CN201505655U - Device capable of preventing pernicious gas from leaking - Google Patents
Device capable of preventing pernicious gas from leaking Download PDFInfo
- Publication number
- CN201505655U CN201505655U CN2009201701766U CN200920170176U CN201505655U CN 201505655 U CN201505655 U CN 201505655U CN 2009201701766 U CN2009201701766 U CN 2009201701766U CN 200920170176 U CN200920170176 U CN 200920170176U CN 201505655 U CN201505655 U CN 201505655U
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- cabinet
- air
- cabinet door
- hollow
- pernicious gas
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Abstract
The utility model provides a device capable of preventing pernicious gas from leaking, which comprises a cabinet body and a hollow cabinet door, wherein an accommodating space is formed in the cabinet body, openings communicated with the accommodating space are formed on the front side and the upper part of the accommodating space respectively, the hollow cabinet door can be combined to the two sides of the opening on the front side of the cabinet body in a sliding way so as to control the opening of the opening on the front side, a horizontal blower at the upper end of the hollow cabinet door can be utilized to form an air curtain on the opening of the front side of the cabinet body, and an air supply mechanism is arranged on the opening at the upper part of the cabinet body for the air outside the cabinet body to flow into the accommodating space, thereby preventing effectively the pernicious gas in the cabinet body from leaking and enhancing the removal efficiency of pernicious gas when the air suction groove at the bottom part of the cabinet sucks blow-down airflow from the hollow cabinet door and the pernicious gas from the cabinet body.
Description
Technical field
The relevant a kind of device that prevents that pernicious gas from revealing of the utility model, especially refer to a kind ofly utilize hollow cabinet door and form an air curtain in the cabinet front openings, and one air supply mechanism is set in the cabinet upper end open, leak outside with the pernicious gas in effective obstruct cabinet, and promote the device that prevents the pernicious gas leakage of the eliminating efficient of pernicious gas.
Background technology
The air suction mode of tradition exhaust gas cabinet utilizes an air-extractor, by the exhaust gas cabinet top gas in the cabinet is discharged, as shown in Figure 1 and Figure 2, the cabinet a1 of above-mentioned exhaust gas cabinet top is provided with an air exhauster a2 or air draft conduit, in order to the air gas in the cabinet a1 is discharged cabinet a1.Establish in the place ahead of described cabinet a1, there is an opening a3 and can adjust the sliding door a4 of described opening a3 size, and inherent its rear of described cabinet is provided with a plate washer a5, described plate washer has a plurality of perforate a6, in order to change the direction of pumping airflow, and when sliding door a4 opens, make the intake velocity at air intake vent place distribute comparatively even.
Above-mentioned exhaust gas cabinet before use, must open the power supply of air exhauster a6 earlier with the action of bleeding, and described sliding door a4 opened a little, the outer pocket of cabinet a1 can be flowed in the cabinet a1 by the sliding door opening a3 that a4 opened, to prevent pulling a4 under the situation of closing fully, because of causing the motor idle running of air exhauster without any tonifying Qi mechanism in the cabinet a1 even burning.When in personnel need stretch out one's hand cabinet a1, operating, sliding door a4 must be opened into one suitably highly, to carry out chemistry experiment operating.The preferable modified form exhaust gas cabinet of barrier propterty more is provided with various improved devices or uses different operation skills to improve contaminant trapping efficient, for example go into the threshold place designing airfoil structure of air to open mouth, above the cabinet door or the threshold place exhaust slit is set nature to be provided or to force tonifying Qi, can change the rear dividing plate, VAV (variable air volume) at inclination angle or the like with the variation of cabinet door aperture.
From the above mentioned, existing exhaust gas cabinet is constituted with the principle of fireplace structure, by the thermal natural convection buoyancy of chimney and the swabbing effect of high-altitude lateral airflow bad air is discharged.Modern exhaust gas cabinet then uses air exhauster to carry out forced exhaust to replace the natural exhaust of chimney, and the gas in the cabinet is taken out of, again a baffle plate with hole slot is placed the rear, and changing inspiratory direction a little, but basic framework does not then have too big variation.
Exhaust gas cabinet is when operation, and sliding door is normally at the state of opening, and the harmful substance in the cabinet has the doubt of leakage, so the applicant carries out the diagnosis of laser smog flow field visualization method to exhaust gas cabinet under the opened state of pulling.Found that, described existing exhaust gas cabinet because of not with hydromechanical viewpoint as the design starting point, therefore air-flow has tangible Three-dimensional Flow kenel in cabinet, cause a big recirculating zone in the sliding door inboard, separate the turbulent reflux bulb that forms and near threshold and the side column of sliding door opening, also have because of fluid boundary layer.The chance that disorderly air-flow and recirculating zone can cause the pollutant in the cabinet to diffuse to easily outside the cabinet greatly improves.If before the exhaust gas cabinet opening, put a dummy model, then also there is big reflux bulb to form, this reflux bulb even extend in the cabinet in the dummy front.By hydromechanical viewpoint, the backflow of dummy front is as the flow through backflow at bluff body rear of fluid, and these backflows can cause the air-flow and cabinet internal contamination thing mixing exchange of operating personnel front, allows the pollutant levels before operating personnel's body increase simultaneously.Therefore, there are many exhaust gas cabinet producers just the basic structure of above-mentioned exhaust gas cabinet to be made amendment, hope and improve the capture usefulness of existing exhaust gas cabinet pollutant.For example baffle plate, the end of bleeding, threshold (making wing streamlined, air blowing or tonifying Qi), limit wall, cabinet door (blowing or tonifying Qi) or the like position is made an amendment, but as the basic framework theory of Fig. 1, Fig. 2 less than change.
The applicant once used tracking gas (SF6) the concentration detection method of prEN14175-3 (the exhaust gas cabinet method of testing of European Union) that many existing at present exhaust gas cabinets are detected, the result is consistent with the result of the flow-field visualized diagnosis of the described laser smog of the preceding paragraph: at threshold, usually there is continuation pollutant clearly to leak near the recirculating zone of side column, (for example personnel walk about when when the cabinet door is opened by low aperture and outside the cabinet disturbing flow being arranged, fan brushes, cold air operation, Switch for door and window or the like), existing at present exhaust gas cabinet with and the pollutant leakage rate of the exhaust gas cabinet of modified form obviously can not be satisfactory.These are modified in the technical more manpower goods and materials of cost that need of practical project, but but not necessarily obtain corresponding effect, especially under dynamic situation, the leakage benefit shape of cabinet internal contamination thing is serious, and this also is that the place major part of almost using exhaust gas cabinet to handle chemicals can be smelt the reason that obtains tart flavour.Because seldom there is static environment fully in most of actual place of exhaust gas cabinet of using, cabinet sliding door switch, personnel walk about, fan brushes, cold air operation, Switch for door and window or the like situation almost can't be avoided, so dynamic leakage is an above-mentioned existing exhaust gas cabinet and based on the challenge that improved goods faced of its basic framework.
In view of this, in order to improve above-mentioned shortcoming, make the device that prevents the pernicious gas leakage when carrying out the exhaust action, can improve the gas-dynamic leakage problem in the exhaust gas cabinet cabinet, really pernicious gas is discharged, long-pending experience and the constantly research and development improvement for many years of creator has generation of the present utility model then.
Summary of the invention
Main purpose of the present utility model is to provide a kind of device that prevents that pernicious gas from revealing, by a hollow cabinet door is set at cabinet front openings place, the upper end of described hollow cabinet door is connected with a horizontal type blower fan, to provide a bottom blowing air current towards hollow cabinet student side opening part via hollow cabinet door inside, and utilize the set air-breathing groove of bottom of cabinet bulk to suck described bottom blowing air current, form an air curtain with front openings place, and be sent to outdoor by described air-breathing groove the pernicious gas in the cabinet in cabinet.
Another purpose of the present utility model is to provide a kind of device that prevents that pernicious gas from revealing, by above cabinet, being provided with an air supply mechanism, when the air-breathing groove that is used to bottom of cabinet bulk carries out aspiratory action, the air supply mechanism via the cabinet top that extraneous air can be an amount of is entered in the cabinet, keeping the poised state of cabinet external and internal pressure, and the air curtain effect that forms of cabinet front openings place.
In order to achieve the above object, the device that pernicious gas is revealed that prevents that the utility model is set comprises a cabinet and a hollow cabinet door, has an accommodation space in the described cabinet, and its front side and above be formed with an opening that is connected with above-mentioned accommodation space respectively, wherein, described hollow cabinet door slidably is incorporated into the both sides of cabinet front openings, unlatching size with the control front openings, and the opening of described cabinet top is provided with an air supply mechanism, and the air outer for cabinet flows into described accommodation space via described air supply mechanism.Bottom in the described cabinet is provided with an air-breathing groove in the lower position of relative hollow cabinet door, and described air-breathing groove is connected with an air exhauster by an air-guiding aisle.
During enforcement, the upper end of described hollow cabinet door is connected with a horizontal type blower fan, make the inner formation one of hollow cabinet door that the blowing groove of bottom blowing air current can be provided, when sucking the bottom blowing air current of hollow cabinet door at air-breathing groove, front openings place at cabinet forms an air curtain, and is sent to outdoor via air-breathing groove the pernicious gas in the cabinet.
Compared with prior art, the device that prevents that pernicious gas from revealing described in the utility model, especially refer to a kind ofly utilize hollow cabinet door and form an air curtain in the cabinet front openings, and one air supply mechanism is set in the cabinet upper end open, leak outside with the pernicious gas in effective obstruct cabinet, and promote the eliminating efficient of pernicious gas.
For further understanding the utility model, below lift preferred embodiment, conjunction with figs., figure number describe concrete constitution content of the present utility model and the effect reached thereof as the back in detail:
Description of drawings
Fig. 1 is the side schematic view of existing exhaust gas cabinet;
Fig. 2 is the front schematic view of existing exhaust gas cabinet;
Fig. 3 is the schematic perspective view of the utility model embodiment;
Fig. 4 A is the side schematic view of the embodiment of Fig. 3;
Fig. 4 B is the side schematic view of another embodiment of the utility model;
Fig. 5 is the front schematic view of the embodiment of Fig. 3;
Fig. 6 is the result who Fig. 3, Fig. 4 A embodiment is carried out the outer disturbing flow test of cabinet with the tracking gas method of pr-EN14175-3;
Fig. 7 is the result who the existing exhaust gas cabinet of Fig. 1, Fig. 2 is carried out the outer disturbing flow test of cabinet with the tracking gas method of pr-EN14175-3;
Fig. 8 carries out the result that the cabinet door opens and closes test to embodiment and the existing exhaust gas cabinet of Fig. 4 A respectively with the tracking gas method of pr-EN14175-3.
Description of reference numerals: prevent the device-1 that pernicious gas is revealed; Cabinet-10; Accommodation space-101; Opening-102; Hollow cabinet door-11; Go up and cut-111; Following section-112; Handle-113; Air supply mechanism-12; Fairing-121; Air-breathing groove-13; Air-guiding aisle-131; Guide duct-132; Horizontal type blower fan-2; Frequency converter-21; Air blast-3; Air filter-31; Air exhauster-4; Frequency converter-41; Cabinet-the a1 of existing exhaust gas cabinet; Air exhauster-a2; Opening-a3; Sliding door-a4; Plate washer-a5; Perforate-a6.
The specific embodiment
See also Fig. 3-Fig. 5, it prevents an embodiment of the device 1 that pernicious gas is revealed for the utility model, comprise a cabinet 10, a hollow cabinet door 11, an air supply mechanism 12 and an air-breathing groove 13, be provided with one in the described cabinet 10 for the accommodation space 101 of getting rid of pernicious gas, and the front side of described cabinet 10 and top are formed with an opening 102 that is connected with above-mentioned accommodation space 101 respectively.
Described hollow cabinet door 11 is pair of lamina hollow cabinet doors, comprise upper and lower two-section 111,112, the last section 111 front end both sides that are fixed on cabinet 10 of wherein said hollow cabinet door 11, and following section 112 of described hollow cabinet door 11 slidably is arranged at going up of hollow cabinet door 11 and cuts in 111, and following section 112 of described hollow cabinet door 11 is provided with leader 113 in its front side lower end, with following section 112 of pulling hollow cabinet door 11 and the unlatching size of control cabinet 10 front openings 102.111 upper ends of go up cutting of described hollow cabinet door 11 are connected with a horizontal type blower fan 2, make the inside formation one of described hollow cabinet door 11 that the blowing groove of bottom blowing air current can be provided.During enforcement, described hollow cabinet door 11 also can be an individual layer hollow cabinet door (as shown in Figure 4), described individual layer hollow cabinet door slidably is incorporated into the both sides of described cabinet 10 front openings 102, with the unlatching size of control front openings 102, and by its inner blowing groove that bottom blowing air current can be provided that forms.During enforcement, described horizontal type blower fan 2 utilizes the control of a frequency converter 21 and changes rotating speed and air quantity.
Described air supply mechanism 12 is one to have the tonifying Qi chamber of fairing 121, and is arranged at the formed opening in cabinet 10 tops, flows in the accommodation space 101 via described tonifying Qi chamber for cabinet 10 outer air.The top of described tonifying Qi chamber is connected with an air blast 3, and air blast 3 is connected with an air filter 31, after the air filtration that cabinet 10 is outer, sends in the accommodation space 101 of cabinet 10.During enforcement, described air supply mechanism 12 also can be a work grid (shown in Fig. 4 B), mesh or porous plate (not shown), so that natural inflow to be provided.
Described air-breathing groove 13 is arranged at the place, front sides, bottom in the cabinet 10, and is oppositely arranged with the lower end of described hollow cabinet door 11.Described air-breathing groove 13 is connected with an air-guiding aisle 131, described air-guiding aisle 131 extends to cabinet 10 rear sides, and connecting an air exhauster 4 with a guide duct 132, described guide duct 132 and air exhauster 4 are arranged at cabinet 10 outsides, for the pernicious gas of getting rid of in the cabinet 10.During enforcement, described air exhauster 4 utilizes the control of a frequency converter 41 and changes rotating speed and air quantity.
Like this, when the pernicious gas in the described air-breathing groove 13 suction cabinets 10, described air supply mechanism 12 imports the air in cabinet 10 outsides in the accommodation space 101 of cabinet 10, and described horizontal type blower fan 2 provides bottom blowing air current via hollow cabinet door 11, air-breathing groove 13 is sucked simultaneously from the bottom blowing air current of hollow cabinet door 11 and the pernicious gas in the cabinet 10, and form an air curtain at front openings 102 places of cabinet 10, bleed and tonifying Qi mechanism to have concurrently, prevent that effectively the pernicious gas in the cabinet 10 from being leaked by the front side or the top opening of cabinet 10.
The applicant utilizes tracking gas (SF6) the concentration detection method of prEN14175-3, and the utility model is prevented that the device (as shown in Figure 3-Figure 5) that pernicious gas is revealed from detecting.This detection method mainly is divided into three major parts, and it is as follows briefly to narrate its method and result, and with the testing result of existing exhaust gas cabinet (as Fig. 1-shown in Figure 2) relatively.
(1) exhaust gas cabinet is placed noiseless air-flow environment, the cabinet door is opened the 50cm height, in cabinet, discharge the mist of SF6 (10%) and N2 (90%), use one nine pawl probe (nine probes are arranged in the square formation kenel of a 20cmx20cm), several position intake-gas 5 minutes (bleeding point of nine probes and cabinet door opening are in the face of neat) on cabinet door opening face, the gas that nine probes are aspirated is collected to a hybrid chamber, measures with a high-precision SF6 concentration detector and leaks concentration.The result represents that with five minutes mean value Cave and the maximum Cmax in five minutes following table is a typical results:
As seen from the above table, the leakage of the utility model in noiseless air-flow environment is close in being difficult to detection, well below the leakage rate of existing exhaust gas cabinet.
(2) the cabinet door is opened the 50cm height, in cabinet, discharge the mist of SF6 (10%) and N2 (90%), the flat board of a slice 40cmx190cmx2cm uprightly is installed on the drag gear that can move reciprocatingly, the speed that 40cm sentences 1m/s in face of the cabinet door opening is back and forth swept six times, in order to personnel before the simulation cabinet walk about, the disturbing flow of fan, cold air etc.; On average place cabinet door opening intake-gas in front with 20 suction probes, the gases that 20 probes are aspirated are collected to a hybrid chamber, measure with a high-precision SF6 concentration detector and leak concentration.Fig. 6 shows measurement of the present utility model, and Fig. 7 shows the measurement of existing exhaust gas cabinet.By Fig. 6, Fig. 7 as can be known, the utility model is because of forming a strong air curtain at cabinet door opening place, and the ability of therefore resisting the external disturbance air-flow is far superior to existing exhaust gas cabinet.
(3) the cabinet door is opened the 50cm height, in cabinet, discharge the mist of SF6 (10%) and N2, in the time of the 6th minute, the cabinet door is closed, in the time of the 10th minute, the cabinet door is opened; On average place cabinet door opening intake-gas in front with 20 suction probes, the gases that 20 probes are aspirated are collected to a hybrid chamber, measure with a high-precision SF6 concentration detector and leak concentration.The typical beam that leaks is surveyed the result as shown in Figure 8.Clearly, the utility model is at cabinet door switch motion process, and leakage rate is close in being difficult to detection, well below the leakage rate of existing exhaust gas cabinet.
Therefore, can be by learning in the above-mentioned application examples, the total flow rate of the blowing of the required supply of the utility model, air draught only reaches the half of existing exhaust gas cabinet approximately, can reach effect far below existing exhaust gas cabinet leakage rate, and because of air loss there is no increase, therefore spent electric power energy can greatly be saved.
In sum, according to the content that is above disclosed, the utility model really can reach the intended purposes of utility model, provide a kind of pernicious gas that can effectively intercept in the cabinet to leak by the front side or the top opening of cabinet, and reach the device that pernicious gas is revealed that prevents of saving the energy and effectively getting rid of pernicious gas, have the value on the industry, propose novel patent application in accordance with the law.
Claims (10)
1. device that prevents that pernicious gas from revealing is characterized in that it comprises:
One cabinet is provided with one for the accommodation space of getting rid of pernicious gas in the described cabinet, and the front side of described cabinet and top are formed with an opening that is connected with described accommodation space respectively;
One hollow cabinet door, be incorporated into the both sides of described cabinet front openings in slidable mode, with the unlatching size of control front openings, the upper end of described hollow cabinet door is connected with a horizontal type blower fan, makes the interior formation one of described hollow cabinet door that the blowing groove of bottom blowing air current can be provided;
One air supply mechanism is arranged at the formed opening in described cabinet top, and the air outer for cabinet flows into described accommodation space via described air supply mechanism; And
One air-breathing groove is arranged at the place, front side, bottom in the cabinet, and is oppositely arranged with the lower end of described hollow cabinet door, and described air-breathing groove connects an air exhauster by an air-guiding aisle;
Described hollow cabinet door forms an air curtain at the front openings place of cabinet, and described air-breathing groove can be discharged the pernicious gas in the cabinet cabinet, leaks with the front side or the top opening of the pernicious gas in the obstruct cabinet by cabinet.
2. device as claimed in claim 1, it is characterized in that, described hollow cabinet door is a pair of lamina hollow cabinet door, comprise upper and lower two-section, going up of wherein said hollow cabinet door cuts the front end both sides that are fixed on cabinet, and following section of described hollow cabinet door be arranged in going up of hollow cabinet door cut in slidable mode, and the unlatching size of control front openings.
3. device as claimed in claim 2 is characterized in that, following section of described hollow cabinet door also is provided with the leader.
4. device as claimed in claim 1 is characterized in that, described air supply mechanism is one to have the tonifying Qi chamber of fairing, and described tonifying Qi chamber is connected with an air blast, sends in the accommodation space of cabinet with the air that cabinet is outer.
5. device as claimed in claim 4 is characterized in that, described air blast also is connected with an air filter.
6. device as claimed in claim 1 is characterized in that, described air supply mechanism is a grid that supplies natural inflow to use.
7. device as claimed in claim 1 is characterized in that, described horizontal type blower fan utilizes the control of a frequency converter and changes rotating speed and air quantity.
8. device as claimed in claim 1 is characterized in that described air exhauster utilizes the control of a frequency converter and changes rotating speed and air quantity.
9. device as claimed in claim 1 is characterized in that, is connected with a guide duct between described air-guiding aisle and the air exhauster.
10. device as claimed in claim 9 is characterized in that, described guide duct and air exhauster are arranged at the cabinet outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201701766U CN201505655U (en) | 2009-08-26 | 2009-08-26 | Device capable of preventing pernicious gas from leaking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201701766U CN201505655U (en) | 2009-08-26 | 2009-08-26 | Device capable of preventing pernicious gas from leaking |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201505655U true CN201505655U (en) | 2010-06-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201701766U Expired - Fee Related CN201505655U (en) | 2009-08-26 | 2009-08-26 | Device capable of preventing pernicious gas from leaking |
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| CN (1) | CN201505655U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105019172A (en) * | 2015-07-29 | 2015-11-04 | 宁波天弘电力器具有限公司 | System for collecting spinning printing and dyeing volatile gas |
| CN109556224A (en) * | 2018-10-31 | 2019-04-02 | 珠海格力电器股份有限公司 | Positive/negative-pressure state judging method, fresh air system and the medium of fresh air system |
| CN110160713A (en) * | 2019-05-31 | 2019-08-23 | 安徽歌博科技有限公司 | A kind of helium mass spectrometer leak detector probe installation tool |
| CN110576018A (en) * | 2019-08-09 | 2019-12-17 | 成都拓维高科光电科技有限公司 | Air curtain isolating device based on mask plate cleaning application |
| CN112090912A (en) * | 2020-09-22 | 2020-12-18 | 东南大学 | Modularized air curtain separation downdraft welding smoke dust collecting device |
| CN113757886A (en) * | 2021-09-23 | 2021-12-07 | 上海飞域实验室设备有限公司 | Air purification type exhaust cabinet with purification function |
| CN116202304A (en) * | 2023-05-05 | 2023-06-02 | 苏州光斯奥光电科技有限公司 | High-temperature hot air baking method for glass panel and high-temperature hot air baking oven |
-
2009
- 2009-08-26 CN CN2009201701766U patent/CN201505655U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105019172A (en) * | 2015-07-29 | 2015-11-04 | 宁波天弘电力器具有限公司 | System for collecting spinning printing and dyeing volatile gas |
| CN109556224A (en) * | 2018-10-31 | 2019-04-02 | 珠海格力电器股份有限公司 | Positive/negative-pressure state judging method, fresh air system and the medium of fresh air system |
| CN110160713A (en) * | 2019-05-31 | 2019-08-23 | 安徽歌博科技有限公司 | A kind of helium mass spectrometer leak detector probe installation tool |
| CN110576018A (en) * | 2019-08-09 | 2019-12-17 | 成都拓维高科光电科技有限公司 | Air curtain isolating device based on mask plate cleaning application |
| CN112090912A (en) * | 2020-09-22 | 2020-12-18 | 东南大学 | Modularized air curtain separation downdraft welding smoke dust collecting device |
| CN113757886A (en) * | 2021-09-23 | 2021-12-07 | 上海飞域实验室设备有限公司 | Air purification type exhaust cabinet with purification function |
| CN113757886B (en) * | 2021-09-23 | 2022-10-14 | 上海飞域实验室设备有限公司 | Air purification type exhaust cabinet with purification function |
| CN116202304A (en) * | 2023-05-05 | 2023-06-02 | 苏州光斯奥光电科技有限公司 | High-temperature hot air baking method for glass panel and high-temperature hot air baking oven |
| CN116202304B (en) * | 2023-05-05 | 2023-09-05 | 苏州光斯奥光电科技有限公司 | High-temperature hot air baking method for glass panel and high-temperature hot air baking oven |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100616 Termination date: 20150826 |
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| EXPY | Termination of patent right or utility model |