CN104525287B - A kind of clean work station - Google Patents

Abstract

The invention relates to a purification workbench, which includes an air intake system and an exhaust system. A diffuser plate is arranged under the air intake system, and a working cavity is formed below the diffuser plate. The remaining parts are provided with small holes along the horizontal direction. The exhaust system includes a collector plate located in the working chamber and placed vertically. The opening of the collector plate gradually increases from top to bottom. A collector cover is installed outside the collector plate. The lower part of the collecting cover is connected with the exhaust device through the exhaust pipe. The airflow in the working chamber passes through the collecting plate horizontally and is collected by the collecting cover, and then is discharged by the exhaust device through the exhaust pipe. The diffuser plate of the present invention adopts the form of a sudden change hole, so that the working cavity forms two positive pressure areas, and the air pressure on the side close to the staff is greater than the air pressure on the inner side; The airflow in the body passes through the collecting plate horizontally and is collected by the collecting cover to avoid the phenomenon of airflow rebounding under the working chamber.

Description

A purification workbench

technical field

The invention relates to a clean workbench.

Background technique

In industrial production and scientific research, dust-free working environment is required in many places. The purification workbench can provide an effective working environment for these purposes and improve the efficiency of production and scientific research. However, there are some defects in the currently used workbench. Generally speaking, the clean workbench area maintains a positive pressure on the atmosphere, so that there are volatile substances in the work process that will be directly discharged to the body of the operator. This seriously affects the health of the operating personnel. At the same time, during the operation, when the hands and other parts of the operator enter the clean work area, a large amount of dust particles will also be brought in, which will affect the cleanliness of the clean work area.

The applicant applied for the Chinese invention patent CN200910211063.0 in 2009, "air wall-sealed double positive pressure purification workbench". The high-pressure air wall forms a high-pressure air wall, which effectively separates the low positive pressure area and the atmosphere, prevents the volatile substances in the low-pressure area from harming the human body, and prevents external dust particles from entering the workbench. This workbench solves the above-mentioned problems well, and is convenient for transforming the existing purification workbench.

Existing workbench exhaust systems all extract air from the bottom of the low positive pressure area, and the airflow passing through the diffuser plate often hits the bottom surface of the working chamber and then rebounds (airflow rebound phenomenon), resulting in relatively low airflow inside the working chamber. Chaos is not conducive to the rapid discharge of volatile substances.

Contents of the invention

The purpose of the present invention is to overcome the above-mentioned defects in the prior art, and propose a purification workbench, which has a reasonable structure, ensures the cleanliness of the working chamber and the safety of the operators, and avoids the phenomenon of airflow rebounding under the working chamber.

In order to achieve the above purpose, the present invention proposes a purification workbench, which includes an air intake system and an exhaust system. A diffuser plate is provided below the air intake system, and a working cavity is located below the diffuser plate. The feature is that the diffuser The side of the flow plate close to the staff is provided with large holes along the horizontal direction. The aperture range of the large holes is 18-22mm. The rest of the diffuser plate is provided with small holes along the horizontal direction. The system includes a collector plate located in the working chamber and placed vertically, the opening of the collector plate gradually increases from top to bottom, a collector cover is installed on the outside of the collector plate, and the lower part of the collector cover The exhaust pipe is connected with the exhaust device, and the airflow in the working chamber passes through the collecting plate horizontally and is collected by the collecting cover, and then is discharged by the exhaust device through the exhaust pipe.

The purification workbench of the present invention, the further improvement lies in:

1. The collector plate is located on the side away from the staff in the working cavity.

2. There are 3 rows of large holes arranged in the horizontal direction, the row spacing is 1-2mm, and the row spacing of small holes is 2-3mm.

3. The upper hole diameter of the collector plate is 5mm, the upper middle hole diameter is 10mm, the lower middle hole diameter is 15mm, and the lower hole diameter is 20mm.

The diffuser plate of the present invention adopts the form of a sudden change hole, and a large hole is opened on the front side of the diffuser plate (near the staff side), and the rest are opened with small holes, so that the air intake volume at the front side is large and the air intake volume at the rear side is small. , so that the working chamber forms two positive pressure areas, in which the air pressure on the side close to the staff is greater than the air pressure on the inner side; at the same time, the exhaust system is placed inside the working chamber and adopts the form of a gradual change hole to allow the airflow in the working chamber to pass through horizontally After the collecting plate, it is collected by the collecting cover, so as to avoid the phenomenon of air flow rebound in the exhaust system below the working chamber.

The present invention adopts above-mentioned technical scheme to have following advantage:

1. As long as the diffuser plate of the existing purification workbench is changed to a large hole on the side close to the staff, the purpose of controlling the intake air volume can be achieved, so that a double positive pressure area can be formed in the working chamber, and the high pressure area forms a high pressure The function of air wall is very economical and effective;

2. The high-pressure air wall can effectively separate the atmospheric pressure area and the low positive pressure area, preventing the volatile substances in the low positive pressure area from harming the human body;

3. When the operator is operating, the high-pressure air wall reduces the dust particles brought into the clean work surface by the operator;

4. The inside of the working cavity is equipped with a collector plate, which forms a horizontal flow inside the working cavity, which not only achieves the purpose of exhaust, but also avoids the air reflection phenomenon when the exhaust system is installed under the working cavity;

5. The internal low positive pressure area can ensure that the cleanliness of the working chamber meets the design requirements.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings.

Fig. 1 is a schematic diagram of the structure of the purification workbench of the present invention.

Fig. 2 is a schematic diagram of the diffuser plate structure of the purification workbench of the present invention.

Fig. 3 is a schematic diagram of the structure of the collector plate of the purification workbench of the present invention.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figure 1, the purification workbench of the embodiment of the present invention includes an air intake system 1 and an exhaust system. A diffuser plate 3 is arranged below the air intake system 1, and a working cavity 7 is located below the diffuser plate 3. The working cavity 7. The outer side is the glass sliding door 8, and the lower part of the working chamber 7 is the bracket 9. The side of the diffuser 3 close to the staff is provided with a large hole in the horizontal direction. The diameter of the large hole is 20mm. , the aperture of the small hole is 10mm, the exhaust system includes a collector plate 4 positioned in the working cavity 7 and placed vertically, the collector plate 4 is located on the side away from the staff in the working cavity 7, the collector plate 4 The opening gradually increases from top to bottom. A collecting cover 5 is installed on the outside of the collecting plate 4. The lower part of the collecting cover 5 is connected to the exhaust device through the exhaust pipe 6. The airflow in the working cavity 7 passes through the collecting cover horizontally. The flow plate 4 is collected by the collecting cover 5, and then discharged by the exhaust device through the exhaust pipe 6.

As shown in Figure 2, it is a schematic diagram of the diffuser plate structure of the purification workbench. There are 3 rows of large holes on the side of the diffuser plate near the staff, with a row spacing of 2mm and a row spacing of small holes of 3mm. Under the same air intake rate, the air intake volume at the front side is large, and the air intake volume at the rear side is small, so that a double positive pressure area will be formed inside the working chamber, and the air pressure at the front side is greater than the air pressure at the rear side.

As shown in Figure 3, it is a schematic diagram of the structure of the collector plate of this purification workbench. It adopts the form of a gradual change hole, and the aperture changes from top to bottom to 5mm, 10mm, 15mm, and 20mm, so that a horizontal surface will be formed inside the working chamber. flow, so that the gas can be fully exhausted.

In addition to the above-mentioned embodiments, the present invention can also have other implementations. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims (2)

1. a clean work station, comprise gas handling system, gas extraction system, diffuser plate is provided with below gas handling system, it is working cavity below diffuser plate, it is characterized in that: described diffuser plate transversely offers 3 row's macropores near staff side, trestle column is 2mm, the aperture of described macropore is 20mm, aperture is transversely offered in all the other positions of diffuser plate, the aperture of aperture is 10mm, described gas extraction system comprises and is positioned at working cavity and the collector plate of vertically placing, the perforate of described collector plate increases from top to bottom gradually, collecting cover is equipped with in the outside of described collector plate, described collecting cover bottom is connected with exhaust apparatus by blast pipe, flow level ground in working cavity is by being collected by collecting cover after collector plate, then discharged by exhaust apparatus through blast pipe, described collector plate top open pore size is 5mm, and middle and upper part open pore size is 10mm, and middle and lower part open pore size is 15mm, and bottom open pore size is 20mm.

2. clean work station according to claim 1, is characterized in that: the trestle column of aperture is 3mm.