# US 2022/0034532 A1 · Air curtain device and method for manufacturing the same

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- Number: US 2022/0034532 A1
- Document ID: US20220034532A1
- Status: Published application
- Kind: A1
- Application number: 17/386,318
- Filed: 2021-07-27
- Published: 2022-02-03
- Earliest claimed: 2020-07-29
- Assignees: National Taipei University of Technology
- Applicants: National Taipei University of Technology
- Inventors: Shih-Cheng HU; Ti LIN
- Web page: https://patentgrep.com/patent/US20220034532A1

## CPC

- F24F 9/00: Use of air currents for screening, e.g. air curtains
- F24F 13/0245: {Manufacturing or assembly of air ducts; Methods therefor}
- F24F 2009/007: {using more than one jet or band in the air curtain}
- F24F: AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING (removing dirt or fumes from areas where they are produced B08B15/00; vertical ducts for carrying away waste gases from buildings E04F17/02; tops for chimneys or ventilating shafts, terminals for flues F23L17/02)

## Abstract

A method for manufacturing an air curtain device includes steps of: a) providing a frame that includes two side wall bodies and two end wall bodies cooperatively defining an inner space thereamong, and an upper opening and a lower opening through which the inner space communicates with the external environment; b) covering an upper surface and a lateral outer surface of the frame with a first covering layer; c) closing the lower opening by placing an air-permeable plate; d) sealing a gap between the air-permeable plate and the frame by a first adhesive; e) removing a portion of the first covering layer that covers the upper surface of the frame; and f) closing the upper opening by a cover that is sealingly connected to the frame.

## Claims

### Claim 1

A method for manufacturing an air curtain device, comprising steps of:
a) providing a frame, said frame including
two side wall bodies that are spaced apart from each other, and
two end wall bodies that interconnect said side wall bodies, and that cooperate with said side wall bodies to define an inner space thereamong, upper edges of said side wall bodies and said end wall bodies cooperatively forming a first connecting section, lower edges of said side wall bodies and said end wall bodies cooperatively forming a second connecting section, said first connecting section and said second connecting section respectively defining an upper opening and a lower opening through which said inner space communicates with the external environment;
b) covering an upper surface and a lateral outer surface of each of said side wall bodies and said end wall bodies with a first covering layer;
c) closing said lower opening of said frame by placing an air-permeable plate that abuts against a surface of said second connecting section facing said inner space, said air-permeable plate having a plurality of pores to thereby be air permeable;
d) sealing a gap between said air-permeable plate and said second connecting section of said frame by a first adhesive;
e) removing a portion of said first covering layer that covers said upper surface of each of said side wall bodies and said end wall bodies; and
f) closing said upper opening of said frame by a cover that is sealingly connected to said first connecting section of said frame.

### Claim 2 (depends on 1)

The method as claimed in claim 1, wherein:
said first connecting section of said frame is indented with a groove surrounding said upper opening and is formed with a plurality of threaded holes;
said cover has an annular protrusion protruding from a bottom surface thereof and coupled to said groove, and is formed with a plurality of through holes respectively corresponding in position to said threaded holes; and
step f) includes sub-steps of
f1) applying a second adhesive to said groove,
f2) coupling said annular protrusion of said cover with said groove of said first connecting section,
f3) fastening said cover to said first connecting section by a plurality of screwing members that respectively extend through said through holes and that respectively and threadedly engage said threaded holes, so that said cover and said first connecting section are sealingly connected by said second adhesive and said upper opening of said frame is closed.

### Claim 3 (depends on 2)

The method as claimed in claim 2, wherein step f) further includes, before sub-step f2), a sub-step of f4) covering a lateral surrounding surface of said cover with a second covering layer.

### Claim 4 (depends on 3)

The method as claimed in claim 3, further comprising, after step f), a step of g) removing said second covering layer that covers said cover, and the rest portion of said first covering layer that covers said lateral outer surface of each of said side wall bodies and said end wall bodies.

### Claim 5 (depends on 1)

The method as claimed in claim 1, wherein:
one of said frame and said cover is formed with at least one inlet opening through which said inner space of said frame communicates with the external environment; and
said method further comprising, before step f), a step of h) connecting at least one gas fitting to said at least one inlet opening.

### Claim 6 (depends on 1)

The method as claimed in claim 1, wherein:
said frame is formed by a base frame member and a plurality of plate members located over and connected to said base frame member, adjacent ones of said plate members being connected to each other, said base frame member and said plate members cooperatively defining said side wall bodies and said end wall bodies; and
in executing step d), said first adhesive is applied to a junction between said base frame member and each of said plate members, and to a junction between any adjacent ones of said plate members.

### Claim 7

An air curtain device comprising:
a frame including
two side wall bodies that are spaced apart from each other,
two end wall bodies that interconnect said side wall bodies, and that cooperate with said side wall bodies to define an inner space thereamong, upper edges of said side wall bodies and said end wall bodies cooperatively forming a first connecting section, lower edges of said side wall bodies and said end wall bodies cooperatively forming a second connecting section, said first connecting section and said second connecting section respectively defining an upper opening and a lower opening through which said inner space communicates with the external environment, wherein said frame is formed by abase frame member that has a base protruding part surrounding said inner space and protruding upwardly and a plurality of plate members each of which is indented with a base-connecting recess, is located over said base frame member, and is coupled to said base protruding part by said base-connecting recess thereof, wherein said base frame member and said plate members cooperatively define said side wall bodies and said end wall bodies;
an air-permeable plate abutting against a surface of said second connecting section of said frame that faces said inner space and closing said lower opening, said air-permeable plate having a plurality of pores to thereby be air permeable;
a cover sealingly connected to said first connecting section of said frame to thereby close said upper opening of said frame, one of said frame and said cover being formed with at least one inlet opening through which said inner space of said frame communicates with the external environment;
a first adhesive applied to a gap between said air-permeable plate and said second connecting section of said frame, to a junction between said base frame member and each of said plate members, and to a junction between any adjacent ones of said plate members; and
at least one gas fitting connected to said at least one inlet opening of the one of said frame and said cover.

### Claim 8 (depends on 7)

The air curtain device as claimed in claim 7, wherein:
said air curtain device further comprises a second adhesive;
said first connecting section of said frame is indented with a groove surrounding said upper opening and applied with said second adhesive, and is formed with a plurality of threaded holes;
said cover has an annular protrusion protruding from a bottom surface thereof and coupled to said groove, and is formed with a plurality of through holes respectively corresponding in position to said threaded holes; and
said air curtain device further comprises a plurality of screwing members respectively extending through said through holes, and respectively and threadedly engaging said threaded holes, so that said cover and said first connecting section are sealingly connected by said second adhesive and said upper opening of said frame is closed.