CN215108474U - Positive and negative pressure sealing door - Google Patents
Positive and negative pressure sealing door Download PDFInfo
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- CN215108474U CN215108474U CN202120373396.XU CN202120373396U CN215108474U CN 215108474 U CN215108474 U CN 215108474U CN 202120373396 U CN202120373396 U CN 202120373396U CN 215108474 U CN215108474 U CN 215108474U
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Abstract
The utility model provides a positive negative pressure sealing door for guarantee target space's leakproofness, target space has air intake and air outlet, the air intake is equipped with air inlet filter and is connected to the air supply unit of carrying clean air, the air outlet is equipped with the air-out filter and is connected to the exhaust unit, form sealed chamber between target space's indoor side and outdoor side, sealed chamber is equipped with malleation mouth and negative pressure mouth, the malleation mouth communicates to air inlet filter's upper reaches through the malleation rubber tube, the negative pressure mouth communicates to air outlet filter's low reaches through the negative pressure rubber tube. Adopt the utility model provides a positive negative pressure sealing door can guarantee that the target space can both keep sealed under the condition of +500Pa and-500 Pa.
Description
Technical Field
The utility model relates to a door for isolating indoor and outdoor circulation of air, in particular to a sealing door for high-level biological safety laboratory and microbiological laboratory.
Background
In real life, there are many occasions where a sealing door is needed, such as an infection ward of a hospital, a sterile room, and particularly a biosafety laboratory, and the sealing of the door is very important because it is necessary to isolate the indoor and outdoor air circulation of a target space to prevent harmful gas from flowing to the outdoor or air from flowing to the sterile room.
The applicant previously owned patent ZL200610113846.1, which provided an annular seal chamber on the seal door, and introduced positive pressure gas into the seal chamber to maintain the sealing property.
And new requirements for sealing doors in these years are: sealing is possible at both +500Pa and-500 Pa, and the above patents are not fully satisfied.
SUMMERY OF THE UTILITY MODEL
The utility model provides a positive negative pressure sealing door makes it can both seal under +500Pa and-500 Pa's the condition.
In order to achieve the above object, the utility model adopts the following technical scheme:
the utility model provides a positive negative pressure sealing door for guarantee target space's leakproofness, target space have air intake and air outlet, and the air intake is equipped with the air inlet filter and is connected to the air supply unit who carries clean air, and the air outlet is equipped with the air-out filter and is connected to exhaust unit, forms sealed chamber, its characterized in that between target space's indoor side and outdoor side:
the sealing cavity is provided with a positive pressure port and a negative pressure port, the positive pressure port is communicated to the upstream of the air inlet filter through a positive pressure rubber pipe, and the negative pressure port is communicated to the downstream of the air outlet filter through a negative pressure rubber pipe.
The positive negative pressure sealing door, wherein: the seal cavity is an annular seal cavity.
The positive negative pressure sealing door, wherein: the annular sealing cavity is formed by an inner annular sealing rubber strip and an outer annular sealing rubber strip at intervals.
The positive negative pressure sealing door, wherein: and the negative pressure rubber tube is provided with a negative pressure switch valve which is synchronously opened and closed with the exhaust unit.
In order to achieve the above object, the utility model discloses a another technical scheme is:
the utility model provides a positive negative pressure sealing door for guarantee target space's leakproofness, target space have air intake and air outlet, and air intake connection has the air supply unit of carrying clean air, and the air outlet is connected with exhaust unit, forms sealed chamber, its characterized in that between target space's indoor side and outdoor side:
an air pump is arranged at the outdoor side of the sealing cavity, the air pump is provided with an outdoor side air inlet and an outdoor side air outlet, and an air inlet and an air outlet of the air pump are communicated with the sealing cavity; an air pump filter is arranged at the air outlet end of the air pump, so that the air outlet of the air pump is clean fresh air.
The positive negative pressure sealing door, wherein: the seal cavity is an annular seal cavity.
The positive negative pressure sealing door, wherein: the annular sealing cavity is formed by an inner annular sealing rubber strip and an outer annular sealing rubber strip at intervals.
The positive negative pressure sealing door, wherein: the pipe diameter of the outdoor air outlet is smaller than that of the blast pipe.
Adopt the utility model provides a positive negative pressure sealing door can guarantee that the target space can both keep sealed under the condition of +500Pa and-500 Pa.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a second embodiment of the present invention.
Description of reference numerals: a target space 1; a sealed cavity 2; an air inlet 3; an air outlet 4; an air supply unit 5; an exhaust fan unit 6; an exhaust air filter 7; a positive pressure hose 8; a negative pressure rubber tube 9; a negative pressure switch valve 10; an air outlet filter 11; an air pump 12; an air pump filter 13; an intake air filter 14; an outdoor side air inlet a; an outdoor side air outlet b; an air suction pipe c; and a blast pipe d.
Detailed Description
As shown in fig. 1, the utility model provides a positive negative pressure sealing door for guarantee the leakproofness of target space 1 in positions such as door and window, it is annular sealed chamber 2 with sealed glue bar of dicyclo between indoor side and outdoor side (especially between door leaf and the door frame), wherein:
the target space 1 is provided with an air inlet 3 and an air outlet 4, the air inlet 3 is provided with an air inlet filter 14 (high efficiency filter), and is connected with an air supply unit 5 (with an air supply filter) for conveying clean air, the air outlet 4 is provided with an air outlet filter 11 (high efficiency filter), and is connected with an exhaust fan unit 6, and possibly harmful air is safely exhausted through the exhaust fan unit 6 and the exhaust fan filter 7;
the sealing cavity 2 is provided with a positive pressure port and a negative pressure port, the positive pressure port is communicated to the upstream of the air inlet filter 14 through a positive pressure rubber pipe 8, the negative pressure port is communicated to the downstream of the air outlet filter 11 through a negative pressure rubber pipe 9, and the negative pressure rubber pipe 9 is provided with a negative pressure switch valve 10.
The negative pressure switch valve 10 and the exhaust fan unit 6 are synchronously opened and closed.
The utility model discloses an operating condition as follows:
(1) under normal conditions, the positive pressure rubber tube 8 is normally open, the negative pressure switch valve 10 and the exhaust fan set 6 are kept open, clean fresh air sent by the air supply unit 5 is arranged in the sealed cavity 2, redundant fresh air is exhausted by the negative pressure rubber tube 9 and the exhaust fan set 6, and the sealed cavity 2 keeps positive pressure relative to the target space 1 all the time;
if gaps are formed between the sealed cavity 2 and the indoor space and the outdoor space, clean fresh air enters the indoor space and the outdoor space through the gaps, and therefore air entering the indoor space is discharged through the indoor air outlet 4 without obstruction;
(2) when the exhaust fan unit 6 is suddenly stopped and the air supply unit 5 is not stopped, the indoor pressure rises, and possibly dangerous air in the room leaks out from various gaps, including gaps on double-ring sealing rubber strips on a door frame (the natural attenuation (namely, the pressure is smaller than 250Pa through leakage) within 20min when the pressure in the room reaches +500Pa in the national standard' biological safety general requirement for laboratories GB19489-2008, and the natural attenuation is still leaked substantially);
at this moment, because of the piezoresistance function of the air intake filter 14, the pressure of the air flow entering the sealed cavity 2 by the clean fresh air sent by the air blower unit 5 is inevitably higher than the indoor pressure (more than or equal to high-efficiency resistance), so the pressure of the air in the sealed cavity 2 is more than 500Pa, even if gaps exist between the sealed cavity 2 and the indoor and outdoor air, the dangerous air in the indoor air can not be discharged out through the sealed cavity 2, at this moment, the air pressed out to the indoor and outdoor air through the gaps is the clean fresh air sent by the air blower unit 5, and the air is discharged to the outdoor (such as a buffer room and a corridor) without obstruction; if the sealing cavity 2 is seamless with the indoor and outdoor, the pressure in the sealing cavity 2 is always kept more than 500 Pa;
(3) now, it is also specified that the check and acceptance should stop the blower unit 5, pump to-500 Pa, and the pressure rise does not exceed the standard in the specified time. The reason is that negative pressure is easy to suck various seams, and hidden troubles are easier to find than positive pressure. When this test is carried out, it is known that the door is filled with soap liquid, and if an air-out is found, it is necessary to close the door, otherwise, it means no leakage. However, this method cannot be said, and it is said that there is a leak although the outside air is cleaner than the inside of the room, because the outside air is sucked by raising the negative pressure in the room by opening the discharge air without causing a gap or stopping the supply of the air in the room.
The utility model discloses do not adopt and scribble the soap lye method, but make sealed chamber 2 communicate with exhaust unit 6 through negative pressure rubber tube 9, under the condition that exhaust unit 6 is opened, even indoor negative pressure rises to-500 Pa, because the resistance influence of air-out filter 11, the negative pressure of sealed chamber 2 can be more negative than indoor negative pressure, if there is the gap between sealed chamber 2 and indoor, outdoor, indoor, outdoor gas can be inhaled sealed chamber 2, is inhaled exhaust unit 6 again, safely discharges after exhaust filter 7; at this time, the possibly harmful air in the room is not leaked to the outside of the room through the hermetic chamber 2, and the safety regulation is satisfied.
As shown in fig. 2, the present invention provides a positive and negative pressure sealing door for ensuring the sealing performance of the target space 1 at the positions of doors and windows, which is a sealed cavity 2 formed in a ring shape by a double-ring sealing strip between the indoor side and the outdoor side (especially between the door leaf and the door frame), wherein:
an air pump 12 is arranged at the outdoor side of the sealed cavity 2, the air pump 12 is provided with an outdoor air inlet a and an outdoor air outlet b, an air inlet of the air pump 12 is also communicated with the sealed cavity 2 through an air suction pipe c, an air outlet of the air pump 12 is also communicated with the sealed cavity 2 through an air supply pipe d, and an air pump filter 13 is arranged at an air outlet end of the air pump 12 to enable air to be fresh air.
In the above embodiment, the air pump 12 can be disposed at a position close to the sealed chamber 2, for example, at an outdoor position of a door or a window (outside a door panel, outside a door frame, outside a side wall, etc.), so as to shorten the air path and save space.
The working conditions of the utility model (need to combine with the figure 1 and the figure 2) are as follows:
(1) under normal conditions, the sealed cavity 2 is filled with clean fresh air sent by the air pump 12 through the air supply pipe d; if there is no gap between the sealed chamber 2 and the indoor or outdoor, the air enters the air pump 12 through the outdoor air inlet a and then is discharged through the outdoor air outlet b;
if gaps are formed between the sealed cavity 2 and the indoor space and the outdoor space, clean fresh air enters the indoor space and the outdoor space through the gaps, so that no interference exists; at the moment, clean fresh air is supplemented into the sealing ring 2 through the air pump 12 and the air supply pipe d, and the redundant fresh air is discharged from the outdoor air outlet b;
wherein, the pipe diameter of the air outlet at the outdoor side is smaller than that of the blast pipe;
(2) when the exhaust fan set 6 of the target space 1 is suddenly stopped and the air supply unit 5 is not stopped, if no gap exists between the sealed cavity 2 and the indoor space or the outdoor space, the sealed cavity 2 can always keep the pressure more than 500Pa to keep normal operation;
if there is a gap between the sealed chamber 2 and the indoor or outdoor, at this time, as long as the pressure of the clean fresh air sent into the sealed chamber 2 by the air pump 12 through the blast pipe d is higher than 500Pa (adjusting the power of the air pump 12 can be easily implemented), the possibly dangerous air in the indoor can not be discharged through the sealed chamber 2, at this time, the air pressed out to the indoor or outdoor through the gap is the clean fresh air sent by the air pump 12, and the air is discharged to the outdoor (such as a buffer room or a corridor) without hindrance;
(3) if the air supply unit 5 of the target space 1 stops, the indoor pressure is pumped to-500 Pa, the utility model does not need to adopt the method of coating the soap liquid, if no gap exists between the sealing cavity 2 and the indoor space or the outdoor space, the sealing cavity 2 can keep normal work;
if there are gaps between the sealed cavity 2 and the indoor and outdoor, then the sealed cavity 2 forms a negative pressure less than-500 Pa through the suction of the air pump 12 and the suction pipe c (adjusting the power of the air pump 12 can be easily achieved), i.e. the negative pressure of the sealed cavity 2 is more negative than the indoor negative pressure, the indoor and outdoor air is sucked into the sealed cavity 2 through the gap, then sucked into the air pump 12, and discharged safely after passing through the air pump filter 13, thus meeting the safety standard.
The foregoing description is intended to be illustrative rather than limiting, and it will be appreciated by those skilled in the art that many modifications, variations or equivalents may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. The utility model provides a positive negative pressure sealing door for guarantee target space's leakproofness, target space have air intake and air outlet, and the air intake is equipped with the air inlet filter and is connected to the air supply unit who carries clean air, and the air outlet is equipped with the air-out filter and is connected to exhaust unit, forms sealed chamber, its characterized in that between target space's indoor side and outdoor side:
the sealing cavity is provided with a positive pressure port and a negative pressure port, the positive pressure port is communicated to the upstream of the air inlet filter through a positive pressure rubber pipe, and the negative pressure port is communicated to the downstream of the air outlet filter through a negative pressure rubber pipe.
2. The positive and negative pressure sealing door of claim 1, wherein: the seal cavity is an annular seal cavity.
3. The positive and negative pressure sealing door of claim 2, wherein: the annular sealing cavity is formed by an inner annular sealing rubber strip and an outer annular sealing rubber strip at intervals.
4. The positive and negative pressure sealing door of claim 1, wherein: and the negative pressure rubber tube is provided with a negative pressure switch valve which is synchronously opened and closed with the exhaust unit.
5. The utility model provides a positive negative pressure sealing door for guarantee target space's leakproofness, target space have air intake and air outlet, and air intake connection has the air supply unit of carrying clean air, and the air outlet is connected with exhaust unit, forms sealed chamber, its characterized in that between target space's indoor side and outdoor side:
an air pump is arranged at the outdoor side of the sealing cavity, the air pump is provided with an outdoor side air inlet and an outdoor side air outlet, and an air inlet and an air outlet of the air pump are communicated with the sealing cavity; an air pump filter is arranged at the air outlet end of the air pump, so that the air outlet of the air pump is clean fresh air.
6. The positive and negative pressure sealing door of claim 5, wherein: the seal cavity is an annular seal cavity.
7. The positive and negative pressure sealing door of claim 6, wherein: the annular sealing cavity is formed by an inner annular sealing rubber strip and an outer annular sealing rubber strip at intervals.
8. The positive and negative pressure sealing door of claim 6, wherein: the pipe diameter of the outdoor air outlet is smaller than that of the blast pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120373396.XU CN215108474U (en) | 2021-02-10 | 2021-02-10 | Positive and negative pressure sealing door |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120373396.XU CN215108474U (en) | 2021-02-10 | 2021-02-10 | Positive and negative pressure sealing door |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215108474U true CN215108474U (en) | 2021-12-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120373396.XU Active CN215108474U (en) | 2021-02-10 | 2021-02-10 | Positive and negative pressure sealing door |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215108474U (en) |
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2021
- 2021-02-10 CN CN202120373396.XU patent/CN215108474U/en active Active
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