises a dust collector, a suction head and a pipeline, and the suction head is connected with the dust collector through the pipeline; the suction head is arranged at the upper part of the cabinet body; the air purification device is arranged above the air outlet at the top of the cabinet body and comprises a fan box and a filter box; the air curtain structure includes air supply arrangement, and air supply arrangement includes fan and blast pipe, and air supply arrangement's fan and blast pipe are arranged in the base of workstation platen below, and the front end of workstation platen includes the open-ended bar hole that makes progress of transverse arrangement, and the blast pipe is connected with the air outlet of fan, and the air-out of blast pipe forms the air curtain through the upwards blowout in the bar hole of workstation platen.
In the laboratory ventilation cabinet, the upper part of the base comprises the cabinet, and the workbench board is located above the cabinet; the cabinet comprises a front beam, a front plate, a bottom plate, a rear plate and two side plates; the fan is fixed on a side plate of the cabinet, and the side plate of the cabinet comprises an air inlet of the fan; the front beam of the cabinet is a hollow beam, the top surface of the front beam comprises a strip-shaped air nozzle protruding upwards, and the back of the front beam comprises an air inlet; one end of the air outlet of the blast pipe is connected with an air inlet at the back of the front cross beam; the strip-shaped air nozzle on the top surface of the front beam is inserted into the strip-shaped hole at the front end of the workbench bedplate.
In the laboratory fume hood, the number of the air nozzles and the number of the strip-shaped holes are two, and the number of the air supply devices is two; the two air nozzles, the two strip-shaped holes and the two sets of air supply devices are symmetrically arranged on two sides of the central axis of the cabinet respectively.
Above laboratory fume chamber, workstation platen periphery include the convex bead that makes progress, the bar hole is arranged in the rear of workstation platen front end bead.
In the laboratory fume hood, the filter box of the gas purification device is filled with a filtering and adsorbing material; the filter box is arranged above the air outlet at the top of the cabinet body, the fan box is arranged above the filter box, and the air outlet of the fan box is a clean air outlet.
The laboratory ventilation cabinet comprises a box body, a centrifugal fan, a fan bracket and a wind scooper with a small upper part and a big lower part, wherein the lower end of the wind scooper is covered on a filter box, and the upper end of the wind scooper is connected with an air inlet of the centrifugal fan; the fan support is arranged at the top of the box body, and the upper end of the centrifugal fan is fixed on the fan support.
The utility model discloses dust extraction's suction head and gas purification device's inlet scoop all are on cabinet body upper portion, and the air outlet of air curtain is at the front end of cabinet body lower extreme workstation, and the air current of air curtain can not become invalid because of the short circuit.
[ description of the drawings ]
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a front view of the laboratory fume hood according to the embodiment of the present invention.
Fig. 2 is a top view of the laboratory fume hood of the embodiment of the present invention.
Fig. 3 is a right side view of the laboratory fume hood of the embodiment of the present invention.
Fig. 4 is a perspective view of the laboratory fume hood according to the embodiment of the present invention.
Fig. 5 is a sectional view taken along line a in fig. 1.
Fig. 6 is a sectional view taken along line B in fig. 1.
Fig. 7 is a cross-sectional view taken along line D in fig. 6.
Fig. 8 is a cross-sectional view taken along line C in fig. 1.
Figure 9 is a cross-sectional view of a suction head according to an embodiment of the present invention.
Fig. 10 is a partially enlarged view of the portion i in fig. 4.
Fig. 11 is a schematic view illustrating the flow direction of the air curtain structure and the air curtain according to the embodiment of the present invention.
Fig. 12 is a schematic view showing the flow direction of the air flow of the dust suction device according to the embodiment of the present invention.
[ detailed description of the invention ]
The utility model discloses laboratory fume chamber's structure is as shown in fig. 1 to 12, including the cabinet body 10, base 20, gaseous purifier 60, dust extraction and air curtain structure.
The cabinet body 10 comprises a cabinet top 11, a front panel, a back panel 12, a vertical partition 14, a workbench panel 13 and two side panels 15.
The vertical partition plate 14 is arranged in the cabinet body 10, the upper end of the vertical partition plate is connected with the cabinet top 11, the lower end of the vertical partition plate is connected with the rear end of the workbench bedplate 13, and the left end and the right end of the vertical partition plate are respectively connected with the two side plates 15 of the cabinet body 10.
The front panel includes two transparent panels 16 arranged in an up-down manner, and both ends of the upper portion of the panel 16 are respectively provided with a hinge shaft 161. The front end of the side panel 15 of the cabinet 10 includes two support plates 151 arranged up and down, a hinge hole is formed in the front of the support plate 151, an opening is formed in the upper portion of the hinge hole, and a hinge shaft 161 of the panel 16 is supported by the hinge hole of the support plate 151. The lower panel 16A has two hand holes 162 for experimental operations.
The base 20 comprises a cabinet 20A and 4 supporting legs 21, the cabinet 20A is positioned at the upper part of the base 20, and the lower ends of the supporting legs 21 are provided with casters. The table board 13 is located above the cabinet 20A. The cabinet 20A includes a front beam 22, a front plate, a bottom plate, a rear plate, and two side plates 23.
The dust suction device comprises a dust collector 31, a suction head 40, a transverse pipe 32, a vertical pipe 33, a two-position three-way electromagnetic valve 34 and a dust suction hose connector 35.
The suction head 40 comprises an air inlet cover 41 and a guide cone 42, wherein the air inlet cover 41 is in an inverted cone shape, the longitudinal section of the guide cone 42 is in a diamond shape, and the guide cone comprises an upper cone 42A and a lower cone which are coaxial. The guide cone 42 is fixed below the inlet shroud 41 by a plurality of connecting plates 43, and the diameter of the inlet shroud 41 is larger than that of the guide cone 42. The bottom surface of the upper cone 42A of the guide cone 42 is higher than the lower end surface of the air inlet cover 41, and the taper angle of the air inlet cover 41 is the same as that of the upper cone of the guide cone 42 and is 120 degrees. The gap between the air inlet cover 41 and the upper cone 42A of the guide cone 42 is an air suction duct.
The suction head 40 is arranged in the cabinet 10 and is positioned at the upper part of the inner cavity of the cabinet 10 and close to the cabinet top 11. The two-position three-way solenoid valve 34 and the cleaner 31 are disposed in the cabinet 20A. The outlet of the two-position three-way solenoid valve 34 is connected with the dust collector 31, the first inlet of the two-position three-way solenoid valve 34 is connected with the suction head 40 through a pipeline, the second inlet of the two-position three-way solenoid valve 34 is connected with the dust collection hose connector 35, and the dust collection hose connector is arranged on the side plate 23 of the cabinet 20A.
The transverse pipe 32 passes through a through hole at the upper part of the vertical partition 14 and is fixed on the vertical partition 14 through a flange 36, a suction head 40 is arranged at the front end of the transverse pipe 32 through an elbow 37, and an air inlet hood 41 and a guide cone 42 face downwards. The rear end of the cross tube 32 is connected by an elbow 38 to a riser tube 33 disposed between the vertical partition 14 and the back panel 12 of the cabinet 10. The lower end of the standpipe 33 is connected to a first inlet of a two-position three-way solenoid valve 34 via a hose 39.
The air curtain structure comprises two sets of air supply devices which are symmetrically arranged on two sides of the cabinet 20A according to the central axis of the laboratory ventilation cabinet. Each set of air supply device comprises an axial flow fan 51 and an air supply elbow 52. The axial flow fan 51 is fixed on the side plate 23 of the cabinet 20A, and an air inlet 53 of the axial flow fan 51 is arranged on the side plate 23 of the cabinet 20A.
The front beam 22 of the cabinet 20A is a hollow square steel, the top surface of the front beam 22 has two strip-shaped air nozzles 221 protruding upwards, and the rear surface of the front beam 22 has an air inlet 222. One end of the air supply elbow 52 is connected with an air outlet of the axial flow fan 51, and the other end is connected with an air inlet 222 on the rear of the front cross beam 22.
The periphery of the working table 13 is provided with a convex rib 131 protruding upwards, the front end of the working table 13 is provided with two strip-shaped holes 132, and the strip-shaped holes 132 are positioned behind the convex rib 131 at the front edge of the working table 13. The strip-shaped air nozzle 221 on the top surface of the front beam 22 is inserted into the strip-shaped hole 132 of the workbench bedplate 13 from the lower part of the workbench bedplate 13.
The two strip-shaped holes 132 and the two strip-shaped air nozzles 221 are symmetrically arranged in a separated manner according to the central axis of the laboratory fume hood.
The gas purification device 60 is installed in the cabinet top 11 and includes a fan box 60A and a filter box 60B, and the filter box 60B contains a filter adsorbent material 61. The filter box 60B is disposed above the air outlet at the top of the cabinet 10, and the air inlet at the lower end of the filter box 60B is an inlet for the polluted gas. The fan box 60A is arranged above the filter box 60B, the two can be separated, the filtering and adsorbing material 61 is convenient to replace, and an air outlet at the top of the fan box 60A is a clean air outlet.
The fan box 60A comprises a box body 62, a centrifugal fan 63, a fan bracket 64 and a wind guide cover 65 with a small upper part and a large lower part, the lower end of the wind guide cover 65 is covered on the air outlet at the upper end of the filter box 60B, and the upper end of the wind guide cover 65 is connected with the air inlet of the centrifugal fan 63. The fan bracket 64 is installed on the top of the box 62, and the upper end of the centrifugal fan is fixed on the fan bracket 64.
The utility model discloses above embodiment dust extraction adopts to be connected with the dust catcher, and back taper 120 suction head can produce under the condition of dust in the experiment, opens the dust catcher, carries the negative pressure to the suction head, through the direction of direction awl, and the suction scope of suction head can cover the inner chamber of the whole cabinet body, prevents that the interior dust gathering of cabinet from influencing the experimenter operation to scatter on workstation mesa and the experimental apparatus.
After the experiment with dust is completed, an operator can communicate the dust collection hose interface on the side plate of the machine cabinet with the dust collector through the two-position three-way electromagnetic valve, communicate the negative pressure of the dust collector to the dust collection hose interface, and connect the common suction head with the hose with the dust collection hose interface. After an operator takes off the front panel hung on the side plate of the cabinet body, the fallen dust at each part in the cabinet can be cleaned by using a common suction head.
The utility model discloses the laboratory fume chamber of above embodiment no matter can produce under the condition of harmful gas or dust can all normally work.
Under the condition that can produce harmful gas, open the axial fan of air curtain structure and gas purification device's centrifugal fan simultaneously, axial fan's blowing power and centrifugal fan's suction produce the push-pull effect, can form the air curtain at the front end of the cabinet body, the rear of front panel, prevent harmful gas escape outward, harmful gas in the cabinet body then purifies the back through gas purification device's filter cartridge and discharges.
Under the condition that can produce harmful dust, then open the axial fan and the dust catcher of air curtain structure simultaneously, axial fan's blowing power and the suction of suction head produce the push-pull effect, can form the air curtain at the front end of the cabinet body, the rear of front panel, prevent the dust escape outward, the dust in the cabinet body is then through the suction head suction dust catcher in, clean gas is discharged outside the cabinet after filtering in the dust catcher again.
Claims (6)
1. A laboratory ventilation cabinet with an air curtain comprises a cabinet body, a base and an air curtain structure, wherein the cabinet body comprises a cabinet top, a front panel, a back panel, a workbench bedplate and side panels; the suction head is arranged at the upper part of the cabinet body; the air purification device is arranged above the air outlet at the top of the cabinet body and comprises a fan box and a filter box; the air curtain structure includes air supply arrangement, and air supply arrangement includes fan and blast pipe, and air supply arrangement's fan and blast pipe are arranged in the base of workstation platen below, and the front end of workstation platen includes the open-ended bar hole that makes progress of transverse arrangement, and the blast pipe is connected with the air outlet of fan, and the air-out of blast pipe forms the air curtain through the upwards blowout in the bar hole of workstation platen.
2. The laboratory fume hood according to claim 1 wherein the upper portion of the base includes a cabinet above which the table platen sits; the cabinet comprises a front beam, a front plate, a bottom plate, a rear plate and two side plates; the fan is fixed on a side plate of the cabinet, and the side plate of the cabinet comprises an air inlet of the fan; the front beam of the cabinet is a hollow beam, the top surface of the front beam comprises a strip-shaped air nozzle protruding upwards, and the back of the front beam comprises an air inlet; one end of the air outlet of the blast pipe is connected with an air inlet at the back of the front cross beam; the strip-shaped air nozzle on the top surface of the front beam is inserted into the strip-shaped hole at the front end of the workbench bedplate.
3. The laboratory fume hood according to claim 2, wherein the number of the air nozzles and the strip-shaped holes is two, and the number of the air supply devices is two; the two air nozzles, the two strip-shaped holes and the two sets of air supply devices are symmetrically arranged on two sides of the central axis of the cabinet respectively.
4. The laboratory fume hood according to claim 1 wherein the periphery of the table top includes an upwardly projecting rib, the slotted hole being disposed behind the rib at the front end of the table top.
5. The laboratory fume hood according to claim 1 wherein the gas cleaning unit filter box contains a filter adsorbent material; the filter box is arranged above the air outlet at the top of the cabinet body, the fan box is arranged above the filter box, and the air outlet of the fan box is a clean air outlet.
6. The laboratory fume hood according to claim 5, wherein the fan box comprises a box body, a centrifugal fan, a fan bracket and a wind scooper with a small upper part and a big lower part, wherein the lower end of the wind scooper is covered on the filter box, and the upper end of the wind scooper is connected with an air inlet of the centrifugal fan; the fan support is arranged at the top of the box body, and the upper end of the centrifugal fan is fixed on the fan support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022037922.3U CN214638977U (en) | 2020-09-16 | 2020-09-16 | Laboratory fume chamber with air curtain |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022037922.3U CN214638977U (en) | 2020-09-16 | 2020-09-16 | Laboratory fume chamber with air curtain |
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| Publication Number | Publication Date |
|---|---|
| CN214638977U true CN214638977U (en) | 2021-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022037922.3U Active CN214638977U (en) | 2020-09-16 | 2020-09-16 | Laboratory fume chamber with air curtain |
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| CN (1) | CN214638977U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114878749A (en) * | 2022-05-09 | 2022-08-09 | 南京理工大学北方研究院 | Alkene thing purity detection device for pharmaceutical chemicals |
-
2020
- 2020-09-16 CN CN202022037922.3U patent/CN214638977U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114878749A (en) * | 2022-05-09 | 2022-08-09 | 南京理工大学北方研究院 | Alkene thing purity detection device for pharmaceutical chemicals |
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