Structure for punching face of wall-mounted intake filter unit and door pocket

Abstract

To provide a structure for a punching face of a wall-mounted intake filter unit and a door pocket that can effectively utilize narrow spaces such as inside door pockets to serve as air intakes.SOLUTION: A punching face 14 is positioned in a door pocket 20 between a retaining wall 12 on which a filter unit 11 is provided and a sliding door 13 covering a position at 16 to 24 mm in front of the retaining wall 12. The punching face 14 consists of a rectangular front panel 23 and a frame portion 24 with a height of 7 to 11 mm rising from an upper end, a lower end and left and right side edges of the front panel 23. A number of punching holes 23a are formed in the front panel 23, and an opening 22 extending in a longitudinal direction is formed in the frame portion 24. In a structure 10 for a door pocket, the punching face 14 is used as an intake filter unit 11.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a punching face for a wall suction filter unit and a door pocket structure using the same. [Background technology]

[0002] In clean rooms and the like, air outlets and intakes are provided on the ceiling and floor or on opposing side walls, and the air is purified to a certain extent by a filter unit such as a HEPA filter before being taken into the room or released to the outside (see Patent Document 1).In such filter units, a filter box is provided inside the air outlet, and the filter element is pushed in and then covered and fixed with a punched face.

[0003] A perforated face is part of a fixture, and is often made three-dimensional to provide rigidity in order to support its own weight and maintain its shape. On the other hand, as in the air purifier of Patent Document 2, an air inlet may be provided in the main body case, and a filter may be placed inside the air inlet. However, when the air inlet is provided on a wall surface of a room or hallway, a perforated face that protrudes as little as possible and is thin is required so as not to obstruct the passage of people or objects.

[0004] Patent Documents 3 and 4 propose space-saving technologies that utilize the space within a door pocket (sliding door storage area) as an air passage. The ventilation system in Patent Document 3 forms air vents consisting of numerous vertical slits in the partition wall between the room and the hallway, allowing for indoor ventilation even when the entrance is closed with a sliding door. Sound-absorbing material is attached to the sliding door and buttresses to suppress ventilation noise. Patent Document 4 proposes a partition configuration in which a vent with a louver that can be opened and closed is provided on the surface panel of the door pocket, and the surface panel can be attached and removed. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 63-46327 [Patent Document 2] Japanese Patent Application Laid-Open No. 2001-324181 [Patent Document 3] Japanese Patent Application Publication No. 10-318581 [Patent Document 4] Japanese Utility Model Application Publication No. 49-106107 Summary of the Invention [Problem to be solved by the invention]

[0006] In the clean room of Patent Document 1, perforated surfaces are widely spread over the floor, etc., but it is not economical to apply such a structure to the intake ports of the partition walls between the corridor and the room. It is also possible to use part of the main body case of the air purifier of Patent Document 2 as a perforated surface, or to apply it to the buttress wall inside the door pocket as in Patent Documents 3 and 4. However, there are significant space constraints, such as the sliding doors that enter and exit the door pocket.

[0007] The present invention aims to provide a punching face and door pocket structure for a wall suction filter unit with a simple configuration that can effectively utilize a narrow space such as inside a door pocket to form an air intake. [Means for solving the problem]

[0008] The punching face 14 of the present invention is a punching face 14 that is arranged in a narrow space (door pocket 20) between a wall (buttress 12) on which a filter unit 11 is provided and a plate (sliding door 13) that covers a position 16 to 24 mm in front of the wall (12), and is attached to the wall (12), and is characterized in that it consists of a rectangular front panel 23 and a frame portion 24 that is 7 to 11 mm high and rises from the upper and lower ends and left and right side edges of the front panel 23, with a number of punching holes 23a formed in the front panel 23, and a number of openings 22 formed in the frame portion 24 that connect the space surrounded by the frame portion 24 to the outside and extend in the longitudinal direction of the frame portion 24.

[0009] In such a punching face 14, it is preferable that the narrow space is a door pocket 20, the plate body is a sliding door 13 stored in the door pocket 20, the wall is the buttress 12 of the door pocket 20, and the gap d between the sliding door 13 and the front panel 23 when stored is 8 to 12 mm. Also, it is more preferable that the ratio K (S / d×Y) of the total area S of the openings 22 to the gap area between the sliding door 13 and the front panel 23 (gap d × corresponding outer perimeter length Y) is in the range of 0.6 to 0.9. Also, it is preferable that one of the frame parts 24 having the opening 22 abuts against a partition wall 28 that separates the inside of the door pocket 20 from the outside 30, and that the abutting portion of the partition wall 28 communicates with the outside 30.

[0010] The door pocket structures 10, 10A of the present invention comprise a buttress 12 on which a filter unit 11 is mounted, a sliding door 13 that can be opened and closed to cover a position 16 to 24 mm in front of the buttress 12, and a punching face 14 attached to the buttress 12, and the punching face 14 comprises a rectangular front panel 23 and a frame portion 24 that is 7 to 11 mm high and rises from the upper and lower ends and left and right side edges of the front panel 23, with a number of punching holes 23a formed in the front panel 23 and a number of openings 22 formed in the frame portion 24 that connect the space surrounded by the frame portion 24 to the outside and extend in the longitudinal direction of the frame portion 24. [Effects of the Invention]

[0011] The punching face of the present invention has multiple openings in the frame that connect the inside and outside of the frame. Therefore, even if the front panel is covered by a plate through a small gap, air can be drawn in through both the gap and the openings. Furthermore, air flowing along the gap between the wall and the plate covering the wall at a position 16 to 24 mm forward is blocked by the frame, so it is efficiently drawn directly into the openings formed in the frame. Therefore, the punching face can be installed even in a narrow door pocket.

[0012] When such a punching face is applied to a filter unit inside a door pocket, in the case where the narrow space is a door pocket, the plate body is a sliding door stored in the door pocket, the wall is a buttress of the door pocket, and the gap between the sliding door and the front panel when stored is 8 to 12 mm, that is, when applied to a filter unit inside a door pocket, an intake port can be formed in a space-saving manner.

[0013] Furthermore, when the ratio K (S / d×Y) of the total area S of the opening to the gap area between the sliding door and the front panel (gap d × corresponding outer perimeter length Y) is in the range of 0.6 to 0.9, there is a good balance between the amount of air sucked in through the punched holes and the amount of air sucked in through the opening.

[0014] Furthermore, if one of the frame parts having the opening abuts against a partition wall inside the door pocket and the abutting portion of the partition wall is connected to the outside, air can be drawn in directly from the outside through the partition wall, making it possible to draw in air even more efficiently.

[0015] The door pocket structure of the present invention employs a punching face similar to the punching face described above, so that the narrow space within the door pocket can be effectively utilized. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a perspective view of a main part showing an embodiment of a door pocket structure of the present invention. [Figure 2] FIG. 2 is a schematic plan cross-sectional view of the structure of the door pocket. [Figure 3] 1 is a perspective view of a main portion showing one embodiment of a punching face of the present invention. FIG. [Figure 4] 4A is an enlarged plan view of a main part of the punching face, FIG. 4B is an enlarged front view of the main part, and FIG. 4C is a cross-sectional view taken along line IV-IV in FIG. 4B. [Figure 5] FIG. 10 is a schematic front view showing another embodiment of the door pocket structure. DETAILED DESCRIPTION OF THE INVENTION

[0017] The door pocket structure 10 shown in Figures 1 and 2 consists of a buttress 12 on which a filter unit 11 is mounted, a sliding door 13 that travels back and forth 16 to 24 mm in front of the buttress 12, and a punching face 14 attached to the buttress 12. Reference numeral 15 denotes a partition wall that separates an interior room 16 from an exterior room 17. Reference numeral 18 denotes a door frame, and reference numeral 19 denotes a passage that opens and closes by operating the sliding door 13. The space enclosed by the buttress 12 and the sliding door 13 is the door pocket 20.

[0018] Here, the sliding door 13 being "open" means that the sliding door 13 has moved to the right in Fig. 1 and the passage 19 is open, that is, the sliding door 13 is covering the punching face 14. Conversely, the sliding door 13 being "closed" means that the passage 19 is closed by the sliding door 13 and the front of the punching face 14 is open. The sliding door 13 may be, for example, a hollow wooden flush door.

[0019] As shown in FIG. 2, the filter unit 11 is partially embedded in the buttress 12. One end of a duct 21 that draws in air is connected to the back of the filter unit 11, and the other end of the duct 21 is connected to a pump or the like that draws in air. The filter unit 11 is filled with a filter F. A HEPA filter or the like is used as the filter F. As can be seen from FIG. 2, when the sliding door 13 covers the perforated face 14, the space inside the door pocket 20 is narrow, and the gap D between the surface of the buttress 12 and the back of the sliding door 13 is, for example, approximately 16 to 24 mm. The space for the perforated face 14 to draw in the surrounding air, i.e., the remaining gap d (the gap d between the front panel and the sliding door) obtained by subtracting the thickness T of the perforated face 14 from the aforementioned distance S, is even narrower.

[0020] In this door pocket structure 10, the punching face 14, as shown in FIG. 3, consists of a rectangular front panel 23 and thin plate-like frame portions 24 rising from the upper and lower ends and left and right side edges of the front panel 23. Numerous punching holes 23a are formed in the front panel 23. The punching holes 23a are essentially the same as conventional ones, and are, for example, numerous holes with an outer diameter of 2.4 to 3.6 mm arranged at 3.2 to 4.8 mm pitches in a rectangular range of 530 to 790 mm in both the vertical and horizontal directions. The opening ratio is approximately 40 to 60%. No punching holes 23a are provided in a strip-like or frame-shaped range of 52 to 78 mm at the upper, left, right, and lower ends. This frame-shaped range acts as a guide to direct air entering through opening 22, described later, into the interior.

[0021] In order to maximize the amount of air flowing into the punching face 14, the punching face 14 has openings 22 for drawing air in on the top and side surfaces, as well as on the frame portion 24 on the bottom surface, in addition to the punching holes 23a on the surface of the punching face 14. The opening 22 on the bottom surface may be omitted. The openings 22 extend in the longitudinal direction of the frame portion 24.

[0022] Such a punched face 14 can be manufactured by cutting a thin metal plate such as a stainless steel plate having a thickness of, for example, 0.8 to 1.5 mm, particularly 1 to 1.4 mm, punching a large number of punched holes 23a in the area excluding the peripheral edge (frame), forming openings 22 in the peripheral edge, and then bending to form a frame portion 24. The frame portion and the frame portion 24 may be integrally formed by punching and bending, and a punched metal with punched holes 23a may be joined to the back side of the frame.

[0023] The front panel 23 and each frame portion 24 may be made of synthetic resin. Whether they are made of metal or synthetic resin, the front panel 23 and each frame portion 24 may be manufactured separately and then joined together. Alternatively, some of the frame portions 24 may be folded, and the other frame portions 24 may be made of separate members.

[0024] As shown in FIG. 4A, the width W of the opening 22 is approximately 0.5 to 0.7 times the thickness T (8 to 12 mm) of the punching face 14, or approximately 5 to 9 mm, and the length L is approximately 2.4 to 3.6 times the height H (7 to 11 mm) of the frame portion 24, or approximately 24 to 36 mm, making it rectangular. The opening 22 is formed by a press process such as punching before the frame portion 24 is folded. The edge of the opening 22 on the front panel 23 side is made approximately flush with the back surface of the front panel 23, as shown in FIG. 4C. This facilitates the folding process, since the only area that is actually folded is the portion 25 between adjacent openings 22.

[0025] 4A and 4B, reference numeral 26 denotes a screw hole for passing a flat head screw 27, and the edge of the screw hole 26 is tapered. By using the flat head screw 27, the thickness T of the punching face 14 can be made even thinner.

[0026] The ratio K (S / d×Y) of the total area S of the openings to the area of ​​the gap between the sliding door 13 and the front panel 23 (gap d × corresponding outer periphery length Y (= 4 times the side of the punching face)) is preferably in the range of 0.6 to 0.9. This provides a good balance between the amount of air flowing in through the openings 22 and the amount of air flowing in through the punching holes 23a. If the ratio K is greater than 0.9, the amount of air sucked in through the punching holes 23a will be excessive, and if it is less than 0.6, the amount of air sucked in through the openings will be excessive, which is undesirable. In addition, the area ratio of the openings 22 to the portions 25 between them is preferably about 0.4 to 0.7. If the area ratio is smaller than this range, the strength will be weakened, and if it is exceeded, the amount of air sucked in will decrease.

[0027] In the door pocket structure 10 configured as described above, when the sliding door 13 closes the passage (reference numeral 19 in FIG. 1) as shown in FIG. 2, the area in front of the punching face 14 is wide open, allowing sufficient air to be taken in through the punching holes 23a (see arrow P1). On the other hand, when the sliding door 13 is housed in the door pocket 20, the air flow (see arrow P2) moving along the gap D between the buttress 12 and the sliding door 13 hits the approximately right-angled opening 22, allowing for straight air suction. Therefore, despite the small gap between the front panel 23 and the sliding door 13, the amount of air suctioned across the punching face 14 does not decrease significantly. Furthermore, room pressure fluctuations can be kept small.

[0028] In the door pocket structure 10A shown in Figure 5, the filter unit 11 is positioned closer to the outside 30, such as a corridor, and the frame portion 24 on the side of the punching face 14 is flush with the inner surface of the partition wall 28. The portion of the partition wall 28 corresponding to the frame portion 24 communicates with the outside 30, and is provided with, for example, a louver 29. In this door pocket structure 10A, when the sliding door 13 is opened, air is sucked in through the louver 29 on the side of the door pocket 20, preventing contaminated air from leaking out.

[0029] Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these, and various modifications can be made without departing from the spirit of the invention. For example, in the embodiment shown in FIG. 1, the lower end of the punching face 14 is spaced apart from the floor, thereby making full use of the openings 22 around it. However, it can also be disposed on the floor (see FIG. 5). In the above embodiment, the openings 22 are rectangular, but they may also be oval or other shapes. [Explanation of symbols]

[0030] 10, 10A Door pocket structure 11 Filter unit F Filter 12 Buttress 13 Sliding door 14 Punching Face 15 Partition Wall 16 Indoor 17 Outdoors 18 Door Frame 19 Passage 20 Door pocket 21 Duct 22 Aperture L opening length W Opening width H Frame height 23 Front Panel 23a Punching hole 24 Frame 25 Area between adjacent openings 26 screw holes 27 Flat head screws S, S1 gap T punching face thickness D Gap between the buttress and the sliding door d Gap between the front panel and the sliding door P1, P2 Arrows indicating air flow 28 Partition Wall 29 Garari 30 external Y Perimeter of punching face S Total opening area

Claims

1. A punching face is disposed in a narrow space between a wall on which a filter unit is provided and a plate body covering a position 16 to 24 mm in front of the wall, and is attached to the wall, A rectangular front panel; It consists of a frame portion with a height of 7 to 11 mm that rises from the upper end, lower end, and left and right side edges of the front panel, Numerous punched holes are formed on the front panel, The punching face has a plurality of openings formed in the frame portion, the openings connecting the space surrounded by the frame portion with the outside and extending in the longitudinal direction of the frame portion.

2. The narrow space is a door pocket, The plate body is a sliding door stored in a door pocket, The wall is a buttress for a door pocket, When stored, the gap between the sliding door and the front panel is 8 to 12 mm.

2. The punching face according to claim 1.

3. The ratio K (S / d×Y) of the total area S of the opening to the gap area (gap d×corresponding perimeter length Y) between the sliding door and the front panel is in the range of 0.6 to 0.9; 3. The punching face according to claim 2.

4. One of the frame parts having the opening abuts against a partition wall that separates the inside of the door pocket from the outside, and the abutting part of the partition wall communicates with the outside.

3. The punching face according to claim 2.

5. a buttress on which the filter unit is provided; a sliding door that can be freely opened and closed to cover a position 16 to 24 mm in front of the buttress; It consists of a punching face that is attached to the buttress, The punching face comprises a rectangular front panel and frame portions each having a height of 7 to 11 mm rising from the upper end, lower end, and left and right side edges of the front panel, Numerous punched holes are formed on the front panel, The frame portion has a plurality of openings formed therein, the openings communicating the space surrounded by the frame portion with the outside and extending in the longitudinal direction of the frame portion. Door pocket structure.

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