JP2018185132A - Air volume adjusting damper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air volume adjusting damper capable of preventing wet ceiling caused by dew condensation by suppressing cooling of a member occurring by air leakage in a damper closing state, in the damper connected to an air conditioning duct and the like and used for air volume adjustment.SOLUTION: An air volume adjusting damper includes: a housing 1 having an air passage inside; and a damper structure 2 in which an air passage area in the housing can vary. The damper structure 2 comprises: an opening/closing mechanism part 7 inserted in an inside air passage 5; and an electrical part 8 located outside of the housing 1. The opening/closing mechanism part 7 includes a motor 14 for rotationally driving a rotary shaft 15, and a damper 9 for changing a passing area of the inside air passage 5 by rotational driving of the rotary shaft 15, and it also includes a rib 11 which is slightly larger than an opening 6 on a horizontal cross sectional outer periphery of a frame 10 for constituting the opening/closing mechanism part 7. Thus, leakage of air conditioning (cooling) air from a gap in a penetration part is suppressed, and wet ceiling caused by dew condensation in a member occurring by cooling of the member outside of the air passage can be prevented.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an air volume adjusting damper connected to an air conditioning duct or the like and used for air volume adjustment.

  Conventionally, this type of air volume adjustment damper is configured as a part of a duct system passing through a narrow space such as a ceiling or between floors. A circular damper is provided in a cylindrical casing with both ends open, and the damper is driven to rotate by a motor or the like. The damper is fixed to the rotating shaft and supported by a bearing member so that the rotating shaft can be driven to rotate. The damper is connected to the rotating shaft and a drive shaft such as a motor outside the housing, and a heat insulating material is attached to the outside of the housing. Is known.

  Hereinafter, the air volume adjusting damper will be described with reference to FIG.

  As shown in FIG. 6, the air volume adjusting damper includes a housing 102 having an air passage inside, a damper 101 incorporated in the air passage, a bearing member that holds a damper rotating shaft, and a motor attached to the outside of the housing. 103 and a motor fixing member 104. The damper 101 is screwed together with the damper rotation shaft. A motor rotation shaft is connected to the damper rotation shaft, and the damper 101 is opened and closed when the motor 103 is driven to rotate. Further, when the heat insulating material 105 attached to the housing 102 is connected to the air conditioning (cooling) duct system, condensation on the outer surface can be suppressed.

Japanese Patent Laid-Open No. 5-118636

  In such an air volume adjusting damper, in order to connect the damper rotating shaft and the motor rotating shaft, a through hole through which the damper rotating shaft passes is necessary outside the housing. In order to smoothly operate the damper rotating shaft, an appropriate gap (clearance) is required between the through hole and the damper rotating shaft. For this reason, air-conditioning (cooling) air leaks from the gap due to the air flow pressure generated by adjusting the air volume, the motor and the motor fixing member are cooled, and condensation occurs, resulting in wet ceilings and the like. It had the problem that.

  Therefore, the present invention solves such a conventional problem, and in the air volume adjustment damper connected to the air conditioning duct, by suppressing the air leakage from the through hole, it is possible to cool the members outside the air passage. An object of the present invention is to provide an air volume adjusting damper capable of preventing condensation.

  In order to achieve the above object, an air volume adjusting damper according to the present invention includes a housing having an air passage inside and a damper structure that varies a cross-sectional area of the air passage in the housing. An opening / closing mechanism portion inserted into the road, and a non-insertion portion located outside the housing, wherein the opening / closing mechanism portion includes a damper that changes the air passage cross-sectional area by rotation of a rotation shaft, The non-insertion portion has a rotation mechanism that rotates the rotation shaft, the housing has an opening into which the opening / closing mechanism portion can be inserted from the outside of the housing, and the opening / closing mechanism has a housing. It is a wall surface constituting an opening of the body, and is provided with an air leakage prevention wall corresponding to the space between the outer wall and the inner wall, thereby achieving the intended purpose.

  ADVANTAGE OF THE INVENTION According to this invention, the leakage of the air-conditioned air from the opening of a housing | casing, ie, the part which penetrates an air path and the exterior, is suppressed, and an energy loss can be suppressed. Further, during cooling, it is possible to provide an air volume adjusting damper that can prevent the cooled air from leaking to the outside and prevent the dew condensation of the member that occurs due to the cooling of the member outside the air passage.

The perspective view which shows the structure of the air volume adjustment damper of Embodiment 1 of this invention. Exploded view of the same air volume adjustment damper Vertical sectional view showing the structure of the same air volume adjustment damper Horizontal sectional view showing the structure of the same air volume adjustment damper Enlarged view of the damper mechanism of the same air volume adjustment damper Front view showing the configuration of a conventional air volume adjustment damper

  An air volume adjusting damper according to the present invention is an air volume adjusting damper including a casing having an air path therein and a damper structure that varies an air path cross-sectional area in the casing. An opening / closing mechanism portion to be inserted into the air passage, and a non-insertion portion located outside the housing, wherein the non-insertion portion includes a rotation mechanism for rotating a rotation shaft, and the housing includes the The opening / closing mechanism is provided with an opening through which the housing can be inserted from the outside to the inside, and the opening / closing mechanism is located in the opening of the housing between the outer wall surface and the inner wall surface of the housing. The air leakage prevention wall is provided.

  As a result, the airtightness inside and outside the air passage can be increased, so that leakage of air-conditioning (cooling) air from the gap of the through portion caused by the pressure inside the air passage is prevented, and members outside the air passage are not cooled, Condensation of members can be prevented. There is an effect.

  Further, a plurality of the air leakage prevention walls may be provided in the thickness direction of the casing.

  Thereby, since the airtightness inside and outside the air passage can be further increased, leakage of the air-conditioning (cooling) air from the clearance of the through portion caused by the pressure inside the air passage is prevented, and members outside the air passage are not cooled. It can prevent the ceiling from getting wet due to the condensation of members. There is an effect.

  The casing may include a fixture that removably fixes the damper structure to the casing in a state where the opening / closing mechanism is inserted into the opening.

  Thereby, even if the air volume adjustment damper is in a ducted state, the damper structure can be freely removed by removing the fixture, so that the maintainability is improved. There is an effect.

  Moreover, you may comprise the said housing | casing with the polystyrene foam.

  Thereby, the air volume adjustment damper with a high heat insulation effect can be provided.

  The outer periphery of the air leakage prevention wall and the opening may be rectangular, and the short side of the opening may be smaller than the short side of the air leakage prevention wall.

  As a result, the long side of the air leakage prevention wall is in close contact with the wall surface constituting the long side of the opening, so that airtightness inside and outside the air passage is enhanced, and air-conditioning (cooling) air from the gap in the opening is increased. Leakage is prevented. And since the member outside an air path is not cooled, dew condensation of a member can be prevented. There is an effect.

  The long side of the opening may be configured to be smaller than the long side of the air leakage prevention wall.

  Thereby, since the outer periphery of the air leakage prevention wall is in close contact with the inner wall surface constituting the opening, it is possible to enhance the airtightness inside and outside the air passage.

  Further, the opening / closing mechanism section includes a damper that changes the cross-sectional area of the air passage by rotation of the rotating shaft, a frame that forms an outline of the damper, and further protrudes from the outer periphery of the frame to the outer peripheral side, and enters the air passage. In the inserted state, the frame may have a personality including a frame fixing portion that is sandwiched from an upstream side and a downstream side in the flow of wind in the casing.

  Thereby, even if the pressure in the internal air passage rises, the casing can hold the opening / closing mechanism portion with a force larger than the air passage internal pressure. And since it can suppress that a damper rotating shaft inclines in an internal air path, and a damper can be opened and closed smoothly, stable air volume adjustment can be performed.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention. The following embodiments are examples embodying the present invention, and do not limit the technical scope of the present invention. In addition, throughout the drawings, the same portions are denoted by the same reference numerals, and the second and subsequent descriptions are omitted.

(Embodiment 1)
As shown in FIG. 1, the air volume adjusting damper according to the present embodiment includes a housing 1, a damper structure 2, a fixture 3, and adapters 4 at both ends of the housing 1 so that duct connection is possible. Yes. The housing 1 is a resin with good moldability, for example, molded from polystyrene foam, and has a hollow cylindrical shape and an internal air passage 5. The hollow cylindrical housing 1 is formed by connecting two semicylindrical members 1a having the same shape. Here, the semicylindrical shape refers to the shape of one member obtained by cutting the top surface and the bottom surface in half in a hollow and substantially columnar member.

  A rectangular opening 6 that communicates with the internal air passage 5 is provided at substantially the center of the housing 1. The opening 6 is configured to accommodate a frame 10 described later. The length of the long side of the opening 6 is the same as the diameter of the internal air passage 5 or longer than the diameter of the internal air passage 5. For example, a blower (not shown) is provided on the upstream side or the downstream side of the internal air passage 5, that is, a wind flow is generated from the upstream side to the downstream side of the internal air passage 5.

  Next, the configuration of the damper structure 2 will be described.

  As shown in FIGS. 2 and 3, the damper structure 2 includes an opening / closing mechanism portion 7 and an electrical component portion 8 serving as a non-insertion portion. The opening / closing mechanism 7 includes a damper 9 and a frame 10 that holds the damper 9.

  The electrical part 8 has a rectangular box shape, and a motor 14 serving as a rotation mechanism for opening and closing the damper 9 is disposed therein. A through hole 12 through which the relay shaft 13 is passed is provided in the outer shell (box) of the electrical component 8. The rotation shaft 15 of the motor 14 is connected to the damper 9 via the relay shaft 13, and the rotational drive of the motor 14 is transmitted to the damper 9 via the relay shaft 13, so that the damper 9 rotates and the internal air passage 5 is connected. It is configured to open and close.

  The through hole 12 is provided through the casing 1 from the lower surface of the outer shell of the electrical component 8 to the upper end of the damper 9. The through-hole 12 has a T shape in a cross-sectional view, and includes a head portion 40a on the electrical component 8 side and a body portion 41a on the damper 9 side.

  The head portion 40a has a thin cylindrical shape, and has a larger diameter than the body portion 41a.

  The body part 41a is formed by matching the head 40a with the center of the circle. The body part 41a is thicker than the head part 40a, and the diameter of the circle is smaller than that of the head part 40a. That is, the body part 41a has a shape that is longer than that of the head part 40a.

  The relay shaft 13 has a length connecting the lower surface of the electrical component 8 to the upper end of the damper 9. The relay shaft 13 has a cylindrical shape. The relay shaft 13 has a T-shape in a cross-sectional view, and includes a shaft head portion 40b on the electrical component 8 side and a shaft body portion 41b on the damper 9 side.

  The shaft head 40b is cylindrical and has a larger diameter than the shaft body 41b and the body 41a.

  The shaft body portion 41b is formed so that the shaft head 40b and the center of the circle coincide with each other. The shaft body portion 41b is thicker than the shaft head portion 40b and has a smaller diameter than the shaft head portion 40b. That is, the shaft body portion 41b has a shape that is longer than that of the shaft head portion 40b. One end (lower end) of the shaft head 40b on the damper 9 side has a prismatic shape, and is connected to a damper 9 described later.

  When the relay shaft 13 is inserted into the through hole 12, the diameter of the shaft head portion 40b in the relay shaft 13 is larger than the diameter of the body portion 41a in the through hole 12, so that the shaft head portion 40b is located above the body portion 41a. You will put a lid. In order to pivotally insert the relay shaft 13 into the through hole 12, a clearance is provided between the inner wall of the body portion 41a and the outer peripheral surface of the shaft body portion 41b. However, there is a gap through which air passes. On the other hand, since the axial head part 40b covers the upper part of the trunk | drum 41a by the said shape, the internal air path 5 and the electrical equipment part 8 can be spatially independent.

  The damper 9 is circular, and the center line passing through the center of the circle in the vertical direction in FIG. One end of the damper rotating shaft 21 is located on the outer periphery of the damper 9 and has a cylindrical shape. That is, one end (downward) of the damper rotation shaft 21 has a rectangular recess 22 that is recessed toward the center of the damper 9. The other end (upper side) of the damper rotating shaft 21 is provided with a rectangular recess 24 that is recessed toward the center of the damper 9.

  The frame 10 is located further on the outer periphery of the outer edge of the damper 9, surrounds the damper 9, and has a U-shaped outer shape. That is, the frame 10 is formed in a U shape with an arc-shaped frame on the opposite side of the electrical component 8 and two parallel frames on the electrical component 8 side. The frame 10 is inserted into the opening 6 provided in the housing 1 and attached. The inner peripheral side of the frame 10 is composed of the damper 9 and the closed portion between the parallel frames described above. The closing portion is a plate-like portion that closes a portion other than the circular opening for the damper 9 on the inner peripheral side of the frame 10.

  The frame 10 attached to the housing 1 is the outer periphery thereof, and the outer peripheral portion of the arc-shaped frame is in contact with the inner wall surface of the internal air passage 5, and two parallel parallelly positioned above the arc-shaped frame. The frame and the closed portion are disposed so as to be sandwiched between the upstream side and the downstream side of the housing 1. Further, the frame 10 is provided with outer peripheral ribs 16 as frame fixing portions over the entire periphery along the outer periphery.

  The outer peripheral rib 16 is a rib protruding further outward from the outer periphery of the frame 10 and has a U shape.

  A cylindrical convex portion 23 is provided on the inner peripheral side of the frame 10 at a position facing one end of the damper rotating shaft 21 (an end portion having the concave portion 22). The convex portion 23 may be cylindrical. The convex portion 23 provided in the frame 10 is fitted (gap fit) into the concave portion 22 provided at one end of the damper rotating shaft 21.

  As described above, the rectangular recess 24 is provided on the other end side of the damper rotating shaft 21. One end of a prismatic shape of the relay shaft 13 is fitted in the recess 24. Further, as described above, the other end of the relay shaft 13 is engaged with the rotating shaft 15 of the motor 14. Thus, the convex part 23 provided in the flame | frame 10, the damper rotating shaft 21, the relay shaft 13, and the rotating shaft 15 are arrange | positioned on the same straight line. The damper 9 is opened and closed by the rotation drive of the motor 14.

  The opening 6 provided in the housing 1 has substantially the same shape as the horizontal cross section of the frame 10. The horizontal cross section of the frame 10 is a plane orthogonal to the two parallel frames constituting the frame 10 described above. As described above, the opening 6 is substantially rectangular and has a groove corresponding to the outer peripheral rib 16 of the frame 10 described above on the short side.

  A groove 26 into which the outer peripheral rib 16 provided on the frame 10 is fitted is formed in the internal air passage 5 of the housing 1. The frame 10 can be inserted into the housing 1 (inside the internal air passage 5) so as to slide from the opening 6. When the opening / closing mechanism 7 is inserted into the opening 6 and is operable, the outer peripheral rib 16 is sandwiched from the upstream side and the downstream side by the groove 26 formed in the housing 1. That is, the outer peripheral rib 16 provided on the outer periphery of the frame 10 is fitted into the groove 26 provided on the inner wall surface of the inner air passage 5, and the frame 10 is positioned in the inner air passage 5.

  Therefore, even when the pressure in the internal air passage 5 rises (when the damper 9 is closed), the housing 1 can hold the opening / closing mechanism portion 7 with a force larger than the air passage pressure. And since it can suppress that the damper rotating shaft 21 inclines in the internal air path 5, and the damper 9 can be opened and closed smoothly, stable air volume adjustment can be performed. A groove in which the frame 10 itself is fitted may be provided.

  As shown in FIG. 5, the frame 10 is provided with two ribs 11 serving as an air leakage prevention wall that have substantially the same outer peripheral shape as the inner peripheral shape of the opening 6. The rib 11 is provided on the electric component 8 side of the plate-like portion of the frame 10, that is, the damper 9. When the frame 10 is completely attached to the housing 1, the top of the rib 11 comes into contact with the inner wall surface that forms the opening 6. As shown in FIG. 3, the plurality of ribs 11 are arranged between the inner wall surface 30 and the outer wall surface 31 of the housing 1, that is, in the thickness direction of the housing 1. Thereby, the rib 11 and the housing | casing 1 closely_contact | adhere without a gap.

  The rib 11 is provided so as to be orthogonal to the insertion direction of the damper structure 2, that is, the two parallel frames constituting the frame 10 described above. The outer peripheral shape of the rib 11 is larger than the opening 6 so as to be in close contact with the inner wall surface of the opening 6 horizontally. The horizontal cross section of the frame 10 is a plane orthogonal to the two parallel frames constituting the frame 10 described above.

  The opening 6 is substantially rectangular, and the outer peripheral shape of the rib 11 is also substantially rectangular. The short side of the rib 11 is preferably larger than the short side of the opening 6. More preferably, the long side of the rib 11 is preferably larger than the long side of the opening 6.

  By adopting such a configuration, leakage of air-conditioning (cooling) air from the gaps in the penetrating portion that occurs when the pressure in the air passage increases (the state in which the air volume is adjusted by the damper 9) is suppressed. It is possible to prevent dew condensation of the member that occurs due to cooling of the member outside the road.

  Further, since the shaft head portion 40b in the relay shaft 13 covers the upper portion of the body portion 41a in the through hole 12, the internal air passage 5 and the electrical component portion 8 can be spatially independent, and the above-described dew condensation prevention can be achieved. The effect can be enhanced.

  Further, since the short side of the rib 11 is longer than the short side of the opening 6, the long side of the rib 11 can be brought into close contact with the inner wall surface of the opening 6, so that the sealing degree can be increased. Furthermore, by making the long side of the rib 11 longer than the long side of the opening 6, the degree to which the outer periphery of the rib 11 adheres to the inner wall surface of the opening 6 can be increased.

  Further, by making the casing 1 made of polystyrene foam, it becomes possible to push the rib 11 having an outer peripheral shape larger than the inner peripheral shape of the opening 6 into the opening 6, and the rib 11 and the inner wall surface of the opening 6. The degree of adhesion can be increased.

  A plurality of ribs 11 may be provided in the thickness direction of the housing 1.

  By adopting such a configuration, since many airtight portions are provided, air conditioning (cooling) from the gaps in the penetrating portion even when the pressure in the air passage is further increased (the damper 9 is nearly fully closed). Leakage of air is suppressed, and it is possible to prevent the ceiling from getting wet due to condensation of the members generated by cooling the members outside the air passage. Therefore, finer air volume adjustment can be performed.

  As shown in FIG. 2, a fixture 3 is used to fix the damper structure 2 to the housing 1. The fixture 3 is U-shaped, and is provided with a fixing portion 3a bent inward so that both ends face each other. The fixture 3 is disposed so as to grip the outer peripheral surface of the housing 1. The fixing portion 3a is fixed to a fixing base 25 provided so as to project outside the electrical component portion 8 with a screw.

  By adopting such a configuration, it is possible to suppress the damper structure 2 from being detached from the housing 1, so that the damper structure 2 can be stably held in the housing 1. In other words, the damper structure 2 can be freely removed by removing the screw from the fixture 3. Thereby, the damper 9 can be easily replaced while being connected to the duct, and the maintenance property can be improved.

  Further, since the casing 1 is configured by connecting two semicylindrical members 1a having the same shape, a part of the already laid duct is removed, and the duct is sandwiched by the semicylindrical members 1a from the left and right. By arranging in such a manner, it is possible to retrofit the damper function. At this time, the damper is disposed by fitting the opening / closing mechanism 7 into the openings 6 (exactly half openings) provided in the two semi-cylindrical members 1a, instead of sandwiching the air leakage prevention wall from both sides. . That is, the opening / closing mechanism 7 is fixed from the direction perpendicular to the direction of the force received by the damper due to the flow of wind. For this reason, the influence of the distortion and deviation which the flow of a wind gives to the housing | casing 1 via the opening / closing mechanism part 7 can be suppressed, and generation | occurrence | production and expansion of a clearance gap can be suppressed.

  The air volume adjusting damper according to the present invention is capable of preventing cooling of members outside the air passage by suppressing air leakage from the through-hole when adjusting the air volume, thereby preventing the ceiling from being wet due to condensation. It is useful as an air volume distribution device used in a system or the like.

DESCRIPTION OF SYMBOLS 1 Case 2 Damper structure 3 Fixing tool 3a Fixing part 4 Adapter 5 Internal air path 6 Opening 7 Opening / closing mechanism part 8 Electrical part 9 Damper 10 Frame 11 Rib 12 Through-hole 13 Relay shaft 14 Motor 15 Rotating shaft 16 Outer peripheral rib 21 Damper Rotating shaft 22 Concave portion 23 Convex portion 24 Concave portion 25 Fixing base 26 Groove 30 Inner wall surface 31 Outer wall surface 40a Head portion 40b Shaft head portion 41a Body portion 41b Shaft body portion

Claims (9)

An air volume adjusting damper comprising a housing having an air passage inside and a damper structure that varies an air passage cross-sectional area in the housing,
The damper structure includes an opening / closing mechanism part inserted into the air passage, and a non-insertion part located outside the housing,
The non-insertion part is
A rotation mechanism that rotates the rotating shaft
The housing is
Provided with an opening through which the opening / closing mechanism portion can be inserted from the outside of the housing.
The opening / closing mechanism is
An air volume adjusting damper including an air leakage prevention wall located between the outer wall surface and the inner wall surface of the housing within the opening of the housing. The air leakage prevention wall is
The air volume adjusting damper according to claim 1, wherein a plurality of air volume adjusting dampers are provided in a thickness direction of the housing. The housing is
The air volume adjusting damper according to claim 1, further comprising a fixing member that removably fixes the damper structure to the housing in a state where the opening / closing mechanism is inserted into the opening. The air volume adjusting damper according to any one of claims 1 to 3, wherein the casing is made of foamed polystyrene. The air volume adjusting damper according to claim 4, wherein an outer periphery of the air leakage prevention wall and the opening are rectangular, and a short side of the opening is smaller than a short side of the air leakage prevention wall. The air volume adjusting damper according to claim 5, wherein a long side of the opening is smaller than a long side of the air leakage prevention wall. The opening / closing mechanism is
A damper that changes the cross-sectional area of the air passage by rotation of the rotating shaft;
A frame forming an outline of the damper;
From the outer periphery of the said frame, the frame fixing | fixed part further protruded to the outer peripheral side, and is clamped from the upstream and downstream in the flow of the wind in the said housing | casing in the state inserted in the said air path. The air volume adjusting damper according to any one of 6. The damper structure is
A cylindrical relay shaft for transmitting the power of the rotating mechanism to the damper;
A cylindrical through hole through which the relay shaft passes,
The through hole is
A head on the rotating mechanism side;
A body portion on the damper side;
The rotation axis is
A shaft head on the rotating mechanism side;
A shaft body on the damper side,
The shaft head is
The air volume adjusting damper according to claim 7, wherein the air volume adjusting damper has a diameter larger than that of the body portion. The housing is
The air volume adjusting damper according to any one of claims 1 to 8, wherein the air volume adjusting damper is configured by connecting two semi-cylindrical members.