JPH11153331A - Casing for air handling unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve productivity, by a method wherein a casing for an air conditioner is formed by attaching a plurality of sheets of exterior panels to a frame consisting of a plurality of pieces of frame members while pinching a packing, while recessed grooves are formed at the middle part of abutting surface of the packing against the frame members to clamp exterior panels to the frame members by drilling screws. SOLUTION: A casing for air handling unit is constituted of a frame, formed by assembling a plurality of pieces of frame members 1, a plurality of sheets of exterior panels 3 and packings 4, pinched between the frame and the panels. In this case, a recessed groove 6 is formed at the middle part of the abutting surface 5 of the packing against the frame member 1 across the whole length of the frame member 1 while a small V-groove 9 is formed at the central part of the recessed groove 6 across the whole length of the same. Subsequently, drilling screws 8 are screwed to the recessed groove 6 from the side of the exterior panel 3. According to this method, the exterior panel 3 is clamped to the frame member 1 while pinching the packing 4 whereby the packing 4 is compressed intensively in the part R at the outside of the recessed groove 6 and, therefore, sealing property is improved compared with a case when the packing is compressed by the same clamping force but the packing abutting surface 5 against the frame member 1 is a flat surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a casing for an air handling unit.

[0002]

2. Description of the Related Art A conventional casing for an air handling unit uses an angle member as a frame member, and joins and assembles the frame member by welding to form a frame, and attaches an exterior plate to the frame.

[0003]

However, such a casing has a problem in that productivity is poor, for example, the weight is large and the transportation is troublesome and a skilled welding worker is required.
Therefore, an object of the present invention is to provide a casing for an air handling unit that solves the above problems.

[0004]

In order to achieve the above object, a casing for an air handling unit according to the present invention comprises a frame formed by assembling a plurality of frame members, and a packing between a plurality of exterior panels. The casing for an air conditioner attached by using a steel plate as the material of the frame material, forming a concave groove extending in the longitudinal direction in the middle of the packing contact surface of the frame material, the frame material and The outer panel is fastened with a drilling screw. Further, a small V groove for positioning the drilling screw is formed in the concave groove portion. Further, a plate wall surrounding the drilling screw projecting from the frame material by screwing is formed on the frame material.

[0005]

FIG. 1 shows an embodiment of a casing for an air handling unit according to the present invention, in which a heat exchange coil and a blower (not shown) are provided.
The casing includes a frame 2 formed by assembling a plurality of frame members 1, 1, 1,.
, 3 and so on, with packings 4, 4, 4.

As shown in FIGS. 2 and 3, the frame member 1 is formed by roll forming or the like using a steel plate as a raw material. If a corrosion-resistant material such as galvalume is used for the steel plate, the time-consuming and corrosion-resistant coating performed on the angle material frame becomes unnecessary, and the productivity can be improved.

In the middle part of the packing contact surface 5 of the frame material 1,
The groove 6 extending in the longitudinal direction is formed over the entire length to improve the strength and rigidity of the frame material 1. Further, a small V groove 9 extending in the longitudinal direction is formed at the center of the concave groove portion 6 over the entire length. The concave grooves 6 include V-shaped, U-shaped and other cross-sectional shapes other than those in the illustrated example. The band-shaped packing 4 is formed of an elastic body such as rubber which is easily deformed, and is formed so as to contact substantially the entire packing contact surface 5 of the frame material 1.

[0008] From the exterior panel 3 side to the concave groove 6 of the frame material 1,
Screw the drilling screw 8 that does not require pilot hole processing. At this time, by aligning the sharp tip of the drilling screw 8 with the small V-groove 9, the displacement of the screw can be prevented. When the frame material 1 and the exterior panel 3 are tightened with the packing 4 interposed therebetween, the packing 4 is strongly compressed at a portion R outside the groove 6, and the packing material of the frame material 1 is pressed with the same tightening force. The sealing performance is improved as compared with the case where the entire surface of the contact surface 5 is a flat surface (see FIG. 4).

The frame member 1 has seams 7, 7 formed by folding back both long sides thereof, and further has its tip bent to surround a drilling screw 8 projecting from the frame member 1 by screwing. The plate wall portion 10 to be inserted is integrally formed over the entire length to improve strength and rigidity.

[0010]

According to the first aspect of the present invention, the concave groove portion 6 locally increases the contact pressure between the frame member 1, the packing 4, and the exterior panel 3, thereby reliably preventing gas-liquid intrusion. The strength and rigidity of the material 1 can be increased. Pre-drilling is not required, anyone can easily assemble just by screwing, which can improve productivity and reduce the number of assembly steps. Since a steel plate is used as the material of the frame member 1, it is lightweight, easy to carry and handle, and is suitable for a so-called modular air hank that can be assembled on site.

According to the second aspect of the present invention, the positioning of the screw with respect to the frame member 1 can be easily performed, the screwing operation can be easily performed, and the productivity and quality can be improved.

According to the third aspect of the present invention, the plate wall portion 10 can also be used as a safety protection cover and as a reinforcement, so that a sharp end of the drilling screw 8 is not hurt by a sharp end of the drilling screw 8 during assembly work or maintenance work. And for example, 1 mm
Frame material 1 with high strength and rigidity even with a thin steel plate material
Can be obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is an enlarged perspective view of a main part.

FIG. 3 is an enlarged sectional view of a main part.

FIG. 4 is a graph showing a contact surface pressure distribution between a frame member and a packing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Frame material 2 Frame 3 Exterior panel 4 Packing 5 Packing contact surface 6 Concave groove part 8 Drilling screw 9 Small V groove 10 Plate wall part

[Procedure amendment]

[Submission date] November 28, 1997

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Fig. 1

[Correction method] Change

[Correction contents]

FIG.

[Procedure amendment 2]

[Document name to be amended] Drawing

[Correction target item name] Figure 2

[Correction method] Change

[Correction contents]

FIG. 2

[Procedure amendment 3]

[Document name to be amended] Drawing

[Correction target item name] Figure 3

[Correction method] Change

[Correction contents]

FIG. 3

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Asao Sakaguchi 4-2-1-15, Hiroro-cho, Chuo-ku, Osaka-shi, Osaka 5th floor of Yodoko No. 2 Building Kimura Koki Co., Ltd.

Claims (3)

[Claims] 1. An air conditioner casing comprising a frame 2 formed by assembling a plurality of frame members 1 and a plurality of exterior panels 3 with packing 4 interposed therebetween.
A steel plate is used as the material of the frame member 1, and a concave groove 6 extending in the longitudinal direction is formed in an intermediate portion of the packing contact surface 5 of the frame member 1, and the frame member 1 and the exterior panel 3 are drilled with screws 8. A casing for an air handling unit, characterized in that the casing is tightened. 2. A casing for an air handling unit according to claim 1, wherein a small V-groove for positioning a drilling screw is formed in the concave groove. 3. The casing for an air handling unit according to claim 1, wherein a plate wall portion surrounding the drilling screw projecting from the frame member by screwing is formed in the frame member.