CN204294243U - Biohazard Safety Equipment - Google Patents

Abstract

The utility model provides a biological safety cabinet, which includes a top wind gathering hood, an operating room, a wind gathering chamber and a fan; the wind gathering chamber is arranged above the operating room, and the wind gathering chamber and A first filter layer for filtering is arranged between the operating chambers; the wind collecting cover is arranged in the wind collecting cavity, and the wind collecting cover faces the first filter layer; one end of the fan is connected to the outside The air source is connected, the other end is open and the opening is facing the wind collecting hood; a second filter layer is arranged at the communication part between the operating room and the outside; the wind collecting hood is bowl-shaped. The fan guides the wind direction to the wind collecting hood, and further changes the air flow state through the wind collecting hood to make the air distribution through the first filter layer more uniform.

Description

biological safety cabinet

technical field

The utility model relates to a biological safety cabinet.

Background technique

At present, the biological safety cabinet is a kind of equipment often used in the preparation of various drugs. It is forced to exhaust the air through the ventilation device, which can forcibly discharge the harmful substances that spread into the air during the preparation of the medicine, or when operating the primary culture, When using infectious experimental materials such as bacterial strains and diagnostic specimens, it is used to protect the operator, the laboratory environment and experimental materials from exposure to infectious aerosols and splashes that may be generated during the above operations .

Airflow control is the core technology of biological safety cabinets. As a qualified biological safety cabinet, in addition to the airflow velocity that needs to meet the requirements, the airflow also needs to achieve directionality, stability and uniformity to meet the requirements of biohazard tests.

Chinese patent (publication number CN202725194 U) provides a kind of biological safety cabinet, comprises cabinet, and the top of described cabinet is provided with exhaust port, and the bottom of described vent is provided with filter, and the upper part of described cabinet is provided with air vent. The air duct is made of plastic, the middle part of the air duct is connected to the blower, the left and right air inlets are respectively provided on both sides of the cabinet, and the left and right air inlets are connected to the air duct , the lower part of the cabinet body is provided with a flushing table, the flushing table is provided with a flushing tank, the flushing tank is made of stainless steel, the lower part of the flushing tank is connected to the outlet pipe, and the upper part of the washing tank is provided with a water inlet pipe, The front part of the water inlet pipe is provided with a water inlet switch.

Although the above-mentioned technical solution can increase the ventilation volume in the cabinet, its defect is that the air velocity at each position in the cabinet is not balanced, which may easily cause the same samples to be in different temperature and humidity environments in different placement positions.

Utility model content

The technical problem to be solved by the utility model is to overcome the defect of unbalanced air velocity in the prior art and provide a biological safety cabinet with more uniform air flow in the cabinet.

The utility model solves the problems of the technologies described above through the following technical solutions:

A biological safety cabinet is characterized in that it includes a top wind gathering hood, an operating room, a wind gathering chamber and a fan;

The wind collecting chamber is arranged above the operation chamber, and a first filter layer for filtering is arranged between the wind collecting chamber and the operation chamber;

The wind collecting cover is arranged in the wind collecting cavity, and the wind collecting cover faces the first filter layer;

One end of the fan communicates with an external air source, and the other end is open and the opening faces the wind collecting hood;

A second filter layer is provided at the place where the operating chamber communicates with the outside;

The wind gathering cover is bowl-shaped.

That is to say, the fan will seal and blow the wind-gathering hood, and because the wind-gathering hood is bowl-shaped, the airflow diverges from the bowl-shaped opening and evenly conducts to the first filter layer between the wind-gathering cavity and the operating room.

Preferably, several air holes are provided on the outer wall of the operation chamber, and an interlayer is arranged outside the outer wall, and the interlayer communicates with the outside and is filled with filter materials.

Preferably, the interlayer communicates with the fan, and the fan is used to guide the air in the operating room to the wind collecting hood through the interlayer.

Here, the interlayer is filled with filter material to form the above-mentioned second filter layer.

The positive and progressive effect of the utility model lies in that: the fan guides the wind direction to the wind collecting cover, and further changes the air flow state through the wind collecting cover to make the air distribution through the first filter layer more uniform.

Description of drawings

Fig. 1 is a perspective view of a biological safety cabinet according to a preferred embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a biological safety cabinet according to a preferred embodiment of the present invention.

Detailed ways

A preferred embodiment is given below, and the utility model is described more clearly and completely in conjunction with the accompanying drawings.

Fig. 1 is the three-dimensional view of the biological safety cabinet of this embodiment, Fig. 2 is the structural representation of the biological safety cabinet of this embodiment, as shown in Fig. , an operating room 3, an air gathering cavity 2 and a blower fan 6. Wherein, the wind collecting chamber 2 is arranged above the operation chamber 3 , and a filter layer 7 for filtering is arranged between the wind collecting chamber 2 and the operation chamber 3 .

The filter layer 7 adopts an ultra-high efficiency air filter (ULPA). ULPA (Ultra Low Penetration Air Filter) is called an ultra-high efficiency air filter, or an ultra-low penetration air filter. The filtration efficiency of dust particles can reach more than 99.999%. ULPA is based on HEPA (High efficiency particulate air filter, high-efficiency air filter), and further strengthens the filtering effect of HEPA. The filtering efficiency of ULPA for particles above 0.3 microns reaches more than 99.9999%. Compared with HEPA, ULPA has a more compact filter structure and higher filtration efficiency, but at the same time, the resistance is also higher. ULPA filter features: the filter element is made of ultra-fine glass fiber filter material folded by glue, the outer frame can be made of sandwich wood, galvanized copper plate, stainless steel plate and aluminum alloy plate, and it is tightly bonded by polyurethane glue, which is light in weight and breathable Large amount, the dust collection rate is as high as 99.95-99.999%, and it is resistant to alkali and high temperature. It is suitable for 10000-100 clean systems and air-conditioning systems, so the products have been widely used in electronics, microelectronics, semiconductors, optical devices, biological and medical circuits, cameras and optical instruments, precision machinery and other fields.

The filter is a key component in the biological safety cabinet, which mainly plays the role of filtering bacteria and dust particles to purify the gas blown into the working area of the safety cabinet and discharged. The filter used in the safety cabinet must have sufficient filtration efficiency, otherwise it will not be able to protect against biological hazards. The filter material should be silicate glass fiber. At present, HEPA high-efficiency filters with an interception efficiency of 99.99% for 0.3μm dust particles and ULPA ultra-high-efficiency filters with an interception efficiency of 99.9998% are often used in safety cabinets. The latter has better filtration efficiency, tighter structure and larger unit filtration area, which can provide the cleanliness equivalent to ISO class 3 in the working area.

The wind collecting cover 1 is arranged in the wind collecting cavity 2 , and the wind collecting cover 1 faces the filter layer 7 . The wind gathering cover 1 is bowl-shaped. The outer wall of the operating room 3 is provided with some air holes, and an interlayer 8 is arranged outside the outer wall. The interlayer 8 communicates with the blower 6 , and the fan 6 is used to guide the air in the operating room 3 to the wind gathering hood 1 through the interlayer 8 . The interlayer 8 is filled with filter material, and the filter material in the interlayer 8 is glass fiber.

In addition, the fan 6 blows the airflow to the bowl-shaped wind collecting hood 1 through a pipeline 61 , the pipeline 61 is facing the center of the wind collecting hood 1 , and the opening is trumpet-shaped. The bottom of the operating room 3 is an operating table 4, and the side walls of the operating room 3 are provided with glass doors that can be opened. The lower part of the operating room 3 is provided with supporting legs for supporting the entire biological safety cabinet.

Although the specific implementation of the utility model has been described above, those skilled in the art should understand that this is only an example, and the protection scope of the utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principle and essence of the present utility model, and these changes and modifications all fall within the protection scope of the present utility model.

Claims (3)

1. A biological safety cabinet, characterized in that it includes a top wind gathering hood, an operating room, a gathering wind cavity and a blower fan; The wind collecting chamber is arranged above the operation chamber, and a first filter layer for filtering is arranged between the wind collecting chamber and the operation chamber; The wind collecting cover is arranged in the wind collecting cavity, and the wind collecting cover faces the first filter layer; One end of the fan communicates with an external air source, and the other end is open and the opening faces the wind collecting hood; A second filter layer is provided at the place where the operating chamber communicates with the outside; The wind gathering cover is bowl-shaped. 2. The biological safety cabinet according to claim 1, wherein a plurality of air holes are provided on the outer wall of the operating room, and an interlayer is arranged outside the outer wall, and the interlayer communicates with the outside and is filled with filter materials. 3. The biological safety cabinet according to claim 2, wherein the interlayer communicates with the fan, and the fan is used to guide the air in the operating room to the wind collecting hood through the interlayer .