Air purification unit structure

Abstract

The utility model discloses an air purification unit structure which comprises a shell, a fan arranged at the top of an inner cavity of the shell and a high-efficiency filter below the fan, an air outlet is formed below the high-efficiency filter, the air purification unit structure is characterized in that the air outlet comprises a main air opening and an auxiliary air opening, and the air flow direction of the main air opening is vertically downward to form a main clean area; the auxiliary air openings are formed in the periphery of the main air opening and are annularly and obliquely arranged, airflow is obliquely blown into the operation area, and an auxiliary clean area separating the non-operation area from the main clean area is formed. According to the utility model, the range of the clean area is expanded through the air outlet formed by combining the vertical airflow and the inclined airflow, the cleanliness of the main clean area is not influenced, and the cleanliness stability of the detection area is improved.

Description

Technical Field

[0001] The utility model relates to the field of purification equipment, in particular to an air purification unit structure. Background Art

[0002] The Fan-Filter Unit (FFU) is a self-powered terminal air supply device with filtering function. The fan draws air from the top and filters it through a high-efficiency filter. The filtered clean air is evenly delivered at a wind speed of approximately (0.45±0.1) m / s across the entire air outlet surface to meet the cleanliness requirements of the clean room. It is widely used in clean rooms of all levels, clean workbenches, clean production lines, assembled clean rooms, laminar flow hoods, clean booths, and small micro-environment (Mini-Env ironment) clean areas, etc., and has a very wide range of applications.

[0003] Existing purification units such as Figure 1 As shown, it includes a shell 1, a fan 2 arranged at the top of the inner cavity of the shell 1, and a high-efficiency filter 3 below the fan 2. The inhaled air flow passes through the high-efficiency filter 3 and flows vertically downward, and evenly downward from the air outlet. The area blown by the clean air flow is the clean area. Under normal circumstances, the purification unit is a vertical air outlet mode, and the area within the dotted lines on both sides is the main test area, so the cleanliness of sampling position 1 can be guaranteed. However, air flow vortices are easily generated on the periphery of the air outlet surface, which can easily induce particles in the surrounding air to enter the main test area. As the air supply distance increases, the downward air flow diffuses, and the wind speed also decreases. When the wind speed decreases, particles in the air are more likely to enter the main test area, causing the cleanliness around the purification unit to be substandard, so the cleanliness of sampling positions 2 and 3 is difficult to guarantee. Summary of the Invention

[0004] The utility model aims to provide an air purification unit structure, which, through structural improvement, expands the air outlet without affecting the main air volume, avoids the generation of eddy currents around the test area, and ensures the cleanliness of the clean area.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: an air purification unit structure, including a shell, a fan arranged at the top of the inner cavity of the shell, and a high-efficiency filter below the fan, below the high-efficiency filter is an air outlet, the air outlet includes a main air outlet and an auxiliary air outlet, the air flow of the main air outlet flows vertically downward to form a main clean area; the auxiliary air outlet is arranged around the main air outlet, arranged in a circular inclined manner, and the air flow is blown obliquely into the working area to form an auxiliary clean area separating the non-working area and the main clean area.

[0006] In the above technical solution, a cover is provided at the air outlet, which includes a horizontal panel and beveled panels on all sides. The horizontal panel is evenly distributed with a plurality of vertical holes, and the airflow is vertically downward to form the main clean area; the beveled panel is evenly distributed with a plurality of expansion holes, and the airflow is blown out obliquely to form the auxiliary clean area.

[0007] In the above technical solution, the air outlet rate of the expansion hole is 30% to 40% of the air outlet rate of the vertical hole.

[0008] In the above technical solution, the top end of the cover is connected to the shell, and the horizontal panel and the beveled panel are exposed below the installation main structure and protrude from the top surface of the main structure.

[0009] In the above technical solution, the bevel angle of the beveled panel is 120° to 165°, and the diameter of the expanded hole is a microhole with a diameter less than 1 mm.

[0010] In the above technical solution, the cover is a split structure, including a main body surrounded by beveled panels, and a flow equalizing plate composed of horizontal panels. A mounting opening is opened in the middle of the main body, and the flow equalizing plate is clamped in the mounting opening.

[0011] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0012] 1. The air outlet of the utility model includes a main air outlet and an auxiliary air outlet. The auxiliary air outlet is arranged obliquely around the main air outlet to provide lateral airflow supplement to the main air outlet. A main clean zone is formed below the main air outlet, and an auxiliary clean zone is formed around it. The auxiliary clean zone provides a barrier for the main clean zone, thereby preventing particles at the edge of the main clean zone from entering the main clean zone, ensuring the cleanliness around the purification unit and stabilizing the purification performance.

[0013] 2. A cover is installed at the air outlet, including a horizontal panel and surrounding beveled panels. The vertical holes on the horizontal panel form the main clean zone, and the expansion holes on the beveled panel form the auxiliary clean zone with oblique airflow. At the same time, the air outlet rate of the expansion holes is set to 30% to 40% of the air outlet rate of the vertical holes to ensure the air outlet volume of the main air outlet without affecting the cleanliness of the main clean zone;

[0014] 3. The utility model has a simple structure and is easy to implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the background technology structure of the present utility model;

[0016] Figure 2 It is a structural schematic diagram of an embodiment of the utility model;

[0017] Figure 3 yes Figure 2An enlarged top view of the middle cover;

[0018] Figure 4 yes Figure 2 An enlarged bottom view of the middle cover.

[0019] Among them: 1. Shell; 2. Fan; 3. HEPA filter; 4. Air outlet; 5. Cover; 6. Horizontal panel; 7. Bevel panel; 8. Vertical hole; 9. Main clean area; 10. Expansion hole; 11. Auxiliary clean area; 12. Main structure. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0021] Example: See Figure 2-4 As shown, an air purification unit structure includes a housing 1, a fan 2 arranged at the top of the inner cavity of the housing 1, and a high-efficiency filter 3 below the fan 2. Below the high-efficiency filter 3 is an air outlet 4, which includes a main air outlet and an auxiliary air outlet. The airflow of the main air outlet flows vertically downward to form a main clean area 9; the auxiliary air outlets are arranged around the main air outlet in a circular and inclined arrangement. The airflow blows obliquely into the working area, forming an auxiliary clean area 11 separating the non-working area and the main clean area 9. Here, the non-working area is the periphery of the detection area.

[0022] A cover 5 is provided at the air outlet 4, which includes a horizontal panel 6 and beveled panels 7 on all sides. The horizontal panel 6 is evenly distributed with a plurality of vertical holes 8, and the airflow is vertically downward to form a main clean area 9; the beveled panel 7 is evenly distributed with a plurality of expansion holes 10, and the airflow is blown out obliquely to form an auxiliary clean area 11.

[0023] In one embodiment, the air output rate of the expansion hole 10 is 30% to 40% of the air output rate of the equalizing hole 8. The air output rate can be adjusted by the aperture ratio or aperture size. Experimental tests and calculations show that when the aperture ratio and aperture ratio of the expansion hole 10 are both 35% of the aperture ratio of the vertical hole 8, the air output in the vertical direction remains unchanged, and the cleanliness of the main clean area 9 is not affected, which is the most preferred value.

[0024] like Figure 2 As shown, the top of the cover 5 is connected to the housing 1, and the horizontal panel 6 and the beveled panel 7 are exposed below the main structure 12 (the installation position of the purification unit), protruding from the top surface of the main structure 12. The beveled angle of the beveled panel 7 is 120° to 165°, and the expansion hole 10 is a micropore with a diameter of less than 1 mm.

[0025] In one embodiment, the housing 5 is a split structure, comprising a main body formed by chamfered panels 7 and a flow equalizer formed by horizontal panels 6. A mounting opening is defined in the center of the main body, into which the flow equalizer is mounted. This split structure facilitates installation, replacement, and adjustment of the flow equalizer, providing greater flexibility.

[0026] The utility model artificially creates an "expanded" purification area around the air outlet of the purification unit, such as Figure 2 The cleanliness of the expanded clean areas B and C (the edges of the main clean area) can be sampled and tested (e.g., PAO particle counting) on ​​the left and right sides of the test area to meet cleanliness standards. Therefore, the auxiliary clean area is set up to generate a weak wind speed around the main clean area without affecting the air volume of the vertical airflow, forming an expanded clean space. This also provides a protective area for the main clean area, preventing the generation of eddy currents, and effectively preventing particles from entering the main clean area, ensuring the stable cleanliness of the test area.

Claims

1. An air purification unit structure, comprising a housing, a fan disposed at the top of the housing cavity, and a high-efficiency filter below the fan, wherein an air outlet is located below the high-efficiency filter, characterized in that: The air outlet includes a main air outlet and an auxiliary air outlet. The airflow of the main air outlet flows vertically downward to form a main clean area. The auxiliary air outlet is arranged around the main air outlet and arranged in a circular inclined manner. The airflow blows obliquely into the working area to form an auxiliary clean area separating the non-working area and the main clean area.

2. The air purification unit structure according to claim 1, characterized in that: A cover is provided at the air outlet, which includes a horizontal panel and beveled panels on all sides. The horizontal panel is evenly distributed with a plurality of vertical holes, and the airflow is vertically downward to form the main clean area; the beveled panel is evenly distributed with a plurality of expansion holes, and the airflow is blown out obliquely to form the auxiliary clean area.

3. The air purification unit structure according to claim 2, characterized in that: The air outlet rate of the expansion hole is 30% to 40% of the air outlet rate of the vertical hole.

4. The air purification unit structure according to claim 2, characterized in that: The top end of the cover is connected to the shell, and the horizontal panel and the beveled panel are exposed below the installation main structure and protrude from the top surface of the main structure.

5. The air purification unit structure according to claim 2, characterized in that: The bevel angle of the beveled panel is 120° to 165°, and the diameter of the expansion hole is a microhole with a diameter less than 1 mm.

6. The air purification unit structure according to claim 2, characterized in that: The cover shell is a split structure, including a main body surrounded by beveled panels and a flow equalizing plate composed of horizontal panels. A mounting opening is opened in the middle of the main body, and the flow equalizing plate is clamped in the mounting opening.

Images