JP2003172021A - Ceiling inspection hole-integrated filter unit and execution method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simplify work for retrofitting a filter unit into a space in a ceiling, enable uniform work, reduce waste, eliminate work for restoring the ceiling, and reduce costs. <P>SOLUTION: This filter unit is equipped with: a box-shaped unit body part; at least one inflow piping connecting port and at least one outflow piping connecting port, which are provided in the unit body part; a jig for fixing piping around the piping connecting ports inside the unit body part; a filter which is arranged inside of the unit body part so as to inhibit the inflow and outflow sides of the piping connecting ports from communicating directly with one another; and a door for inspection, which is openably/closably provided on the downside of the unit body part in such a manner as to be flush with a ceiling surface. The filter unit can be inserted midway through an air- conditioning duct, and the door for the inspection can be opened/closed from the ceiling surface. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter unit for air conditioning, and more particularly to a ceiling which is retrofitted in the middle of an air conditioning duct installed in a space above the floor between a floor slab and a ceiling board. The present invention relates to an inspection port integrated filter unit and a construction method thereof.

[0002]

2. Description of the Related Art When a duct is installed in a space above the ceiling, it is necessary to install a filter unit in the middle of the duct as a retrofit for repairing a building. The conventional post-installation method is carried out in the steps shown in FIGS. FIG. 6A shows that the duct 16 in the space above the ceiling is cut off midway to connect the filter unit 70 and the tapered connection duct 8 to each other.
6 is a plan view showing a state in which 0s are connected, and FIG. 6B is a vertical cross-sectional view showing a part 40 in which a part of the ceiling board 12 is disassembled and cut out.
C is a vertical cross-sectional view showing a state in which two workers are working on the scaffold 50, and FIG. 6D is a vertical cross-sectional view showing a state in which the filter is replaced with a filter unit that is retrofitted.

First, as shown in FIGS. 6A and 6B, a part of the ceiling board 12 is disassembled and cut out so that the filter unit 70 and the connection duct 80 can be inserted.
The notch 40 is usually about 2 m ² . Next, FIG. 6C
As shown in FIG.
The upper body is introduced into the ceiling space from 0, and a part of the existing air conditioning duct 16 is cut and removed over a predetermined length. Next, the anchor 62 is driven on the lower surface of the floor slab 10 on the upper floor, and the suspension bolts 64 and 66 are hung down to suspend the filter unit 70 and the connection duct 80, and then the air conditioning duct 16 is cut. The end part and the connection duct 80 are connected (two positions before and after). The worker withdraws from the ceiling.

Next, as shown in FIG. 6D, the ceiling cutout 40 is restored and repaired, and the inspection door 82 of the filter unit is installed on the ceiling board 12, and the inspection door 82 is installed.
The filter 72 can be replaced by opening and closing. Through the above steps, a filter unit is retrofitted on the ceiling.

However, in this method, since the ceiling board is cut out over a large area, a large amount of waste is required, and ceiling restoration work is required, and when the distance between the duct upper surface and the floor slab lower surface is small, The size and shape of the filter unit is limited, the shape of the connecting duct is complicated, and the like, which makes uniform work difficult and requires a large number of workers, resulting in high cost.

Japanese Unexamined Patent Publication No. 10-170026 “Air Conditioning System” proposes a structure for improving maintenance such as cleaning and replacement of a filter on the ceiling.

[0007]

SUMMARY OF THE INVENTION The object of the present invention is to simplify the work of retrofitting a filter unit in the space above the ceiling, enable uniform work, reduce waste,
It is to reduce the cost by eliminating the ceiling restoration work.

[0008]

In order to achieve the above-mentioned object, in the first aspect of the present invention, there is provided an air-conditioning duct installed in the space above the floor between the floor slab and the ceiling board. Provided is a filter unit integrated with a ceiling inspection port that can be inserted later on the way. The filter unit includes a box-shaped main body, at least one inflow pipe connection port and at least one outflow pipe connection port provided in the main body, and a plurality of pipe connection ports around the inside of the main body. A jig for fixing pipes, a filter arranged inside the main body part so as to prevent direct communication between the inflow side and the outflow side of the plurality of pipe connection ports, and a bottom part of the main body part. It is characterized in that it is provided with an inspection door provided on the same side as the ceiling surface in an openable and closable manner, can be inserted in the middle of an air conditioning duct, and the inspection door can be opened and closed from the ceiling surface. .

[0009]

With the ceiling-inspection-integrated filter unit according to the present invention, since the inspection door integrated with the filter is exposed on the ceiling surface, the operator does not have to put the upper body in the space above the ceiling. The filter can be removed from the filter unit simply by extending the arm, and the work of cleaning the filter and setting it in the original position again or replacing the filter can be performed quickly and easily.
This greatly improves maintainability. In addition, since only the ceiling inspection opening size needs to be cut out on the ceiling board, less waste is generated, no ceiling restoration work is required, and the size of the filter unit is large even when the distance between the duct upper surface and the floor slab lower surface is small. If the flexible duct (bellows pipe) is used for the connection duct without restricting the shape of the sheath, uniform work can be performed, and since the work can be performed by a small number of workers, the cost can be significantly reduced.

In the second aspect of the present invention, a ceiling inspection port integrated filter unit is retrofitted and installed in the middle of an air conditioning duct installed in the space above the ceiling between the floor slab on the upper floor and the ceiling board. To provide a construction method. In this construction method, first, a box-shaped main body portion, at least one inflow pipe connection port and at least one outflow pipe connection port provided in the main body portion, and the plurality of pipes inside the main body portion. A jig for fixing pipes around the connection port, a filter arranged inside the main body portion so as to prevent direct communication between the inflow side and the outflow side of the plurality of pipe connection ports, and the main body Prepare a ceiling-inspection-integrated filter unit that has an opening and closing inspection door on the lower side of the section. Next, a part of the ceiling board is cut out according to the ceiling inspection port size of the filter unit, and a part of the existing air conditioning duct is cut and removed over a predetermined length,
Connect one end of a pipe such as a flexible duct to the cut end of an existing air conditioning duct, install the filter unit in the space above the ceiling, and fix the other end of the pipe such as the flexible duct to the above. The jig is connected to the pipe connection port of the filter unit, and the filter is placed in the filter unit.

Before and after installing the filter unit in the space above the ceiling, it is possible to add a step of stretching the board at the door of the ceiling inspection port. By using such a method, the work of retrofitting the filter unit in the space above the ceiling is simplified, uniform work is possible, and cost reduction is achieved. Hereinafter, preferred embodiments according to the present invention will be described with reference to the accompanying drawings.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a state in which a ceiling inspection port-integrated filter unit 20 according to the present invention is arranged in a space 14 behind a floor between a floor slab 10 and a ceiling board 12. FIG. 2 is a plan view. As shown in FIGS. 1 and 2, the filter unit 20 includes a box-shaped main body portion 22, a pair of pipe connection ports 46 and 48 provided in front and rear of the main body portion 22, and the inside of the main body portion 22. Being said 1
The filter 28 is arranged so as to prevent the pair of pipe connection ports 46 and 48 from directly communicating with each other, and the inspection door 30 provided on the lower side of the main body 22 in an openable and closable manner.

3A to 3D show a step of retrofitting the air conditioning duct in the middle using the ceiling inspection port integrated filter unit according to the present invention. FIG. 3A is a vertical cross-sectional view showing the air-conditioning duct 16 and the cutout portion 40 of the ceiling board 12 in the space above the floor slab 10 on the upper floor, and FIG.
B is a vertical cross-sectional view of a state where an operator rides on the scaffold 50, FIG. 3C is a vertical cross-sectional view of a state in which the filter unit is suspended, and FIG. 3D is a vertical cross-sectional view of a state in which construction is completed.

First, as shown in FIG. 3A, a part of the ceiling board 12 is disassembled and cut out according to the size of the ceiling inspection port of the ceiling inspection port integrated filter unit 20 according to the present invention. The notch 40 is, for example, 450 × 450 m
Make a square of about m. Next, as shown in FIG. 6C, an operator rides on the scaffold 50 to let the upper body enter the ceiling space through the notch 40, and cuts and removes a part of the existing air conditioning duct 16 over a predetermined length. To do. The cut length S from the center of the notch 40 is, for example, about 800 mm on both sides. The height H from the ceiling surface of the duct 16 is generally 5
It is about 00 mm. Next, as shown in FIG. 3B, the cut ends 16a and 16b of the cut duct 16 are connected to one ends of flexible ducts (bellows tubes) 42 and 44 having a predetermined length, and the other end of the flexible duct is connected. The pipe connecting joints 24 and 26 are attached to the ends. Alternatively, the joints 24 and 26 may be attached to one end of the flexible ducts 42 and 44 in advance.

Next, as shown in FIG. 3C, an anchor 52 is placed on the lower surface of the floor slab 10 on the upper floor, and a hanging bolt 54 is attached.
Is suspended so that the filter unit 20 is suspended, and then the worker withdraws from the ceiling. Next, the pipe connecting joints 24 and 26 attached to the ends of the flexible ducts 42 and 44 and the pipe connecting ports 46 and 48 (two positions before and after) of the filter unit are connected by a connecting jig.
This connecting work can be performed by opening the inspection door 30 and allowing the worker to extend the arm and lock the clamp 27. The diameter of the pipe connecting joints 24, 26 will be adjusted to the duct diameter, but generally 150
It is about 250 mm. Instead of suspending the filter unit 20 from the floor slab 10 on the upper floor, the filter unit 20 may be fixed by using a lightweight steel frame base material. A ceiling board is put on the ceiling inspection door 30 to improve the visibility (look). Before installing the filter unit in the space above the ceiling, the ceiling board may be attached to the door 30 of the ceiling inspection port.

As a result, the inspection door 30 of the filter unit is exposed at the cutout portion of the ceiling board 12, and the filter 28 can be replaced by simply opening and closing the inspection door 30. If the filter 28 is inserted into the filter mounting frame 29, it means that the filter unit has been retrofitted on the back of the ceiling.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 4 and 5 show a concrete embodiment of a filter unit 20 with an integrated ceiling inspection port according to the present invention, in which the inspection door is removed to show the internal structure. The inspection door can be attached to and detached from the main body portion 22 by a hand screw 31. Further, in FIG. 5, the element of the filter 28 is removed to show the internal structure. As described above, the filter unit 20 includes a box-shaped main body 22, a pair of pipe connection ports 46 and 48 provided in front and rear of the main body 22, and one-touch provided near the respective pipe connection ports. Type clamp 27, a filter 28 arranged inside the main body portion 22 so as to prevent the pair of pipe connection ports 46 and 48 from directly communicating with each other, and a lower side of the main body portion 22. An opening / closing door 30 for inspection (not shown) is provided.

Flexible ducts 42 and 44 (only one of which is shown) are connected to the pair of pipe connection ports 46 and 48 via pipe connection joints 24 and 26 by using one-touch type clamps 27, respectively. The ceiling inspection port integrated filter unit according to the present invention can be freely connected to an existing ceiling duct by changing the size of the pipe connection port and the size of the flexible duct.

[0019]

As described in detail above, according to the filter unit with a ceiling inspection port of the present invention, the inspection door integrated with the filter is exposed on the ceiling surface.
The operator can remove the filter or element from the filter unit simply by extending the arm without putting the upper body in the space above the ceiling, and cleaning the element and setting it again in its original position or replacing the filter. Can be performed quickly and easily, and the maintainability is significantly improved. Further, since only the ceiling inspection opening size needs to be cut out in the ceiling, the amount of waste is reduced, and the ceiling restoration work is unnecessary. Further, even if the distance between the upper surface of the duct and the lower surface of the floor slab is small, the size and shape of the filter unit are not limited, and if a flexible duct is used for the connecting duct, uniform work becomes possible, and with a small number of workers. Since it can be installed, the cost can be significantly reduced. Further, by using the construction method of the present invention, the work of retrofitting the filter unit in the space above the ceiling is simplified, uniform work is possible, less waste is generated, and cost reduction is achieved. The technical effect is extremely remarkable.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a state where a ceiling inspection port integrated filter unit according to the present invention is installed behind a ceiling.

FIG. 2 is a plan view of the ceiling inspection port integrated filter unit according to the present invention.

FIG. 3 is a schematic view showing a construction method of the ceiling inspection port integrated filter unit according to the present invention.

FIG. 4 is a perspective view showing a preferred embodiment of a filter unit integrated with a ceiling inspection port according to the present invention.

FIG. 5 is a perspective view showing a preferred embodiment of a filter unit with a ceiling inspection port according to the present invention.

FIG. 6 is a schematic view showing a construction method of a conventional back ceiling type filter unit.

[Explanation of symbols]

10 floor slabs 12 ceiling board 14 Space above the ceiling 16 Air conditioning duct 20 Ceiling inspection port integrated filter unit 22 Body 24,26 Pipe joint 28 filters 29 Filter mounting frame 30 Inspection door 42,44 flexible duct 46, 48 Piping connection port

Claims (2)

[Claims] 1. A filter unit integrated with a ceiling inspection port, which is inserted in the middle of an air conditioning duct installed in a space above the ceiling between a floor slab on the upper floor and a ceiling board, and has a box-shaped body. At least one inflow pipe connection port and at least one outflow pipe connection port provided in the main body, a jig for fixing pipes around the plurality of pipe connection ports inside the main body, A filter disposed inside the portion to prevent direct communication between the inflow side and the outflow side of the plurality of pipe connection ports; A ceiling inspection port integrated filter unit, comprising: an inspection door provided, which can be inserted in the middle of an air conditioning duct, and which can be opened and closed from the ceiling surface. 2. A method of installing a filter unit integrated with a ceiling inspection port in the middle of an air conditioning duct installed in a space above the floor between a floor slab on the upper floor and a ceiling board, which is a box type A main body and at least one provided on the main body
A plurality of inflow pipe connection ports, at least one outflow pipe connection port, a jig for fixing pipes around the plurality of pipe connection ports inside the main body portion, and a plurality of jigs arranged inside the main body portion. Ceiling inspection port integrated filter unit including a filter arranged so as to prevent direct communication between the inflow side and the outflow side of the pipe connection port, and an inspection door provided on the lower side of the main body part to open and close. Prepare a cutout part of the existing air conditioning duct by cutting out a part of the ceiling board according to the size of the ceiling inspection opening of the filter unit, and cutting and removing a part of the existing air conditioning duct. Connect one end of pipe such as flexible duct to the section, install the filter unit in the space above the ceiling, and use the jig to fix the other end of the pipe such as flexible duct. The connected to the pipe connecting port of the filter unit, the construction method of a ceiling access door integrated filter unit in which the filter is disposed in the filter unit, characterized in that it consists of more steps.