CN213194989U - Variable air volume control device of laboratory ventilation cabinet - Google Patents
Variable air volume control device of laboratory ventilation cabinet Download PDFInfo
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- CN213194989U CN213194989U CN202021939779.0U CN202021939779U CN213194989U CN 213194989 U CN213194989 U CN 213194989U CN 202021939779 U CN202021939779 U CN 202021939779U CN 213194989 U CN213194989 U CN 213194989U
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- air volume
- cabinet body
- variable air
- room body
- exhaust
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Abstract
The utility model discloses a laboratory fume chamber variable air volume controlling means, including the room body, exhaust pipe, blast pipe and the cabinet body, operating panel is installed to the outer end of the cabinet body, and displacement sensor is installed on the top of the cabinet body, and personnel's detector is installed to the front end of the cabinet body, and the outer end of the cabinet body is located operating panel's upside and installs face air velocity transducer, and personnel's detector, displacement sensor and the equal and variable air volume controller electric connection of face air velocity transducer. The utility model discloses in, at first, adopt displacement sensor to add the two sensing modes of above-mentioned air velocity transducer to control cabinet body face wind speed, adopt fume chamber variable flow control technique, guarantee that fume chamber face wind speed is invariable, secondly, the minimum volume of airing exhaust of the cabinet body is to be maintained to the variable air volume butterfly valve to satisfy the actual requirement, when the abnormal conditions appears, open urgent emission pattern control system and will open whole variable air volume butterfly valves, discharge through the exhaust fan, the interior exhaust maximum amount of wind of emission system, guarantee that room pressure differential is stable.
Description
Technical Field
The utility model relates to a laboratory fume chamber technical field especially relates to laboratory fume chamber variable air volume controlling means.
Background
With the development of social economy and science and technology, various industries have higher and higher requirements on research, development and production environments, and more scientific research units, scientific enterprises and colleges using laboratory ventilation cabinets. The ventilation hood is used in the fields of schools, hospitals, food factories, research institutes, colleges, electronics, pharmacy and the like. The laboratory fume hood material has been developed from the beginning of all-wood, aluminum-wood structure to the present steel-wood, all-steel structure, pp structure, and laboratory equipment and laboratory furniture technology have been developed rapidly especially in the last 5 years. With the continuous advance of the technical strategy of the national laboratory equipment, a batch of laboratory science and technology infrastructures, national key laboratories and other projects are planned by the country, so that the demands on scientific instruments and laboratory equipment are greatly increased.
The most important facilities in the laboratory are, in addition to the laboratory tables, ventilation facilities. The construction of ventilation facilities is particularly important because the special environment of a laboratory requires that toxic and harmful gases generated in an experiment must be discharged in the laboratory, and the harm to the human health is avoided, however, the current domestic ventilation cabinet basically adopts a fixed air volume control technology, and the air volume cannot be automatically adjusted along with the change of the opening of the ventilation cabinet, so that the air speed entering the ventilation cabinet is changed (from big to small), the system is not energy-saving, the pressure fluctuation of a room is large, and the test and experiment data in the ventilation cabinet have the problems of deviation and the like.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a: the laboratory fume hood variable air volume control device is provided for solving the problems that the prior domestic fume hood basically adopts a constant air volume control technology, the air volume can not be automatically adjusted along with the change of the opening of the fume hood, and the air speed entering the fume hood is changed (from big to small), so that the system is not energy-saving, the room pressure fluctuation is large, the test and experiment data in the fume hood have deviation, and the like.
In order to achieve the above purpose, the utility model adopts the following technical scheme: laboratory fume chamber variable air volume controlling means, including the room body, install at the internal portion's of room exhaust pipe, install the blast pipe that is located exhaust pipe one side in the inside of the room body and place the cabinet body at the internal portion of room, the top and the exhaust pipe of the cabinet body are linked together, operating panel is installed to the outer end of the cabinet body, displacement sensor is installed on the top of the cabinet body, personnel's detector is installed to the front end of the cabinet body, the outer end of the cabinet body is located operating panel's upside and installs face air velocity transducer, the internally mounted of the room body has the variable air volume controller that the cooperation cabinet body used, personnel's detector, displacement sensor and face air velocity transducer all with variable air volume controller electric connection.
As a further description of the above technical solution:
the air-conditioning box is installed in the outside of the room body, the afterbody of blast pipe runs through to the outside of the room body and communicates with the air-conditioning box.
As a further description of the above technical solution:
the extension end of exhaust pipe runs through to the outside of the room body and installs the exhaust fan.
As a further description of the above technical solution:
the tail end of the exhaust pipe is located inside the room body and is provided with an auxiliary fan.
As a further description of the above technical solution:
the inside of exhaust pipe is close to the cabinet body and one side of auxiliary fan installs variable air volume butterfly valve, the inside of blast pipe is close to one side of port and also installs variable air volume butterfly valve.
As a further description of the above technical solution:
the inside in the room body has arranged the control valve spool, and control valve spool and variable air volume butterfly valve electric connection.
To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:
1. the utility model discloses in, internal cabinet body and the exhaust pipe of being equipped with in room, be equipped with operating panel on the cabinet body, personnel's detector, displacement sensor and face air sensor, be equipped with auxiliary fan and exhaust fan on the exhaust pipe, adopt displacement sensor to add the two sensing modes of above-mentioned air velocity transducer and control cabinet body face wind speed, at first detect the change of cabinet body governing door aperture through displacement sensor, the volume of airing exhaust of the control cabinet body after that, keep cabinet body face wind speed at the setting value, after the governing door position is unchangeable, face air velocity transducer actual measurement cabinet body face wind speed, thereby carry out accurate fine setting, adopt fume chamber variable flow control technique, guarantee that the cabinet face wind speed of ventilating is invariable.
2. The utility model discloses in, external air-conditioning box that is equipped with in room, internal blast pipe and the control valve spool of being equipped with in room, be equipped with variable air volume butterfly valve in exhaust pipe and blast pipe, air-conditioning box can optimize the regulation to the room humiture with the intercommunication setting of blast pipe, after cabinet body governing valve is closed, the minimum air discharge volume of the cabinet body is to be maintained to variable air volume butterfly valve, in order to satisfy the actual requirement, when the abnormal conditions appears, open urgent emission mode control system and will open whole variable air volume butterfly valves, discharge through the exhaust fan, the biggest amount of wind of exhaust in the discharge system, the setting of auxiliary blower helps helping the cabinet body to discharge fast the internal air in room, adopt the new trend system, the coordinated variable flow technique of exhaust system, guarantee that the pressure differential room is stable.
Drawings
Fig. 1 shows a diagram of a laboratory ventilation control system provided in accordance with an embodiment of the present invention;
fig. 2 shows a schematic diagram of the control of the variable air volume of the fume hood according to the embodiment of the present invention.
Illustration of the drawings:
1. a cabinet body; 2. an operation panel; 3. a person detector; 4. a displacement sensor; 5. a variable air volume butterfly valve; 6. an exhaust duct; 7. an auxiliary fan; 8. an exhaust fan; 9. an air conditioning cabinet; 10. an air supply pipe; 11. a control valve spool; 12. a surface wind speed sensor; 13. a variable air volume controller; 14. a house body.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1 and fig. 2, the present invention provides a technical solution: the laboratory fume hood variable air volume control device comprises a room body 14, an exhaust pipe 6 arranged in the room body 14, an air supply pipe 10 arranged in the room body 14 and positioned on one side of the exhaust pipe 6 and a cabinet body 1 arranged in the room body 14, wherein the top of the cabinet body 1 is communicated with the exhaust pipe 6, an operation panel 2 is arranged at the outer end of the cabinet body 1, a displacement sensor 4 is arranged at the top end of the cabinet body 1, a personnel detector 3 is arranged at the front end of the cabinet body 1, a surface air velocity sensor 12 is arranged at the outer end of the cabinet body 1 and positioned on the upper side of the operation panel 2, a variable air volume controller 13 matched with the cabinet body 1 is arranged in the room body 14, the personnel detector 3, the displacement sensor 4 and the surface air velocity sensor 12 are electrically connected with the variable air volume controller 13, the opening degree change of the cabinet body 1 is detected through the displacement sensor 4, then the exhaust, when the position of the adjusting door is unchanged, the surface wind speed sensor 12 measures the surface wind speed of the cabinet body 1 actually, so that accurate fine adjustment is carried out, the arrangement of the displacement sensor 4 enables the surface wind speed to be maintained at 0.5m/s when people are in a laboratory, and the surface wind speed is automatically switched to 0.3m/s when no people are in the laboratory.
Specifically, as shown in fig. 1, an air conditioning box 9 is installed on the outer side of the room body 14, the tail of the air supply pipe 10 penetrates through the outer side of the room body 14 to be communicated with the air conditioning box 9, the extending end of the exhaust pipe 6 penetrates through the outer side of the room body 14 to be installed with an exhaust fan 8, and the air conditioning box 9 and the air supply pipe 10 are communicated to optimally adjust the temperature and humidity of the room.
Specifically, as shown in fig. 1 and fig. 2, an auxiliary fan 7 is installed inside the exhaust pipe 6, the auxiliary fan 7 is installed inside the exhaust pipe 6, a variable air volume butterfly valve 5 is installed inside the exhaust pipe 6, the variable air volume butterfly valve 5 is installed inside the exhaust pipe 10, the variable air volume butterfly valve 5 is also installed inside the air supply pipe 10, a control valve spool 11 is arranged inside the room 14, the control valve spool 11 is electrically connected with the variable air volume butterfly valve 5, when the regulating valve of the cabinet 1 is closed, the variable air volume butterfly valve 5 maintains the minimum air volume of the cabinet 1 to meet the actual requirements, when an abnormal condition occurs, the emergency discharge mode control system is opened to open all the variable air volume butterfly valves 5, the air is discharged through the exhaust fan 8, the maximum air volume discharged in the discharge system, and the auxiliary fan 7 is provided to assist the cabinet 1 to quickly discharge the air in the room 14.
The working principle is as follows: when the wind speed control device is used, the displacement sensor 4 and the surface wind speed sensor 12 are adopted to control the surface wind speed of the cabinet body 1, firstly, the change of the opening degree of the adjusting door of the cabinet body 1 is detected through the displacement sensor 4, then, the air exhaust quantity of the cabinet body 1 is controlled, the surface wind speed of the cabinet body 1 is kept at a set value, when the position of an adjusting door is unchanged, the surface wind speed sensor 12 actually measures the surface wind speed of the cabinet body 1, so that accurate fine adjustment is carried out, when the adjusting door of the cabinet body 1 is closed, the variable air volume butterfly valve 5 needs to maintain the minimum air exhaust quantity of the cabinet body 1 to meet the actual requirement, when the surface wind speed sensor 12 carries out actual measurement on the surface wind speed of the cabinet body 1, the variable air volume controller 13 can display the actual surface wind speed value of the cabinet body 1 in real time, when the surface wind speed exceeds the set range, when abnormal conditions occur, the emergency discharge mode control system is started, all the variable air volume butterfly valves 5 are opened, the air is discharged through the exhaust fan 8, and the maximum air volume discharged in the discharge system is not controlled by the surface air speed value.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (6)
1. Variable air volume control device of laboratory fume chamber, including the room body (14), install exhaust pipe (6) inside the room body (14), install blast pipe (10) that are located exhaust pipe (6) one side in the inside of the room body (14) and place at the cabinet body (1) inside the room body (14), its characterized in that, the top and the exhaust pipe (6) of the cabinet body (1) are linked together, operating panel (2) are installed to the outer end of the cabinet body (1), displacement sensor (4) are installed on the top of the cabinet body (1), personnel's detector (3) are installed to the front end of the cabinet body (1), face air velocity transducer (12) are installed to the upper side that the outer end of the cabinet body (1) is located operating panel (2), the internally mounted of the room body (14) has variable air volume controller (13) that the cooperation cabinet body (1) used, personnel's detector (3), The displacement sensor (4) and the surface wind speed sensor (12) are electrically connected with the variable air volume controller (13).
2. The laboratory fume hood variable air volume control device according to claim 1, characterized in that an air conditioning box (9) is installed on the outer side of the room body (14), and the tail part of the blast pipe (10) penetrates through the outer side of the room body (14) to be communicated with the air conditioning box (9).
3. The laboratory fume hood variable air volume control device according to claim 2, wherein the extending end of the exhaust duct (6) is penetrated to the outside of the room body (14) and is provided with an exhaust fan (8).
4. The laboratory fume hood variable air volume control device according to claim 3, characterized in that the tail end of the exhaust duct (6) is provided with an auxiliary fan (7) inside the room body (14).
5. The laboratory fume hood variable air volume control device according to claim 4, characterized in that a variable air volume butterfly valve (5) is installed on one side of the inside of the exhaust pipe (6) close to the cabinet body (1) and the auxiliary fan (7), and a variable air volume butterfly valve (5) is also installed on one side of the inside of the blast pipe (10) close to the port.
6. The laboratory fume hood variable air volume control device according to claim 1, characterized in that a control valve spool (11) is arranged inside the room body (14), and the control valve spool (11) is electrically connected with the variable air volume butterfly valve (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021939779.0U CN213194989U (en) | 2020-09-08 | 2020-09-08 | Variable air volume control device of laboratory ventilation cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021939779.0U CN213194989U (en) | 2020-09-08 | 2020-09-08 | Variable air volume control device of laboratory ventilation cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213194989U true CN213194989U (en) | 2021-05-14 |
Family
ID=75844441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021939779.0U Active CN213194989U (en) | 2020-09-08 | 2020-09-08 | Variable air volume control device of laboratory ventilation cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213194989U (en) |
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2020
- 2020-09-08 CN CN202021939779.0U patent/CN213194989U/en active Active
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