JP2003166747A - Damper device for dual duct and damper assembly - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a simple-structured damper device for a dual duct to be manufactured easily. <P>SOLUTION: The damper device comprises a damper assembly 20 and a separation/connection means 60. The damper assembly 20 comprises a cylindrical casing 22, a partition board 24 for dividing the inside of the casing 22 into two equal parts for forming a pair of damper wind pathways whose section is semi-circular, semi-disk-shaped movable blades 26 and 27 attached to blade shafts 28 and 29 and disposed rotatably in each damper wind pathway, and a damper opening/closing device 30 for opening/closing the damper by controlling/rotating the blade shafts 28 and 29. The separation/connection means 60 separates an inner wind pathway formed inside an inner pipe 10a of the dual duct and an outer wind pathway formed between the inner pipe 10a and an outer pipe 10b, and connects them to the damper wind pathways. The separation/connection means 60 is made of a hollow cylindrical body with the casing 22 inserted and connected to the outer pipe 10a of the dual duct 10, and has a separation/connection member 62 comprising an inner pipe engaging cylinder part 62a, a slowly shape-changing cylinder part 62b, and a damper side engagement cylinder part 62c. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used by connecting a double duct in which an inner pipe and an outer pipe are concentrically arranged, and distributes air-conditioning air flowing in the inner air passage and the outer air passage, respectively. The present invention also relates to a damper device for a double duct that shuts off or adjusts the air volume. The present invention also relates to a damper assembly particularly suitable for the dual duct damper device.

[0002]

2. Description of the Related Art In large buildings such as buildings and hospitals, in order to regulate and ventilate indoor air, ducts for supplying and discharging air for air conditioning are stretched in a mesh shape. The duct system is equipped with various dampers for controlling the flow of the air conditioning air flowing through the duct. An air volume adjustment damper that adjusts the air volume including shutoff, a fire damper that is provided in the part that penetrates the fireproof compartment, detects the heat (temperature) of the fire and automatically closes the damper, and air It is a check damper that is distributed only in the direction. Further, most air flow rate adjustment dampers are provided, but there are types such as a manual type for performing adjustment manually, a motor drive type for performing an electric motor, or a fluid operation type for performing an air cylinder or the like.
There are two types of ducts, a square duct with a square cross section and a round duct with a circular cross section, and the dampers applied to them are formed as a square damper and a round damper, respectively. Also, the body part of the damper is generally attached to the blade shaft in a casing that is connected to a duct to form a flow passage for air conditioning air and has a plate-like movable blade having a shape corresponding to the cross-sectional shape of the flow passage. It is composed of a structure that is rotatably supported.

By the way, in recent years, as an air-conditioning duct, a double duct in which an inner tube and an outer tube, which are formed by spirally winding strip-shaped steel sheet materials and joined to each other, are concentrically arranged via a spacer (two Heavy spiral ducts) have been developed and are rapidly becoming popular. That is, in this double duct having two air passages, that is, an air passage formed in the inner pipe (inner air passage) and an air passage formed between the inner pipe and the outer pipe (outer air passage) According to this, for example, the inner air passage and the outer air passage can be used as the exhaust system and the air supply system, respectively, and the arrangement structure of the duct system can be simplified and the installation space can be reduced. On the other hand, this double duct can be easily manufactured by simply attaching some spacers to the inner pipe in advance and inserting it into the outer pipe, and the cost is not so high.

However, although the double duct has such features, a damper device which is used by being connected to the dual duct and which can control the inner air passage and the outer air passage respectively, is currently available. However, it is still unknown in the literature. However, a recent A company catalog has a damper device for such a double duct. This dual-duct damper device is specifically configured as a fire-proof damper, the detailed structure of which is not clear, but the same as the cylindrical inner casing connected to the inner and outer pipes of the double-duct, respectively. A double casing structure consisting of a circular outer casing, and the inner damper air passage formed in the inner casing is composed of a damper structure with movable vanes, while the inner casing and the outer casing are The outer damper air passage formed between the two is configured as a scroll damper structure including a scroll (movable flow path shielding element).

Although not a damper device for a double duct, Japanese Patent Laid-Open No. 2000-5333 discloses a damper device for controlling two air passages. That is, this damper device is used by connecting to a tubular plastic extrusion molding duct (two-pipe passage pipe) having a partition wall on the diameter, and a pair of box bodies having a collar portion is provided between the collar portions. A casing integrally welded with the partition plate sandwiched is provided, and rectangular vanes for opening and closing the flow path are provided like doors by hinges in each damper air passage on both sides of the partition plate. And, both ends of the casing are provided with a cylindrical connecting portion that is fitted to the two-pipe pipe in an airtight manner, and each air passage and each damper air passage of the two-pipe pipe is the end surface of the partition plate in the center of the casing. Are connected to each other by airtightly fitting to the partition wall of the two-pipe pipe.

[0006]

Even in a duct system using a double duct, the duct consisting of a single pipe line after the double duct is branched or before being converged in the double duct. In that case, the conventional damper can be used as it is. However, depending on the arrangement of the duct system,
It may be desirable to have a damper in the double duct, and it is legally required to install a fire damper in that part, especially if the double duct is placed through a fire compartment. Is also required.

The above-mentioned damper device for a double duct, which is designed as a fire damper, meets exactly this requirement. However, the damper device for a double duct, which has a double casing structure and is formed by stacking damper air passages respectively connected to the inner air passage and the outer air passage of the double duct, has an outer damper air passage. However, because it cannot be a damper structure with movable blades, it may be configured as a scroll damper,
From a structural point of view, it cannot be denied that it will be complicated.

Therefore, the present invention is a damper device which is provided so as to be connected to a double duct and which can control the flow of air for air conditioning respectively flowing in the inner air passage and the outer air passage of the damper device. It is an object of the present invention to provide a damper device for a double duct which is relatively simple and therefore easy to manufacture and can be manufactured at low cost. Another object of the present invention is to provide a damper assembly suitable for the dual-duct damper device, which is particularly easy to operate during maintenance and inspection.

[0009]

A damper device for a double duct according to the present invention is provided with a cylindrical casing and a diameter of the casing, and the inside of the casing is divided into two equal parts in a longitudinal direction and a pair of dampers having a semicircular cross section. A partition plate that defines an air passage, a semicircular movable blade that is attached to the blade shaft and is rotatably arranged in each damper air passage, and a damper that controls the rotation of the blade shaft. A damper assembly that includes a damper opening / closing device that opens and closes the air duct, and a shunt flow that splits the inner duct and the outer duct of the double duct to connect with each damper duct of the damper assembly.
And a connecting means. (Claim 1)

As described above, in this dual-duct damper device, the damper air passages connected to the inner air passage and the outer air passage of the double duct are simply divided into two parts by the partition plate. With such a structure, it is formed as a pair of damper air passages having a semi-circular cross section defined between the surface on each side of the partition plate and the inner surface of the casing facing it, and
Each damper air passage has a most general and simple damper structure in which a movable blade is attached to a blade shaft and is rotatably disposed. Therefore, it is structurally simple as a damper device that can control the inner and outer air passages of the double duct separately, and therefore the damper device is easy to manufacture and can be manufactured at low cost.

According to one embodiment of the present invention,
The flow dividing / connecting means in the damper device for a double duct includes a flow dividing / connecting member formed of a hollow cylindrical body that connects the inner air passage of the double duct and one damper air passage of the damper assembly. Can be configured as. That is, in the damper device for a double duct of the present invention, the flow dividing / connecting means described above has a circular inner pipe fitting cylinder portion that is airtightly fitted in the inner pipe of the double duct, and a semicircle from a circular shape. Hollow tubular body including a gradually changing tubular portion that gradually changes the tubular shape and a semicircular damper-side fitting tubular portion that airtightly fits in one damper air passage of the damper assembly While the casing of the damper assembly is inserted and connected in the outer pipe of the double duct, the flow dividing / connecting member includes the inner pipe fitting cylinder portion and the damper side fitting. It is characterized in that the tubular portion is arranged and fitted in the inner pipe of the double duct and one of the damper air passages of the damper assembly. (Claim 2)

Since the flow dividing / connecting means is constructed in this way, the inner air passage in the inner pipe of the double duct is provided with one damper via the inside of the flow dividing / connecting member made of a hollow cylindrical body. Since it is airtightly connected to the air duct and the casing of the damper assembly is inserted and connected in the outer pipe of the double duct, the outer air duct between the inner pipe and the outer pipe of the double duct is connected. Are hermetically connected via the remaining space between the outer surface of the diversion / connection member and the inner surface of the casing or the double-duct outer tube. Further, between the inner pipe fitting tubular portion and the damper side fitting tubular portion of the flow dividing / connecting member is formed as a shape gradually changing tubular portion that gradually changes the tubular shape from a circular shape to a semicircular shape.
The air for air conditioning can smoothly flow through each air passage. Thus, according to this flow dividing / connecting means, the inner air passage and the outer air passage of the double duct are reliably and smoothly diverted without being mixed, and are connected to the damper air passages of the damper assembly. .

Further, the damper assembly of the present invention which is particularly suitable for the above-mentioned damper device for a double duct is provided with a cylindrical casing and a diameter of the casing, and the inside of the casing is 2 etc. in the longitudinal direction. A partition plate that divides to define a pair of damper air passages with a semicircular cross section, and semicircular movable blades and blade shafts that are attached to the blade shafts and rotatably arranged in each of the damper air passages. And a damper opening / closing device for opening / closing the damper by controlling the rotation of the damper, the blade shaft of which has the movable blade attached in one damper air passage, and the other side of the damper air passage through the other damper air passage. A hollow blade shaft extending to the outside of the casing, and the movable blade attached to the other damper air passage, and a hollow extending from the other damper air passage to the outside of the casing by being fitted onto the solid blade shaft. Feather And an operating portion of the damper opening / closing device configured to control the rotation of the blade shafts, respectively, is provided outside the casing on the side where the blade shafts extend. It is a thing. (Claim 3)

As described above, in this damper assembly, in particular, the blade shafts to which the movable blades arranged in the damper air passages are attached respectively are the solid blade shafts extending to the outside of one of the casings. The operation part of the damper opening / closing device, which has a double shaft structure consisting of a hollow blade shaft fitted on the outside of the casing, controls the rotation of the blade shafts. It is provided on the exit side. Therefore, the blade shafts can be rotated from the same side, and the operation at the time of maintenance and inspection can be facilitated.

[0015]

1 to 5 and 9 show a damper device for a double duct according to an embodiment of the present invention, in which FIG. 1 is a transverse sectional view of the whole, and FIG. FIG. 3 is a vertical cross-sectional view of the main part of the damper assembly, FIG. 3 is a cross-sectional view of the main part of the damper assembly at right angles to FIG. 1, and FIG.
1 is a cross-sectional view of the connecting means at right angles to FIG. 1, and FIG.
It is a perspective view of a connection member, and FIG. 9 is an external view of the whole.

As shown in FIG. 9, the damper device of the present embodiment includes a double duct 10, more specifically, an inner pipe 10a formed of a spiral pipe formed by spirally winding and joining band-shaped metal plates. The outer pipe 10b and the duct 10 arranged concentrically are provided so as to be connected to each other, and the inner pipe 10a (inner air passage) and the inner pipe 1 are provided.
The air flow between the 0a and the outer pipe 10b (outside air passage) is made to flow and be blocked or adjusted, and the damper assembly 20 and the inner wind of the double duct 10 provided on both sides thereof are provided. The airflow path and the external airflow path are divided and connected to the respective damper airflow paths of the damper assembly 20 described later, and the flow dividing / connecting means 60 is provided. In addition, between the inner pipe 10a and the outer pipe 10b of the double duct 10, spacers that do not hinder the flow of air are provided at appropriate intervals, and the interval between them is kept constant. . The cross-sectional areas of the inner air passage and the outer air passage are configured to be substantially equal.

<Damper Assembly> The structure of the damper assembly 20 is shown in FIGS. 1, 2 and 3. Note that FIG.
Although these drawings including the above are shown in the state in which the damper is fully opened, only FIG. 3 is shown in the state in which the damper is fully closed (closed).

As shown in these figures, the damper assembly 20
Is a cylindrical casing 22 as its main body, and a partition provided on the diameter of the casing 22 and forming a pair of damper air passages having a semicircular cross section by dividing the inside of the casing 22 into two equal parts. And a plate 24. Then, in each damper air passage having a semicircular cross section defined by the partition plate 24, the semicircular disk-shaped movable blades 26, 27 corresponding to the air passage are provided.
The solid blade shaft 28 and the hollow blade shaft 29 are fixed to each other and rotatably arranged. Therefore, the movable blade 2
When 6 and 27 are positioned at right angles to the damper air passage, the air passage is closed (damper fully closed), and when they are rotated 90 degrees and positioned in parallel, the air passage is most opened (damper fully open).
In addition, between these damper full close and damper full open,
By adjusting the arrangement angle of the movable blades 26, 27 with respect to the damper air passage, it is possible to change the air volume (air circulation amount).

More specifically, the casing 22 is manufactured by rolling a square steel plate having an appropriate size into a cylindrical shape by rolling and welding the abutting end portions, and the outer diameter thereof is the outer tube 10b of the double duct 10. Is equal to the inner diameter of. And
The casing 22 has an annular groove 22a that bulges inward in a trapezoidal shape in the central portion thereof, and an annular protrusion 22b that bulges outward in a predetermined portion from the end portion thereof. , Is formed in accordance with the roll processing. This annular groove
22a constitutes a bearing portion for the blade shafts 28, 29 and also functions as a stopper for the movable blades 26, 27 when the damper is closed, and the annular convex portion 22b enhances the strength,
It functions as a stopper for the outer pipe (10b) when the damper assembly (20) is inserted and connected into the outer pipe (10b) of the double duct (10).

The partition plate 24 is made of a metal plate having a width equal to the inner diameter of the casing 22 and a length substantially equal to the length of the casing 22. In the present embodiment, the partition plate 24 is previously formed in the annular groove portion 22a. The trapezoidal convex portion 24a of the corresponding shape is located in the center portion, and the appropriate locking convex portion 24b is formed from the end portion to a predetermined portion, and a pair of steel plates formed by bulging by press molding along the width direction are spotted. It is made by welding and pasting. Like the annular groove 22a of the casing 22, the trapezoidal projection 24a constitutes a bearing portion of the blade shaft 28 and functions as a stopper for the movable blades 26, 27 when the damper is closed, and the locking projection 24b. Is a flow dividing / connecting member 5 described later.
As a stopper of 2, it enhances airtightness. The partition plate 24 can also be formed from a single metal plate material, and in that case, the trapezoidal convex portion 24a and the locking convex portion 24b thereof.
Can be formed by joining metal plate pieces of appropriate thickness. The partition plate 24 has an annular groove portion.
The casing 22 is arranged along the length direction of the casing 22 through the notches, and is welded and fixed at a position within the annular groove portion 22a.

The movable blades 26, 27 are formed of a steel plate in a semi-circular shape, and the central portions on the radius thereof are blade shafts 28, 29.
Is stuck to. More specifically, in particular in FIG. 3 (partition plate
Movable blade 26, as shown in cross section except 24)
A tubular portion through which the blade shaft 28 (29) can be inserted is formed in the center portion on the radius of (27) by cutting the portions alternately, and the movable blade 26 (27) is 28
After being inserted and set in (29), it is firmly attached by welding or the like. The movable blades 26 (27) are formed in a shape offset from the central axis of rotation so that their quadrants are parallel to each other in order to obtain airtightness when the damper is closed. That is, when the damper is closed, the surface of the peripheral portion of the movable blade 26 (27) is brought into planar contact with the annular groove portion 22a of the casing 22 and the side surface of the trapezoidal convex portion 24a of the partition plate 24, whereby higher airtightness is achieved. I try to get the sex.

In the present embodiment, the movable blades 26, 27
The blade shafts 28 and 29 to which the respective blade shafts are attached are solid blade shafts 28 and 29
It constitutes a double shaft with a hollow blade shaft 29 which is fitted onto 28. Then, the solid blade shaft 28 penetrates the annular groove portion 22a of the casing 22 and the trapezoidal convex portion 24a of the partition plate 24 and is bearing-supported by these portions, and the partition plate 24 has the diameter of the casing 22 as its axis. And extend at a right angle, and project and extend on both sides outside the casing 22 by a predetermined length. Also, the hollow blade shaft 29
Is disposed and supported by a solid blade shaft 28 in one damper air passage in the casing 22 divided by the partition plate 24, and penetrates the annular groove 22a to a predetermined length outside the casing 22. It protrudes and extends. In addition, in the annular groove portion 22a through which the blade shaft 29 penetrates, the blade shaft 2
As in the case of 8, a bush for bearing support is interposed.

<Damper Opening / Closing Device> The above-mentioned damper main body is provided with movable blades 26, 27 fixed to those blade shafts.
A damper opening / closing device 30 for opening / closing the damper by controlling the rotation of each of 28 and 29 is provided outside the casing 22.
Further, in the present embodiment, this damper opening / closing device, which is generally indicated by 30, when the temperature of the air flowing in the duct rises due to a fire or the like, the damper is closed automatically by sensing the temperature. It is configured as a damper automatic closing device. In addition, the operation parts of each blade shaft 28, 29 are
It is gathered on one side outside.

Specifically, the outer wall of the casing 22 from which the vane shafts 28 and 29 project is surrounded by the outer walls of the casing 22 in order to protect it from interference when a heat insulating material such as glass wool is applied. A cup-shaped base 32 having a sufficient height is fixed. Then, on the upper surface of this base 32, a return spring composed of a coiled spring is provided.
34 is arranged around the blade shaft 29, and one end thereof is locked. On the other hand, a flange member 36 is fixed to the end of the hollow blade shaft 29, and an operating lever 38 is attached to this with a small screw. The operating lever 38 is formed of a steel plate, has a ladle-like planar shape, and has a central hole through which the blade shaft 29 is inserted, as shown in FIG. And a grip portion extending from a part.
Then, a sleeve-like member 38a having a diameter surrounding the return spring 34 and having a slit in the length direction is fixed to the lower surface of the disc portion of the operation lever 38, and the other end of the return spring 34 is It is locked in the slit. That is, the operation lever 38 is fitted and inserted through the blade shaft 28 while locking the other end of the return spring 34 in the slit of the sleeve-shaped member 38a, and then the return spring 34 is still wound to some extent even when the damper is closed. The blade shaft 29 is assembled by being screwed to the flange member 36 of the blade shaft 29. It should be noted that the grip portion of the operation lever 38 is designed to be parallel to the movable blade 27 in the assembled position.

Further, the operating lever 38 is provided with a hook spring piece 40 formed by bending a small strip of spring steel material in a key-like shape at a part of the enlarged diameter part of the peripheral edge of the disk portion, which is bent toward the center side. Deformably mounted. A temperature fuse device 42 is arranged at an appropriate position of the casing 22 corresponding to the latch spring piece 40, and the operation lever 38 is rotated 90 degrees from the damper fully closed position while the return spring 34 is wound and tightened ( When the damper is fully opened (in the counterclockwise direction in FIG. 9), the latch spring piece 40 is the latch pin of the temperature fuse device 42.
44, so that the damper is kept open. This temperature fuse device 42 is
Are well known in the art in various specific forms,
Basically, it includes a temperature sensitive element 46 such as a fuse metal or a shape memory alloy located in the damper air passage, and when the temperature sensitive element 46 is melted or deformed by the temperature (heat) at the time of a fire, it protrudes. The retaining pin 44 in the form of a plunger that was held in place is adapted to retract into the body. It should be noted that the temperature fuse device 42 is provided in the casing 22.
It is sealingly attached to a holding cylinder 48 fixed to the and is extended into the damper air passage.

Hollow blade shaft 29 to which movable blade 27 is attached
The device (first damper opening / closing device) that controls the rotation of the damper is configured as described above, and is normally held in the damper fully open state. When a fire or the like occurs and the temperature of the air flowing in the damper air passage rises, the heat sensitive element 46 of the temperature fuse device 42 is melted or deformed in response to the temperature (heat), and the latch pin 44 is pulled in. , By which the operating lever
The operation lever 38, which is released from the engagement with the latch spring piece 40 of 38, moves the movable blade 27 to the annular groove 22a and the trapezoidal convex portion due to the torsion spring force of the return spring 34 which is wound and tightened. Blade axis 2 until it hits the side of 24a and is stopped
Automatically pivots with 9, thus closing the damper. Further, since the return spring 34 is still wound to a certain extent even when the damper is closed, the remaining force of the return spring 34 ensures that the closed state of the damper is maintained.

Solid blade shaft 28 with movable blade 26 attached
The device (second damper opening / closing device) for controlling the rotation of is also configured in the same manner as the first damper opening / closing device described above.
That is, the blade shaft 28 extends further outward than the hollow blade shaft 29, and a horseshoe-shaped flange member 37 is attached to the tip thereof, and the sleeve member 38 is attached to the flange member 37.
An operating lever 39, which is the same part as the operating lever 38 except that it is not provided with a, is screwed and attached so that the grip portion is on the opposite side with a slight distance from it. A latch spring piece 40 is attached to the operation lever 39 so that the latch pin 44 of the temperature fuse device 43 is engaged at the fully opened position of the damper. The thermal fuse device 43 is different from the thermal fuse device 42 only in the length of the main body portion, and is attached to a holding cylinder 49 that extends through the casing 22 to the partition plate 24 to detect the temperature of the tip. The element 46 is located in the damper airway in which the movable vanes 28 are arranged. (Note that, in FIGS. 1 and 2, the temperature fuse device 43 and the holding cylinder 49 thereof are shown by dotted lines because they are arranged on the front side of the cut surface).

However, in this second damper opening / closing device, a return spring 35 for urging the blade shaft 28 to which the movable blade 26 is attached in the damper closing direction is provided outside the casing 22 on the opposite side. . Specifically, the blade shaft 28 is projected to the outside of the casing 22 on the opposite side by a predetermined length, and a substrate 50 is fixed to the outer surface of the casing 22 correspondingly, and a conical shape is formed on the substrate 50. A return spring 35, which is a coil spring, is arranged with its one end locked and the other end locked to a boss 52 attached to the tip of the blade shaft 28. The return spring 35 together with the protruding blade shaft 28 is covered by a cover 54 mounted on the substrate 50. When assembling the return spring 35, as in the case of the return spring 34 of the first damper opening / closing device, even when the movable blade 28 is in contact with the annular groove 22a and the trapezoidal protrusion 24a, the damper is still wound to some extent. It is supposed to be in a tightened state. Therefore, the action when a fire occurs is the same as that of the first damper opening / closing device.

In the damper assembly 20 of the present embodiment thus configured as a fireproof damper, the movable blade 2
Inspection port 56, which is made of a cylindrical body and has a detachable lid, is welded to casing 22 for each damper air passage to visually check the open / closed state of 8 and 29 from the outside. Is provided. And at the time of inspection, the inspection port
At the same time as the inspection from 56, the locking spring pieces 40 attached to the operation levers 38 and 39 are pressed inward and the temperature fuse device 42,
The engagement of 43 with the latch pin 44 is removed, and the operation state of the blade shaft,
Alternatively, the temperature sensitive element 46 of the temperature fuse device 42, 43 can be inspected. After the inspection, after mounting the temperature fuse devices 42 and 43, the operating levers 38 and 39 are rotated in the opening direction until the latch spring piece 40 is once pushed down by the latch pin 44 and engaged. It can be reset by

The damper opening / closing device 30 may be provided with an air volume adjusting function, if necessary. That is, the portion including the latch spring piece 40 is connected to the operation lever 3
Formed as a separate part from 8, 39 and operated lever 3
By attaching the fixed position to 8, 39 adjustably,
It is possible to adjust the arrangement angle of the movable blades 28, 29 when the damper is opened, thereby adjusting the air volume.

<Other Embodiments of Damper Opening / Closing Device> In the present invention, the damper opening / closing device for controlling the rotation of the blade shaft to which the movable blade is attached may be implemented in various other forms. For example, it can be configured as an air volume adjusting device including fully closed, and in this case, it can be embodied as a manual operation type, a fluid pressure operating type, an electric motor driving type, or the like. Further, in this case, if desired, the damper opening / closing devices for controlling the rotation of the blade shafts can be of different types.

On the other hand, in addition to the above-described embodiment in which the operating portions of the damper opening / closing devices for controlling the opening / closing of the movable blades 28, 29 are arranged on one side of the casing 22, the damper opening / closing devices including the operating portions are provided. Can be provided on both sides of the casing 22, respectively. In this case, each blade shaft to which the movable blade is attached is configured as a solid blade shaft extending from the position of the partition plate 24 to the outside of the casing 22, and a damper opening / closing device is provided for each blade shaft. More specifically, each of the blade shafts has a hollow blade shaft 29 and a blade shaft 28.
Of the partition plate 24 and the end portions of the partition plate 24 are supported by bearings, and the damper opening / closing device for controlling the rotation of each blade shaft is in accordance with the above-described embodiment. For example, it can be configured to include the base 32, the return spring 34, the operation lever 38, the temperature fuse device 42, and the holding cylinder 48 described as the first damper opening / closing device. That is, in this case, the damper assembly 20 is formed symmetrically on both sides of the partition plate 22.
Furthermore, depending on the mode of use of the damper device, the blade shaft and the damper opening / closing device that controls the rotation of the blade shaft are configured as a single unit, and both damper air passages defined by the partition plate 24 are simultaneously formed. It is also possible to control opening and closing.

However, as in the above-described embodiment, the blade shaft passes through the entire inside of the casing 22, and
22 a solid blade shaft 28 extending to one side of the outside and this blade shaft
38 and a hollow blade shaft 29 extending from the location of the partition plate 24 to the same side of the casing 22 outside the casing 22, and operating means of each damper opening / closing device for controlling the rotation of these blade shafts 28, 29. The configuration in which the (operation levers 38, 39) are provided on one side outside the casing is also advantageous in the operation at the time of maintenance and inspection in a damper device which is normally arranged in a narrow space. Further, for example, when each damper opening / closing device is embodied as a manually operated air flow rate adjusting device, the air flow rate adjusting lever that is the operating means is
As a form corresponding to the operating levers 38 and 39, respectively, it can be configured so that it can be positionally adjusted to be locked to a fixing member corresponding to the temperature fuse devices 42 and 43. Being able to adjust the air flow rates of both damper air passages is advantageous not only because the air flow rate setting operation is easy, but also because it is possible to set both air flow rates while comparing them. Further, for example, when the damper opening / closing device is configured as an electric motor drive type that can be remotely controlled, the electric motor as an operating means is connected to each blade shaft via a suitable clutch means, thereby
It can be done with a stand.

<Diverting / Connecting Means> Dividing / connecting means 60 for dividing the inner air passage and the outer air passage of the double duct 10 to connect with each damper air passage having a semicircular cross section in the damper assembly 20 described above.
Is shown in FIGS. 1 and 4 and 5 (note that FIG. 4 is shown in a cross section in which the partition plate 24 is visible). Then, as shown in these drawings, in the flow dividing / connecting means 60 of the present embodiment, while the casing 22 end of the damper assembly 20 is inserted into the outer pipe 10b of the double duct 10 to be connected, Inside, the inner pipe 10a of the double duct 10 and the partition plate 2 in the damper assembly 20
A flow dividing / connecting member 62 for connecting with one of the damper air passages having the semicircular cross section defined by 4 is arranged.

The flow dividing / connecting member 62 is made of a hollow cylindrical body, and in particular, in the present embodiment in which the damper assembly 20 is configured as a fireproof damper, it is formed as a cast product of iron-based metal (cast iron). There is. The flow dividing / connecting member 62 basically has a circular inner pipe fitting tubular portion 62a that is hermetically fitted in the inner pipe 10a of the double duct 10, and a circular to semicircular shape. The shape gradually changing cylinder portion 62b for gradually changing the shape and one damper air passage in the damper assembly 20 (that is, between the surface on one side of the partition plate 24 and the inner wall surface of the casing 22 opposed thereto) are hermetically sealed. And a damper-side fitting cylinder portion 62c having a semicircular shape that is fitted together. However, in more detail, in the present embodiment, the shape gradually changing tubular portion 62b has the inner pipe fitting tubular portion 62a in order to simplify the shape and facilitate casting.
The circular cylindrical part following is divided into two parts on the diameter, and one half part is a semi-conical shape of the damper side fitting cylindrical part 62c, and the other half part is expanded. , With the same diameter, it extends toward the damper side fitting cylinder 62c side,
The damper-side fitting tubular portion 62c is formed in a shape that is obliquely cut from the outside. In addition to this,
The one half of the diameter that expands in a semi-conical shape has the casing 22 or the outer pipe 10b extending laterally from the base end on the side of the inner pipe fitting cylinder 62a.
Bulge to the inner wall position of the
62d) to a radial position of 62c), and a shoulder portion 62d that forms a tapered inclined surface toward the damper side fitting tubular portion 62c is provided, thereby limiting the fitting of the inner pipe fitting tubular portion 62a. The airflow from the outside air passage of the double duct 10 is smoothly directed and guided to the damper air passage. Further, in the inner pipe fitting tubular portion 62a, this portion is smaller than the inner diameter of the inner pipe 10a in consideration of the ease of fitting the double duct 10 into the inner pipe 10a and the manufacturing error of the inner pipe 10a. Since it is formed with a different outer shape, an annular groove is provided and an O-ring 64 made of a rubber material is attached to the annular groove in order to ensure hermeticity.

Then, the damper assembly 20 is attached to the double duct 10.
When connecting, first, the damper side fitting tubular portion 62c of the above-mentioned flow dividing / connecting member 62 is fitted into one of the damper air passages of the damper assembly 20 to hold it, and in that state the double duct The end of the casing 22 is inserted into the outer tube 10b of 10 and connected. At the same time, the inner pipe fitting cylinder portion 62a of the flow dividing / connecting member 62 is fitted into the inner pipe 10a of the double duct 10. In addition, the connecting portion between the casing 22 and the outer tube 10b is appropriately screwed with a screw screw, and is wrapped with an adhesive tape to be sealed. Thus, the inner pipe 10a of the double duct 10
The inner air passage (inner air passage) is connected to one damper air passage through the flow dividing / connecting member 62, and the inner pipe 10 of the double duct 10 is connected.
The air passage between the a and the outer pipe 10b (the outer air passage) is a casing 22 or the inner wall of the outer pipe 10b and the shape of the flow dividing / connecting member 62.
It is connected to the other damper air passage through an air passage formed between the outer surface of 2b. That is, the inner air passage and the outer air passage of the double duct 10 and the pair of damper air passages of the damper assembly 20 are branched and connected without being mixed with each other. At this time, the conditioned air is divided into
The inner and outer surfaces of the gradually changing shape cylindrical portion 62b of the connecting member 62 smoothly guide and flow without receiving any resistance.

<Another Embodiment of the Flow Dividing / Connecting Means> FIG. 6
8 to 8 show another embodiment of the flow dividing / connecting means, and FIG. 6 is a vertical sectional view of the flow dividing / connecting means.
6 is a vertical sectional view perpendicular to FIG. 6, and FIG. 8 is a plan view of the flow dividing / connecting member.

As shown in these figures, in the flow dividing / connecting means of this another embodiment, which is generally designated by 70, the casing 22 is connected by being inserted into the outer pipe 10b of the double duct 10. The flow dividing / connecting member 72 is provided in the casing 22 so as to be in contact with the end surface of the partition plate 24.

The flow dividing / connecting member 72 is formed by sheet metal working as a generally circular cap-shaped member which is airtightly fitted in the casing 22. The diameter of the flow dividing / connecting member 72 receives the end face of the partition plate 24. Receiving groove 72a for improving air tightness
And a circular inner airflow diversion portion 72b having one side opened with the receiving groove 72a as a boundary, and a ring-shaped outer airflow diversion portion 72c having the other side opened. That is,
The inner air duct diversion unit 72b and the outer air duct diversion unit 72c respectively correspond to the inner air duct and the outer air duct of the double duct 10, and a damper assembly in which each air duct is defined by a partition plate 24. It communicates with each damper wind passage of the solid 20. A cylindrical portion 72d, which is inserted into the inner pipe 10a of the double duct 10 and is hermetically connected to the inner duct 10a of the double duct 10, is separately manufactured and fixed to the inner air duct diversion portion 72b. In addition, this inner air duct diversion unit 72b is a partition plate 2
It is formed in a bowl-like shape that bulges toward the 4 side, whereby the airflow from the inner air passage is guided more smoothly, and the area of the opening can be secured more sufficiently. Therefore, the planar shape of the end of the partition plate 24 is also a shape corresponding thereto.

When connecting the double duct 10,
First, the flow dividing / connecting member 72 is inserted into the casing 22, and the end face of the partition plate 24 is fitted and fitted into the receiving groove 72a of the caulking agent that has been previously applied. Then, as in the case of the above-described embodiment, the ends of the casing 22 are inserted into the outer pipe 10b of the double duct 10 to connect them.
At this time, at the same time, the tubular portion 72d provided in the inner air duct diversion portion 72b is also inserted into the inner pipe 10a of the double duct 10 and connected thereto. In this way, the inner air passage and the outer air passage of the double duct 10 are divided by the partition plate 24 to define the damper air passages of the damper assembly 20 and the inner air passage diversion portion 72b of the air diversion / connection member 72. And through the respective openings of the outside air duct diversion unit 72c, they are diverted and connected without being mixed with each other. Incidentally, the flow dividing / connecting member 72 can also be formed in such a form that it is fitted into the outer pipe 10a of the double duct 10, and in that case, it is first inserted into the outer pipe 10a and mounted. become.

As described above, the diversion / flow of the other embodiment is
The connecting member 72 is basically arranged to be in airtight contact with the end surface of the partition plate 24, and to the partition plate 24, the inner air duct diversion portion 72b and the outside having a communication opening formed on each side. The airflow diversion part 72c is provided, and there is an advantage that it can be manufactured in a large amount by using a suitable press die and therefore at low cost, and that it is lightweight. However, this flow dividing / connecting member 72, which is also a type of partition that blocks approximately half of the inner and outer air passages, is also used.
Is not always preferable in terms of increasing airflow resistance and inducing pressure loss, and in that respect, the flow dividing / connecting member 62 of the above-described embodiment is more preferable.

The damper device for a double duct according to the present embodiment is constructed as described above, and as shown in FIG. 9, a suspension fitting appropriately fixed to the outer surface of the casing 22 of the damper assembly 20.
It is supported via S and is connected and arranged between duct systems composed of double ducts 10. However, when one side of the duct system is composed of an independent duct leading to the blowout port or the suction port, the flow dividing / connecting means 60 on that side can be replaced with an appropriate branch joint means. Further, the damper assembly 20 itself of the present embodiment is applied to a duct system composed of a two-layer divided duct (two pipe pipe) having a central partition wall formed by extruding plastic without the flow dividing / connecting means 60. In this case, the casing 22 has a form in which the casing 22 is externally fitted and connected to the two pipes, and the end face of the partition plate 24 is in a form airtightly connected to the central partition wall.

[0043]

As described above, the damper device for a double duct according to the present invention is provided with a cylindrical casing 22 and the diameter of the casing 22, and the casing 22 is divided into two equal parts and has a semicircular cross section. Partition plate 24 that defines a pair of damper air passages
And movable blades 26 and 27 in the shape of semi-discs attached to the blade shafts 28 and 29 and rotatably arranged in the respective damper air passages, and the blade shafts 28 and 29 are rotationally controlled to form a damper. A damper assembly 20 including a damper opening / closing device 30 for opening / closing, an inner air passage formed in the inner pipe 10a of the double duct 10, an inner pipe 10a, and an outer pipe.
It is characterized in that it is provided with a flow dividing / connecting means 60 (70) for branching an external air passage formed between the damper assembly 20 and each of the damper air passages of the damper assembly 20. . (Claim 1)

Therefore, according to this damper device for a double duct, a pair of damper air passages are formed by a simple structure in which the inside of the casing 22 is divided into two equal parts by the partition plate 24, and each damper air passage is formed. Place the movable blades,
Since the flow path is opened and closed with the simplest and most general structure as a damper type, it is structurally simple as a single damper device that can control the opening and closing of the two air ducts of the double duct 10. Therefore, there is an effect that it can be easily manufactured and can be manufactured at low cost.

Further, in the damper device for a double duct of the present invention, the diversion / connection means 60 is the inner pipe 10 of the double duct 10.
A circular inner pipe fitting cylinder part 62a that airtightly fits in a and a shape gradually changing cylinder part 62b that gradually changes the shape from a circular shape to a semi-circular shape.
And a flow dividing / connecting member 62 formed of a tubular body having a damper side fitting tubular portion 62c that is airtightly fitted to one damper air passage in the damper assembly 20, and the casing 22 of the damper assembly 20 is While being inserted and connected in the outer pipe 10b of the double duct 10, the flow dividing / connecting member 62 has an inner pipe fitting tubular portion 62a of which is connected to the inner pipe 10a of the double duct 10 and a damper side thereof. The fitting tubular portion 62c is configured to be fitted and disposed in one of the damper air passages of the damper assembly 20. (Claim 2)

Therefore, according to the damper device for the double duct, the inner air passage and the outer air passage of the double duct 10 are not mixed with each other, and the shape of the flow dividing / connecting member 62 is gradually changed.
Can be shunted smoothly and can be connected to each damper air passage of the damper assembly 20. Further, when connecting to the double duct 10, since the flow dividing / connecting member 62 can be easily assembled by fitting, there is an effect that the work is easy. Further, since the casing 22 of the damper assembly 20 is inserted and connected to the outer pipe 10b of the double duct 10, there is also an effect that a good-looking external appearance without a step can be obtained.

Further, the damper assembly 20 of the present invention is provided with a cylindrical casing 22 and a diameter of this casing 22. The inside of the casing 22 is divided into two equal parts to form a pair of damper air passages having a semicircular cross section. The partition plate 24 and the movable blades 26, 27 in the form of semi-discs attached to the blade shafts 28, 29 and rotatably arranged in the respective damper air passages, and the blade shafts 28, 29 are rotated. And a damper opening / closing device 30 for opening / closing the damper by dynamic control, wherein the blade shaft is attached with a movable blade 26 in one damper air passage, and extends to the outside of the casing 22 on that side through the other damper air passage. A movable blade 27 is attached to the solid blade shaft 28 and the other damper air passage, and is a hollow blade that is fitted on the solid blade shaft 28 and extends from the other damper air passage to the outside of the casing 22 on that side. Shaft 29 and its blade shafts 28 and 29. Operation of the damper opening and closing device 30 for controlling respective pivot (operation lever 38 and 39)
However, both of them are provided outside the casing 22 on the side where the blade shafts 28 and 29 project. (Claim 3)

Therefore, according to the damper assembly 20, since the dampers for controlling the opening and closing of the two air passages are constructed as a single assembly, the damper assembly 20 is compact and easy to manufacture, and at the same time, the damper is manufactured. Since the operating portion of the opening / closing device 30 is provided on the same side outside the casing 22, there is an effect that a damper operation or the like during inspection can be easily performed.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a damper device for a double duct according to an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view of a main part of the damper assembly according to the embodiment of the present invention.

FIG. 3 is a transverse cross-sectional view of a main part of a damper assembly according to an embodiment of the present invention, the view being perpendicular to FIG.

FIG. 4 is a transverse cross-sectional view of the flow dividing / connecting means portion according to the embodiment of the present invention, the view being perpendicular to FIG.

FIG. 5 is a perspective view of the flow dividing / connecting member according to the embodiment of the present invention.

FIG. 6 is a vertical cross-sectional view of a flow dividing / connecting means portion according to another embodiment.

FIG. 7 is a vertical cross-sectional view of the flow dividing / connecting means portion of another embodiment at right angles to FIG.

FIG. 8 is a plan view of a flow dividing / connecting member according to another embodiment.

FIG. 9 is an overall external view of a damper device for a double duct according to an embodiment of the present invention.

[Explanation of symbols]

10 double duct 10a inner tube 10b outer tube 20 damper assembly 22 casing 24 partition boards 26,27 movable blades 28,29 blade axis 30 damper opening / closing device 60, 70 Dividing / connecting means 62 shunt / connecting member 62a Inner tube fitting cylinder 62b Shape gradually changing cylinder 62c Damper side fitting cylinder

Claims (3)

[Claims] 1. A cylindrical casing, and a partition plate that is provided on the diameter of the casing and divides the interior of the casing into two equal parts in the lengthwise direction to define a pair of damper air passages having a semicircular cross section. Each of the damper air passages is provided with a semicircular movable blade attached to a blade shaft and rotatably arranged, and a damper opening / closing device for controlling the rotation of the blade shaft to open / close the damper. A damper for a double duct, comprising: a damper assembly; and a flow dividing / connecting means for dividing the inner air passage and the outer air passage of the double duct to connect with each damper air passage of the damper assembly. apparatus. 2. The diversion / connection means includes a circular inner pipe fitting tubular portion that is airtightly fitted in the inner pipe of the double duct,
A gradually changing shape tubular portion that gradually changes the tubular shape from a circular shape to a semicircular shape, and a semicircular damper-side fitting tubular portion that airtightly fits in one damper air passage of the damper assembly. And a connecting member made of a hollow cylindrical body, wherein the casing of the damper assembly is inserted and connected in the outer pipe of the double duct, while the dividing / connecting member is fitted in the inner pipe thereof. The fitting cylinder portion and the damper-side fitting cylinder portion are arranged such that they are fitted in the inner pipe of the double duct and one damper air passage of the damper assembly, respectively. The damper device for a double duct according to claim 1. 3. A cylindrical casing, and a partition plate which is provided on the diameter of the casing and divides the interior of the casing into two equal parts in the lengthwise direction to define a pair of damper air passages having a semicircular cross section. In each of the damper air passages, a semi-circular movable blade attached to a blade shaft and rotatably arranged, and a damper opening / closing device for controlling the rotation of the blade shaft to open / close the damper, The blade shaft has a solid blade shaft to which the movable blade is attached in one damper air passage, extends through the other damper air passage to the outside of the casing on that side, and the movable blade in the other damper air passage. A hollow blade shaft that is attached and externally fitted to the solid blade shaft and extends from the other damper air passage to the outside of the casing on that side;
A damper assembly in which the operating parts of the damper opening / closing device for respectively controlling the rotation of the blade shafts are provided outside the casing on the side where the blade shafts extend.