CN220005360U - Ventilated laboratory cabinet - Google Patents
Ventilated laboratory cabinet Download PDFInfo
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- CN220005360U CN220005360U CN202321588680.4U CN202321588680U CN220005360U CN 220005360 U CN220005360 U CN 220005360U CN 202321588680 U CN202321588680 U CN 202321588680U CN 220005360 U CN220005360 U CN 220005360U
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- pressure fan
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- 230000007246 mechanism Effects 0.000 claims abstract description 19
- 238000005192 partition Methods 0.000 claims abstract description 18
- 230000001105 regulatory effect Effects 0.000 claims abstract description 18
- 238000004887 air purification Methods 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 7
- 230000003750 conditioning effect Effects 0.000 claims 1
- 238000002474 experimental method Methods 0.000 description 19
- 231100000331 toxic Toxicity 0.000 description 13
- 230000002588 toxic effect Effects 0.000 description 13
- 239000003814 drug Substances 0.000 description 5
- 239000003153 chemical reaction reagent Substances 0.000 description 3
- 229940079593 drug Drugs 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Devices For Use In Laboratory Experiments (AREA)
Abstract
The ventilated laboratory cabinet comprises a laboratory cabinet body, a power module, a power switch and a frequency converter; the device also comprises an air exhausting mechanism and a power regulating circuit; the negative pressure fan is arranged on the upper end partition plate of the laboratory cabinet body, and the exhaust pipe of the negative pressure fan is connected with the air inlet pipe for air purification; each set of air suction mechanism comprises an air inlet cylinder and a connecting pipe, wherein the front ends of the connecting pipes are transversely provided with a plurality of openings at intervals, and the rear side ends of the air inlet cylinders are respectively arranged at the front ends of the plurality of openings; the front end of the air inlet pipe of the negative pressure fan is provided with a plurality of branch pipes, and the communicating pipe at the rear end of the connecting pipe of the plurality of sets of air draft mechanisms is respectively connected with the front ends of the plurality of branch pipes; the power module is electrically connected with the frequency converter, the power regulating circuit and the power switch in the element box. The utility model discloses can carry out effective harmful gas pump drainage to mesa and baffle, and can select on the power efficiency assurance relevant regional harmful gas in time discharge basis of negative pressure fan as required, still realized energy-conserving purpose relatively.
Description
Technical Field
The utility model relates to the technical field of laboratory equipment, in particular to a ventilated laboratory cabinet.
Background
In schools, factories, environmental protection departments, scientific research institutions and the like, a laboratory workbench (also called a laboratory cabinet) is an important device, mainly provides a platform for experimental operation and has the functions of placing test tools, test reagents, medicines and the like. The prior laboratory cabinet general structure comprises a cabinet body and baffle plates, wherein a plurality of baffle plates are arranged at the upper end of the cabinet body and used for placing various reagents and medicines, the negative pressure fan is positioned at the upper top of the cabinet body, negative pressure is generated during working to operate staff on the laboratory cabinet table surface, and harmful air released by various medicaments and the like is pumped out and discharged outdoors (or discharged outdoors after being treated by an air purifier), so that adverse effects of the toxic and harmful air on the staff are reduced.
Along with the development of industrial technology, laboratory cabinet technology has also advanced to a certain extent, for example, patent number 201520918085.1 in China and patent name of the patent entitled "ventilation experiment workbench", the content of which is recorded in that a jack in the vertical direction is arranged on a table body of the utility model, a support is connected in the jack in a sliding manner, the top end of the support is provided with a ventilating hood, the ventilating hood is communicated with an induced draft fan, and an adjusting piece for adjusting the sliding position of the support in the jack is further arranged on the table body. When some experiments without dangers are performed, the bracket can be lifted to be far away from the workbench surface, so that the operation of experimenters can be facilitated; when some dangerous experiments are carried out, the bracket can be lifted to the working table surface, so that the exhaust hood covers the working table surface, and further, the dangerous situations are prevented. Therefore, the experiment workbench has the effect of convenient operation and also has the effect of high safety. The above-mentioned patent has the advantages, but is limited by the structure, and there is still a need for improvement. The method comprises the following steps: the exhaust hood can only pump out harmful gas in a fixed vertical area, so when an experiment workbench (laboratory cabinet) is provided with a plurality of layers of partition boards, the air circulation performance is poor due to the blocking of the plurality of partition boards, and the harmful gas released by various medicaments on the workbench surface and the partition boards cannot be effectively pumped out, so that the physical health of an experimenter can be adversely affected. And two,: the power of the motor matched with the exhaust hood is not adjustable, that is, no matter how much or how little harmful gas is generated on the working table in the experiment, the motor works under the maximum power (the power of the motor is generally designed according to the maximum amount of the harmful gas pumped out), so when the amount of the harmful gas generated on the table or the partition board is relatively small, the fan works under the mode of larger power for a longer time, and unnecessary electric energy waste can be brought.
Disclosure of Invention
In order to overcome the defects that the prior experiment workbench (laboratory cabinet) is limited by a structure, the negative pressure fan is relatively limited in exhaust of harmful gas and relatively consumes energy, the utility model provides the ventilated laboratory cabinet based on the experiment cabinet body, which can effectively exhaust the harmful gas on a table top and a partition board through the negative pressure fan and select the power of the negative pressure fan according to the amount of the exhaust harmful gas when working under the combined action of related mechanisms in application, thereby effectively ensuring the timely exhaust of the harmful gas in related areas and relatively realizing energy-saving purpose.
The technical scheme adopted for solving the technical problems is as follows:
the ventilated laboratory cabinet comprises a laboratory cabinet body, a power module, a power switch and a frequency converter; the device is characterized by also comprising an air exhausting mechanism and a power regulating circuit; the negative pressure fan is arranged on the upper end partition plate of the laboratory cabinet body, the air inlet pipe of the negative pressure fan is positioned at the lower part of the upper end partition plate, and the exhaust pipe of the negative pressure fan is connected with the air inlet pipe for air purification; the air draft mechanism comprises a plurality of sets, each set of air draft mechanism comprises an air inlet cylinder and a connecting pipe, both ends of the connecting pipe are of closed structures, the front ends of the connecting pipes are transversely provided with a plurality of openings at a certain interval, and the rear side ends of the air inlet cylinders are respectively arranged at the front ends of the plurality of openings; the front end of the air inlet pipe of the negative pressure fan is provided with a plurality of branch pipes, and the communicating pipe at the rear end of the connecting pipe of the plurality of sets of air draft mechanisms is respectively connected with the front ends of the plurality of branch pipes; the power module, the frequency converter, the power regulating circuit and the power switch are arranged in the body element box; the power output ends of the power switches are electrically connected with the power input ends of the multi-path power regulating circuit; the power output end of the multipath power regulating circuit is electrically connected with the signal input end of the frequency converter, and the power input end of the negative pressure fan is electrically connected with the power output end of the frequency converter.
Further, the front side end of the air inlet barrel is provided with a sealing plate, and a plurality of air inlet holes are distributed in the sealing plate.
Further, the lower end of the air inlet pipe of the negative pressure fan is of a closed structure.
Further, each power regulating circuit comprises two resistors connected through wires, and one ends of the two resistors are connected.
The utility model has the beneficial effects that: this novel experiment cabinet body-based has all functions of ordinary experiment cabinet. In application, under the combined action of related mechanisms, during operation, the table top and the partition plate can be pumped and exhausted through the negative pressure fan, and experimenters can open power adjusting circuits with different paths according to requirements to select the power of the negative pressure fan, so that the energy-saving purpose is relatively realized on the basis of effectively ensuring the timely exhaust of the harmful gas in the related areas. Based on the above, the utility model has good application prospect.
Drawings
The utility model will be further described with reference to the drawings and examples.
Fig. 1 is a schematic diagram of the overall structure of the present utility model.
Fig. 2 is a circuit diagram of the present utility model.
Detailed Description
The ventilation type laboratory cabinet is shown in fig. 1 and 2, and comprises a laboratory cabinet body 3 with a cabinet body 1, a negative pressure fan M, a partition board 2, other necessary matched tools and the like, a power supply module U1, a power supply switch and a frequency converter U2; the device is also provided with an air exhausting mechanism and a power regulating circuit 4; the negative pressure fan M is arranged on the middle part of the upper end baffle plate 2 of the laboratory cabinet body 3 through a screw nut, an air inlet pipe of the negative pressure fan M is positioned on the middle part of the lower end of the upper end baffle plate 2, an air outlet pipe 5 of the negative pressure fan M is connected with an air inlet pipe of an air purifier (not shown in the figure, the working principle of the negative pressure fan M is not repeated in the prior art), and the air outlet pipe of the air purifier is connected with an indoor exhaust pipe (the outer end of the air purifier is positioned outdoors and not shown in the figure) through a pipe joint; the air draft mechanism has three sets, each set of air draft mechanism comprises an air inlet cylinder 61 and a connecting pipe 62, two ends of the connecting pipe 62 are of closed structures, the front end of the connecting pipe 62 is transversely provided with four open holes at a certain interval, and branch pipes at the rear side ends of the four air inlet cylinders 61 are respectively longitudinally welded at the front outer side ends of the four open holes; the lower end of an air inlet pipe 51 of the negative pressure fan M is positioned in the middle of the rear end of the table top of the laboratory cabinet body 3, three branch pipes A communicated with the inside of the air inlet pipe are welded at a certain distance from top to bottom at the front end of the air inlet pipe 51, and a communicating pipe (communicated with the inside of a connecting pipe) in the middle of the rear end of a connecting pipe 62 of the three sets of air suction mechanisms is respectively welded with the front ends of the three branch pipes A; the three sets of air draft mechanisms 6 are respectively and transversely positioned at the lower ends of the three partition boards 2 and are respectively positioned at the front side of the rear supporting plate 31 of the laboratory cabinet body; the power module U1, the frequency converter U2, the power regulating circuit 4 and the power switch (the handles of the three power switches are positioned outside three openings at the front end of the element box) are arranged in the element box 7 at the upper part of the front right side end of the laboratory cabinet body.
As shown in fig. 1 and 2, the front end of the air inlet barrel is provided with a sealing plate 611, and a plurality of air inlet holes are distributed on the sealing plate 611. The lower end of the air inlet pipe of the negative pressure fan M is of a closed structure. Each power regulating circuit comprises two resistors R1 and R2 (or R3, R4, R5 and R6) which are connected through wiring of a circuit board, and one ends of the two resistors R1 and R2 (or R3, R4, R5 and R6) are connected. The power input ends 1 and 2 pins of the power module U1 are respectively connected with two poles of an alternating current 220V power supply through wires. The power output end 3 pin of the power module U1 is connected with the power input ends of the three power switches S1, S2 and S3 through wires, and the power output ends of the three power switches S1, S2 and S3 are respectively connected with the other end of the resistor R1 and the other end of the resistor R2, the other end of the resistor R3 and the other end of the resistor R4, and the other ends of the resistor R5 and the other ends of the resistor R6 through wires, wherein the other pin of the power module U1 and the 4 pin of the power module U1 are connected with the power input end of the three power regulating circuits through wires. The other ends of the power output end resistors R1, R3 and R5 of the three-way power regulating circuit are connected with the pin 4 of the signal input end of the frequency converter U2 through wires, the power input end of the negative pressure fan M is connected with the pin U, V, W of the power output end of the frequency converter U2 through wires, and the power input end R, S, T pin of the frequency converter U2 is connected with an alternating current 380V power supply through wires.
As shown in fig. 1 and 2, the novel experiment cabinet body has all functions of an ordinary experiment cabinet, provides a platform for experiment operation, has the functions of placing experiment tools, experiment reagents, medicines and the like, generates negative pressure after the negative pressure fan M is electrified to pump out toxic and harmful gas generated by the experiment, and is subjected to treatment by an air purification processor (toxic and harmful air enters the air inlet cylinder 61 through the holes of the sealing plate 611) to be harmlessly discharged into outdoor atmosphere (because three sets of air suction mechanisms are respectively provided with four air inlet cylinders 51, the operation area of the four air inlet cylinders 51 is relatively large, the table surface and the toxic and harmful gas pumped out of flowing through the partition plate can be effectively pumped out of the room, and the partition plate is prevented from blocking the toxic and harmful gas, so that the negative pressure fan cannot effectively pump out the toxic and harmful gas). In the utility model, after 220V alternating current power enters the power input end of the power module U1, the 3 and 4 pins of the power module U1 output stable direct current 12V power and enter the power input ends of the power switches S1, S2 and S3.
In the novel device, a worker can select the power of the negative pressure fan M according to the amount of toxic and harmful gas to be pumped and exhausted according to specific requirements, and when the amount of toxic and harmful gas generated by experiments is large, the negative pressure fan M is selected to work in a high power mode to meet the requirement of gas pumping and exhausting; specifically, the power switch S1 is turned on, so that the 12V power supply is divided by the resistors R1 and R2 and enters the signal input end 4 pin of the frequency converter U2 to be in the highest voltage signal mode (for example, 5V), so that the frequency converter U2 outputs the highest frequency power supply to enter the power input end of the negative pressure fan M under the function of the frequency converter U2, the negative pressure fan M is powered to work in the highest power mode, and a large amount of toxic and harmful gas generated on the table top and the partition plate can be timely discharged. When the amount of toxic and harmful gas generated by the experiment is large, the negative pressure fan M is selected to work in a high power mode, so that the gas pumping and exhausting can be met; specifically, the power switch S2 is turned on (S1 is turned off), so that the 12V power supply is divided by the resistors R3 and R4 and enters the signal input end 4 pin of the frequency converter U2 to be in a higher voltage signal mode (such as 4V), the frequency converter U2 outputs a relatively higher frequency power supply to enter the power input end of the negative pressure fan M under the function of the frequency converter U2, the negative pressure fan M is powered to work in a higher power mode, and the energy saving purpose can be achieved on the basis of timely discharging a large amount of toxic and harmful gas generated on the table surface and the partition plate. When the amount of toxic and harmful gas generated by the experiment is smaller, the negative pressure fan M is selected to work in a lower power mode, so that the gas pumping and exhausting can be met; specifically, the power switch S3 is turned on (S2 and S1 are turned off), so that the 12V power supply is divided by the resistors R5 and R6 and enters the signal input end 4 pin of the frequency converter U2 to be in a lower voltage signal mode (for example, 3V), the frequency converter U2 outputs the power input end which enters the negative pressure fan M with the lowest frequency relatively under the function of the frequency converter U2, the negative pressure fan M is powered to work in the lowest power mode, and the energy saving purpose can be achieved on the basis of timely discharging a small amount of toxic and harmful gas generated on the table top and the partition board.
Fig. 1 and 2 show, through the above, the utility model discloses during operation, can carry out effective harmful gas pump drainage to mesa and baffle through negative pressure fan, and the power that the power regulating circuit of different road numbers was selected negative pressure fan can be opened as required to the experimenter, by so, effectively guarantee on the timely discharge basis of relevant regional harmful gas, still realized energy-conserving purpose relatively. In fig. 2, the resistances of the resistors R1, R2, R3, R4, R5, and R6 are 5.6K, 4K, 8K, 4K, 9K, and 3K, respectively; the power supply module U1 is a finished product of a switching power supply module from alternating current 220V to direct current 12V; the frequency converter U2 is a Shenzhen-to-three-phase frequency converter, and when the signal input end of the frequency converter is input with direct current power supply signals with different sizes, the power supply output end can output voltage signals which dynamically change (the frequency converter is the prior art, and the working principle of the frequency converter is not repeated in the utility model).
The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the above-described embodiments, and that the above-described embodiments and descriptions are merely illustrative of the principles of the present utility model, and that various changes and modifications may be made therein without departing from the spirit and scope of the utility model, which is defined by the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (4)
1. The ventilated laboratory cabinet comprises a laboratory cabinet body, a power module, a power switch, a frequency converter and a negative pressure fan; the power supply is characterized by also comprising an air draft mechanism and a power regulating circuit, wherein a plurality of power switches are arranged, and the power regulating circuit is provided with a plurality of paths; the negative pressure fan is arranged on the upper end partition plate of the laboratory cabinet body, the air inlet pipe of the negative pressure fan is positioned at the lower part of the upper end partition plate, and the exhaust pipe of the negative pressure fan is connected with the air inlet pipe for air purification; the air draft mechanism comprises a plurality of sets, each set of air draft mechanism comprises an air inlet cylinder and a connecting pipe, both ends of the connecting pipe are of closed structures, the front ends of the connecting pipes are transversely provided with a plurality of openings at a certain interval, and the rear side ends of the air inlet cylinders are respectively arranged at the front ends of the plurality of openings; the front end of the air inlet pipe of the negative pressure fan is provided with a plurality of branch pipes, and the communicating pipe at the rear end of the connecting pipe of the plurality of sets of air draft mechanisms is respectively connected with the front ends of the plurality of branch pipes; the power module, the frequency converter, the power regulating circuit and the power switch are arranged in the body element box; the power output ends of the power switches are electrically connected with the power input ends of the multi-path power regulating circuit; the power output end of the multipath power regulating circuit is electrically connected with the signal input end of the frequency converter, and the power input end of the negative pressure fan is electrically connected with the power output end of the frequency converter.
2. The ventilated laboratory cabinet of claim 1, wherein a front end of the air inlet duct is provided with a sealing plate, and a plurality of air inlet holes are distributed in the sealing plate.
3. The ventilated laboratory cabinet of claim 1, wherein a lower end of the air inlet duct of the negative pressure fan is of a closed type structure.
4. The ventilated laboratory cabinet of claim 1, wherein each power conditioning circuit comprises two resistors connected by a wire, the two resistors being connected at one end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321588680.4U CN220005360U (en) | 2023-06-21 | 2023-06-21 | Ventilated laboratory cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321588680.4U CN220005360U (en) | 2023-06-21 | 2023-06-21 | Ventilated laboratory cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220005360U true CN220005360U (en) | 2023-11-14 |
Family
ID=88677549
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321588680.4U Active CN220005360U (en) | 2023-06-21 | 2023-06-21 | Ventilated laboratory cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220005360U (en) |
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2023
- 2023-06-21 CN CN202321588680.4U patent/CN220005360U/en active Active
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