Air return box of weighing cover

Abstract

The utility model discloses an air return box of a weighing cover, which comprises a box body, a fan, an out-efficiency filter and a high-efficiency filter are arranged in the box body, the box body comprises a vertical box body and a horizontal box body, an air return port is arranged on the lower side of the vertical box body, and the out-efficiency filter and the high-efficiency filter are respectively arranged in the vertical box body. Mounting openings are formed in the positions, where the primary filter and the high-efficiency filter are arranged, of the left side of the vertical box body, mounting doors are arranged on the mounting openings, sliding rail grooves are formed in the front side wall, the rear side wall and the right side wall of the vertical box body, and jacking screws capable of jacking the primary filter or the high-efficiency filter are arranged on the mounting doors; the mounting opening is formed in the vertical box body, the mounting door is arranged on the mounting opening, the sliding rail grooves are formed in the front side wall, the rear side wall and the right side wall of the vertical box body, and the puller screws are arranged on the mounting door, so that during mounting, a primary filter and a high-efficiency filter can be directly pushed into the sliding rail grooves in the vertical box in a sliding manner through the mounting opening, and then the mounting door is mounted on the mounting opening; and the top-level screw is tightened, so that the disassembly and assembly are very convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of weighing hoods, and particularly relates to a return air box of a weighing hood. Background Technique

[0002] The laminar flow vehicle weighing hood is a purification device designed for weighing raw and auxiliary materials, drying materials or sampling products in a purification area, and is mainly used in places such as pharmaceutical manufacturing, microbiological research and scientific experiments. The return air box of the weighing hood is one of its main components, which is mainly used to sterilize and purify the return air in the operation area, and then recycle it into the operation area.

[0003] Regarding the return air box of the weighing hood, after retrieval, the utility model patent with the Chinese patent publication number CN218608551U discloses a return air box of a weighing hood, as Figure 1 shown, which mainly includes a box body a. An initial filter b and a high-efficiency filter are arranged inside the box body a. Among them, a clamping groove is arranged inside the box body, and a spring stud is arranged inside the clamping groove. The box body fixes the initial filter and the high-efficiency filter by means of a spring stud buckle.

[0004] For the return air box with a technical solution similar to the above in the prior art, it is found that there are areas to be improved during the actual implementation. The initial filter and the high-efficiency filter are installed inside the return air box, and generally the return air box needs to span the upper and lower heights of the operation area. Therefore, the return air box is generally relatively long. Therefore, during installation, it is necessary to enter the inside of the return air box and push the initial filter and the high-efficiency filter into the return air box, resulting in very inconvenient installation of the initial filter and the high-efficiency filter. Content of the Utility Model

[0005] In view of the deficiencies and defects existing in the prior art, the purpose of the present utility model is to provide a return air box of a weighing hood, which solves the problem that in the prior art, when installing the return air box of the weighing hood, it is necessary to enter the inside of the return air box and push the initial filter and the high-efficiency filter into the return air box, resulting in very inconvenient installation of the initial filter and the high-efficiency filter.

[0006] To solve the above technical problems, the present utility model adopts the following technical solutions: An air return box of a weighing hood, comprising a box body, in which a fan, a pre-filter and a high-efficiency filter are arranged. The box body is an inverted L shape, including a vertical box body at the lower side and a horizontal box body at the upper side. A return air port is arranged at the lower side of the vertical box body, and a return air net is arranged on the return air port. The pre-filter and the high-efficiency filter are respectively arranged in the vertical box body, and an installation opening is arranged at the position where the pre-filter and the high-efficiency filter are arranged on the left side of the vertical box body. An installation door is arranged on the installation opening. Slide rail grooves capable of clamping the pre-filter and the high-efficiency filter are arranged on the front, rear and right side walls of the vertical box body. Tightening screws capable of pressing tightly against the pre-filter or the high-efficiency filter are arranged on the installation door; A plurality of arc-shaped guide plates are arranged in sequence from left to right at the top inside the horizontal box body, and an air outlet is arranged on the right side of the horizontal box body, and a plurality of air outlet holes are arranged on the lower side of the horizontal box body.

[0007] As a further improvement of the present utility model, a dust collection box is arranged at the lower right side of the bottom of the vertical box body below the return air port, and an open cover is arranged on the upper part of the dust collection box.

[0008] As a further improvement of the present utility model, a card slot is arranged on the vertical box body at the position where the dust collection box is arranged, and the left side of the dust collection box is clamped into the card slot.

[0009] As a further improvement of the present utility model, the installation door is clamped in the installation opening, and the installation door is connected to the vertical box through a connecting plate and a connecting bolt.

[0010] As a further improvement of the present utility model, the return air net is connected to the vertical box through bolts.

[0011] Compared with the prior art, the present utility model has the following advantages:

[0012] 1. By arranging an installation opening at the position where the pre-filter and the high-efficiency filter are arranged on the left side of the vertical box body, an installation door is arranged on the installation opening, and slide rail grooves capable of clamping the pre-filter and the high-efficiency filter are arranged on the front, rear and right side walls of the vertical box body. Tightening screws capable of pressing tightly against the pre-filter or the high-efficiency filter are arranged on the installation door. During installation, the pre-filter and the high-efficiency filter can be directly slid and pushed into the slide rail grooves in the vertical box body through the installation opening, and then the installation door is installed on the installation opening and the top-level screws are tightened, so that the tightening screws press against the pre-filter or the high-efficiency filter, making the pre-filter or the high-efficiency filter stable. Then, there is no need to enter the vertical box body during installation, and the disassembly and assembly are very convenient.

[0013] In addition, by arranging arc-shaped guide plates in the horizontal box body, the air flowing horizontally in the horizontal box body can be downwardly deflected and flow, facilitating the air to flow out from the air outlet holes and enter the operation space area.

[0014] 2. By providing a dust collection box at the right side of the bottom of the vertical box below the air return opening, when cleaning the air return net without disassembling it, the dust and debris generated during cleaning can fall into the dust collection box, preventing pollution in the operation space area. An openable cover is provided on the upper part of the dust collection box. When not in use for cleaning, the cover can be closed to prevent impurities in the dust collection box from entering the operation space area and causing pollution.

[0015] 3. By clamping the installation door in the installation opening and connecting the installation door to the vertical box through a connecting plate and connecting bolts, it is convenient to disassemble the installation door. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present utility model will be further described below with reference to the accompanying drawings:

[0017] Figure 1 is a structural schematic diagram of the prior art;

[0018] Figure 2 is a structural schematic diagram of the present utility model;

[0019] Figure 3 is Figure 2 an enlarged view at A;

[0020] Figure 4 is Figure 2 an enlarged view at B;

[0021] In the figures: 1, box body; 101, vertical box body; 102, horizontal box body; 2, fan; 3, primary filter; 4, high-efficiency filter; 5, air return opening; 6, air return net; 7, installation opening; 8, installation door; 9, slide rail groove; 10, tightening screw; 11, arc-shaped deflector; 12, air outlet; 13, air outlet hole; 14, dust collection box; 15, card slot; 16, openable cover. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following will Figure 2-4 further describe the present utility model in detail. For a clearer illustration, only the structures related to the inventive points of the present utility model are shown in the figures.

[0023] For the convenience of description, a coordinate system is now defined as Figure 2 shown, with the left-right direction being the horizontal direction, the front-back direction being the longitudinal direction, and the up-down direction being the vertical direction.

[0024] An embodiment of the present utility model discloses an air return box of a weighing hood. Refer to Figure 2, a return air box of a weighing hood, comprising a box body 1, in which a fan 2, a primary efficiency filter 3 and a high efficiency filter 4 are arranged. The box body 1 is an inverted L shape, including a vertical box body 101 at the lower side and a horizontal box body 102 at the upper side. A return air port 5 is arranged at the lower side of the vertical box body 101, and a return air net 6 is arranged on the return air port 5. As Figure 4 shown, the return air net 6 is connected to the vertical box by bolts. The primary efficiency filter 3 and the high efficiency filter 4 are respectively arranged in the vertical box body 101, and an installation opening 7 is arranged at the left side of the vertical box body 101 at the position where the primary efficiency filter and the high efficiency filter 4 are arranged. An installation door 8 is arranged on the installation opening 7. As Figure 2 and Figure 3 shown, the installation door 8 is stuck in the installation opening 7, and the installation door 8 is connected to the vertical box through a connecting plate and a connecting bolt, so that it is convenient to disassemble the installation door 8. Slide rail grooves 9 capable of clamping the primary efficiency filter and the high efficiency filter 4 are arranged on the front, rear and right side walls of the vertical box body 101, and a tightening screw 10 capable of pressing tightly against the primary efficiency filter or the high efficiency filter 4 is arranged on the installation door 8; A plurality of arc-shaped guide plates 11 are arranged in sequence from left to right at the top of the inner part of the horizontal box body 102, an air outlet 12 is arranged at the right side of the horizontal box body 102, and a plurality of air outlet holes 13 are arranged at the lower side of the horizontal box body 102.

[0025] In addition, as Figure 2 and Figure 4 shown, a dust collection box 14 is arranged at the right side of the bottom of the vertical box below the return air port 5, and an open cover 16 is arranged at the upper part of the dust collection box 14; When cleaning the return air net 6 without disassembling the return air net 6, the dust and debris generated during cleaning can fall into the dust collection box 14, avoiding pollution of the operation space area. An open cover 16 is arranged at the upper part of the dust collection box 14, which can be covered when not cleaning to avoid impurities in the dust collection box 14 from entering the operation space area, so as to avoid pollution. In addition, a card slot 15 is arranged on the vertical box at the position where the dust collection box 14 is arranged, and the left side of the dust collection box 14 is clamped into the card slot 15.

[0026] In the utility model, an installation opening 7 is arranged at the left side of the vertical box body 101 at the position where the primary efficiency filter and the high efficiency filter 4 are arranged, an installation door 8 is arranged on the installation opening 7, slide rail grooves 9 capable of clamping the primary efficiency filter and the high efficiency filter 4 are arranged on the front, rear and right side walls of the vertical box body 101, and a tightening screw 10 capable of pressing tightly against the primary efficiency filter or the high efficiency filter 4 is arranged on the installation door 8. During installation, the primary efficiency filter and the high efficiency filter 4 can be directly slid into the slide rail grooves 9 in the vertical box through the installation opening 7, and then the installation door 8 is installed on the installation opening 7, and the top-level screw is tightened, so that the tightening screw 10 presses against the primary efficiency filter or the high efficiency filter 4, making the primary efficiency filter or the high efficiency filter 4 stable. Therefore, it is not necessary to enter the vertical box during installation, and the disassembly and assembly are very convenient.

[0027] In addition, by arranging an arc-shaped flow guide plate 11 in the horizontal box, the air flowing horizontally in the horizontal box can be guided downward, facilitating the air to flow out from the air outlet hole 13 and enter the operation space area.

[0028] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations. It should be understood that the specific embodiments described herein are only for understanding the present utility model and are not used to limit the present utility model. All other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

Claims

1. A return air box of a weighing hood, comprising a box body, a fan, an output filter and a high efficiency filter are arranged in the box body, characterized in that: The box body is an inverted L-shape, comprising a vertical box body on the lower side and a horizontal box body on the upper side. A return air outlet is provided on the lower side of the vertical box body, and a return air net is provided on the return air outlet. The primary filter and the high-efficiency filter are respectively arranged in the vertical box body, and an installation port is provided on the left side of the vertical box body at the position where the primary filter and the high-efficiency filter are arranged, and an installation door is provided on the installation port. Slide rail grooves that can be used to clamp the primary filter and the high-efficiency filter are provided on the front and rear side walls and the right side wall of the vertical box body, and a tightening screw that can tighten the primary filter or the high-efficiency filter is provided on the installation door; a plurality of arc-shaped guide plates are arranged in sequence from left to right on the top of the horizontal box body, and an air outlet is arranged on the right side of the horizontal box body, and a plurality of air outlet holes are arranged on the lower side of the horizontal box body.

2. The return air box of a weighing hood according to claim 1, characterized in that: A dust collecting box is provided on the right side of the bottom of the vertical box below the return air outlet, and an opening cover is provided on the upper part of the dust collecting box.

3. The return air box of a weighing hood according to claim 1, characterized in that: A card slot is provided on the vertical box at the position where the dust collecting box is arranged, and the left side of the dust collecting box is inserted into the card slot.

4. The return air box of a weighing hood according to claim 1, characterized in that: The installation door is stuck in the installation opening, and the installation door is connected to the vertical box through a connecting plate and connecting bolts.

5. A return air box for a weighing hood according to any one of claims 1 to 4, characterized in that: The return air network is connected to the vertical box through bolts.

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