CN218544714U - Dual-purpose work clean bench of positive negative pressure - Google Patents
Dual-purpose work clean bench of positive negative pressure Download PDFInfo
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- CN218544714U CN218544714U CN202221735985.9U CN202221735985U CN218544714U CN 218544714 U CN218544714 U CN 218544714U CN 202221735985 U CN202221735985 U CN 202221735985U CN 218544714 U CN218544714 U CN 218544714U
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Abstract
The utility model provides a positive and negative pressure dual-purpose working clean bench, which comprises a machine body, wherein a clean area is arranged in the middle of the machine body, a filtering area is arranged above the clean area, an air supply filter is arranged in the filtering area, the air supply filter is arranged between the filtering area and the clean area at intervals, the air inlet end of the air supply filter is communicated with the filtering area, and the air outlet end of the air supply filter is communicated with the inner cavity of the clean area; an air inlet and an air outlet are arranged at the top of the filtering area side by side, and a fan is arranged between the air inlet and the air supply filter; the top of filtering area still slides and is provided with the slide, and the area of slide is greater than the area of air intake and air exit, and the slide is sealed sheltering from in the top of air intake or air exit slidably. The utility model discloses a removal of slide can become the negative pressure and press the self-loopa, plays simple and easy biological safety cabinet effect, has protected inside sample promptly, protects operating personnel's safety again.
Description
Technical Field
The utility model relates to an air purification equipment technical field especially relates to a dual-purpose work clean bench of positive negative pressure.
Background
The working clean bench is a box-type air purification device which can provide local operation environment with local dustless clean and sterile working environment, and can be widely applied to the fields of laboratories, electronic technology, aerospace, precision instruments, fine chemistry industry, bio-pharmaceuticals, bio-medical treatment, pharmacy, foods and the like.
In the electronic industry, in order to ensure high cleanness in a local area and avoid the invasion of outside polluted air, the inside is often in a positive pressure state. Also, the biomedical industry also requires that the interior region be at a positive pressure in order to maintain sterility. However, in the purification area of the biomedical industry, microorganisms and harmful substances may be manipulated, which may affect outside personnel. It is also very essential that the sub-atmospheric clean bench protects personnel and the environment.
The existing working clean bench can only realize one working state, namely a positive pressure state or a negative pressure state, so that two different working tables are required to be configured if two working states are required simultaneously, on one hand, the equipment cost is improved, and on the other hand, the occupied space is increased.
SUMMERY OF THE UTILITY MODEL
To the problem, the utility model provides a dual-purpose work clean bench of positive negative pressure.
In order to achieve the above purpose, the utility model adopts the following technical proposal:
a positive and negative pressure dual-purpose working clean bench comprises a machine body, wherein a clean area is arranged in the middle of the machine body, a filtering area is arranged above the clean area, an air supply filter is arranged in the filtering area, the air supply filter is arranged between the filtering area and the clean area at intervals, an air inlet end of the air supply filter is communicated with the filtering area, and an air outlet end of the air supply filter is communicated with an inner cavity of the clean area; an air inlet and an air outlet are arranged at the top of the filtering area side by side, and a fan is arranged between the air inlet and the air supply filter; the top of filtering area still slides and is provided with the slide, the area of slide is greater than the air intake and the area of air exit, slide slidable ground is sealed to be sheltered from the air intake or the top of air exit.
Preferably, the left lower side of the machine body is provided with a front window, air outlets are respectively arranged on two sides of the lower bottom surface of the clean area, and the air outlet positioned on the left side is adjacent to the front window.
Preferably, the bottom, the rear side and the left and right sides of the clean area are provided with communicated air outlet channels, the air outlet channels are communicated with the air outlet, and the upper ends of the air outlet channels are communicated with the filtering area.
Preferably, an exhaust filter is further arranged below the exhaust outlet.
Preferably, the exhaust filter is a one-way exhaust filter, and the air outlet direction of the exhaust filter is opposite to the air outlet.
Preferably, the length and width of the air supply filter correspond to the length and width of the top surface of the clean area, and the air outlet end of the air supply filter is embedded on the top surface of the clean area.
Compared with the prior art, the beneficial effects of the utility model are that: the interior of the clean bench can be randomly changed into a positive pressure state or a negative pressure state according to needs by arranging the air inlet, the air outlet and the sliding plate, so that the dual-purpose of one machine is realized, namely, the interior of the clean bench can be switched into an ideal positive pressure or negative pressure working state according to the needs of work and internal articles, the equipment cost is saved, and the occupied space of the equipment is also saved; in addition, under the condition that toxic and harmful gases are discharged from the front window under a positive pressure state and harm the health of operators, the sliding plate is timely slid to seal the air inlet, the air outlet is opened to switch the interior of the clean bench into a negative pressure state, so that self circulation in the clean bench is realized, and the function of a simple safety cabinet is played, so that the high cleanliness or the sterile state in the clean bench can be maintained, internal samples are effectively protected, redundant gases can be continuously discharged through the upper air outlet, and the air quantity in the clean bench is kept in a constant state, so that the continuous and stable work of the clean bench is realized, and the internal pressure imbalance of the clean bench caused by unsmooth exhaust is avoided; simultaneously, set up exhaust filter in air exit department, can filter the back and discharge from air exit exhaust wind, prevent that inside polluted gas from outwards diffusing, effectively protect operating personnel safety.
Drawings
Fig. 1 is a schematic side view of the positive pressure working state of the dual-purpose positive/negative pressure workbench of the present invention.
Fig. 2 is a schematic front view of the positive pressure working state of the positive and negative pressure dual-purpose clean bench of the present invention.
Fig. 3 is a schematic side view of the negative pressure working state of the dual-purpose workbench for positive and negative pressure of the present invention.
Fig. 4 is a schematic front view of the negative pressure working state of the positive and negative pressure dual-purpose workbench of the present invention.
Detailed Description
In order to further understand the objects, structures, features, and functions of the present invention, the following embodiments are described in detail.
Please refer to fig. 1, fig. 2, fig. 3 and fig. 4 (arrows in each figure indicate the flow direction of air), the utility model discloses a positive and negative pressure dual-purpose workbench, which comprises a machine body 1, a clean area 2 is arranged in the middle of the machine body 1, a filter area 3 is arranged above the clean area 2, an air supply filter 4 is arranged in the filter area 3, the air supply filter 4 is arranged between the filter area 3 and the clean area 2 at intervals, the air inlet end of the air supply filter 4 is communicated with the filter area 3, and the air outlet end of the air supply filter 4 is communicated with the inner cavity of the clean area 2; the top of the filtering area 3 is provided with an air inlet 5 and an air outlet 6 in parallel, and a fan 7 is arranged between the air inlet 5 and the air supply filter 4; the top of filtering area 3 still slides and is provided with slide 8, and the area of slide 8 is greater than the area of air intake 5 and air exit 6, and slide 8 slidable seals to shelter from in the top of air intake 5 or air exit 6.
In an embodiment, clean district 2 is the work area of clean bench promptly, and filtering area 3 sets up in clean district 2's top for draw the new trend from organism 1 outward, thereby utilize air supply filter 4 to filter the new trend and provide clean wind and blow in clean district 2, realize the malleation environment in the clean district 2. Slide 8 and air exit 6's setting, be used for in clean district 2 interior operation be microorganism and harmful substance, can cause the potential safety hazard to external personnel, utilize slide 8 to carry out the shutoff with air intake 5, make air exit 6 open, at this moment, utilize fan 7 last operation, can introduce and go into air outlet 11 from the anterior front window 10 that is used for the operation of organism 1 with the air current of outside, rethread air-out passageway 12 all around enters into filtering area 3, wherein a part air current is through air exit 6 discharges, inside another part blows to air supply filter 4 and enters into clean district 2 through fan 7, realize the inside self-loopa of clean district 2. Under this operation, just with the inside positive pressure state that originally switches into negative pressure state (self-loopa) of clean bench, both kept inside high cleanliness or sterile condition, can discharge unnecessary gas through air exit 6 again, keep 2 inside amount of wind invariable in clean district to make its pressure invariable, avoid 2 internal pressure imbalances in clean district to lead to inside material to damage.
Preferably, an exhaust filter 9 is further disposed below the exhaust outlet 6, and the exhaust filter 9 is disposed to filter the air flow before the air flow is exhausted from the exhaust outlet 6 in a negative pressure state, so as to ensure that the air exhausted from the machine body 1 is clean air, and prevent the internal polluted air from diffusing outwards and polluting the external environment.
Furthermore, the exhaust filter 9 is a one-way exhaust filter 9, and the air outlet direction of the one-way exhaust filter 9 is opposite to the air outlet 6. The unidirectional air exhaust filter 9 only unidirectionally exhausts air to the air exhaust port 6, but does not intake air from the air exhaust port 6, and can exhaust air from the air exhaust port 6 to the filtering area 3 when the air exhaust port 6 is opened (namely, when the clean bench is switched to a negative pressure state), so that the air exhaust from the air exhaust port 6 to the filtering area 3 when the fan 7 operates, and the inside of the filtering area 3 can be kept in the negative pressure state.
Preferably, a front window 10 is arranged on the left lower side of the machine body 1, air outlets 11 are respectively arranged on two sides of the lower bottom surface of the clean area 2, and the air outlet 11 located on the left side is adjacent to the front window 10.
Preferably, the bottom, the rear side and the left and right sides of the clean area 2 are provided with an air outlet channel 12, the air outlet channel 12 is communicated with an air outlet 11, and the upper end of the air outlet channel 12 is communicated with the filter area 3.
As shown in fig. 1 and 2, the front window 10 is disposed at the left lower side of the machine body 1, and can ensure that the approaching gas filtered by the blowing filter 4 from the top of the clean area 2 can flow through the whole space of the clean area 2, and finally be discharged from the bottom of the clean area 2, so that the clean area 2 is kept clean. Because 2 tops in clean area continue inwards to blow in the new trend, for keeping 2 internal pressure in clean area invariable, the wind in the clean area 2 can be continuously outwards discharged through front window 10 to keep internal pressure stable, the production operation of being convenient for. Meanwhile, the air outlet 11 is arranged for enabling part of the air which is thrown out by the fan 7 outwards and is not filtered to pass through the air outlet channel 12, and finally the air is discharged out of the machine body 1 from the air outlet 11 close to the front window 10, so that the clean area 2 is prevented from being polluted. This represents the flow trajectory of the wind in the positive pressure state.
It should be noted that although both the two air outlets 11 are communicated with the clean area 2, and the air outlet channel 12 below the air outlet 11 is also communicated, in the positive pressure state, the air with larger air volume blown out from the upper side of the clean area 2 causes the air velocity of the air going out from the air outlet 11 on the right side and the air going out from the front window 10 to be larger, and only a small amount of air passes through the air outlet channel 12, the air volume is small, and the air velocity is full, and under the larger air pressure on the upper side, the air in the air outlet channel 12 cannot enter the clean area 2 from the air outlet 11 on the right side, and will flow to the air outlet 11 on the left side along the air outlet channel 12 together with the air exhausted from the air outlet 11 on the right side, and is exhausted out of the machine body 1 along the air flow of the front window 10.
As shown in fig. 3 and 4, when toxic and harmful substances are placed in the clean area 2, in order to prevent the toxic and harmful substances from diffusing harmful gases to the outside and endangering the health of operators, the gas flow in the clean area 2 needs to be prevented from directly flowing out. Therefore, the sliding plate 8 is directly slid to block the air inlet 5, and the air outlet 6 is opened, so that the interior of the clean bench enters a negative pressure state, and the air in the clean area 2 is enabled to realize self circulation. The specific working process comprises the following steps: fan 7 lasts the rotation, but air intake 5 closes, and this moment under the effect of fan 7 suction, the wind in the clean area 2 is directly inhaled in air-out passageway 12 through the air outlet 11 of both sides in, and can not outwards spill over. Meanwhile, because the interior of the machine body 1 is in a negative pressure state, air can be sucked into the air outlet channel 12 from the front window 10 and flows to the filtering area 3 at the upper part through the air outlet channel 12, then a part of air is discharged outwards through the exhaust filter and the air outlet 6, and the other part of air is supplied to the air supply filter 4 through the fan 7 and is filtered by the air supply filter 4 to self-circulate the interior. Therefore, the high cleanness or the sterile state of the interior is maintained, and the redundant air volume is discharged outwards after being filtered by the exhaust filter, so that the internal polluted gas is prevented from diffusing outwards, and the interior is always kept in a negative pressure state.
It should be pointed out that, when in the negative pressure state, the air is sucked upwards by the fan 7, the flow direction of the air flows downwards from the clean area 2, then the air flows upwards into the air exhaust channel, and then enters into the clean area 2 from the air outlet end of the air supply filter 4, the clean area 2 gets down a large amount of air, the air speed is large, the air can enter into the air exhaust channel at the bottom from the air outlets 11 at the two sides, meanwhile, due to the suction force of the fan 7, the air direction in the air exhaust channel is upwards along the air outlet channel 12, therefore, the air sucked in from the front window 10 can also directly enter into the air outlet channel 12 at the bottom through the left air outlet 11 adjacent to the air outlet channel 12 at the bottom, and the air is converged with the air blown out from the clean area 2 and upwards reaches the filtering area 3 along the air outlet channel 12, and the filtering cycle is performed.
Preferably, the length and width of the air supply filter 4 correspond to the length and width of the top surface of the clean area 2, and the air outlet end of the air supply filter 4 is embedded on the top surface of the clean area 2. The size of the blast filter 4 is limited, so that the blast filter has a larger filtering area and a faster air volume processing speed, and simultaneously, the blowing area entering the clean area 2 can be large and uniform.
From the above, the positive and negative pressure dual-purpose workbench of the utility model can be arbitrarily switched to a positive pressure state or a negative pressure state as required by arranging the air inlet, the air outlet and the sliding plate, so that the workbench can be used as a dual-purpose machine, namely, the workbench can be switched to an ideal positive pressure or negative pressure working state as required by work and internal articles, thereby saving the equipment cost and the occupied space of the equipment; in addition, under the condition that toxic and harmful gas is discharged from the front window under a positive pressure state and harms the health of operators, the sliding plate is timely slid to seal the air inlet, the air outlet is opened to switch the interior of the clean bench into a negative pressure state, and self circulation in the clean bench is realized, so that high cleanliness or a sterile state in the clean bench can be kept, redundant gas can be continuously discharged through the upper air outlet, and the air quantity in the clean bench is kept in a constant state, so that continuous and stable work of the clean bench is realized, and the internal pressure imbalance of the clean bench caused by unsmooth exhaust is avoided; meanwhile, the exhaust filter is arranged at the air outlet, so that the air exhausted from the air outlet can be filtered and then exhausted, and the internal polluted gas is prevented from being diffused outwards.
The present invention has been described in relation to the above embodiments, which are only examples for implementing the present invention. It should be noted that the disclosed embodiments do not limit the scope of the invention. On the contrary, all changes and modifications which do not depart from the spirit and scope of the present invention are deemed to fall within the scope of the present invention.
Claims (6)
1. The utility model provides a dual-purpose work clean bench of positive negative pressure, includes the organism, the organism middle part sets up clean district, its characterized in that: a filtering area is arranged above the clean area, an air supply filter is arranged in the filtering area, the air supply filter is arranged between the filtering area and the clean area at intervals, an air inlet end of the air supply filter is communicated with the filtering area, and an air outlet end of the air supply filter is communicated with an inner cavity of the clean area; an air inlet and an air outlet are arranged at the top of the filtering area side by side, and a fan is arranged between the air inlet and the air supply filter; the top of filtering area still slides and is provided with the slide, the area of slide is greater than the air intake and the area of air exit, slide slidable ground is sealed to be sheltered from the air intake or the top of air exit.
2. The positive and negative pressure dual-purpose work clean bench of claim 1, wherein: the left lower side of the machine body is provided with a front window, air outlets are respectively arranged on two sides of the lower bottom surface of the clean area, and the air outlets located on the left side are adjacent to the front window.
3. The positive and negative pressure dual-purpose work clean bench of claim 2, wherein: the bottom, the rear side and the left and right sides of the clean area are provided with air outlet channels which are communicated, the air outlet channels are communicated with the air outlet, and the upper ends of the air outlet channels are communicated with the filtering area.
4. The positive and negative pressure dual-purpose work clean bench of claim 1, wherein: an exhaust filter is arranged below the exhaust outlet.
5. The positive and negative pressure dual-purpose work clean bench of claim 4, wherein: the air exhaust filter is a one-way air exhaust filter, and the air outlet direction of the air exhaust filter is opposite to the air outlet.
6. The positive and negative pressure dual-purpose work clean bench of claim 1, wherein: the length and width of the air supply filter correspond to the length and width of the top surface of the clean area, and the air outlet end of the air supply filter is embedded on the top surface of the clean area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221735985.9U CN218544714U (en) | 2022-07-07 | 2022-07-07 | Dual-purpose work clean bench of positive negative pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221735985.9U CN218544714U (en) | 2022-07-07 | 2022-07-07 | Dual-purpose work clean bench of positive negative pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218544714U true CN218544714U (en) | 2023-02-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221735985.9U Active CN218544714U (en) | 2022-07-07 | 2022-07-07 | Dual-purpose work clean bench of positive negative pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218544714U (en) |
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2022
- 2022-07-07 CN CN202221735985.9U patent/CN218544714U/en active Active
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