阅读说明：本技术 一种用于微生物检测的生物安全柜 (A biological safety cabinet for microbial detection ) 是由 代真真 宋晓婉 雷蕾 张其海 于 2020-06-03 设计创作，主要内容包括：本发明公开了一种用于微生物检测的生物安全柜,涉及生物安全柜技术领域。本发明包括安全柜本体,安全柜本体上设有排风口,排风口通过一三通管连接有第一排气管,第一排气管上连接有外排气风机；三通管上还连接有第二排气管,三通管上与第二排气管连接一端设有一电动阀门和风向传感器,安全柜本体上设有用于控制电动阀门的控制器,控制器与外排气风机连接；排风口处设有第一风速传感器,第一排气管上设有第二风速传感器,第二排气管上设有第三风速传感器。本发明当外排气风机或第一排气管发生故障时,控制器控制电动阀门打开,气体从第二排气管排出,使气流保持通畅,保证了实验人员的安全性。(The invention discloses a biological safety cabinet for microbial detection, and relates to the technical field of biological safety cabinets. The safety cabinet comprises a safety cabinet body, wherein an air outlet is arranged on the safety cabinet body and is connected with a first exhaust pipe through a three-way pipe, and an outer exhaust fan is connected to the first exhaust pipe; the three-way pipe is also connected with a second exhaust pipe, one end of the three-way pipe, which is connected with the second exhaust pipe, is provided with an electric valve and an air direction sensor, the safety cabinet body is provided with a controller for controlling the electric valve, and the controller is connected with an outer exhaust fan; a first air speed sensor is arranged at the air outlet, a second air speed sensor is arranged on the first exhaust pipe, and a third air speed sensor is arranged on the second exhaust pipe. When the outer exhaust fan or the first exhaust pipe breaks down, the controller controls the electric valve to be opened, and the gas is exhausted from the second exhaust pipe, so that the gas flow is kept smooth, and the safety of experimenters is ensured.)

1. A biological safety cabinet for microbiological detection, comprising a safety cabinet body (1), characterized in that:

an air outlet (3) is formed in the upper end of the safety cabinet body (1), the air outlet (3) is connected with a first exhaust pipe (5) through a three-way pipe (4), and an outer exhaust fan (7) is connected to the first exhaust pipe (5);

the three-way pipe (4) is also connected with a second exhaust pipe (6), an electric valve (8) and an air direction sensor (12) are arranged at the joint of the three-way pipe (4) and the second exhaust pipe (6), a controller (9) for controlling the electric valve (8) is arranged on the safety cabinet body (1), and the controller (9) is connected with the outer exhaust fan (7);

the air outlet (3) is provided with a first air speed sensor (10), the first exhaust pipe (5) is provided with a second air speed sensor (11), and the second exhaust pipe (6) is provided with a third air speed sensor (14).

2. The biosafety cabinet for detecting microorganisms according to claim 1, wherein a display screen (2) and an alarm (13) are arranged on the safety cabinet body (1).

3. A biosafety cabinet for microbiological detection according to claim 2 wherein said alarm (13) is connected to said controller (9) and said wind direction sensor (12) is connected to said controller (9).

4. A biosafety cabinet for microbiological detection according to claim 1 or 2 or 3, characterized in that said first (10), second (11) and third (14) wind speed sensors are connected to said display screen (2).

5. A biosafety cabinet for microbiological detection according to claim 4, characterized in that a filter and an ultraviolet disinfection lamp are arranged in the cabinet body (1).

Technical Field

The invention belongs to the technical field of safety cabinets, and particularly relates to a biological safety cabinet for microbial detection.

Background

The discharge of the biological safety cabinet is that the polluted air can be safely discharged indoors or outdoors through a pipeline after being filtered by the high-efficiency air filter. The common external discharge pipeline is directly connected with the pipeline interface at the downstream side of the air exhaust filter of the biological safety cabinet in a sealing way, and the tail end of the pipeline is additionally provided with a pipeline type induced draft fan for outdoor discharge of the safety cabinet. After the safety cabinet is connected with the external exhaust pipeline and the external exhaust fan, the safety cabinet keeps the original exhaust air volume when the safety cabinet and the external exhaust fan normally operate; however, once the external draught fan fails, the exhaust airflow is reduced due to the on-way resistance of the exhaust pipeline, so that the flow velocity of the inflow airflow of the biosafety cabinet is reduced, the negative pressure airflow sucked inwards through the front window operation port is insufficient, and the effect of protecting personnel cannot be achieved.

The prior patent (CN201710434224.7) discloses a biosafety cabinet with an intelligent exhaust device, which adds an intelligent exhaust device at the joint of a discharge port of the biosafety cabinet and an exhaust pipeline, wherein the intelligent exhaust device comprises an annular connector and a central connecting pipe, so that the problem that the safety cabinet can still normally operate when the safety cabinet or an external exhaust fan fails is solved, but the invention has the following defects:

1. this safety cabinet normal operating, annular connector does not possess sealed effect, and exhaust harmful gas can be followed annular connector in a small amount and flowed to indoorly in the safety cabinet to cause certain danger to the experimenter, when outer exhaust fan power was too big simultaneously, outer exhaust fan can take away indoor air through annular connector, causes unnecessary consumption.

2. When outer exhaust fan broke down, a large amount of gases that the safety cabinet discharged can discharge from the annular connector indoor, the harmful effect experimenter's that discharges out security.

Disclosure of Invention

The invention aims to provide an intelligently-discharged biological safety cabinet for microbial detection.

In order to solve the technical problems, the invention is realized by the following technical scheme:

the invention relates to a biological safety cabinet for microbial detection, which comprises a safety cabinet body, wherein an air outlet is arranged on the safety cabinet body and is connected with a first exhaust pipe through a three-way pipe, and an outer exhaust fan is connected to the first exhaust pipe; the three-way pipe is also connected with a second exhaust pipe, one end of the three-way pipe, which is connected with the second exhaust pipe, is provided with an electric valve and an air direction sensor, the safety cabinet body is provided with a controller for controlling the electric valve, and the controller is connected with the outer exhaust fan; the air outlet is provided with a first air speed sensor, the first exhaust pipe is provided with a second air speed sensor, and the second exhaust pipe is provided with a third air speed sensor.

Furthermore, a display screen and an alarm are arranged on the safety cabinet body.

Further, the alarm is connected with the controller, and the wind direction sensor is connected with the controller.

Furthermore, the first wind speed sensor, the second wind speed sensor and the third wind speed sensor are all connected with the display screen.

Furthermore, a filter and an ultraviolet disinfection lamp are arranged in the safety cabinet body.

The invention has the following beneficial effects:

1. the air outlet of the safety cabinet body is connected with the first exhaust pipe and the second exhaust pipe through the three-way pipe, when the outer exhaust fan or the first outer exhaust pipe breaks down, the controller controls the electric valve to be opened, and gas in the safety cabinet is exhausted from the second exhaust pipe, so that the safety cabinet normally operates, the gas in the safety cabinet is prevented from leaking outwards, and the safety of experimenters is ensured.

2. According to the invention, the first air speed sensor is arranged at the air outlet, the second air speed sensor is arranged on the first exhaust pipe, the third air speed sensor is arranged on the second exhaust pipe, and the air speed value of each pipeline can be observed through the display screen, so that the normal operation of the safety cabinet is monitored.

3. According to the invention, the three-way valve is provided with the wind direction sensor, when the outer exhaust fan or the first outer exhaust pipe has a fault, the wind direction sensor sends a signal to the controller, and the controller controls the alarm to give an alarm so as to timely maintain the outer exhaust fan or the first outer exhaust pipe.

Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic diagram of the principles of the present invention;

in the drawings, the components represented by the respective reference numerals are listed below:

1-a safety cabinet body, 2-a display screen, 3-an air outlet, 4-a three-way pipe, 5-a first exhaust pipe, 6-a second exhaust pipe, 7-an outer exhaust fan, 8-an electric valve, 9-a controller, 10-a first air speed sensor, 11-a second air speed sensor, 12-an air direction sensor, 13-an alarm and 14-a third air speed sensor.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.

Referring to fig. 1-2, the invention is a biological safety cabinet for microorganism detection, comprising a safety cabinet body 1, a display screen 2 and an alarm 13 are arranged on the safety cabinet body 1, an air outlet 3 is arranged on the safety cabinet body 1, the air outlet 3 is connected with a first exhaust pipe 5 through a three-way pipe 4, the diameter of the first exhaust pipe 5 is the same as the diameter of the air outlet 3, an external exhaust fan 7 is connected on the first exhaust pipe 5, a second exhaust pipe 6 is also connected on the three-way pipe 4, an electric valve 8 and an air direction sensor 12 are arranged at one end of the three-way pipe 4 connected with the second exhaust pipe 6, a controller 9 for controlling the electric valve 8 is arranged on the safety cabinet body 1, when the biological safety cabinet normally operates, the electric valve 8 is closed, the gas in the biological safety cabinet is exhausted from the air outlet 3 through the first exhaust pipe 5, when the external exhaust fan 7 or the first exhaust pipe 5 fails, the wind direction sensor monitors that the airflow in the three-way pipe 4 changes, the wind direction sensor 12 sends a signal to the controller 9, the controller 9 controls the electric valve 8 to be opened, the gas is discharged from the second exhaust pipe 6, and the smoothness of the airflow and the normal operation of the safety cabinet are guaranteed, so that the influence of gas leakage on personnel safety is avoided, meanwhile, the controller 9 controls the alarm 13 to give an alarm, so that the external exhaust fan 7 and the first exhaust pipe 5 are maintained in time, and the external exhaust fan 7, the alarm 13 and the wind direction sensor 12 are all connected with the controller 9; meanwhile, the controller 7 can also control the power of the outer exhaust fan 7 to adjust the exhaust rate of the safety cabinet, a first air velocity sensor 10 is arranged at the exhaust outlet 3, a second air velocity sensor 11 is arranged on the first exhaust pipe 5, a third air velocity sensor 14 is arranged on the second exhaust pipe 6, the first air velocity sensor 10, the second air velocity sensor 11 and the third air velocity sensor 14 are all connected with the display screen 2, the air velocity value in each pipeline can be observed on the display screen 2 to monitor the normal operation of the biological safety cabinet, and when the biological safety cabinet operates normally, the air velocity V1 at the exhaust outlet is V2, wherein V2 is the air velocity in the first exhaust pipe, the air velocity V3 in the second exhaust pipe is 0, the air velocity value displayed by the air velocity sensor can be within a certain range of error, a filter and an ultraviolet disinfection lamp are arranged in the safety cabinet body 1 to filter and disinfect the exhaust gas.

The working principle of the invention is as follows: when the biological safety cabinet normally operates, the electric valve 8 is closed, the outer exhaust fan 7 operates, the safety cabinet pumps gas to the first exhaust pipe 5 from the exhaust port 3, the gas is exhausted out of the room from the first exhaust pipe 5, the values detected by the first wind speed sensor 10, the second wind speed sensor 11 and the third wind speed sensor 14 can be checked through the display screen 2 to monitor whether the biological safety cabinet normally operates, when the biological safety cabinet normally operates, the value of the display value V1 of the first wind speed sensor 10 and the value of the display value V2 of the second wind speed sensor 11 should be the same (can be within a certain range of error), and the value of the display value V3 of the third wind speed sensor 14 is basically 0; when outer exhaust fan 7 or first blast pipe 5 broke down, wind direction sensor 12 detected the air current in the three-way pipe 4 and changed, to controller 9 transmitting signal, controller 9 control electric valve 12 opens, and the air current is discharged from second blast pipe 6 outdoor, makes the air current keep unobstructed, has guaranteed experimenter's safety, and controller 9 control alarm 13 reports to the police simultaneously, in time notifies the experimenter to outer exhaust fan 7 and first blast pipe 11 are maintained.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.