JP2002267222A - Local exhaust unit and exhaust system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique where layout in an office room can be freely altered, and local exhaustion can be achieved effectively, to reduce the air- conditioning load. SOLUTION: A local exhaust unit 10 adaptable to a free access floor 43 composed of a duct 11, an air suction port 12, a rough dust filter 13, and a sirocco fan 14 is installed at an arbitrary position on the freely accessable floor 43 to utilize an under-floor space 44 of the free access floor 43 as an exhaust chamber.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a local exhaust unit and an exhaust system, and more particularly, to a local exhaust unit and an exhaust system applied to a free access floor used in an office or the like where OA equipment is placed. is there.

[0002]

2. Description of the Related Art As shown in FIG.
In offices and the like where a large number of... Are installed, large-capacity air conditioning equipment is required due to exhaust of contaminated air such as cigarette smoke and heat generated from the OA equipment 46. For this reason, for example, in FIG. 6, the floor of the office is constituted by a free access floor 43 formed by laying a large number of reconfigurable floor blocks. Attempts have been made to install air conditioners near individual OA devices 46 to reduce the air conditioning load.

In the prior art using the floor blowout unit 61, however, the position of the blowout can be freely changed, but the position of the suction port 51 is fixed, and the air conditioning efficiency is somewhat improved. It was not possible to meet the demand for local exhaust, and improvements were required.

Another prior art is disclosed in Japanese Patent Laid-Open No. 1-211111.
In Japanese Unexamined Patent Publication (Kokai) No. 1 (a) and 7 (b), as shown in FIGS.
A suction port 61 is provided in the casing of the A device 46,
A small fan 62 is mounted on the floor below the table on which the OA device 46 is placed, and the air inside the desk is taken as an air passage along with the heat generated from the OA device 46 by taking in the room air from the suction port 61. A technique is disclosed in which the air is supplied to an exhaust duct 65 provided in the underfloor space 44. (FIG. 7 (a)) Further, a cover 64 with an exhaust pipe 63 incorporating a small fan 62 is provided in the OA equipment 46, and the heat generated from the OA equipment 46 together with the indoor air is provided in the underfloor space 44. A technique of feeding the gas into the exhaust duct 65 is disclosed. (Fig. 7 (b))

[0005]

However, Japanese Patent Laid-Open Publication No.
According to the technology of JP-A-211111, local exhaust can be effectively performed and the air-conditioning load can be reduced. Is difficult.

The present invention has been made in view of the above circumstances, and solves the above-mentioned disadvantages of the prior art, can freely change the layout of an office room, and can effectively perform local exhaust air conditioning. It is an object of the present invention to provide a technology capable of reducing a load.

[0007]

In order to achieve the above object, a local exhaust unit according to claim 1 of the present invention is a local exhaust unit adaptable to a free access floor, comprising: a duct; The air inlet is provided at an upper portion, a filter is provided near the air inlet, and an exhaust fan is provided at a lower portion of the duct.

According to a second aspect of the present invention, there is provided a floor suction type exhaust system including a plurality of local exhaust units which can be installed at arbitrary positions on a free access floor provided indoors, and a space under the free access floor. Is configured as an exhaust chamber, and the air sucked by the local exhaust unit is exhausted to the exhaust chamber.

According to the local exhaust unit and the exhaust system according to the present invention, local exhaust can be efficiently performed,
It is also easy to respond to layout changes in the office room.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a local exhaust unit and an exhaust system according to the present invention will be described below with reference to the accompanying drawings. In the drawings, the same members are given the same numbers.

As shown in FIG. 1, a local exhaust unit 10 according to a first embodiment of the present invention includes a light metal or synthetic resin duct 11 forming a unit main body, and an air provided on an upper portion of the duct. The air intake port 12, a coarse dust filter 13 provided in the vicinity of the air intake port 12, and a sirocco fan 14 with a small electric motor 14A provided at a lower portion of the duct are compactly configured, and have a free access floor. It has a structure that can be easily installed on top.

Although the duct 11 has been described as having a structure also serving as the unit body, the duct 11 is provided separately from the unit body.
May be provided.

The filter is not limited to the dust filter but may be another filter, and is appropriately selected according to the local environment.

As a modification of the local exhaust unit 10 according to the first embodiment of the present invention, as shown in FIG.
The air suction port 12 can be finely adjusted to an arbitrary position. Further, as another modified example, as shown in FIG. 3, a sirocco fan 14 with a small electric motor 14A for exhaust is turned on / off in a duct 11 forming a unit body.
A switch 31 for switching off is provided, and the operation thereof is turned on / off as needed to provide an energy saving effect.

An air conditioner using an exhaust system provided with a local exhaust unit 10 according to a second embodiment of the present invention, as shown in FIG. A free access floor 43 which can be dropped and removed is provided, and air supply ports 42, 42 are attached to a ceiling 52 thereof. An air supply duct 48 communicates with the air supply ports 42, 42, and an air conditioner 41 communicates with the air supply duct 48. The room 47 has a desk 5
3 and OA equipment 46 are arranged. In the vicinity of the desk 53 and the OA equipment 46, and other positions where local exhaust is desired, local exhaust units 10, 10,... Having an intake port on the upper side and an exhaust port on the lower side are arranged on the free access floor 43. It communicates with an exhaust chamber using the underfloor space 44. The exhaust chamber communicates with an exhaust duct 49, and the exhaust duct 49 is connected to an exhaust fan 45. On the other hand, the room 47 communicates with the air conditioner 41 through a return air duct 50 communicating with the return air port 54.

The operation of the air-conditioning equipment using this exhaust system is as follows. Air conditioned by the air-conditioner 41 is supplied from the air supply ducts 48 through the air supply ports 42, 42 to the room 47.
Is downflowed to The smoke from the tobacco and the heat from the OA equipment 46 are sucked together with the indoor air from the air inlets of the local exhaust units 10, 10,... The air is exhausted to the exhaust chamber using the space 44 and the exhaust duct 4
The air is discharged from the exhaust fan 45 to the outside via 9. The remaining air in the room 47 is returned to the air conditioner 41 from the return air port 54 via the return air duct, and is returned.

According to this embodiment, since the local exhaust unit 10 can be disposed at an arbitrary position in the room 47, necessary local exhaust can be efficiently performed.

The exhaust system using the local exhaust unit 10 according to the third embodiment of the present invention, as shown in FIG. 5, has a local exhaust unit 10 (FIG. 5) provided with an on / off switch 31. In the free access floor 43 of the room 47 in which 3) is installed, a pressure-reducing suction port 51 that opens and closes according to ON / OFF of the local exhaust unit 10 is provided. In the third embodiment, when the operation of all or a part of the plurality of local exhaust units 10, 10,... Is off, the pressure-reducing suction port 51 is opened to release the air in the room 47 into the underfloor space 44.
To the exhaust chamber using Thus, according to the third embodiment, any of the local exhaust units 1
Even if 0 is turned off, the air volume in the room 47 can be balanced.

[0019]

As described above, according to the first aspect of the present invention,
According to the local exhaust unit, since the local exhaust unit is grouped as a unit for the free access floor, the local exhaust unit can be set at an arbitrary position on the free access floor to perform the local exhaust efficiently, and also in the office room. It is easy to respond to layout changes.

According to the floor suction type exhaust system of the second aspect of the present invention, a plurality of local exhaust units which can be installed at arbitrary positions on the free access floor are provided, and a space under the floor of the free access floor is used as an exhaust chamber. As a result, the underfloor exhaust duct becomes unnecessary, the local exhaust can be efficiently performed, and it is easy to cope with a layout change in the office room.

[Brief description of the drawings]

FIG. 1 is a front view (a) and a side view (b) showing an embodiment of a local exhaust unit according to the present invention.

FIG. 2 is a front view (a) and a side view (b) showing a modification of the embodiment of the local exhaust unit according to the present invention.

FIG. 3 is a front view showing another modification of the embodiment of the local exhaust unit according to the present invention.

FIG. 4 is a schematic view showing an embodiment of a floor suction type exhaust system according to the present invention.

FIG. 5 is a schematic view showing another embodiment of the floor suction type exhaust system according to the present invention.

FIG. 6 is a schematic diagram showing a conventional exhaust system.

FIG. 7 is a schematic view showing another conventional exhaust system.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Local exhaust unit, 11 ... Duct, 12 ... Air inlet, 13 ... Dust filter, 14 ... Sirocco fan, 31 ... Switch, 43 ... Free access floor, 4
4: Underfloor space, 51: Suction port for pressure relief

Claims (3)

[Claims] 1. A local exhaust unit adaptable to a free access floor, comprising: a duct; an air inlet provided at an upper part of the duct; a filter provided near the air inlet; A local exhaust unit, comprising: an exhaust fan provided at a lower portion of the local exhaust unit. 2. A free access floor is provided in a room, and an underfloor space of the free access floor is formed as an exhaust chamber. A local exhaust unit having a port is installed at a necessary place on the free access floor, and air sucked from a suction port of the local exhaust unit is exhausted from the exhaust port of the local exhaust unit to the exhaust chamber. And floor suction type exhaust system. 3. The local exhaust unit is provided with a switch for switching on / off of an exhaust fan, and an evacuation switch provided on the free access floor according to on / off of an on / off switch of the exhaust fan. The floor suction type exhaust system according to claim 2, wherein the suction port is opened and closed.