JP4761793B2 - Exhaust duct and external air conditioner provided with the exhaust duct - Google Patents

Description

  The present invention relates to an exhaust duct that can maintain the air conditioning performance without causing a short circuit to the intake hood and that can be easily constructed while having a good fit.

Some air conditioning systems include an external air conditioner, and an example of such an external air conditioner is shown in FIGS. Thus, the inside of the housing 1a of the external air conditioner 1 is partitioned by the partition plate 1b to form the first chamber 2 and the second chamber 3 . In the following description, the first chamber 2 is simply referred to as the chamber 2, and the second chamber 3 is simply referred to as the chamber 3.

  An intake hood 5 is attached to the intake port 4 provided on one end side of the chamber 2 so that fresh air A, which is outside air, can be drawn from the lower end opening side and introduced into the chamber 2. On the other end side, there is provided an air supply port 6 for supplying the air A supplied in the chamber 2 to the air conditioner side (not shown).

  On one end side of the chamber 3 (the same side as the side where the air supply port 6 of the housing 1a is provided), a part of the return air Ar which has been returned from the air-conditioned space and has not circulated to the air-conditioner side is introduced as exhaust. A return air port 7 is provided, and an exhaust port 8 is provided on the other end side of the chamber 3 (on the same side as the side where the intake port 4 of the housing 1a is provided) so as to be located on the side of the housing 1a. An exhaust hood 9 is provided at the exhaust port 8 so as to exhaust the exhaust Ae downward.

  In the chamber 2, for example, the air flow adjustment damper 10 that can be adjusted in opening degree and attached to the intake port 4 part from the upstream side to the downstream side in the flow direction of the air A, and the air A by winding the cloth. Auto roll filter 11 for removing dust inside, steam coil 12 for preheating, steam inlet 13a and steam drain outlet 13b connected to steam coil 12, cold water coil 14 and hot water coil arranged close to each other 15, a steam humidifier 16, and an intake fan 17 whose discharge port is positioned at the air supply port 6 are arranged.

  In the chamber 3, for example, a return air flow rate adjustment damper 18 which is attached to the return air port 7 and can be adjusted in opening degree from the upstream side to the downstream side in the flow direction of the return air Ar, and a method of winding the cloth Then, an auto roll filter 19 for removing dust in the return air Ar and an exhaust fan 20 in which the discharge port 20a is positioned at the exhaust port 8 and connected to the exhaust hood 9 are arranged.

  In the housing 1a, the total heat is located on the downstream side in the air A flow direction from the steam coil 12 across the chambers 2 and 3, and is located on the upstream side in the return air Ar flow direction from the exhaust fan 20. The exchanger 21 is disposed so as to be rotationally driven by a driving device (not shown). The total heat exchanger 21 is an air conditioning heat exchanger that simultaneously exchanges sensible heat and latent heat of the air A and the return air Ar. Further, the flow direction of the air A in the chamber 2 is opposite to the flow direction of the return air Ar in the chamber 3. In FIG. 5, 31 and 32 are partition plates.

  As shown in FIGS. 5 and 6, the opening 5a of the intake hood 5 and the opening 9a of the exhaust hood 9 are both provided at the lower ends of the intake hood 5 and the exhaust hood 9 and open downward. As shown, they are arranged close to each other with a phase difference of 90 degrees in plan view. 5 is a bird net provided in the opening 5a of the intake hood 5, and 23 in FIG. 6 is a bird net provided in the opening 9a of the exhaust hood 9.

  Explaining the air conditioning, the air A sucked into the intake hood 5 from the opening 5a during cooling is flow-adjusted by the air flow adjusting damper 10 and introduced into the chamber 2, and dust is removed by the auto roll filter 11. After that, in the total heat exchanger 21 that is rotationally driven, heat and water vapor are exchanged with the return air Ar on the chamber 3 side, and cooled and dehumidified. The air A cooled and dehumidified in the total heat exchanger 21 is primarily cooled in the cold water coil 14 and the relative humidity increases. Thus, the air A, which has been cooled and whose relative humidity has increased, is supplied to the air conditioner side by the intake fan 17.

  In addition, a part of the return air Ar that has been cooled and discharged from the air-conditioned space (not shown) and that has not been circulated to the air conditioner is introduced into the chamber 3 with the flow rate adjusted by the return air flow adjustment damper 18. The dust is removed by the auto-roll filter 19 and then fed to the total heat exchanger 21, where heat and water vapor are exchanged with the air A on the chamber 2 side in the total heat exchanger 21 and heated. As the absolute humidity rises, the exhaust fan 20 exhausts the exhaust Ae from the opening 9a of the exhaust hood 9 to the lower outside.

  Even during heating, the flow of air A and return air Ar is the same as during cooling, but the air A introduced into the chamber 2 is heated by the return air Ar on the chamber 3 side in the total heat exchanger 21, and Heating is performed in the hot water coil 15. The return air Ar introduced into the chamber 3 is exhausted in the total heat exchanger 21 by heating the air A on the chamber 2 side. The preheating steam coil 12 and the steam humidifier 16 are appropriately used when necessary during air conditioning.

  In the external air conditioner 1, an exhaust elbow 24 of 60 degrees downward as shown in FIG. 8 may be provided. In FIG. 8, reference numeral 25 denotes a bird net provided at the lower end of the exhaust elbow 24.

In addition, although there is no prior art document information directly indicating an intake hood, an exhaust hood, or an exhaust elbow of an external air conditioner, there are Patent Documents 1 and 2 as reference prior art document information indicating a hood and a duct.
JP-A-7-233987 Japanese Patent Laid-Open No. 9-14740

  In the external air conditioner 1, since the flow directions of the air A and the return air Ar are opposite, the intake position of the air A and the exhaust position of the return air Ar are on the same side in the longitudinal direction of the housing 1a in the external air conditioner 1. It becomes. For this reason, when the opening 5a that is the intake port of the intake hood 5 is located at a low height near the floor, the exhaust Ae discharged from the opening 9a of the exhaust hood 9 is short-circuited. There is a possibility that the circuit is introduced again into the chamber 2 through the intake hood 5 and the air conditioning performance may be deteriorated. The same applies to the case where the exhaust elbow 24 as shown in FIG. 8 is provided.

  In addition, when the arrangement space is small, the conditions for accommodating the exhaust elbow 24 are severe, and further, when the external air conditioner 1 is large and the exhaust position is high, it is difficult to install the exhaust elbow 24.

The present invention has been made in view of the circumstances described above, with the air conditioning performance can be maintained satisfactorily exhaust to not short circuit to the intake hood, fit the exhaust duct and the was adapted to good and easily construction The object is to provide an external air conditioner with an exhaust duct .

The exhaust duct of the present invention is
A vertical duct body having an exhaust opening at the upper end and a bottom surface at the lower end ;
Provided on the side of the duct body, and connected to the exhaust fan outlet through the exhaust fan, and has a short pipe for introducing the exhaust discharged from the exhaust fan into the duct body. ,
On the upper end portion side in the duct main body, a vertical wall shape that is located at a substantially middle portion in the front-rear direction of the duct main body that is parallel to the axial direction of the discharge port in the exhaust fan and extends in the width direction of the duct main body. As the first guide plate is fixed,
Near the upper edge of the short pipe in the duct body, a substantially horizontal strip-shaped second guide plate extending in the width direction of the duct body is fixed,
The second guide plate is formed with a slight downward slope as it is separated from the short tube side,
The lower end of the first guide plate is substantially located on a straight line connecting the upper end of the duct body on the side away from the short pipe and the lower end of the short pipe throttle part on the discharge port side of the exhaust fan,
The tip of the second guide plate is substantially located on a straight line connecting the upper end of the first guide plate and the lower end of the short tube throttle portion on the discharge port side of the exhaust fan .

In the exhaust duct according to the present invention, the bottom surface of the duct body is inclined downward toward the side away from the short pipe, and rainwater discharge means is provided in the vicinity of the lower end of the inclined surface.

Furthermore, the external air conditioner of the present invention air-conditions the air that is outside air taken in from the outside, the first chamber whose air flow direction is the longitudinal direction,
The second chamber is separated from the first chamber by a partition plate, a part of the supply air supplied from the first chamber to the air-conditioned space is introduced as return air, and the flow direction of the return air is the second direction. And
By reversing the flow directions of the air and the return air, the intake position of the air with respect to the first chamber and the exhaust position of the return air in the second chamber are changed between the first chamber and the second chamber. On the same side in the longitudinal direction in the chamber,
And the exhaust fan is installed so that the axis of the discharge port extends in the horizontal direction on the downstream side in the air flow direction of the second chamber,
An intake position of the air in the first chamber is at a height position close to a floor surface, and the exhaust duct is connected to a discharge port of the exhaust fan.

According to the exhaust duct of the present invention and the external air conditioner provided with the exhaust duct, various excellent effects as described below can be obtained.
I) Since the exhaust is exhausted from the opening at the upper end of the duct body to the outside, even if the opening of the intake hood of the external air conditioner is located near the floor, the exhaust is short-circuited and sucked into the intake hood again Therefore, the air conditioning performance is not hindered.
II) Even when the arrangement space is small, it can be easily arranged by making the duct body vertical, and even if the external air conditioner is large and the exhaust position is high, it can be easily constructed. .
III) Rainwater or the like that has entered the duct body flows along the inclined surface of the bottom surface and is discharged to the outside from the drainage short pipe, and a guide plate is provided in the duct body. It is possible to prevent rainwater entering from the opening of the air from entering the outlet of the exhaust fan.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
1 to 4 show an example of an embodiment of the present invention. In the figure, the same reference numerals as those shown in FIGS. 5 to 7 denote the same parts, and the basic configuration is an exhaust. Except for the part, it is substantially the same as the conventional one shown in FIGS.

  Thus, the feature of the illustrated example is that the exhaust duct 26 that is disposed in the vicinity of the intake hood 5 and connected to the discharge port 20a of the exhaust fan 20 in a plan view is vertically disposed, and the exhaust Ae is disposed in the intake hood. It is the point which enabled it to discharge | emit toward the exterior upper direction so that it may separate from 5 side.

  That is, as shown in FIG. 4, an opening 26b provided with a bird net 27 is formed at the upper end of the rectangular duct body 26a forming the exhaust duct 26, and an exhaust fan in the duct body 26a. A short tube 26 c shaped toward the discharge port 20 a of the exhaust fan 20 is provided on the side portion on the 20 side, and the tip of the short tube 26 c is connected to the discharge port 20 a of the exhaust fan 20.

  The bottom surface 26d of the short pipe 26c and the bottom surface 26d of the duct body 26a in the exhaust duct 26 are directed from the short pipe 26c side to the side opposite to the discharge port 20a of the exhaust fan 20 so that water does not accumulate in these portions. It is formed in a downward slope, and a normally open drainage short pipe 28 is attached to the bottom end of the bottom surface 26d.

The upper end of the duct main body 26a has a vertical wall-shaped first extending substantially in the longitudinal direction of the duct main body 26a (in the axial direction of the discharge port 20a in the exhaust fan 20) and extending in the width direction of the duct main body 26a . The guide plate 29 is fixed, and in the vicinity of the upper edge of the short tube 26c in the duct body 26a, the guide plate 29 extends slightly in the downward direction and extends in the width direction of the duct body 26a as the distance from the short tube 26c increases. A substantially horizontal strip plate-like second guide plate 30 is fixed. The reason why the second guide plate 30 is slightly inclined downward as it moves away from the short tube 26c side is to prevent water from accumulating on the upper surface of the second guide plate 30. In the following description, the first guide body 29 is simply referred to as a guide body 29, and the second guide body 30 is simply referred to as a guide body 30.

  Thus, the lower end of the guide plate 29 is the upper end of the duct body 26a opposite to the side where the short pipe 26c is provided, and the lower end P of the narrowed section end of the short pipe 26c on the discharge port 20a side of the exhaust fan 20. Are substantially located on a straight line L1 connecting the two. Further, the front end of the guide plate 30 and the lower end of the guide plate 29 are at substantially the same height, and a gap is formed between the guide plates 29 and 30 so that the exhaust Ae can pass therethrough. Furthermore, the front end of the guide plate 30 is substantially positioned on a straight line L2 connecting the upper end of the guide plate 29 and the lower end P of the narrow portion 26c of the short pipe 26c on the discharge port 20a side of the exhaust fan 20. This is to prevent rain or the like that has fallen into the duct body 26a from the opening 26b at the upper end from entering the exhaust fan 20 side.

  Also in the illustrated example, the flow of air A and return air Ar during air conditioning is the same as that shown in FIGS. 5 to 7, but the exhaust Ae is discharged upward from the opening 26 b of the duct body 26 a. Even when the opening 5a at the lower end of the intake hood 5 is located near the floor surface, the exhaust Ae is short-circuited and is not sucked into the intake hood 5 again, so that the air conditioning performance is hindered. There is no.

  Further, even when the arrangement space is small, the duct body 26a can be easily arranged by making it a vertical type. Further, even when the external air conditioner 1 is large and the exhaust position is high, it can be easily constructed. Can do.

  Since the guide plates 29 and 30 are provided in the duct body 26a, rainwater or the like that has entered the duct body 26a from the opening 26b is guided by the guide plates 29 and 30 and falls to the bottom surface 26d. Accordingly, rainwater or the like can be prevented from entering the discharge port 20a side of the exhaust fan 20. Rainwater or the like that has dropped onto the bottom surface 26d of the duct body 26a flows down along the inclined surface and is discharged to the outside from the drainage short pipe 28.

Note that the exhaust duct of the present invention and the external air conditioner including the exhaust duct are not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention. It is.

It is side sectional drawing which shows the outline | summary of the external air conditioner of this invention with which the exhaust duct of this invention is applied. It is an II-II direction arrow line view of FIG. It is a III-III direction arrow line view of FIG. It is a longitudinal cross-sectional view which shows the detail of the exhaust duct applied to the external air conditioner of this invention. It is a sectional side view which shows the outline | summary of the external air conditioner to which the conventional exhaust duct is applied. It is VI-VI arrow line view of FIG. It is a VII-VII arrow line view of FIG. It is a side view which shows the example of the conventional exhaust elbow applied to an external air conditioner.

Explanation of symbols

1 room (first room)
1a partition plate
3 rooms (second room)
20 Exhaust Fan 26 Exhaust Duct 26a Duct Body 26b Opening 26c Short Pipe 26d Bottom 28 Drain Short Pipe (Rainwater Discharge Means)
29 Guide plate (first guide plate)
30 guide plate (second guide plate)
L1 straight line L2 straight line
A Air Ar Exhaust P Lower end of throttle part (lower end of short pipe throttle part)

Claims (3)

A vertical duct body having an exhaust opening at the upper end and a bottom surface at the lower end ;
Provided on the side of the duct body, and connected to the exhaust fan outlet through the exhaust fan, and has a short pipe for introducing the exhaust discharged from the exhaust fan into the duct body. ,
On the upper end portion side in the duct main body, a vertical wall shape that is located at a substantially middle portion in the front-rear direction of the duct main body that is parallel to the axial direction of the discharge port in the exhaust fan and extends in the width direction of the duct main body. As the first guide plate is fixed,
Near the upper edge of the short pipe in the duct body, a substantially horizontal strip-shaped second guide plate extending in the width direction of the duct body is fixed,
The second guide plate is formed with a slight downward slope as it is separated from the short tube side,
The lower end of the first guide plate is substantially located on a straight line connecting the upper end of the duct body on the side away from the short pipe and the lower end of the short pipe throttle part on the discharge port side of the exhaust fan,
The tip of the second guide plate is substantially located on a straight line connecting the upper end of the first guide plate and the lower end of the short tube restrictor at the discharge port side of the exhaust fan. Exhaust duct to be. The exhaust duct according to claim 1, wherein a bottom surface of the duct body is formed to be inclined downward toward a side away from the short pipe, and rainwater discharge means is provided in the vicinity of a lower end of the inclined surface . An external air conditioner comprising the exhaust duct according to claim 1 or 2,
A first chamber that air-conditions the outside air taken in from the outside, the air flow direction being the longitudinal direction;
The second chamber is separated from the first chamber by a partition plate, a part of the supply air supplied from the first chamber to the air-conditioned space is introduced as return air, and the flow direction of the return air is the second direction. And
By reversing the flow directions of the air and the return air, the intake position of the air with respect to the first chamber and the exhaust position of the return air in the second chamber are changed between the first chamber and the second chamber. The same side in the longitudinal direction of the chamber,
And the exhaust fan is installed so that the axis of the discharge port extends in the horizontal direction on the downstream side in the air flow direction of the second chamber,
The intake position of the air in the first chamber is at a height position close to a floor surface, and the exhaust duct according to claim 1 or 2 is connected to a discharge port of the exhaust fan. Features an external air conditioner.

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