JPH11281138A - Damper unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively prevent a leakage of an internal flow by maintaining stable opening and closing operation even in the case of icing or the like according to a low temperature air. SOLUTION: An opening/closing plate 14 for opening a channel hole 14a substantially aligned with a channel section of a supply channel of an upstream side is eccentrically deviated with respect to the channel section of the channel. The hole 14a is rotatably operably provided as a rotating center having a rotating locus capable of being aligned with the supply channel. The supply channel can be opened or closed and adjusted at its opening by a rotating angle of the plate 14. An auxiliary hole 14d attached with a foreign matter capturing net 14e is provided separately from the hole 14a. When the hole 14a is set to a fully closed position, the hole 14d can be operated to be associated with the channel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a damper device provided in various types of air conditioning equipment, and can be suitably used, for example, in low-temperature warehouses such as food freezers, and equipment for low-temperature spaces such as ski domes and skating rinks. In addition, the present invention relates to a damper device capable of performing a variable airflow operation.

[0002]

2. Description of the Related Art Conventionally, as a damper device provided in various types of air-conditioning equipment, air blow equipment, etc., those having various functions such as air volume adjustment, backflow prevention, flow path closing and the like are known.
From the viewpoint of the configuration, those using a rotary cascade or vanes provided in the flow path, and those using a slide type operating in the direction of opening and closing the cross section of the flow path are generally used.

[0003] Among them, those using a cascade or a vane include the cascade or the vanes themselves and their supporting members, etc., both when the flow path is fully opened and when the flow path is narrowed. Therefore, the pressure loss of the internal flow is one problem. In equipment that cannot escape such pressure loss, it is necessary to increase the output on the blower side to recover the loss, which affects power consumption and generates noise due to disturbance of the internal flow before and after the damper. .

On the other hand, in the slide type damper device, the blade-shaped damper plate is moved in a direction perpendicular to the flow path axis, so that the drive mechanism and the support member can be designed so as to be removed from the cross section of the flow path. For this reason, although the pressure loss due to the throttle determined by the opening degree of the damper plate is included, especially when the valve is fully opened, the flow path cross section is completely opened, so that the pressure loss becomes negligible, and the quiet operation is maintained.

[0005] From the above, in particular, in a damper device mainly having the functions of opening and closing the flow path and adjusting the air volume, it is advantageous to adopt a slide-type damper device only in reducing the pressure loss. ing. As described above, such a slide type damper device performs an operation of inserting and moving a damper plate into a flow path and narrowing or completely closing the flow path cross section in proportion to the insertion amount. The structure is the basis.

On the other hand, in a facility such as a low-temperature storage warehouse such as a large food freezer or a refrigerator or a skating rink, -3.
A system for supplying low-temperature air of about 0 ° C. has already been developed. This low-temperature air supply system incorporates a heat recovery exchanger during the adiabatic compression and adiabatic expansion cycle of the air, and circulates the low-temperature air after the adiabatic expansion between the refrigeration or refrigeration storage room and the skating rink room. It is to let. A damper device for adjusting the air volume and closing and closing the flow path is provided in the low-temperature air circulation pipe in the same manner as a general air conditioner. The slide type damper device is also used in the equipment for handling the low-temperature air.

[0007]

In equipment for supplying low-temperature air, the low-temperature air after adiabatic expansion flows through the internal flow path of the damper device, so that the surface of the damper plate and the peripheral members freeze. Then, as the frozen layer grows on the inner wall of the flow path, the cross section of the flow path becomes gradually smaller, and the pressure loss increases. In addition, the surface of the frozen layer is not a uniform and smooth surface, and the pipe friction coefficient increases compared to the inner wall of the pipeline,
The flow path resistance also increases. Therefore, in normal times, the damper plate is fully opened for operation, but in order to eliminate such an obstacle due to icing, it is necessary to close the damper plate and supply warm air into the pipeline to remove icing.

However, when the damper plate is closed during the supply of the warm air, the surface and the supporting member are frozen, so that the reliability of the movement of the damper plate is impaired. That is, in the slide type damper plate, a structure is adopted in which a slide groove or the like is provided on the pipe side to guide the slide damper plate and the edge of the damper plate is inserted therein, but if the inside of the slide groove freezes. The damper plate cannot move. For this reason, in order to move the damper plate, it is necessary to apply a considerably strong external force, and it is necessary to provide a motor with a large capacity, a booster mechanism, and the like.

Even in the case of a slide type damper, if the damper plate is sealed by abutting against the end face or flange of the upstream pipeline opposite to the storage, leakage of hot air supply for removing icing can be prevented. Occurrence can be prevented. Also,
Even when adjusting the flow rate of the low-temperature air, the seal is secured, so that the flow rate adjustment can be optimized in accordance with the amount of movement of the damper plate.

However, since the damper plate is incorporated by using the above-described slide groove or the like, the position of the damper plate in the direction of the flow path is restricted, but a clearance is provided between the damper plate and the slide groove so that the damper plate can slide. It is necessary to have. If there is such a clearance, the damper plate may not exactly contact the end face or the flange of the pipeline, and a gap may be formed. Therefore, the warm air supplied during the icing removal leaks and the thawing time is prolonged, and the flow rate adjustment when sending low-temperature air is impaired in accuracy. Also, if the warm air leaks during the icing removal, the temperature of the storage side and the skating rink room rises, not only causing energy loss but also damaging the stored food, especially in the case of a food storage. Will be.

As described above, the conventional slide-type damper device has an advantage that the pressure loss on the internal flow is small when the damper device is fully opened. However, when the low-temperature air is used, the reliability of the operation is uncertain. In addition, there is a problem that leakage occurs even when the inside of the flow path is completely closed.

An object of the present invention is to provide a damper device which can maintain a stable opening / closing operation even when freezing due to low-temperature air or the like and can surely prevent leakage of an internal flow.

[0013]

SUMMARY OF THE INVENTION The present invention relates to a damper device which is incorporated in the middle or at the end of a supply flow path for a fluid such as air or gas, wherein the damper device is provided with either an upstream or downstream supply flow path. An opening / closing plate having a flow passage hole substantially aligned with the flow passage cross section, wherein the opening / closing plate is eccentric with respect to the flow passage cross section of the supply flow passage and the flow passage hole can be aligned with the supply flow passage. A rotation center having a rotation locus is provided so as to be rotatable, and the supply channel can be opened and closed and the opening degree can be adjusted by the rotation angle of the opening and closing plate.

With such a configuration, when the flow path hole of the opening / closing plate is aligned with the supply flow path and the flow path is set to be fully open, there is no obstacle in the opened flow path. A fluid flow path without pressure loss is obtained.

In the present invention, the opening and closing plate is
An opening-shaped auxiliary hole formed at a position different from the flow path hole and included in at least a part of the flow path cross section when the flow path hole deviates from the flow path cross section of the supply flow path, The auxiliary hole may be provided with a net for collecting foreign matter in the supply flow path.

In this configuration, when foreign matter such as dust or frozen ice is present in the supply flow path, the supply flow can be adjusted by turning the opening / closing plate so that the auxiliary hole provided with the net matches the cross section of the supply flow path. Foreign matter contained in the road can be collected and collected, and foreign matter can be prevented from entering a facility such as a terminal room.

A housing for housing the open / close plate and rotatably supporting the open / close plate is connected to the supply passage, and a rotation for transmitting rotation to the open / close plate in cooperation with the open / close plate inside the housing. A transmission means may be provided.

With this configuration, even if fluid leaks from between the end face of the supply flow path and the opening / closing plate, the fluid can be collected in the housing, and leakage to the outside is prevented.

The rotation transmitting means is formed on a peripheral surface of the opening / closing plate and concentric with a center of rotation of the rotation transmitting means. The rotation transmitting means is rotatably supported on the housing side and meshes with the spur gear and receives external rotation. And a pinion that is driven to rotate by operation. In this case, a drive motor for rotationally driving the pinion may be provided outside the housing.

In this configuration, the spur gear can be rotated by the pinion and the spur gear when the drive motor is operated. If the pinion has a small diameter and the pitch circle of the spur gear is formed large, the reduction ratio of the open / close plate can be reduced. Can be set large,
The rotation torque of the opening / closing plate can be increased.

Further, the opening / closing plate is formed in a disk shape in which the flow path holes are eccentrically arranged, and the spur gear has an outer diameter of a tooth tip circle smaller than an outer circle of the opening / closing plate, and the flow path hole is formed in a circular shape. It may be formed on a part of the peripheral surface of the open / close plate as a circumferential length corresponding to a rotation angle from a position aligned with the supply flow path to a position not aligned with the supply flow path.

In this configuration, even if the opening / closing plate has a large diameter, the pinion can be made closer to the center side of the opening / closing plate because the spur gear portion has a small tip circle, so that the composite of the opening / closing plate and the pinion is formed. The bulk can be reduced, and the housing for housing them can also be reduced in size.

[0023] Further, the boundary between both ends in the tooth row direction of the spur gear and the outer peripheral surface of the outer periphery of the opening / closing plate is an engaging portion which is a surface included in a plane in the radial direction. May be provided with stoppers which are arranged with the pinion interposed therebetween and abut against each of the engaging portions, so that each set of engaging portions and the stopper can be engaged when the opening / closing plate is fully opened and fully closed. .

In this configuration, the position of the opening and closing plate and the position of the opening can be restrained by the stopper and the engagement portion. When the opening and closing plate are fully opened, the alignment between the flow path hole and the supply flow path is maintained. Complete interruption of the flow path is guaranteed.

The housing may be provided with a restraining mechanism for restraining the position of the opening / closing plate and holding the end face of the supply flow path and the seal.

In this configuration, even if the damper device is installed in a horizontal, vertical or oblique posture, the opening and closing plate is always set to the sealing posture by the restraining mechanism, thereby preventing unnecessary leakage of the fluid.

[0027] Such a restraining mechanism comprises a support shaft rotatably connected to the open / close plate and having a degree of freedom in the axial direction, and a coaxially arranged support shaft for moving the open / close plate upstream or downstream. And a receiving seat that elastically biases toward one of the end faces of the supply flow path on the side.

In this configuration, the opening / closing plate is brought into close contact with the end face of the supply flow path on the upstream side or the downstream side by elastic biasing, so that the sealing property is maintained, and the end face of the supply flow path is maintained even when the opening / closing plate rotates. The copying operation can be performed along the shape.

The restricting mechanism is a guide capable of restricting the attitude of the open / close plate by abutting at least one of the front and back surfaces of the open / close plate, and the guide corresponds to at least the rotating direction of the open / close plate. The profile may be a circle outline or a spherical outline.

In this configuration, if the opening / closing plate is constrained by a guide in a plane perpendicular to the rotation axis, the opening / closing plate can be stably maintained, and the adhesion of the supply flow path to multiple surfaces can be improved. be able to.

Further, the opening and closing plate may have a surface coated or coated with a water-repellent synthetic resin.

In this case, icing is prevented by the water-repellent action of the water-repellent synthetic resin even when handling low-temperature air, and since the thermal conductivity of the synthetic resin is lower than that of metal, icing is prevented by the heat insulating action. Becomes possible. Therefore, for example, even when low-temperature air is used as a fluid, icing on the surface of the opening / closing plate can be suppressed, and an obstacle due to icing when the opening / closing plate rotates can be eliminated.

[0033]

FIG. 1 is a longitudinal sectional view of an essential part showing an embodiment of a damper device of the present invention, FIG. 2 is a perspective view of an internal structure viewed from an upstream side, and FIG. 3 is an exploded view of the essential part. It is a perspective view. In this embodiment, a system for supplying low-temperature air having a minus temperature to a storage facility such as a food freezer will be described.

In the figure, a damper device 1 of the present invention is incorporated between an upstream pipe 100 connected to a heat exchange system for sending out low-temperature air and a downstream pipe 101 connected to an air outlet of a food freezer. I have. This damper device 1
As shown in FIG. 3, a housing is constituted by a flat tub-shaped base plate 2 and a cover plate 3 fixed integrally thereto.

The base plate 2 is provided with a connection flange 2a for connecting to the downstream pipe 101 on the outer surface and a mount plate 2b on the inner surface. The mount plate 2b is connected to a flow path ring 2c that enters the connection flange 2a.
On the other hand, the cover plate 3 is also provided with a connection flange 3a on the outer surface, and a mount plate 3b integrally fixed with a flow path ring 3c that enters the connection flange 3a. When these base rings 2c and 3c connect the base plate 2 and the cover plate 3,
As shown in FIG. 1, a coaxial arrangement is used, and a small gap is formed between the respective butting surfaces 2 c-1 and 3 c-1.

Here, a drain 2d is provided on the bottom side of the base plate 2 in case that the surface of an opening / closing plate (to be described later) or the inside of the housing is frozen to defrost or defrost by a warming operation. Since the ice or frost in the channel rings 2c, 3c is turned into water by the warm air, the channel rings 2c, 3c are removed as shown in FIG.
Drain notches 2c-2 and 3c-2 are provided at the lower ends of the butting surfaces 2c-1 and 3c-1 of c, respectively. Moreover, in order to make it easy for water to collect in these drain notches 2c-2 and 3c-2, the drain notches 2c are formed on the inner peripheral surfaces of the flow passage rings 2c and 3c as shown in FIG.
-2c, a slope 2c that becomes a downward slope toward 3c-2
-3, 3c-3 are formed.

Such drain notches 2c-2, 3c
-2 and the inclined surfaces 2c-3, 3c-3, the water in the flow passage rings 2c, 3c and the downstream and upstream flow passages can be collected in the housing, and if the drain 2d is opened, This water can be discarded outside.

The base plate 2 has flow passage rings 2c, 3c
The open / close plate 4 having a large thickness that enters the gap between the butting surfaces 2c-1 and 3c-1 is rotatably connected. As shown in FIGS. 2 and 3, the open / close plate 4 is formed with a spur gear 4a having a subarc length in which the radius of a part of the outer peripheral surface is slightly shorter than that of the other part. A mounting hole 4b is provided at the center of the opening / closing plate 4, and a flow path hole 4c is opened at a position eccentric to the mounting hole 4b. The flow path hole 4c has the same size as the inner diameter of the flow path rings 2c and 3c, and when the opening / closing plate 4 is in the attitude shown in FIG. 2, the flow path holes 2c and 3c are aligned with the flow path holes 2c and 3c. That is, as shown in FIG.
Are coaxial with the flow pipes 2c and 3c, and form a flow channel inner wall having a uniform cross section from the upstream side to the downstream side.

At both ends of the spur gear 4a of the opening / closing plate 4 in the tooth row direction, engaging portions 4d and 4e extending in the radial direction between the outer peripheral surface of the opening / closing plate 4 are provided. These engagement portions 4d and 4e are for restraining the opening / closing plate 4 to a fully open position and a fully closed position together with a stopper provided on the base plate 2 side, as described later.

Further, on both front and back surfaces of the opening / closing plate 4, ice and frost due to low-temperature air are hardly generated to suppress icing and prevent freezing between other members. When water is frozen, it is coated or lined with a water-repellent resin so that the ice is easily peeled off. There are various types of water-repellent resins, for example, tetrafluoroethylene is preferable.

In order to support the opening / closing plate 4, a support shaft 5a is provided between the base plate 2 and the cover plate 3, as shown in FIG. 5, and a support urged by a compression coil spring 5c is provided on the base plate 2 side. The seat 5b is provided. The support shaft 5a is inserted into the mounting hole 4b, and has an outer diameter that rotatably supports the opening / closing plate 4. Also, seat 5
Reference numeral b denotes an externally mounted movable shaft which is movable on the support shaft 5a, and urges the open / close plate 4 to the left side in the figure by a coil spring 5c. And this seat 5b
, The opening / closing plate 4 is pressed against the butted surface 3c-1 of the flow path ring 3c to be sealed.

Although a notch 3c-2 for draining is open at the butting surface 3c-1, the notch 3c-1 for draining may be small enough to allow water to flow out. Leakage of low-temperature air from the road can be reduced. This is the same in the case of the notch 2c-2 for draining the flow path ring 2c on the downstream side.

Further, in order to suppress run-out and bending of the opening and closing plate 4 during rotation, as shown in FIG. 1, the base plate 2 and the cover plate 3 are provided with spherical receivers 6 and 7 as guides, respectively. These spherical receivers 6, 7 have a built-in spring (not shown) smaller than the spring constant of the coil spring 5c after the seat, and urge the rollable balls 6a, 7a outward by the springs. It is. These spherical receivers 6 and 7 are located so as to correspond directly above the center of the assembled opening / closing plate 4.

Further, in order to further stabilize the posture of the opening / closing plate 4, a plurality of spherical receivers 6 and 7 can be arranged. That is, in this example, as shown in FIG. 2, two slide receivers 8 are provided on the mount plate 2b on the base plate 2 side as guides, and these slide receivers 8 are opposed to the same position on the mount plate 3b on the cover plate 3 side. Provide a receiver. Instead of the combination of the spherical receivers 6, 7 and the slide receiver 8, a plurality of spherical receivers alone or a plurality of slide receivers may be provided. In short, a plurality of guides that support the opening / closing plate 4 at points may be provided at appropriate positions.

FIGS. 6A and 6B show details of the slide receiver 8, in which FIG. 6A is a longitudinal sectional view of a main part as viewed in the rotating direction of the opening / closing plate 4, and FIG. FIG.

The slide receiver 8 has a pedestal 8a fixed to the mount plate 2b, a slide guide 8b capable of protruding and retracting from the surface thereof, and a spring housed in the pedestal 8a to bias the slide guide 8b outward. 8c. The slide guide 8b has an arcuate surface in contact with the opening / closing plate 4 as shown in FIG. 3B, and frictionally comes in line contact with the opening / closing plate 4 moving in the direction of the arrow in the drawing. Is reduced.

Further, the spur gear 4a of the opening / closing plate 4 is attached to the base plate 2 in order to rotate the opening / closing plate 4.
A drive motor 10 for rotating the pinion 9 is provided on the cover plate 3.
Attach. As shown in FIG. 1, the pinion 9 is rotatably supported by a support shaft 9a fixed to the base plate 2,
It is connected to a coupling 10a connected to the output shaft of the drive motor 10 in a coaxial arrangement with the support shaft 9a.

As shown in FIG. 2, a pair of stoppers 11a and 11b are provided on both sides of the pinion 9, and the stoppers 11a and 11b are brought into contact with the engaging portions 4d and 4b of the rotating plate 4 to rotate the opening / closing plate 4. Restrain.

The drive motor 10 has its output shaft rotatable in the forward and reverse directions. For example, an operation panel is provided on the outer surface of the base plate 2 to set the direction of rotation so that the opening and closing plate 4 can open and close the flow path. Do. In addition, the temperature of a room or the like to which the air is supplied from the downstream pipe 101 is detected, and the detection signal is fed back to execute the control based on the variable air flow (VAV) method in which the opening degree of the flow path by the opening / closing plate 4 is set. Is also good. Further, by detecting the difference between the internal pressures on the upstream side and the downstream side with respect to the opening / closing plate 4 and detecting the degree of restriction of the flow path by detecting the opening degree of the opening / closing plate 4, the opening / closing plate 4 The flow rate based on the restriction of the flow path may be detected, and similarly, the flow rate may be controlled by feedback control to maintain a predetermined flow rate value.

Here, as shown in FIG. 2, the opening / closing plate 4 has an outer diameter which overlaps with the channel rings 2c, 3c when the opening / closing plate 4 is assembled around the support shaft 5a passing through the mounting hole 4b. In FIG. 2, the opening / closing plate 4 is in a fully open state with the flow passage holes 4 c aligned with the flow passage rings 2 c and 3 c, and the flow passage from the upstream pipe 100 to the downstream pipe 101 is open.

On the other hand, the opening / closing plate 4 has a receiving seat 5b and a coil spring 5 shown in FIG.
The urging force c pushes against the butting surface 3c-1 of the upstream channel ring 3c. Therefore, the opening / closing plate 4 seals the flow path ring 3c well, and prevents leakage of low-temperature air and the like from the flow path into the damper device 1 formed by the base plate 2 and the cover plate 3. Also, as shown in FIG. 5, even if the clearance between the butting surfaces 2c-1 and 3c-1 of the flow passage rings 2c and 3c is made larger than the thickness of the opening / closing plate 4, the assembly is performed. Later, the opening / closing plate 4 is held at a position where it contacts the flow path ring 3c by the receiving seat 5b. That is, the open / close plate 4 is made using the elastic deformation of the coil spring 5c.
Can be surely abutted against the flow path ring 3c, and a design in which the assembling accuracy of the flow path rings 2c and 3c is set gently becomes possible.

In the above configuration, when the drive motor 10 is operated to rotate the pinion 9 in the direction of the arrow in FIG. 2, the opening / closing plate 4 rotates counterclockwise by meshing with the spur gear 4a.

FIG. 7 is a schematic view showing the process of rotating the opening / closing plate 4 from the fully opened state to the fully closed state. In FIG. 7A, the flow path hole 4c moves clockwise from the fully opened state. When rotated, the alignment with the flow channel rings 2c and 3c gradually releases as shown in (b) and (c) of the same figure, and the flow channel is narrowed. Then, when pivoting to the position shown in FIG.
b has no connection with the channel rings 2c, 3c, the entire circumference of the abutting surface 3c-1 of the channel ring 3c is sealed by the opening / closing plate 4, and the channel is shut off. When the flow path is opened from the fully closed state, the rotation of the output shaft of the drive motor 10 is reversed and the rotation angle is set so that the required flow path area is obtained. ) Can be returned to the almost half-opened state or the fully opened state shown in FIG.

In the fully opened state, FIG. 7A and FIG.
As shown in the figure, the stopper 11a engages with the engaging portion 4d,
In the fully closed state, the other set of stoppers 11b is engaged with the engaging portion 4e as shown in FIG. 7D. Therefore, when the pinion 9 is fully opened and fully closed, the rotation of the pinion 9 is stopped while the stoppers 11a and 11b and the engaging portions 4d and 4e are restrained, so that the opening / closing plate 4 moves unnecessarily. Therefore, the fully open and fully closed flow paths are reliably held.

The flow rate can be adjusted not only by opening / closing the flow path by rotating the opening / closing plate 4 but also by changing the flow path area as shown in FIGS. 7B and 7C, for example. is there. Therefore, as described above, VA
If the V unit is configured with a temperature sensor or the like on the storage side, it is possible to control to change the supply amount of low-temperature air in accordance with a change in the internal heat load on the storage side.

Here, in the fully opened state of FIGS. 2 and 7A, the flow passage hole 4c of the opening / closing plate 4 is aligned with the flow passage rings 2c, 3c, and therefore the members that interfere with the flow passage cross section are Not at all. Therefore, the pressure loss of the low-temperature air when passing through the damper device 1 can be suppressed to almost negligible level, there is no need to increase the output capacity on the blowing side, and the laminar flow can be maintained, so that quiet operation is maintained.

In the fully opened state, only the inner peripheral surface of the flow path hole 4c comes into contact with the low-temperature air.
And the support shaft 5a and the receiving seat 5b are not exposed to the low-temperature air. As shown in FIG. 5, there is a clearance between the opening / closing plate 4 and the abutting surface 2c-1 of the flow path ring 2c, but the opening area is small.
Leakage of low-temperature air can be suppressed to a small amount. And
Actually, since the low-temperature air is passed through the high-speed flow, a flow field in which external air is drawn from the clearance by the ejector effect is generated, and substantially no low-temperature air leakage occurs.

From the above, when in the fully open state, only the inner periphery of the flow passage hole 4c and its vicinity are frozen by the low-temperature air, and the open / close plate 4 of the other portion is frozen.
Although the temperature of the shaft 5a and the receiving seat 5b is low, no frost or icing occurs. Therefore, for example, in the case where the growth of ice in the pipeline is broken by warm air, when the opening / closing plate 4 is rotated in the closing direction, the flow path hole 4c
It is only necessary to have the power to shake off the slightly frozen part of the part.

The opening / closing plate 4 is rotated by the drive of the pinion 9. For example, the gear is not formed at the center portion but the large-diameter spur gear 4a is provided at a position close to the outer peripheral surface. I can take it big. Therefore, the rotation torque of the opening / closing plate 4 can be increased, and the icing at the time of full opening can be quickly shaken off to rotate the opening / closing plate 4 without increasing the capacity of the drive motor 10.

In the half-open state shown in FIGS. 7B and 7C, the front and back surfaces of the opening / closing plate 4 in the portion overlapping the flow path rings 2c and 3c come into contact with the low-temperature air to freeze and abut. Freezing occurs between the surfaces 2c-1 and 3c-1. Even in this case, since the rotation torque of the opening / closing plate 4 is sufficient, the opening / closing plate 4 can be rotated in the fully open or fully closed direction without causing a malfunction.

Further, the frozen surface of the opening / closing plate 4 is
Since it rotates while contacting the contact surface 3c-1 of c, when the frozen meat is thick, it comes to ride on the contact surface 3c-1. On the other hand, since the opening / closing plate 4 is urged by the coil spring 5c and is held by the spherical supports 6, 7 and the slide receiver 8, both of which are elastically supported, the opening / closing plate 4 can follow the thickness of the frozen surface. it can. Therefore, the opening / closing plate 4 can be rotated without the freezing surface interfering with the end surface 3c-1.

Since the opening / closing plate 4 seals the flow path ring 3c side and the clearance on the flow path ring 2c side is also small from the time of full opening to the time of full closing, leakage of low-temperature air is extremely small. For this reason, icing of the spherical bearings 6 and 7, the pinion 9 and the spur gear 4 a stored in the base plate 2 and the cover plate 3 can be suppressed, and the opening and closing plate 4
There is no hindrance to launching.

FIG. 8 shows another example of the damper device.
FIG. 3 is a perspective view of the internal structure as viewed from the upstream side of the supply flow path, similarly to FIG.

In this example, only the opening / closing plate has a different structure. The same members in the examples shown in FIGS. 1 to 7 are designated by the same reference numerals, and detailed description thereof will be omitted. .

In the drawing, an opening / closing plate 14 is rotatably supported by a support shaft 5a which is bridged between respective mount plates 2b (3b: not shown) of a base plate 2 and a cover plate (3: not shown). Have been. The opening / closing plate 14 has a disk shape made of a metal plate having the same thickness as that of the above-described example, and has a spur gear 14a meshing with the pinion 8 formed on the entire length 9 of the outer peripheral surface thereof. is there. The supporting structure of the opening / closing plate 14 in the housing is exactly the same as the example shown in FIG. 1, and is supported by a combination of the spherical receivers 6, 7 and the slide receiver 8, and is provided on the end face of the upstream flow path ring 3c. It is held in close contact.

FIG. 9 shows the details of the opening / closing plate 14.
(A) of the figure is a front view seen from the upstream side, and (b) of the figure is a longitudinal sectional view taken along the line AA of the figure (a).

The opening / closing plate 14 is provided at its center with a mounting hole 14b for passing the support shaft 5a, and the flow path rings 2c, 3c.
c is provided with a passage hole 14c of a size that exactly matches c. This configuration is exactly the same as the previous example. The only difference is that an auxiliary hole 14d is provided in addition to the flow path hole 14c, and that a spur gear 14a is formed all around.

The auxiliary hole 14d has the same inner diameter as the flow path hole 14c, the same amount of eccentricity from the center of the opening / closing plate 14, and the center angle with the flow path hole 14c is slightly larger than 90 °. It is. Therefore, when the opening / closing plate 14 is rotated counterclockwise by the central angle in FIG. 9A, the auxiliary hole 14d is aligned with the flow path rings 2c, 3c instead of the flow path hole 14c. Can be.

Further, the auxiliary hole 14d has a mesh 1 having a mesh size large enough to collect foreign matter, frost and the like in the flow path.
4e is provided so as to be developed all over. For this net 14e, for example, a metal net can be used, and as shown in FIG. 9B, a slit 14d cut in the inner periphery of the auxiliary hole 14d.
-1 and fixed. Therefore, the net 14e can be configured to be included in the thickness of the opening / closing plate 14, and as shown in FIG.
Even if the net 14e is interposed between the open / close plates c, the upstream surface of the opening / closing plate 14 can be brought into contact with the end surface of the flow path ring 3c.

Here, in FIG.
The fourth flow path hole 14c is aligned with the flow path rings 2c and 3c, the flow path is fully opened, and the auxiliary hole 14d is located at a position off the left side of the flow path rings 2c and 3c. When the pinion 9 is rotated by the drive motor 10 to rotate the opening / closing plate 14 clockwise as shown in FIG.
c shifts to the left, and the flow path is narrowed. When the opening and closing plate 14 is further rotated, the flow path hole 14c is completely disengaged from the flow path rings 2c and 3c as shown in FIG.
The flow path is completely closed and shut off. Also, FIG.
When the opening / closing plate 14 is rotated counterclockwise from the fully opened state or clockwise from the fully closed state shown in FIG. 4C, the auxiliary holes 14d are connected to the channel rings 2c and 3c as shown in FIG. The alignment is performed, and the net 14e faces outside.

As described above, the rotation angle of the opening / closing plate 14 allows the flow path to be fully closed and fully opened and the flow path to be throttled between them can be operated, and the flow path can be connected by the auxiliary hole 14d. Then, by aligning the auxiliary holes 14d with the channel rings 2c and 3c, the net 14e is formed in the channel.
Is located, the net 14e can be used as a filter for collecting foreign matter.

When the auxiliary hole 14d has the same size as the flow passage hole 14c, there is no pressure loss other than the resistance of the net 14e when the auxiliary hole 14d is installed in the flow passage. It is preferable from the viewpoint of the influence on the output. However, the auxiliary hole 14d does not necessarily have to be aligned with the flow path rings 2c and 3c, and the size included in the flow path rings 2c and 3c when it is at the position shown in FIG. Should be fine.

Here, as described above, in a warm-up operation in which defrosting is periodically performed to remove icing from the pipeline and the damper device 1 itself, the upstream pipe 100 (after closing the open / close plate 14 completely). Defrosting is performed by supplying warm air to FIG. 1).
Thereafter, a pre-cooling operation is performed with the opening / closing plate 14 closed so that the flow path is sufficiently cooled so that the high-temperature air remaining in the flow path does not flow into the storage side. Then, the opening / closing plate 14 is set to the fully opened state and the operation is returned to the normal operation. However, the moisture remaining in the flow path on the upstream side becomes ice crystals during the precooling operation, and the crystals enter the normal operation. Sometimes it may be discharged to the storage side.

On the other hand, if the auxiliary hole 14d is communicated with the flow path and the net 14e is positioned in the flow path as shown in FIG. 10D before the flow path after the precooling operation is fully opened, Ice crystals and the like generated during the precooling operation can be collected. Therefore, when all the ice in the flow channel can be collected by this collection, an operation of fully opening the flow channel hole 14c prevents ice crystals and the like from entering the storage.

The ice crystals and other foreign matters collected by the net 14e are provided with a collection door 2e on the base plate 2 as shown in FIG. 8, for example, and the collection door 2e is opened when necessary. What is necessary is just to clean the net 14e.

On the other hand, in the case of building a new building or repairing an air conditioner, a step of discharging dust accumulated in the air conditioner and the duct after the piping work of the duct behind the ceiling is performed. In this step, the air conditioner is continuously operated for several days, and the operation is switched to the normal operation after the emission of dust is confirmed.

In discharging such dust, FIG.
In the case of the damper device described in (1), dust and other foreign matter can be collected by the net 14e if the auxiliary hole 14d is positioned in the flow path and the air is scavenged when the dust is discharged. Then, after the collection, if the opening / closing plate 14 is rotated to the fully opened state, it is possible to immediately switch to the steady operation. Also, not only at the time of new construction,
Foreign matter contained in the flow path can be collected even by regular operation, so that it can be prevented from flowing into the indoor side,
A comfortable air-conditioning environment is maintained.

[0078]

According to the first aspect of the present invention, when the flow path hole of the opening / closing plate is aligned with the supply flow path and the flow path is set to be fully open, there is no obstacle in the opened flow path. In addition, there is no pressure loss and noise can be suppressed, and there is no need to provide a facility for raising the air supply head on the fluid supply side to match the pressure loss due to the damper.

According to the second aspect of the present invention, if the operation of connecting the flow path by an auxiliary hole instead of the flow path hole is performed, for example, in the case of equipment having a freezing storage at the end, it occurs at the time of pre-cooling after the warm-up operation. In a frozen ice or the like or ordinary air conditioning equipment, foreign substances such as dust contained in the flow path can be collected by the net, and blowing of the foreign substances into the frozen storage can be prevented.

According to the third aspect of the present invention, since the opening / closing plate is housed in the housing, even if fluid leaks from between the end face of the supply channel and the opening / closing plate, leakage to the outside is prevented, and low-temperature low-temperature air It can be used safely even in facilities that handle etc.

According to the fourth and fifth aspects of the present invention, if the diameter of the pinion rotatably driven by the drive motor is small and the pitch circle of the spur gear is large, the reduction ratio of the open / close plate is increased to increase the rotational torque of the open / close plate. Can be increased, and even if the surface of the opening / closing plate or its sealing surface freezes, the plate can be quickly rotated to ensure stable operation even in an emergency.

According to the sixth aspect of the present invention, since the pinion can be made closer to the center of the opening / closing plate, the size of the housing for housing the opening / closing plate can be reduced, and retrofitting to an existing air conditioner is also possible.

According to the seventh aspect of the present invention, the fully open and fully closed positions of the open / close plate are restrained by the stopper and the engaging portion. Can be suppressed, and when fully closed, leakage of fluid is prevented by completely blocking the flow path.

According to the invention of claim 8, the damper device is horizontal,
Even if it is installed vertically or obliquely, the opening / closing plate is always set to the sealing position by the restraint mechanism, preventing unnecessary leakage of fluid, and it can cope with various construction conditions and accompanies construction errors. Even a fluid seal is guaranteed.

According to the ninth aspect of the present invention, since the opening / closing plate is elastically urged, the sealing property with respect to the supply flow path can be kept high. Therefore, even if icing or the like occurs, the opening / closing plate can be operated quickly. Further, regardless of whether the mounting position of the damper device is horizontal, vertical, or oblique, the opening / closing plate can be restrained in a sealing direction by elastic biasing, so that a stable seal can be obtained irrespective of construction conditions.

According to the tenth aspect of the present invention, since the opening / closing plate can be stably maintained in a plane perpendicular to the rotation axis thereof by, for example, a guide utilizing a spherical receiver or the like, the adhesion to the supply flow path side is improved. To prevent fluid leakage.

According to the eleventh aspect of the present invention, the surface of the opening / closing plate is coated or lined with a water-repellent synthetic resin, so that freezing on the surface of the opening / closing plate can be suppressed even when low-temperature air is used as a fluid. In addition, it is possible to eliminate an obstacle caused by icing when the opening / closing plate rotates.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a main part of a damper device according to the present invention.

FIG. 2 is a perspective view of the internal structure of the damper device as viewed from the upstream side.

FIG. 3 is an exploded perspective view showing a main part of the damper device.

FIG. 4A is a perspective view showing a drainage notch provided in a flow path ring, and FIG. 4B is a longitudinal sectional view of a main part showing an aspect of a downwardly inclined surface provided in a drainage notch portion. It is.

FIG. 5 is a schematic longitudinal sectional view of a main part showing a support structure of an opening / closing plate.

6A and 6B are details of a slide receiver for stably supporting the opening / closing plate, wherein FIG. 6A is a longitudinal sectional view of a main part viewed from a rotation direction of the opening / closing plate, and FIG. 6B is a bottom view of FIG. It is.

FIG. 7 is a schematic view showing a rotation operation of an opening / closing plate.

FIG. 8 is a perspective view of a damper device having an auxiliary hole with a net in an opening / closing plate as viewed from the upstream side.

9A and 9B are details of an opening / closing plate provided in the damper device of FIG. 8, wherein FIG. 9A is a front view as viewed from the upstream side, and FIG. 9B is an enlarged longitudinal sectional view taken along line AA of FIG. It is.

FIG. 10 is a schematic view showing full opening, narrowing, full closing, and communication of auxiliary holes by rotation of an opening / closing plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Damper device 2 Base plate 2a Connection flange 2b Mount plate 2c Flow path ring 2c-1 Butt surface 2c-2 Notch for draining 2c-3 Inclined surface 3 Cover plate 3a Connection flange 3b Mount plate 3c Flow path ring 3c-1 Butt surface 3c-2 Drain notch 3c-3 Inclined surface 4 Opening / closing plate 4a Spur gear 4c Mounting hole 5a Support shaft 5b Receiving seat 5c Coil spring 6,7 Spherical receiving 8 Slide receiving 9 Pinion 10 Drive motor 11a, 11b Stopper 14 Opening / closing plate 14a Spur gear 14b Mounting hole 14c Channel hole 14d Auxiliary hole 14e Net 100 Upstream pipe 101 Downstream pipe

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yukio Kuno Fukuoka Prefecture Kasuya-gun, Oguri 1034-4 Oda, Kashiwa-cho Inside (72) Inventor Keiichi Kondo, Fukuoka Prefecture Kasuya-gun, Ogada 1034-4 Oda Inside Airtech Co., Ltd.

Claims (11)

[Claims] 1. A damper device which is installed in the middle or at the end of a supply flow path for a fluid such as air or gas, wherein the flow path substantially matches the flow path cross section of either the upstream or downstream supply flow path. An opening / closing plate having a passage hole is provided, and this opening / closing plate is eccentric with respect to the flow path cross section of the supply flow path, and the flow path hole is a rotation center having a rotation locus that can be aligned with the supply flow path. A damper device which is provided so as to be rotatable and which can adjust the opening and closing and the opening degree of the supply flow path by the rotation angle of the opening / closing plate. 2. The opening / closing plate is formed at a position different from the flow path hole, and at least a part of the flow path cross section when the flow path hole deviates from the flow path cross section of the supply flow path. 2. The damper device according to claim 1, further comprising an auxiliary hole having an opening shape included therein, wherein the auxiliary hole includes a net for collecting foreign matter in the supply flow path. 3. A housing for housing the opening / closing plate and rotatably supporting the opening / closing plate connected to the supply passage, and rotating inside the housing in cooperation with the opening / closing plate to transmit rotation to the opening / closing plate. 3. The damper device according to claim 1, further comprising a transmission unit. 4. A spur gear formed on a peripheral surface of the opening / closing plate and concentric with a center of rotation of the opening / closing plate;
4. The damper device according to claim 3, further comprising a pinion rotatably supported by the housing, meshing with the spur gear, and driven to rotate by an external operation. 5. The damper device according to claim 4, wherein a drive motor for rotating and driving the pinion is provided outside the housing. 6. The open / close plate has a disk shape with the flow path holes eccentrically arranged, and the spur gear has a tip circle whose outer diameter is smaller than an outer circle of the open / close plate and the flow path holes. The damper device according to claim 4 or 5, wherein a damper device is formed on a part of a peripheral surface of the opening / closing plate as a circumferential length corresponding to a rotation angle from a position aligned with the supply flow path to a position not aligned with the supply passage. 7. An engaging portion in which a boundary between both ends in the tooth row direction of the spur gear and the outer peripheral surface of the opening / closing plate is a surface included in a plane in a radial direction. 7. The apparatus according to claim 6, further comprising: a stopper arranged to sandwich the pinion and abutting against each of the engaging portions, so that each of the pair of engaging portions and the stopper can be engaged when the opening and closing plate is fully opened and fully closed. Damper device. 8. The housing according to claim 3, wherein the housing is provided with a restraining mechanism for restraining a posture of the opening / closing plate and holding a seal with an end face of the supply flow path. Damper device. 9. The restraining mechanism comprises: a support shaft rotatably connecting the open / close plate and having a degree of freedom in an axial direction; and a coaxial arrangement with the support shaft and moving the open / close plate upstream or downstream. The damper device according to claim 8, further comprising: a receiving seat that elastically urges one of the end surfaces of the supply passage on the side. 10. The restricting mechanism is a guide capable of restricting the attitude of the opening / closing plate by abutting at least one of the front and back surfaces of the opening / closing plate, and the guide corresponds to at least a rotating direction of the opening / closing plate. The damper device according to claim 8, wherein the profile is a circle outline or a spherical outline. 11. The damper device according to claim 1, wherein said opening / closing plate has a surface coated or coated with a water-repellent synthetic resin.