JP2009144966A - Gas transfer device - Google Patents

Abstract

The present invention is an air conditioner installed in a factory or the like, and can provide a gas transfer device 1 having a sufficient gas transfer capability even in a limited space.
SOLUTION: A main pipe 5 communicating between the inside and outside of the air-conditioned space 2, a suction port 6 for sucking gas into the main pipe 5 in the air-conditioned space 2, and the main pipe 5 outside the air-conditioned space 2 A discharge port 8 for discharging gas from the air-conditioned space 2 to the outside of the air-conditioned space 2, and a blower 4 for discharging gas from the main pipe 5 in the vicinity of the discharge port 8. Thus, the inside of the annular main pipe 5 acts as a kind of chamber.
[Selection] Figure 1

Description

  The present invention relates to a gas transfer device that carries gas in an air-conditioned space such as a factory out of the air-conditioned space.

  Conventionally, when installing a gas transfer device in a building such as a factory, it is necessary because of the size of the air-conditioned space that performs air conditioning such as air supply and exhaust, the equipment used in the air-conditioned space, and the work status. The air volume to be calculated is calculated, and the pipe and the blower are selected so as to satisfy the required air volume, and the gas conveying device is designed.

In particular, for a gas transfer device that performs exhaust, a branch duct (“branch pipe” in the present application) is provided near a plurality of devices, and the branch duct is concentrated via a main duct (“main pipe” in the present application). What leads to a dust box and a centralized blower (the “blower” in the present application) has been proposed (see, for example, Patent Document 1).
Japanese Utility Model Publication No. 5-5872

  When using the above conventional technology, it is necessary to install a branch duct for each device to be exhausted. As the air-conditioned space becomes larger, the number of installed devices increases as the number of installed devices increases. The main duct will increase.

  Further, if the number of branch ducts and main ducts increases, the design of the gas transfer device for supplying the necessary air volume becomes complicated, and moreover, space and work man-hours for routing these ducts are required.

  Therefore, when replacing installed equipment, for example, equipment on the production line, it is necessary to review existing branch ducts and main ducts, and in some cases, redesign and construction of the gas transfer device is required. There was a problem that it was not possible to respond promptly.

  Therefore, the present invention has an object to provide a gas transfer device that can respond quickly even when a change in the air-conditioned space, in particular, a change in the layout of the device occurs.

  Therefore, in order to achieve the above object, the present invention has an annular main pipe that communicates the inside and outside of the air-conditioned space, thereby achieving the initial object.

  The gas conveyance device of the present invention is a kind of chamber in which the main pipe is annular, the pressure inside the annular main pipe is the lowest at the outlet side where the blower is provided, and the inside of the main pipe is negative. Works.

  Therefore, the gas in the air-conditioned space can be conveyed out of the air-conditioned space without causing gas leakage from the main pipe to each suction port.

  As a result, when a layout change of the device occurs in the air-conditioned space, the number of the suction ports is increased or decreased along with this layout change, or even if the position of the suction port needs to be changed, Only by making the number and position of the suction ports correspond, it is possible to promptly provide a gas transfer device that realizes the air conditioning required after the layout change.

  In the embodiment of the present invention, the main piping that communicates the inside and outside of the air-conditioned space is annular.

  By setting it as this structure, the inside of cyclic | annular main piping acts as a kind of chamber where the pressure of the discharge port side which provided the air blower is the lowest, and the inside of main piping becomes a negative pressure.

  Therefore, the gas in the air-conditioned space can be conveyed out of the air-conditioned space without causing gas leakage from the main pipe to each suction port.

  As a result, when a layout change of the device occurs in the air-conditioned space, the number of the suction ports is increased or decreased along with this layout change, or even if the position of the suction port needs to be changed, Only by making the number and position of the suction ports correspond, it is possible to promptly provide a gas transfer device that realizes the air conditioning required after the layout change.

  In another embodiment of the present invention, the total amount of gas that can be discharged by the blower is greater than or equal to the total amount of gas sucked at the suction port, and the cross-sectional area of the main pipe is the amount of gas sucked at the suction port. By setting 50% or more of the total air volume as the cross-sectional area of the pipe that can be transported, it acts as a kind of chamber in which the pressure on the discharge port side is the lowest and the inside of the main pipe is negative.

  As a result, regardless of how much airflow each suction port provided in the main pipe sucks at which position, the air volume is naturally distributed without leaking from the main pipe to each suction port. Will be realized.

  Therefore, since it is possible to carry the necessary gas as appropriate, even in a limited space such as a factory, if the cross-sectional area of the main pipe can be secured more than a predetermined value, equipment installed in the air-conditioned space Regardless of the layout, it is possible to obtain a gas transfer device having a necessary gas transfer capability.

In another embodiment of the present invention, the cross-sectional area of the main pipe is substantially constant.
By adopting this configuration, a change in static pressure is suppressed, and unnecessary pressure loss is not caused.

  As a result, smooth gas transfer can be realized.

In another embodiment of the present invention, the main pipe has a square cross-sectional shape.
By adopting this configuration, the main pipe can be installed without a gap in a limited space.

  As a result, the ratio of the main pipe to the limited space can be maximized.

  Moreover, other embodiment of this invention uses the air blower which makes variable the air volume which can be conveyed to an air blower.

  By adopting this configuration, it is possible to realize a so-called energy-saving gas transfer device that consumes only energy suitable for the air volume of the gas to be transferred.

  Embodiments of the present invention will be described below with reference to the drawings.

Example 1
First, FIG. 1 is a configuration diagram showing a configuration of a gas transfer device 1 of the present invention.

  As shown in FIG. 1, a space to be air-conditioned in a gas transfer device 1 such as a factory building, a predetermined floor of a factory, or the inside of a clean room is an air-conditioned space 2 and the air-conditioned space 2. The number of devices to be installed is 3.

  As this device 3, for example, when using a solder application device that solders an electronic component to a printed circuit board, a paste application device that applies paste to a glass substrate, or other devices that require exhaust, such as a drying furnace or a baking furnace, The gas transfer device 1 is used as an air conditioning facility for exhaust.

  FIG. 2 is an explanatory diagram conceptualizing the configuration diagram shown in FIG.

  As shown in FIG. 2, the main pipe 5 is composed of an annular pipe that communicates the inside and outside of the air-conditioned space 2.

  The main pipe 5 may have any cross-sectional shape such as a circle, an ellipse, or a polygon.

  If the location where the main pipe 5 is installed is restricted in the height direction, the cross-sectional shape of the main pipe 5 is a square, the length in the height direction is set to the full limit value, and the length in the width direction is set. If the cross-sectional area for obtaining the necessary air volume is secured by adjusting the height, the given space can be used efficiently and the design becomes easy.

  The main pipe 5 includes a suction port 6 (6a to 6d) that guides the gas to be exhausted generated in the equipment 3 (3a to 3d) installed in the air-conditioned space 2 into the main pipe 5, and a gas. The blower 4 (4a, 4b) that generates the flow of gas and the gas flowing in the main pipe 5 are discharged from the main pipe 5 to the outside of the air-conditioned space 2 by the blower 4 (8a, 8b). ).

The numbers <200>, <350>, etc., shown in the vicinity of each device 3 (3a to 3d) indicate the amount of air to be exhausted (unit “m ³ ) generated by the operation of each device 3 (3a to 3d). / Min ", the same applies hereinafter).

  The blower 4 is selected according to the scale of the gas transfer device 1 and the required air volume, and is not particularly limited to a centrifugal blower, an axial flow blower, etc., but when air conditioning is performed on a large-scale facility such as a factory, A centrifugal blower is generally used because of its large amount.

  In such a configuration, first, the blower 4 starts to move.

  Then, the gas in the main pipe 5 is sequentially discharged from the vicinity of the discharge port 8 (8a, 8b) to the outside of the air-conditioned space 2, and the inside of the main pipe 5 becomes negative pressure.

  As a result, the pressure on the discharge port 8 (8a, 8b) side near the blower 4 is in the lowest state.

  Then, by performing some work, the gas to be exhausted generated in the device 3 (3a to 3d) is sucked into the main pipe 5 from the suction port 6 (6a to 6d), and the blower 4 (4a, 4b). Rides on the gas flow 7 (arrows 7a to 7c and 7c to 7e in the figure) produced by the gas and flows to the discharge port 8 (8a and 8b), and is discharged from the discharge port 8 to the outside of the air-conditioned space 2. .

  At this time, since the gas sucked into the main pipe 5 from the suction port 9a (or 9d) has the lowest pressure on the discharge port 8 (8a, 8b) side, as described above, 7b to 7c (or 7e) To 7f) to the discharge port 8 (8a, 8b) and does not leak from the suction port 9b (or 9c) in the middle.

  By the way, the numbers “500” and “500” shown in the vicinity of the main pipe 5 are the amount of air that can flow through the main pipe 5, and the numbers “500” and “500” shown in the vicinity of the blower 4 The air volume that can be exhausted is shown.

  That is, the feature of the present invention is expressed by the following equation.

Ｑｔ１：送風機４の搬送する風量［単位：ｍ^３／ｍｉｎ］
ｑｎ：被空調空間２内に配される各機器３（３ａ〜３ｄ）の必要風量
［単位：ｍ^３／ｍｉｎ］（ｎ＝１〜４）
Ｓｑ１：主配管５が流すことができる風量［単位：ｍ^３／ｍｉｎ］
ｓ１：主配管５の許容風速［単位：ｍ／ｓ］
Ｓ１：Ｓｑ１を実現することが可能な主配管５の断面積［単位：ｍ^２］
なお、上述した主配管５の許容風速ｓ１は、一般的には１０〜１５ｍ／ｓで設計することが多いが、本実施例は、排気に関する配管のため、１５ｍ／ｓで計算を行った。

Qt1: Air volume carried by the blower 4 [unit: m ³ / min]
qn: Necessary air volume of each device 3 (3a to 3d) arranged in the air-conditioned space 2
[Unit: m ³ / min] (n = 1 to 4)
Sq1: Air volume [unit: m ³ / min] that the main pipe 5 can flow
s1: Allowable wind speed of the main pipe 5 [unit: m / s]
S1: Cross-sectional area of the main pipe 5 capable of realizing Sq1 [unit: m ² ]
The allowable wind speed s1 of the main pipe 5 described above is generally designed at 10 to 15 m / s, but in this example, calculation was performed at 15 m / s because the pipe is related to exhaust.

  These characteristics are shown in Table 1.

すなわち、上述した（１）、（２）式を満たす条件下において、送風機４を稼動すれば、主配管５内が負圧となり、吸込口６から主配管５を介して吐出口８へと、被空調空間２内に設置した機器３近傍の気体を排気することができる。

That is, if the blower 4 is operated under the conditions satisfying the above-described formulas (1) and (2), the inside of the main pipe 5 becomes negative pressure, and the suction port 6 passes through the main pipe 5 to the discharge port 8. The gas in the vicinity of the device 3 installed in the air-conditioned space 2 can be exhausted.

  At this time, since the inside of the main pipe 5 functions as a chamber having the lowest pressure on the discharge port 8 (8a, 8b) side, the flow of gas regardless of the position of the suction ports 6 (6a to 6d). Without generating leakage from the suction ports 6b and 6c located downstream of 7b and 7e, the gas generated in the devices 3a to 3d is passed through the main pipe 5 to the discharge ports 8 (8a and 8b). It can flow.

  The gas sucked into the main pipe 5 has a flow rate satisfying the above expression (2) as arrows 7a to 7c and arrows 7d to 7e in the figure, and the flow rate ratio is apportioned to 50:50.

  Thereafter, the gas that has flowed in the main pipe 5 in the direction of arrows 7a to 7c and arrows 7d to 7e merges in the vicinity of the discharge port 8, and is blown from the discharge port 8 (8a, 8b) to the air-conditioned space by the blower 4. 2 is discharged outside.

(Example 2)
Next, as shown in FIG. 3, a device 3 e is added to the gas transfer device 11 installed in the air-conditioned space 2.

  The number <250> shown in the vicinity of the device 3e indicates the air volume that the device 3e needs to exhaust, as in the first embodiment.

  At this time, in accordance with the formulas (1) and (2) shown in the first embodiment, the blower 14a operates with the air volume increased from that of the first embodiment so as to satisfy the following formula.

Ｑｔ２：送風機１４（１４ａ、４ｂ）の搬送する風量［単位：ｍ^３／ｍｉｎ］
ｑｎ：被空調空間２内に配される各機器１３（３ａ〜３ｅ）の必要風量
［単位：ｍ^３／ｍｉｎ］（ｎ＝１〜５）
Ｓｑ２：主配管１５が流すことができる風量［単位：ｍ^３／ｍｉｎ］
ｓ２：主配管１５の許容風速［単位：ｍ／ｓ］
Ｓ２：Ｓｑ２を実現することが可能な主配管１５の断面積［単位：ｍ^２］
なお、上述した主配管１５の許容風速ｓ２は、一般的には１０〜１５ｍ／ｓで設計することが多いが、本実施例は、排気に関する配管のため、１５ｍ／ｓで計算を行った。

Qt2: Air volume carried by the blower 14 (14a, 4b) [unit: m ³ / min]
qn: Necessary air volume of each device 13 (3a to 3e) arranged in the air-conditioned space 2
[Unit: m ³ / min] (n = 1 to 5)
Sq2: Air volume that the main pipe 15 can flow [unit: m ³ / min]
s2: Allowable wind speed of the main pipe 15 [unit: m / s]
S2: Cross-sectional area of main pipe 15 capable of realizing Sq2 [unit: m ² ]
The allowable wind speed s2 of the main pipe 15 described above is generally designed at 10 to 15 m / s, but in this example, calculation was performed at 15 m / s because of the pipe related to exhaust.

  These characteristics are shown in Table 2.

表２から明らかなように、図３中、左側（機器３ａ、３ｂ、３ｅを設置した側）の負荷が、右側（機器３ｃ、３ｄを設置した側）に比べて重くなっている。

As is apparent from Table 2, the load on the left side (the side on which the devices 3a, 3b, and 3e are installed) is heavier than that on the right side (the side on which the devices 3c and 3d are installed).

  Even in such a state, the main pipe 15 functions as a chamber in which the pressure on the discharge port 8 (8a, 8b) side is low and the main pipe 15 has a negative pressure, as in the first embodiment. Regardless of the installation position of 3a to 3e), it is possible to construct a gas flow 17 (17a to 17g) in which the arrows 17a to 17c and 17d to 17g are apportioned to a flow ratio of 50:50.

  Moreover, there is no leakage from the suction ports 6a, 6b, or 6c located downstream of the gas flow 17a, 17b, or 17e.

As is clear from the converted values of S1 and S2, if the cross-sectional area of the main pipe 5 is 0.694 m ² , Example 1 and Example 2 can be realized using the same main pipe 5.

  In other words, if the main pipe 5 has a cross-sectional area that can flow half of the maximum air volume Qtmax that can be transported by the blower 4, if the total amount of air sucked from the suction port 6 is in the range of Qtmax or less, the blower By controlling the air volume of 4, air conveyance with a wide corresponding range can be realized.

  That is, by having a desired correspondence range, even if a device to be added (for example, 3e) is generated with respect to the layout of the device 3 that was originally designed, the gas transfer device 1 is sufficient without changing the design. Gas conveyance can be performed.

  Moreover, in Example 1 shown in FIG.

At this time, in Example 2 shown in FIG. 3, the cross-sectional areas of the main pipes 5 and 15 are
S1 = S2 = 0.556 m ²
Then,
(Sq2 / Sq1) ² × 100
If there is a blower static pressure that satisfies the condition, the gas transfer device 11 described in the second embodiment can be realized without changing the main pipe 5 described in the first embodiment.

  In addition, in the first and second embodiments, the sum of the suction air volumes (Σqn) from the devices 3 and 13 sucked into the main pipes 5 and 15 and the sum of the discharge air volumes discharged from the main pipes 5 and 15 (ΣQt). ) And the cross-sectional area (S) of the main pipes 5 and 15 is a cross-sectional area capable of transporting 50% or more of the total amount of air sucked by the suction ports 6 and 16, all components are wasted. Therefore, the most efficient gas transfer devices 1 and 11 are realized.

  As is clear from the above description, in the configurations of the first and second embodiments, the pressure on the discharge port 8 (8a, 8b) side is low, and the main pipes 5 and 15 function as a chamber in which a negative pressure is applied. Therefore, no leakage occurs from the suction ports 6a, 6b, or 6c located downstream of the gas flow regardless of the installation positions of the devices 3a to 3e.

  Moreover, even if the branch pipes 9 and 19 (9a to 9e) are added, the negative pressure state in the main pipes 5 and 15 and the pressure on the discharge port 8 (8a and 8b) side remain low. Further, there is no design change by providing the branch pipes 9 and 19 (9a to 9e).

  As a result, regardless of the installation position of each device 3, 13, it is possible to suck the gas to be exhausted generated in each device 3, 13 into the main pipes 5, 15. 4, 14 (4a, 14a, 4b) can be discharged to the outside of the air-conditioned space 2.

  That is, when the main pipes 5 and 15 are installed, even in a limited space, if the cross-sectional area of the main pipes 5 and 15 can secure 50% or more of the total amount of air sucked by the suction ports 6 and 16, The air-conditioned space 2 can be sufficiently exhausted.

  Moreover, according to the present invention, since the main pipes 5 and 15 act as chambers, they are not affected by the installation positions of the devices 3 and 13 installed in the air-conditioned space 2, and the layout of the devices 3 and 13 can be changed. Even if it occurs, sufficient exhaust can be performed without changing the design of the gas transfer devices 1 and 11.

  Moreover, even if the device 3e is newly added, the sum of the discharge air volume discharged from the main pipes 5 and 15 is larger than the sum of the suction air amounts from the devices 3 and 13 sucked by the main pipes 5 and 15, and If the cross-sectional area of the main pipes 5 and 15 has a cross-sectional area capable of transporting 50% or more of the total amount of air sucked by the suction ports 6 and 16, the gas flowing through the main pipes 5 and 15 is a load to be sucked Accordingly, it is naturally distributed and sufficient exhaust can be obtained.

  The main pipes 5 and 15 can be expected to have the same effect even if they have a box shape. However, in the case of a box shape, since the weight of the main pipes 5 and 15 increases, installation such as hanging is difficult. Sometimes it becomes.

  In other words, if the main pipes 5 and 15 have an annular shape, the main pipes 5 and 15 can be easily enlarged and installed in a large-scale facility.

  By the way, the fan 4 (4a, 4b), 14 (14a, 4b) demonstrated in the said Example 1, 2 may use one capability variable fan (for example, fan which can be controlled by an inverter), or on A plurality of blowers with only / off may be used. Or you may combine the fan 4 of the 3 steps | paragraph change that the capability is 0%, 50%, 100%.

  In this way, by using the capabilities of the blowers 4 and 14 as necessary, unnecessary power is not consumed, so that energy saving can be realized.

  Moreover, the gas conveyance apparatuses 1 and 11 of this invention can also be used as an air conditioning equipment for intake by switching the rotation direction of the blowers 4 and 14.

  In the air-conditioned space where the existing gas transfer device performs air conditioning, the present invention can easily cope with a change in the layout of the installed equipment, so that large commercial facilities, gymnasiums, auditoriums, etc. It is expected to be widely applied to gas conveyance.

The block diagram which shows the structure of the gas conveyance apparatus in one Example of this invention. Explanatory drawing which shows the concept of the gas conveyance apparatus in one Example of the same invention Explanatory drawing which shows the concept of the gas conveyance apparatus in the other Example of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,11 Gas conveyance apparatus 2 Air-conditioned space 3, 3a-3e, 13 Apparatus 4, 4a, 4b, 14, 14a Blower 5, 15 Main piping 6, 6a-6e, 16 Suction port 8, 8a, 8b Discharge port

Claims (5)

A gas transfer device for carrying the gas in the air-conditioned space out of the air-conditioned space, the main pipe communicating between the inside and outside of the air-conditioned space, and the gas into the main pipe in the air-conditioned space A suction port for sucking in, a discharge port for discharging the gas from the main pipe to the outside of the air-conditioned space outside the air-conditioned space, and a gas for discharging the gas from the main pipe in the vicinity of the discharge port A gas conveying device characterized in that the main pipe is annular. A gas transfer device for carrying the gas in the air-conditioned space out of the air-conditioned space, and an annular main pipe communicating between the inside and outside of the air-conditioned space, and in the air-conditioned space, into the main pipe The suction port for sucking the gas, the discharge port for discharging the gas from the main pipe to the outside of the air-conditioned space outside the air-conditioned space, and the gas from the main pipe in the vicinity of the discharge port A sum of the volume of gas that can be discharged by the blower is greater than or equal to the sum of the volume of gas sucked by the suction port, and the cross-sectional area of the main pipe is sucked by the suction port. A gas conveyance device characterized by having a cross-sectional area capable of conveying 50% or more of the total gas flow rate. The gas conveyance device according to claim 1, wherein a cross-sectional area of the main pipe is substantially constant. The gas conveyance device according to claim 1, wherein a cross-sectional shape of the main pipe is a quadrangle. The gas conveying device according to claim 1, wherein the blower is configured to change the amount of air that can be conveyed.

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