Ventilation cabinet with air supplement wing plates

Abstract

The utility model provides a fume hood with an air supplement wing plate, which comprises a fume hood body, the air supplement wing plate is arranged at the bottom of a door frame of a sliding door of the fume hood body, and the length of the air supplement wing plate is equal to that of a transverse inner cavity of the door frame; the air supplement wing plate comprises a horizontal air inlet plate and an arc-shaped flow guide plate, a U-shaped blocking part is formed at the free end of the upper side of the arc-shaped flow guide plate, an L-shaped connecting part is formed at the lower part of the arc-shaped flow guide plate, and a vertical blocking part is formed on the side, close to the L-shaped connecting part, of the horizontal air inlet plate; a plurality of strip-shaped air inlet holes are orderly, linearly and uniformly formed in the horizontal air inlet plate in the length direction of the horizontal air inlet plate; a plurality of air holes are linearly and uniformly formed in the side face, perpendicular to the horizontal air inlet plate, of the U-shaped blocking part in the length direction of the horizontal air inlet plate; a rectangular cushion frame is arranged at the position, corresponding to the air supplementing wing plate, of the bottom of the ventilation inner cavity of the ventilation cabinet body, and the lower surface of the U-shaped blocking part is fixedly attached to the upper surface of the rectangular cushion frame. And the air supplementing uniformity is improved, and the air supplementing efficiency is also improved.

Description

Technical Field

[0001] This utility model relates to the field of fume hood technology, and in particular to a fume hood with a supplemental air fin. Background Technology

[0002] Chinese Patent Publication No. CN221816980U, published on October 11, 2024, discloses a ventilation mechanism for a fume hood, relating to the field of fume hood technology. It utilizes a supply fan to deliver air and an exhaust fan to exhaust air, forming a cycle to achieve ventilation and remove polluted gases from the upper cabinet. A filter is incorporated to filter the air supplied by the supply fan. The makeup air mechanism, utilizing Bernoulli's principle, allows fresh air to enter the cabinet through pre-drilled makeup air holes in the window after the viewing window is fully closed, serving as makeup air for the fume hood, increasing its exhaust volume, and effectively removing toxic gases, thereby improving operator safety. The existing technology has a drawback: the small makeup air area leads to uneven makeup air distribution and low makeup air efficiency. This situation urgently needs to be addressed. Utility Model Content

[0003] Therefore, the purpose of this utility model is to provide a fume hood with a make-up air vane. By setting the make-up air vane, the uniformity of the make-up air is improved, and the efficiency of the make-up air is also improved.

[0004] This utility model provides a fume hood with an air supply vane, including a fume hood body. An air supply vane is provided at the bottom of the door frame of the fume hood body's sliding door. The length of the air supply vane is equal to the transverse inner length of the door frame. The air supply vane includes a horizontal air inlet plate and an arc-shaped guide plate. A U-shaped blocking portion is formed at the upper free end of the arc-shaped guide plate, and an L-shaped connecting portion is formed at the lower part of the arc-shaped guide plate. A vertical blocking portion is formed on the side of the horizontal air inlet plate facing the L-shaped connecting portion. A plurality of strip-shaped air inlets are evenly and linearly distributed along the length of the horizontal air inlet plate. The side of the U-shaped blocking portion perpendicular to the horizontal air inlet plate... A number of air holes are linearly and evenly distributed along the length direction; a rectangular pad frame is provided at the bottom of the ventilation cavity of the fume hood body, corresponding to the position of the air supply wing plate; the lower surface of the U-shaped obstruction part is attached and fixed to the upper surface of the rectangular pad frame; the upper surface of the rectangular pad frame is in contact with the horizontal air inlet plate; the rectangular pad frame extends into the air supply cavity; the opposite two sides of the door frame in the vertical direction are formed with air guiding arc surfaces on the side facing the sliding door; the horizontal air inlet plate, the vertical obstruction part, the arc-shaped air guiding plate, the rectangular pad frame, and the U-shaped obstruction part form an air supply channel; one side of the horizontal air inlet plate is fixedly connected to the bottom of the ventilation cavity of the fume hood body.

[0005] Preferably, the upper surface of the vertical blocking portion is lower than the upper surface of the rectangular pad frame.

[0006] The beneficial effects of this utility model are as follows: By setting an air supply wing plate at the bottom of the door frame of the fume hood body, the length of the air supply wing plate is equal to the horizontal inner cavity length of the door frame. The horizontal air inlet plate, vertical obstruction part, arc-shaped guide plate, rectangular pad frame and U-shaped obstruction part form an air supply channel, so that the external airflow can pass through the strip air inlet hole and enter the air supply channel from the horizontal air inlet plate, and then enter the fume hood from the air hole of the U-shaped obstruction part. By setting the vertical obstruction part, the airflow entering the air supply channel is guided to the upper part of the arc-shaped guide plate, and the airflow is then guided to the position of the U-shaped obstruction part along the arc of the arc-shaped guide plate, which improves the smoothness of the airflow, thereby improving the uniformity of the air supply and also improving the efficiency of the air supply. Attached Figure Description

[0007] Figure 1 This is a perspective view of the present invention.

[0008] Figure 2 This is a side sectional view of the present invention.

[0009] Figure 3 A partial 3D view of the supplementary airfoil.

[0010] Figure 4 A three-dimensional view of the auxiliary airfoil.

[0011] Figure 5 This is a side view of the supplementary airfoil.

[0012] Figure 6 for Figure 2 Enlarged view of point A in the image.

[0013] The attached figures are labeled as follows: fume hood body 10, door frame 11, air guide arc surface 12, air supply wing plate 13, U-shaped obstruction part 14, horizontal air inlet plate 15, strip-shaped air inlet hole 16, arc-shaped air guide plate 17, L-shaped connecting part 18, air hole 19, vertical obstruction part 20, rectangular pad frame 22, sliding door 21, ventilation cavity 24. Detailed Implementation

[0014] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with specific embodiments and accompanying drawings.

[0015] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0016] Reference Figure 1-6 As shown, a fume hood with an air supply wing includes a fume hood body 10. An air supply wing 13 is provided at the bottom of the door frame 11 of the door 21 of the fume hood body 10. The length of the air supply wing 13 is equal to the transverse inner length of the door frame 11. The air supply wing 13 includes a horizontal air inlet plate 15 and an arc-shaped guide plate 17. A U-shaped blocking part 14 is formed at the upper free end of the arc-shaped guide plate 17, and an L-shaped connecting part 18 is formed at the lower part of the arc-shaped guide plate 17. A vertical blocking part 20 is formed on the side of the horizontal air inlet plate 15 facing the L-shaped connecting part 18. A plurality of strip-shaped air inlets 16 are arranged linearly and evenly along the length of the horizontal air inlet plate 15. The side of the U-shaped blocking part 14 that forms a perpendicular relationship with the horizontal air inlet plate 15 is linearly and evenly distributed along its length. A number of air holes 19 are provided; a rectangular pad frame 22 is provided at the bottom of the ventilation cavity of the fume hood body 10, corresponding to the position of the air supply wing plate 13. The lower surface of the U-shaped blocking part 14 is attached and fixed to the upper surface of the rectangular pad frame 22. The upper surface of the rectangular pad frame 22 is in contact with the horizontal air inlet plate 15. The rectangular pad frame 22 extends into the air supply cavity; the opposite two sides of the door frame 11 in the vertical direction are formed with a guide arc surface 12 on the side of the sliding door 21 to achieve the purpose of guiding external gas; the horizontal air inlet plate 15, the vertical blocking part 20, the arc-shaped guide plate 17, the rectangular pad frame 22, and the U-shaped blocking part 14 surround to form an air supply channel 23; one side of the horizontal air inlet plate 15 is fixedly connected to the bottom of the ventilation cavity 24 of the fume hood body 10.

[0017] Preferably, the upper surface of the vertical blocking portion 20 is lower than the upper surface of the rectangular pad frame 22.

[0018] In this embodiment, an air supply wing plate is provided at the bottom of the door frame of the fume hood body. The length of the air supply wing plate is equal to the horizontal inner cavity length of the door frame. A horizontal air inlet plate, a vertical obstruction, an arc-shaped guide plate, a rectangular pad frame, and a U-shaped obstruction form an air supply channel, allowing external airflow to pass through the strip-shaped air inlet hole and enter the air supply channel from the horizontal air inlet plate, and then enter the fume hood from the air hole of the U-shaped obstruction. By setting the vertical obstruction, the airflow entering the air supply channel is guided to the upper part of the arc-shaped guide plate, and the airflow is then guided to the position of the U-shaped obstruction along the arc of the arc-shaped guide plate, improving the smoothness of airflow, thereby improving the uniformity of air supply and improving the efficiency of air supply.

[0019] The above-described embodiments are merely one implementation of this utility model, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A fume hood with a make-up air vane, comprising a fume hood body (10), characterized in that, The bottom of the door frame (11) of the door (21) of the fume hood body (10) is provided with an air supply wing plate (13), the length of which is equal to the length of the transverse inner cavity of the door frame (11); the air supply wing plate (13) includes a horizontal air inlet plate (15) and an arc-shaped guide plate (17), the upper free end of the arc-shaped guide plate (17) forms a U-shaped blocking part (14), the lower part of the arc-shaped guide plate (17) forms an L-shaped connecting part (18), and the side of the horizontal air inlet plate (15) facing the L-shaped connecting part (18) forms a vertical blocking part (20); the horizontal air inlet plate (15) is provided with a number of linearly evenly distributed strip-shaped air inlets (16) along its length direction, and the side of the U-shaped blocking part (14) that forms a perpendicular relationship with the horizontal air inlet plate (15) is provided with a number of air holes linearly evenly distributed along its length direction. (19); A rectangular pad frame (22) is provided at the bottom of the ventilation cavity of the fume hood body (10) corresponding to the position of the air supply wing plate (13). The lower surface of the U-shaped blocking part (14) is attached and fixed to the upper surface of the rectangular pad frame (22). The upper surface of the rectangular pad frame (22) is in contact with the horizontal air inlet plate (15). The rectangular pad frame (22) extends into the air supply cavity. The opposite two sides of the door frame (11) in the vertical direction are formed with a guide arc surface (12) on the side of the sliding door (21). The horizontal air inlet plate (15), the vertical blocking part (20), the arc guide plate (17), the rectangular pad frame (22), and the U-shaped blocking part (14) surround and form an air supply channel (23). One side of the horizontal air inlet plate (15) is fixedly connected to the bottom of the ventilation cavity (24) of the fume hood body (10).

2. A fume hood with a make-up air vane according to claim 1, characterized in that: The upper surface of the vertical blocking part (20) is lower than the upper surface of the rectangular pad frame (22).

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