JPH0448420Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an air conditioning intake/exhaust duct structure mainly used in an air conditioner for buildings, etc.

[Background technology]

In an air conditioner for a building, it is necessary to connect to the air conditioner an intake duct that guides outside air to the air conditioner, and an exhaust duct that discharges air after conditioning the room to the outside. Since these intake ducts and exhaust ducts must be installed separately in the building and connected to the air conditioner, the installation work is complicated.

Particularly recently, there has been a trend to shift from central air conditioning systems to individual distributed air conditioning systems, and multiple air conditioners are installed corresponding to each air conditioning zone. Therefore, intake ducts and exhaust ducts must be connected to each of these air conditioners separately, and the number of required piping increases accordingly. Furthermore, if these intake ducts and exhaust ducts have a double pipe structure, the piping construction will be simple, but the production cost of the double pipes will increase.

The present invention takes the above facts into account, and aims to provide an air conditioning intake/exhaust duct structure that is inexpensive and easy to construct in terms of material cost and construction.

[Summary and operation of the device]

The present invention has a flexible inner duct that has a positive pressure inside and pumps air therein, and a hard outer duct that is placed outside the inner duct and sends air under suction between the inner duct and the outer periphery of the inner duct. It is characterized by

Therefore, in this invention, the inner duct is made of flexible cloth.
It can be manufactured from synthetic resin, etc., making it inexpensive.
Installation of this duct is extremely simple, simply by attaching the outer duct to the building.

[Example of idea]

FIG. 1 shows a structure in which a duct structure 12 according to this embodiment is applied to a building 10.

In this building 10, an air conditioner 18 is arranged in a piping space 16 provided in the ceiling of an air-conditioned room 14, and a heat exchanger 20 and a fan 20 are arranged inside. Conditioned air cooled by the heat exchanger 20 and pumped by the fan 22 is supplied to the air conditioned room 14 through a duct 24. Further, a part of the air in the air conditioned room 14 is supplied to the air conditioner 18 again through the return air duct 26.

Furthermore, one end of an intake pipe 28 is connected to the air conditioner 18 , an intake fan 32 is installed in the middle part of this intake pipe 28 inside the machine room 30 , and the other end serves as an outside air intake port 34 outside the building 10 . facing.

Further, an exhaust duct 36 is opened in a part of the air conditioned room 14, and the tip thereof is an exhaust port 48 through a connection box 38, an exhaust pipe 40, a connection box 42, an exhaust duct 44, and an exhaust fan 46, and the exhaust pipe 40, a connection box 42, an exhaust duct 44, and an exhaust fan 46 are connected to the outside. It is designed to exhaust indoor exhaust gas.

As shown in FIG. 2, an intake pipe 28 and an exhaust pipe 40
It is a double tube structure arranged coaxially. This intake pipe 28 is made of a flexible cloth material, synthetic resin material, or the like. Furthermore, this intake pipe 28 is preferably heat resistant and flame retardant.

The exhaust pipe 40 is a steel pipe structure used for general exhaust ducts, and a retainer 50 is attached at an appropriate position to hold the intake pipe 28. That is, the retainer 50 has a stay 54 protruding from the outer periphery of a support pipe 52 that houses and supports the intake pipe 28, and the tip of the stay 54 is fixed to the inner periphery of the exhaust pipe 40.
A plurality of 0 are provided at predetermined intervals in the longitudinal direction of the exhaust pipe 40, whereby the intake pipe 28 and the exhaust pipe 40 can be reliably formed into a double pipe structure even when the intake pipe 28 has a flexible structure.

The connection boxes 38 and 42 are similarly shaped.
A flange 56 protrudes from one end of the exhaust pipe 40 so that the end of the exhaust pipe 40 can be fixed thereto.
The connection between the exhaust pipe 40 and the connection boxes 38, 42 may be achieved by providing a flat flange extending in the radial direction at the axial end of the exhaust pipe 40 and fastening it to the connection boxes 38, 42.

On the other hand, the intake pipe 28 passes through the connection box 42 and is inserted into the exhaust pipe 40, and further passes through the connection box 42 and is guided to the air conditioner 18. Preferably, a suitable sealing material is provided between the through hole of the intake pipe 28 provided in the wall of the connection box 38 and the exhaust pipe 40, and the outer periphery of the intake pipe 28.

Note that the intake pipe 28 may be made of a flexible cloth material only for the exhaust pipe 40 and the inner portions of the connection boxes 38, 42, and the rest may be made of a hard material.

By manufacturing in advance a double pipe in which the intake pipe 28 is attached to the exhaust pipe 40 in this way, all that is required is to connect the exhaust pipe 40 to the connection boxes 38 and 42, which greatly simplifies piping construction. become.

Note that a control valve 60 is attached to the middle part of the exhaust duct 44 and the middle part of the intake pipe 28 leading to the air conditioner 18.

In this embodiment, which is configured in this way, it is only necessary to construct a double pipe consisting of the exhaust pipe 40 and the intake pipe 28 over a long distance inside the building 10. There is no need for separate construction, and the work is extremely simple.

Also, when the air conditioner 18 operates, the intake fan 32
outside air is sent into the intake pipe 28, the inside of the intake pipe 28 is made positive pressure, and the outside air is sent into the air conditioner 18. On the other hand, a part of the air supplied to the air conditioned room 14 returns to the air conditioner 18 through the return air duct 26, but the other part is inside the exhaust pipe 40 and is exhausted through the outside of the intake pipe 28. It is discharged to the outside while being sucked by the fan 46. Therefore, the inside of the intake pipe 28 is under positive pressure, and the inside of the exhaust pipe 40 is under negative pressure, so even though the intake pipe 28 has a flexible structure, it is always maintained in an expanded state and the outside air is reliably air-conditioned. It can be sent to machine 18.

[Effect of idea]

As explained above, the present invention consists of a flexible inner duct that has a positive pressure inside and pumps air under pressure, and a rigid outer duct that is placed outside the inner duct and sends air under suction to the outer periphery of the inner duct. Since the inner duct has a flexible structure that does not need to be strengthened, the inner duct can have a simple and inexpensive structure, and has the excellent effect of being easy to construct.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an air conditioner for a building to which the present invention is applied, and FIG. 2 is an exploded perspective view showing a double pipe structure. 10...building, 18...air conditioner, 28...intake pipe, 40...exhaust pipe.

Claims (1)

[Scope of utility model registration request] An air-conditioning suction system having a flexible inner duct that has a positive pressure inside and pumps air, and a hard outer duct that is placed outside the inner duct and sends air under suction between the inner duct and the outer periphery of the inner duct. Exhaust duct structure.