JP2015200475A - damper device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a damper device which can suppress the generation of a malfunction resulting from the freeze of dew condensation water even if employing a method for linearly moving a cover for switching an opening of a cold air passage by a feed screw mechanism.SOLUTION: In a damper device 1, a rotation output of a rotating drive part is transmitted to a cover 2 via a rotation linear movement conversion mechanism 7 having a feed screw mechanism 70, and an opening of a cold air passage is switched by linearly moving the cover 2 to a support body 6. At this time, even if water which is dew-condensed intrudes into a clearance between an external peripheral face 310 of a rotating body 3 and an internal peripheral face 200 of a rotating body arrangement hole 20 of the cover 2, the dew condensation water passes through a drain passage 8 utilizing a notch 28 which is formed at an opening edge of the rotating body arrangement hole 20, and flows out downwardly from the inside of the rotating body arrangement hole 20. By this constitution, it can be suppressed that the dew condensation water is frozen between the internal peripheral face 200 of the rotating body arrangement hole 20 and the rotating body 3.

Description

  The present invention relates to a damper device provided in a cold air passage.

  As a damper device for switching the amount of cold air supplied to the refrigerator, a damper device of a type that switches the opening of the cold air passage by rotating around the end of a plate-like baffle has been proposed (Patent Document 1). reference). There has also been proposed a damper device in which a cool air discharge port is covered with a cap having an opening and the opening of the cool air passage is switched depending on the angular position of the cap (see Patent Document 2).

JP 2007-155146 A JP 11-118317 A

  While the method described in Patent Document 1 requires a large space for opening and closing the baffle, the method described in Patent Document 2 is unsuitable for greatly opening the cold air passage. Therefore, the inventor of the present application arranges the rotating body in the rotating body arranging hole of the cover and linearly moves the cover by the feed screw mechanism configured between the inner peripheral surface of the rotating body arranging hole and the outer peripheral surface of the rotating body. We are studying a method for switching the opening of the cold air passage. According to such a method, there is an advantage that a large space is not required for the movement of the cover and the cold air passage can be greatly opened.

  However, in the case of a damper device arranged in the cold air passage, the condensed water may freeze between the inner peripheral surface of the rotating body arrangement hole provided in the cover and the rotating body. In such a case, the cover and the rotating body And the feed screw mechanism cannot be operated.

  In view of the above problems, the problem of the present invention is to suppress the occurrence of malfunction due to icing of condensed water even when a system that directly moves the cover for switching the opening of the cold air passage by a feed screw mechanism is adopted. It is an object of the present invention to provide a damper device that can do this.

  In order to solve the above-described problems, a damper device according to the present invention includes a support, a rotation drive unit supported by the support, a rotation body that is rotationally driven by the rotation drive unit, and the rotation body inside. A cover for switching the opening of the cold air passage, and a feed screw mechanism configured between the outer peripheral surface of the rotary member and the inner peripheral surface of the rotary member arrangement hole. A rotation / linear motion conversion mechanism for converting the rotational motion of the rotating body into a linear motion motion of the cover in the direction of the central axis of the cover; and water condensed when the support is installed in the cold air passage. And a drainage path for flowing downward from the inside of the rotating body arrangement hole.

In the present invention, the rotation output of the rotation drive unit is transmitted to the cover via a rotation / linear motion conversion mechanism having a feed screw mechanism, the cover is linearly moved with respect to the support, and the opening of the cold air passage is formed by the cover. Switch. At this time, even if condensed water enters between the outer peripheral surface of the rotating body and the inner peripheral surface of the rotating body arrangement hole, the dew condensation water flows out from the inside of the rotating body arrangement hole through the drainage path. For this reason, since it is possible to prevent the condensed water from icing between the inner peripheral surface of the rotator arrangement hole and the rotator, it is possible to suppress adhesion between the cover and the rotator due to icing. Therefore, even when a system in which the cover for switching the opening of the cold air passage is moved directly by the feed screw mechanism, it is possible to suppress the occurrence of malfunction due to icing of condensed water.

  In the present invention, a notch extending radially outward is formed in a part in the circumferential direction of the opening edge of the rotating body arranging hole, and the drainage path is an inner circumferential surface of the rotating body arranging hole. And the notch. According to such a configuration, the drainage path can be configured by a design change to the cover.

  In the present invention, the inner surface of the notch preferably has a tapered surface inclined with respect to the central axis. According to such a configuration, the dew condensation water is likely to flow out through the notch.

  In this invention, it is preferable that the said notch is formed from the edge of the one side of the said central axis direction of the said rotary body arrangement | positioning hole to the edge of the other side. According to such a configuration, the condensed water is easily received by being cut out.

  In this invention, it is preferable that the said notch is formed in circular arc shape seeing from the said central axis direction. According to such a configuration, since the range in which the notch is formed is wide, the condensed water is easily received by the notch and flows out.

  In the present invention, the support includes a seal plate that overlaps the outer peripheral surface of the rotating body and the inner peripheral surface of the rotating body disposition hole when viewed from the central axis direction at a position adjacent to the rotating body in the central axis direction. It is preferable. According to such a configuration, even when a notch is provided in the rotating body arrangement hole, it is possible to suppress the leakage of cold air through the notch.

  In this invention, when the said cover moves to the said seal board side in the said center axis direction, it is preferable to contact the said seal board. According to such a configuration, even when a notch is provided in the rotating body arrangement hole, it is possible to suppress the leakage of cold air through the notch.

  In the present invention, the cover is preferably provided with a film heater. According to this configuration, it is possible to suppress icing of condensed water.

  In the present invention, the feed screw mechanism includes a protrusion extending spirally on the outer peripheral surface of the rotating body, and a spiral extending on the inner peripheral surface of the rotating body disposing hole. The structure which has the groove | channel fitted inside can be employ | adopted.

  In the present invention, a structure in which a fan unit is connected to the support may be employed.

  According to the present invention, even if condensed water enters between the outer peripheral surface of the rotating body constituting the feed screw mechanism and the inner peripheral surface of the rotating body arranging hole, the water passes through the drain path and the rotating body. It flows downward from the placement hole. For this reason, since it is possible to prevent the condensed water from icing between the inner peripheral surface of the rotator arrangement hole and the rotator, it is possible to suppress adhesion between the cover and the rotator due to icing. Therefore, even when a system in which the cover for switching the opening of the cold air passage is moved directly by the feed screw mechanism, it is possible to suppress the occurrence of malfunction due to icing of condensed water.

It is a perspective view of the damper device concerning Embodiment 1 of the present invention. 1 is an exploded perspective view of a damper device according to Embodiment 1 of the present invention. It is explanatory drawing of the rotational drive part etc. of the damper apparatus which concerns on Embodiment 1 of this invention. It is explanatory drawing, such as a cover of the damper apparatus which concerns on Embodiment 1 of this invention. It is explanatory drawing, such as a stopper of the damper apparatus which concerns on Embodiment 1 of this invention. It is explanatory drawing of the ice escape part of the damper apparatus which concerns on Embodiment 2 of this invention. It is explanatory drawing of the ice escape part of the damper apparatus which concerns on Embodiment 3 of this invention.

  Embodiments of a damper device to which the present invention is applied will be described below with reference to the drawings. In the following description, in the direction in which the central axis L of the rotating body 3 extends (in the direction of the central axis L), the side where the cover 2 opens the cold air passage 100 is referred to as one side L1, and the cover 2 is the cold air passage. The side in which 100 is closed will be described as the other side L2.

[Embodiment 1]
(overall structure)
FIG. 1 is a perspective view of a damper device 1 according to Embodiment 1 of the present invention. FIG. 1 (a) is a perspective view of a cover 2 in a closed position, and FIG. 1 (b) is a cover 2 in an open position. FIG. 2 is an exploded perspective view of the damper device 1 according to the first embodiment of the present invention. FIG. 2 (a) is an exploded perspective view of the state in which the cover 2 is removed from the support body 6, and FIG. FIG. 2C is an exploded perspective view in a state where the fan unit 101 is removed from the support body 6, and FIG. 2C is an exploded perspective view in a state where the cover 2 and the fan unit 101 are removed from the support body 6. FIG. 3 is an explanatory diagram of the rotational drive unit 5 and the like of the damper device 1 according to the first embodiment of the present invention, and FIG. 3A is an exploded perspective view of the state where the rotary body 3 is removed from the rotational drive unit 5. FIG. 3B is an exploded perspective view of the rotation drive unit 5.

  As shown in FIGS. 1 and 2, the damper device 1 according to the present embodiment is a device that switches the opening degree of a cold air passage at one end of a cold air passage 100 (shown by a two-dot chain line) such as a duct through which cold air such as cooling air flows. is there. The damper device 1 includes a support body 6 that supports a rotation drive unit 5 and the like that rotate the rotation body 3 around its central axis L. Further, the damper device 1 has a cover 2 provided with a rotating body arrangement hole 20 in which the rotating body 3 is arranged inside, and a feed is provided between the rotating body 3 and the rotating body arrangement hole 20 of the cover 2. A screw mechanism 70 is configured. The configurations of the rotator 3, the rotation drive unit 5, the cover 2, and the feed screw mechanism 70 will be described later.

(Configuration of fan unit 101)
In the damper device 1 of this embodiment, the fan unit 101 is integrally attached to the support 6. The fan unit 101 includes a frame body 102 attached to an end portion of the cold air passage 100, an axial flow blade 103 rotatably supported by the frame body 102, and a fan motor unit 107 that rotates the axial flow blade 103. Yes. The fan motor unit 107 includes a cylindrical motor case 108 and a fan motor (not shown) housed therein. A circular opening 104 is formed in the frame body 102, and the opening 104 communicates with the inside of the cold air passage 100. The frame body 102 includes an outer frame 105 in which a circular opening 104 is formed, and four support frames 106 that extend radially from the outer frame 105 toward the center of the opening 104. The fan motor unit 107 is supported at a position overlapping the center of 104 in the direction of the central axis L. Each support frame 106 includes a vertical frame 106a extending from the outer frame 105 toward one side L1 of the central axis L, and a horizontal frame 106b extending radially inward from the tip end of the vertical frame 106a. The horizontal frame 106 b is connected to the outer peripheral surface of the fan motor unit 107. An axial flow blade 103 is rotatably attached to an end of the fan motor unit 107 on the other side L2 side in the central axis L direction. The axial flow blade 103 is a fan motor housed in the fan motor unit 107. Rotate around the central axis L based on the output rotation.

(Configuration of the support 6)
As shown in FIGS. 2 and 3, the support 6 has an outer frame 61 having a shape overlapping with the outer frame 105 of the frame 102 in the direction of the central axis L, and extends from the outer frame 61 to one side L1 of the central axis L. And four support frames 62 that are bent inward in the radial direction.

  Further, the support 6 has an annular seal plate 63 that connects the tips of the four support frames 62, and a cylindrical motor holding portion 64 that is formed at the center of the seal plate 63. The support 6 includes two guide shafts 65 extending from the diagonal position of the outer frame 61 toward the one side L1 of the central axis L, and a reinforcing frame 66 that connects the guide shaft 65 and the seal plate 63. have. A circular opening 69 is formed at the center of the outer frame 61, and the motor holding portion 64 is located at a position overlapping the center of the opening 69 in the central axis L direction.

  When the fan unit 101 is overlaid on the other side L2 of the central axis L of the support body 6 thus configured, the support frame 106 overlaps the other side L2 of the central axis L of the support frame 62, and the outer frame 61, the frame body 102, And the opening 69 and the opening 104 overlap. In this state, if the outer frame 61 and the frame body 102 are connected by screws (not shown), the support body 6 and the fan unit 101 are integrated. Accordingly, the opening 69 communicates with the inside of the cool air passage 100 through the opening 104 of the fan motor unit 107.

(Configuration of the rotation drive unit 5)
As shown in FIG. 3, the rotation driving unit 5 includes a motor 59 held inside the motor holding unit 64 of the support 6 and a reduction gear train 50. The motor holding portion 64 holds a disc-shaped support plate 67 on one side L1 of the central axis L with respect to the motor 59, and has a support so that the support plate 67 is covered by one side L1 of the central axis L. A bottom cylindrical holder 68 is covered, and the holder 68 is fixed to the motor holding portion 64 with screws 680. A gear used for the reduction gear train 50 is rotatably supported between the support plate 67 and the holder 68 thus configured.

  In this embodiment, the reduction wheel train 50 has a first wheel 51 provided with a large-diameter gear portion 511 that meshes with a pinion (not shown) of a motor 59 and a large diameter meshed with a small-diameter gear portion 512 of the first wheel 51. The second wheel 52 provided with the gear portion 521, the third wheel 53 provided with the large diameter gear portion 531 engaged with the small diameter gear portion 522 of the second wheel 52, and the small diameter gear portion 532 of the third wheel 53. And a fourth wheel & pinion 54 provided with a large-diameter gear portion 541.

  The fourth wheel & pinion 54 is formed with a cylindrical portion 542 protruding toward one side L1 of the central axis L, and the outer peripheral surface of the cylindrical portion 542 protrudes along the central axis L at a plurality of locations in the circumferential direction. A serration 543 extending from the portion is formed. A hole 682 is formed in the center of the bottom plate portion 681 of the holder 68, and the cylindrical portion 542 of the fourth wheel & pinion 54 projects from the hole 682 toward the one side L 1 of the central axis L.

(Schematic configuration of the rotating body 3)
As shown in FIGS. 1, 2, and 3, the rotating body 3 includes a cylindrical body portion 31 and a bottom plate portion 32 that closes the opening of the body portion 31 on one side L <b> 1 of the central axis L. . The body portion 31 protrudes from the bottom plate portion 32 to one side L1 of the central axis L. For this reason, in the rotating body 3, a rotating body-side protrusion 311 that protrudes to one side L <b> 1 of the central axis L extends in an annular shape along the outer peripheral edge of the bottom plate portion 32.

A cylindrical portion 33 is formed at the center of the bottom plate portion 32. On the inner peripheral surface of the cylindrical portion 33, serrations 330 having convex portions extending along the central axis L are formed at a plurality of locations in the circumferential direction. Yes. Therefore, when covering the rotating body 3 so as to cover the holder 68 and the motor holding portion 64 from the one side L1 of the central axis L, the cylindrical portion 542 of the fourth wheel & pinion 54 is inserted inside the cylindrical portion 33, and the serrations 543, 330 are inserted. After the two are coupled, if the screw 56 with a washer is fastened from the one side L1 of the central axis L to the inside of the cylindrical portion 542, the rotating body 3 can be rotated integrally with the fourth wheel & pinion 54.

(Schematic configuration of cover 2)
FIG. 4 is an explanatory diagram of the cover 2 and the like of the damper device 1 according to Embodiment 1 of the present invention, and FIG. 4A is a front view of the damper device 1 as viewed from one side L1 of the central axis L. 4B is a cross-sectional view of the damper device 1 taken along the line Y1-Y1 ′, FIG. 4C is a front view of the cover 2 viewed from one side L1 of the central axis L, and FIG. d) is a cross-sectional view of the center portion of the cover 2 cut along the line Y2-Y2 '. In FIG. 4B, only the fourth wheel 54 is illustrated in the rotation driving unit 5.

  As shown in FIGS. 1, 2, 3, and 4, the cover 2 includes an end plate portion 21, and a side plate portion 22 that extends from the outer periphery of the end plate portion 21 to the other side L <b> 2 in the central axis L direction. It has. Of the four corners of the square, the end plate portion 21 has a shape in which three portions are chamfered in an arc shape and one portion is chamfered linearly. The center of the end plate portion 21 is a cylindrical portion 23 that protrudes from the end plate portion 21 to the one side L1 and the other side L2 in the central axis L direction. For this reason, an annular cover-side ridge portion 231 formed of an end portion of the cylindrical portion 23 is formed on one surface L1 of the end plate portion 21 in the direction of the central axis L, and the central axis L of the end plate portion 21 is formed. An annular ridge portion 232 formed of the end portion of the cylindrical portion 23 is also formed on the surface on the other side L2 in the direction. Further, a guide hole 210 in which the guide shaft 65 of the support 6 is fitted is formed in the end plate portion 21 of the cover 2.

(Configuration of feed screw mechanism 70)
The inside of the cylindrical portion 23 is a rotating body arrangement hole 20 in which the rotating body 3 is arranged on the inside. A feed screw mechanism 70 is formed between the outer peripheral surface 310 of the rotator 3 and the inner peripheral surface 200 of the rotator arrangement hole 20, and the feed screw mechanism 70 is an empty space composed of a guide shaft 65 and a guide hole 210. A rotation / linear motion conversion mechanism 7 that converts the rotation operation of the rotating body 3 into a linear motion operation in the direction of the central axis L of the cover 2 is configured together with the rotation prevention unit.

  In this embodiment, the feed screw mechanism 70 spirally extends on the protrusion 37 that spirally extends on the outer peripheral surface 310 of the rotating body 3 and on the inner peripheral surface 200 of the rotating body arrangement hole 20 of the cover 2. The ridge portion 37 is formed in the groove 27 and is fitted inside the groove 27. In this embodiment, when the groove 27 is formed, a part of the inner circumferential surface 200 of the rotating body arrangement hole 20 in the circumferential direction is a thick part 26 projecting radially inward, and the groove 27 is formed in the thick part 26. It has a structured. Here, the thick part 26 (groove 27) is formed in two places in the circumferential direction. Further, the thick portion 26 is formed from the opening edge on one side L1 to the opening edge on the other side L2 in the central axis L direction of the rotating body arrangement hole 20.

  In the cover 2 configured as described above, the thick portion 26 is positioned on both sides in the horizontal direction X (left-right direction) in a state where the damper device 1 and the support 6 are installed in the cold air passage 100.

(Configuration of stopper 4)
FIG. 5 is an explanatory diagram of the stopper and the like of the damper device 1 according to the first embodiment of the present invention. FIG. 5A is a perspective view of the stopper as viewed from one side L1 of the central axis L. FIG. b) is an explanatory view of an ice escape portion provided in the stopper.

As shown in FIG. 5A, in the damper device 1 of the present embodiment, the cover that protrudes radially inward from the inner peripheral surface 200 of the rotating body arrangement hole 20 at the end portion on one side L1 of the center axis L of the cover 2. The side convex portion 29 protrudes radially outward at the end of one side L1 of the central axis L of the rotating body 3 and faces counterclockwise CCW around the central axis L with respect to the cover side convex portion 29 (the central axis L The stopper 4 is constituted by the rotating body-side convex portion 39 that can come into contact with the surrounding one side. The stopper 4 prevents the rotation of the rotating body 3 further by contacting the cover-side protruding portion 29 with the rotating body-side protruding portion 39, and the movable range of the center axis L of the cover 2 to the one side L 1. Is specified. In this embodiment, the stopper 4 is configured at two locations in the circumferential direction.

  In this embodiment, the cover-side convex portion 29 is composed of an end portion on the counterclockwise CCW side (one side around the central axis L) around the central axis L of the thick portion 26 provided to form the groove 27, It consists of the part which protruded from the cover side protrusion part 231 to radial inside. Moreover, the rotating body side convex part 39 consists of the part protruded from the rotating body side protrusion 311 to the radial direction outer side.

(Changing operation of opening degree of cold air passage 100)
In the damper device 1 of this embodiment, as shown in FIG. 1A, the cover 2 is on the other side L <b> 2 in the direction of the central axis L, and the side plate portion 22 of the cover 2 is in contact with the outer frame 61 of the support 6. The cold air passage is in a closed state. For this reason, the cold air supplied from the cold air passage 100 is blocked.

  In this state, when the motor 59 of the rotation driving unit 5 is operated and the rotating body 3 rotates clockwise CW, the rotation operation is applied to the cover 2 via the rotation / linear motion conversion mechanism 7 including the feed screw mechanism 70. As shown in FIG. 1B, the cover 2 moves to one side L1 in the direction of the central axis L. As a result, the side plate portion 22 of the cover 2 is separated from the outer frame 61 of the support 6, so that the cool air passage 100 is opened. For this reason, the cold air supplied from the cold air passage 100 is supplied into the refrigerator compartment via the damper device 1 as indicated by an arrow C in FIG. At this time, the movable range of the center axis L of the cover 2 toward the one side L1 is defined by the rotating body side convex portion 39 coming into contact with the cover side convex portion 29 in the stopper 4 shown in FIG.

  When the motor 59 of the rotation drive unit 5 rotates in the reverse direction and the rotating body 3 rotates counterclockwise CCW, the rotation operation is covered via the rotation / linear motion conversion mechanism 7 including the feed screw mechanism 70. 1, the cover 2 moves to the other side L2 in the direction of the central axis L as shown in FIG. As a result, the side plate portion 22 of the cover 2 comes into contact with the outer frame 61 of the support 6, so that the cool air passage 100 returns to the closed state.

(Configuration of drainage path 8)
As shown by an arrow H in FIG. 4C, in the damper device 1 of this embodiment, the water condensed on the outer peripheral surface 310 or the like of the rotating body 3 is rotated when the damper device 1 and the support 6 are installed in the cold air passage. A drainage path 8 is configured to flow downward from the body arrangement hole 20.

  More specifically, in a state where the damper device 1 and the support 6 are installed in the cold air passage 100, a portion of the opening edge of the rotating body arrangement hole 20 positioned on the lower side is a cut that extends radially outward. A notch 28 is formed. In the present embodiment, the thickened portion 26 for forming the groove 27 of the feed screw mechanism 70 is provided at two locations on the opposite side in the circumferential direction, so that the damper device 1 and the support 6 are installed in the cold air passage 100. The two thick portions 26 are positioned in the horizontal direction, and the thick portion 26 is not positioned on the lower side. In this embodiment, the cutout 28 is provided on the lower side of the opening edge of the rotating body arrangement hole 20 by utilizing such a configuration. For this reason, the water condensed on the outer peripheral surface 310 of the rotating body 3 is caused by the spiral protrusions 37 formed on the outer peripheral surface 310 of the rotating body 3, the grooves 27 of the rotating body arranging holes 20, and the rotating body arranging holes 20. It is guided to the notch 28 through each part such as the inner peripheral surface 200 and discharged. As described above, the drainage path 8 includes the inner peripheral surface 200 of the rotating body arrangement hole 20 and the notch 28.

  Here, the notch 28 is circular in the entire region sandwiched in the circumferential direction by the groove 27 and the thick portion 26 constituting the feed screw mechanism 70 on the inner peripheral surface 200 side of the rotating body arrangement hole 20 when viewed from the central axis L direction. It is formed in an arc shape and the formation range in the circumferential direction is long.

  Further, the notch 28 is formed from the edge on one side L1 to the edge on the other side L2 in the central axis L direction of the rotating body arrangement hole 20. In addition, the inner surface of the notch 28 has a tapered surface 280 inclined toward the one side L1 with respect to the central axis L.

  In the present embodiment, the damper device 1 and the support body 6 are installed in the cold air passage, and the upper edge of the opening edge of the rotating body arrangement hole 20 is also similar to the notch 28 on the lower side. Even when the damper device 1 and the support body 6 are turned upside down and installed in the cold air passage, the water condensed on the outer peripheral surface 310 of the rotating body 3 or the like is lowered from the inside of the rotating body arrangement hole 20. The drainage path 8 is configured to flow out into the water. For this reason, on the opening edge side of the rotator arrangement hole 20, the thick portion 26, the notch 28, the thick portion 26 and the notch 28 are formed so as to be adjacent to each other in the circumferential direction. Each edge in the circumferential direction is used as either a region where the groove 27 for the feed screw mechanism 70 is formed or a notch 28 for the water drainage path 8. In this embodiment, the grooves 27 are formed at two locations over an angular range of about 90 ° per location in the circumferential direction, and the notches 28 are also formed at two locations over an angular range of about 90 ° per location in the circumferential direction. The thick portion 26 is divided into two portions 260 in the circumferential direction by the groove 27, and the angular range per part of the notch 28 is a portion where the groove 27 is sandwiched on both sides in the circumferential direction in the thick portion 26. 260 (see FIG. 4D) is wider than the angular range per location.

  When configured in this manner, a large gap due to the notch 28 is generated between the outer peripheral surface 310 of the rotating body 3 and the inner peripheral surface 200 of the rotating body arrangement hole 20 of the cover 2. However, the support 6 has an outer peripheral surface 310 of the rotating body 3 and an inner peripheral surface 200 of the rotating body arrangement hole 20 as viewed from the direction of the central axis L at a position adjacent to the rotating body 3 and the other side L2 in the central axis L direction. A sealing plate 63 is provided to overlap the gap. For this reason, the space between the outer peripheral surface 310 of the rotating body 3 and the inner peripheral surface 200 of the rotating body arrangement hole 20 of the cover 2 is covered with the seal plate 63. The cover 2 has an annular ridge portion 232 that protrudes toward the other side L2 in the central axis L direction, and the cover 2 is positioned on the other side L2 in the central axis L direction (the seal plate 63 is positioned). When moving to the side), the protrusion 232 comes into contact with the seal plate 63 over the entire circumference. Therefore, it is difficult for cold air to leak from the notch 28.

(Configuration of ice escape section 9)
As described with reference to FIG. 5A, in this embodiment, the stopper 4 is configured by the cover-side convex portion 29 of the cover 2 and the rotating-body-side convex portion 39 of the rotating body 3. For this reason, when the cover-side convex portion 29 and the rotating body-side convex portion 39 approach each other, ice generated by freezing of water condensed on the outer peripheral surface of the rotating body 3 is carried by the groove 27 and the ridge portion 37. As shown in FIG. 5B, the ice P is sandwiched between the cover-side convex portion 29 and the rotating body-side convex portion 39.

  Therefore, in this embodiment, in the cover 2, the cover side convex portion 29 is provided on the radially outer side with respect to the end 290 on the counterclockwise CCW side (one side around the central axis L) around the central axis of the cover side convex portion 29. When the rotor-side convex portion 39 approaches, as indicated by an arrow Wa, an ice escape portion 9 (cover-side ice escape portion) that releases ice P radially outward from between the cover-side convex portion 29 and the rotor-side convex portion 39. Part 9a) is constructed.

In this embodiment, the cover 2 is formed with a cover-side ridge portion 231 that extends along the opening edge of the rotating body arrangement hole 20 on the tip side (one side L1) in the central axis L direction. The protrusion 29 protrudes radially inward from the cover-side protrusion 231. Therefore, in this embodiment, a notch is formed in the cover-side protrusion 231, and the cover-side ice escape port 299 of the cover-side ice escape portion 9 a is configured by the notch. In the cover-side ice escape opening 299, the surface 299b located on the clockwise CW side (the other side around the central axis L) around the central axis out of the surfaces 299a and 299b facing in the circumferential direction is radially outward. The portion located is an inclined surface inclined in a direction away from the surface 299a. For this reason, the cover-side ice escape port 299 has a larger size in the circumferential direction on the radially outer side than on the radially inner side.

  Further, the end 290 of the cover side convex portion 29 on the counterclockwise CCW side (one side L1) has a diameter larger than that of the cover side contact portion 292 that can contact the rotating body side convex portion 39 and the cover side contact portion 292. And a cover-side inclined surface 293 that faces the radially outer side, and the cover-side inclined surface 293 forms an inclined surface 295 that is continuous with the clockwise CW-side surface 299b of the cover-side ice escape port 299. Yes. For this reason, the radial dimension of the cover side contact portion 292 is smaller than the radial width dimension of the inclined surface formed by the cover side inclined surface 293 and the clockwise CW side surface 299b of the cover side ice escape port 299. is there.

(Main effects of this form)
As described above, in the damper device 1 of this embodiment, the rotation output of the rotation drive unit 5 is transmitted to the cover 2 via the rotation / linear motion conversion mechanism 7 including the feed screw mechanism 70 to support the cover 2. The body 6 is moved linearly, and the opening of the cold air passage is switched by the cover 2. At this time, even if condensed water enters between the outer peripheral surface 310 of the rotating body 3 and the inner peripheral surface 200 of the rotating body arrangement hole 20, the dew condensation water passes through the water drainage path 8 and the rotating body arrangement hole 20. It flows out from the inside downward. For this reason, since it can suppress that condensed water freezes between the internal peripheral surface 200 of the rotary body arrangement | positioning hole 20, and the rotary body 3, adhesion of the cover 2 and the rotary body 3 resulting from freezing is suppressed. can do. Therefore, even when a system in which the cover 2 for switching the opening of the cold air passage is moved directly by the feed screw mechanism 70, it is possible to suppress the occurrence of malfunction due to icing of the condensed water.

  In addition, a notch 28 extending outward in the radial direction is formed in a part in the circumferential direction of the opening edge of the rotator arrangement hole 20, and the drainage path 8 is formed on the inner peripheral surface 200 of the rotator arrangement hole 20. And the notch 28. For this reason, the drainage path 8 can be configured by a design change such as forming the notch 28 in the cover 2.

  Further, the inner surface of the notch 28 is a tapered surface 280 inclined with respect to the central axis L. Therefore, the dew condensation water received by the notch 28 can flow out smoothly. Moreover, since the notch 28 is formed from the edge of the one side L1 to the edge of the other side L2 of the rotating body arrangement | positioning hole 20 in the center axis line L direction, it is easy to receive condensed water by the notch 28 and to flow out. Further, the notch 28 is formed in an arc shape when viewed from the direction of the central axis L, and the range in which the notch 28 is formed is wide. Therefore, it is easy for condensed water to be received by the notch 28 and to flow out.

  Further, the support 6 is a seal that overlaps between the outer peripheral surface 310 of the rotary body 3 and the inner peripheral surface 200 of the rotary body arrangement hole 20 when viewed from the central axis L direction at a position adjacent to the rotary body 3 in the central axis L direction. A plate 63 is provided. For this reason, even when the notch 28 is provided in the rotating body arrangement hole 20, it is possible to suppress the leakage of cold air through the notch 28. Further, the cover 2 has a protrusion 232 that comes into contact with the seal plate 63 when moved to the seal plate 63 side in the central axis L direction. For this reason, the leakage of cold air through the notch 28 can be suppressed.

  Further, in this embodiment, the stopper 4 is configured by bringing the cover-side convex portion 29 provided on the cover 2 into contact with the rotating-body-side convex portion 39 provided on the rotating body 3 to define the movable range of the cover 2. For this reason, in the feed screw mechanism 70, the protrusion 37 of the rotating body 3 does not come off from the groove 27 of the cover 2.

Here, when the condensed water freezes on the outer peripheral surface 310 of the rotator 3, when the cover-side convex portion 29 and the rotator-side convex portion 39 approach each other, the cover-side convex portion 29 and the rotator-side convex portion 39 Although the ice P is sandwiched, the ice P is discharged radially outward from between the cover-side convex portion 29 and the rotating body-side convex portion 39 via the cover-side ice escape portion 9a (ice escape portion 9). Is done. Therefore, it is possible to prevent the cover 2 from becoming immovable due to the cover-side convex portion 29 and the rotating body-side convex portion 39 being fixed by the ice P.

  Further, the cover 2 is formed with a cover-side ridge portion 231 extending along the opening edge of the rotating body arrangement hole 20 on the front end side (one side L1) in the central axis L direction. The cover-side convex portion 29 that protrudes protrudes radially inward from the cover-side protrusion 231. Therefore, the cover side ice escape port 299 of the cover side ice escape portion 9a can be configured by forming a notch in the cover side protrusion 231. Therefore, it is easy to discharge the ice radially outward from between the cover-side convex portion 29 and the rotating body-side convex portion 39 through the cover-side ice escape portion 9a.

  Further, since the cover-side ice escape opening 299 has a larger circumferential dimension than the radially inner side in the radial outer side, the cover-side ice escape portion 9a is inserted between the cover-side convex portion 29 and the rotating body-side convex portion 39. It is easy to discharge ice P through. Further, the counterclockwise CCW side (one side) end portion 290 of the cover-side convex portion 29 has a radial direction from the cover-side contact portion 292 that can contact the rotating body-side convex portion 39 and the cover-side contact portion 292. And a cover-side inclined surface 293 that is directed outward in the radial direction. For this reason, since the area where the cover side convex part 29 and the rotating body side convex part 39 abut is small, the ice P is not easily sandwiched between the cover side convex part 29 and the rotating body side convex part 39.

  Further, the cover-side inclined surface 293 constitutes an inclined surface 295 that is continuous with the clockwise CW side (the other side) surface 299 b of the cover-side ice escape port 299. For this reason, it is easy to discharge the ice P radially outward from between the cover side convex portion 29 and the rotating body side convex portion 39 through the cover side ice escape portion 9a. Further, the dimension in the radial direction of the cover side contact portion 292 is smaller than the width dimension in the radial direction of the inclined surface 295. For this reason, since the area where the cover side convex part 29 and the rotating body side convex part 39 abut is small, the ice P is not easily sandwiched between the cover side convex part 29 and the rotating body side convex part 39.

[Embodiment 2]
FIG. 6 is an explanatory view of the ice escape portion 9 of the damper device 1 according to Embodiment 2 of the present invention. FIG. 6A is a perspective view of the stopper 4 as viewed from one side L1 of the central axis L. FIG. 6B is an explanatory diagram of an ice escape portion provided in the stopper 4.

  As shown in FIG. 6, in this embodiment as well, in the same manner as in the first embodiment, the cover-side convex portion 29 that protrudes radially inward from the inner peripheral surface of the rotating body arranging hole 20 of the cover 2, and the cover-side convex portion 29 On the other hand, the stopper 4 provided with the rotating body side convex part 39 which can contact | abut from the counterclockwise CCW side around the central axis L (one side around the central axis L) is comprised. For this reason, as shown in FIG. 6B, when the cover-side convex portion 29 and the rotating body-side convex portion 39 approach each other, the ice P generated by freezing of water condensed on the outer peripheral surface of the rotating body 3 is generated. The cover side convex portion 29 and the rotating body side convex portion 39 are sandwiched.

  Therefore, in the present embodiment, in the rotating body 3, the cover-side convex portion 29 is provided radially inwardly with respect to the end portion 390 on the clockwise CW side (the other side around the central axis L) around the central axis L of the rotating body-side convex portion 39. And the rotor-side convex portion 39 approach each other, as indicated by an arrow Wb, the ice escape portion 9 (rotator-side ice) releases the ice P radially inward from between the cover-side convex portion 29 and the rotor-side convex portion 39. A relief 9b) is formed.

In this embodiment, the rotator 3 is provided with a rotator-side protrusion 311 along the outer edge of the bottom plate portion 32 on the front end side (one side L1) in the central axis L direction. It protrudes outward in the radial direction from the rotating body side protrusion 311. Therefore, in this embodiment, a notch is formed in the rotor-side protrusion 311, and the rotor-side ice escape port 399 of the rotor-side ice escape part 9 b is configured by the notch. Here, in the rotating body side ice escape port 399, of the surfaces 399a and 399b facing in the circumferential direction, the surface 299a located on the counterclockwise CCW side around the central axis L (the other side around the central axis L) has a diameter of 399a. The portion located on the inner side in the direction is an inclined surface inclined in a direction away from the surface 299b. For this reason, the rotor-side ice escape port 399 has a larger circumferential dimension on the radially inner side than on the radially outer side.

  Even in such a configuration, when the cover-side convex portion 29 and the rotating body-side convex portion 39 approach each other, the ice P is sandwiched between the cover-side convex portion 29 and the rotating-body-side convex portion 39, The ice P can be discharged radially outward from between the cover-side convex portion 29 and the rotator-side convex portion 39 via the rotator-side ice escape portion 9b (ice escape portion 9). Therefore, according to this embodiment, similarly to the first embodiment, the cover 2 is prevented from moving due to the cover-side convex portion 29 and the rotating body-side convex portion 39 being fixed by the ice P. be able to.

  In addition, since the rotor-side ice escape port 399 has a larger circumferential dimension on the radially inner side than on the radially outer side, the rotor-side ice escape part 9b is inserted between the cover-side convex portion 29 and the rotor-side convex portion 39. It is easy to discharge ice P through.

[Embodiment 3]
FIG. 7 is an explanatory view of the ice escape portion 9 of the damper device 1 according to Embodiment 3 of the present invention. FIG. 7A is a perspective view of the stopper 4 as viewed from one side L1 of the central axis L. FIG. 7B is an explanatory diagram of an ice escape portion provided in the stopper 4.

  As shown in FIG. 7, in this embodiment as well, in the same manner as in the first and second embodiments, the cover-side convex portion 29 that protrudes radially inward from the inner peripheral surface of the rotating body arranging hole 20 of the cover 2 and the cover-side convex portion The stopper 4 is provided with a rotating body-side convex portion 39 that can abut on the counterclockwise CCW side around the central axis L from the side 29 (one side around the central axis L).

  Also in this embodiment, as in the second embodiment, in the rotating body 3, radially inward with respect to the end portion 390 on the clockwise CW side (the other side around the central axis L) around the central axis L of the rotating body-side convex portion 39. When the cover-side convex portion 29 and the rotating body-side convex portion 39 approach each other, as indicated by an arrow Wb, the ice P escapes radially inward from between the cover-side convex portion 29 and the rotating-body-side convex portion 39. The escape part 9 (rotary body side ice escape part 9b) is comprised. In addition, a notch is formed in the rotor-side ridge portion 311, and the rotor-side ice escape port 399 of the rotor-side ice escape portion 9 b is configured by the notch. Further, the rotor-side ice escape port 399 has a larger circumferential dimension on the radially inner side than on the radially outer side.

  Further, in the present embodiment, as in the first embodiment, in the cover 2, on the outer side in the radial direction with respect to the end portion 290 of the counterclockwise CCW around the central axis of the cover-side convex portion 29 (one side around the central axis L), When the cover-side convex portion 29 and the rotator-side convex portion 39 approach each other, as indicated by an arrow Wa, an ice escape portion 9 for escaping ice radially outward from between the cover-side convex portion 29 and the rotator-side convex portion 39. (Cover side ice escape part 9a) is comprised. In addition, a notch is formed in the cover-side ridge portion 231, and the cover-side ice escape port 299 of the cover-side ice escape portion 9 a is configured by the notch. Here, the cover-side ice escape opening 299 has a larger circumferential dimension on the radially outer side than on the radially inner side. Further, the counterclockwise CCW side end 290 of the cover-side convex portion 29 has a cover-side contact portion 292 that can come into contact with the rotating body-side convex portion 39 and a radial direction outside the cover-side contact portion 292 in the radial direction. A cover-side inclined surface 293 facing outward is provided, and the cover-side inclined surface 293 constitutes an inclined surface 295 continuous with the clockwise CW-side surface 299b of the cover-side ice escape port 299. For this reason, the radial dimension of the cover side contact portion 292 is smaller than the radial width dimension of the inclined surface formed by the cover side inclined surface 293 and the clockwise CW side surface 299b of the cover side ice escape port 299. is there.

  In such a configuration, when the cover-side convex portion 29 and the rotating body-side convex portion 39 approach each other, the ice P is sandwiched between the cover-side convex portion 29 and the rotating-body-side convex portion 39. The ice P can be discharged radially outward from between the cover-side convex portion 29 and the rotator-side convex portion 39 via the rotator-side ice escaping portion 9b (ice escaping portion 9). It can discharge | emit to radial inside via the ice escape part 9a (ice escape part 9). Therefore, according to this embodiment, compared to the first and second embodiments, the cover 2 cannot be moved due to the cover side convex portion 29 and the rotating body side convex portion 39 being fixed by ice. Can be more reliably suppressed.

(Another embodiment)
In the above embodiment, the water drainage path 8 and the ice escape portion 9 prevent the cover 2 and the rotating body 3 from being fixed by ice, but a film heater may be provided on the inner surface of the cover 2 or the like. According to such a configuration, the cover 2 and the rotating body 3 can be prevented from being fixed by ice by heating the cover 2 at a predetermined timing by the film heater. Even when the cover 2 and the rotating body 3 are fixed by ice, the ice fixing the cover 2 and the rotating body 3 can be melted by heating the cover 2 with a film heater.

(Other embodiments)
In the above embodiment, the fan unit 101 is connected to the support 6. However, the present invention may be applied to the damper device 1 in which the support 6 and the fan unit 101 are arranged separately. .

  In the above embodiment, when the feed screw mechanism 70 is configured, the protrusion 37 is formed on the outer peripheral surface 310 of the rotating body 3 and the groove 27 is formed on the inner peripheral surface 200 of the rotating body arranging hole 20. A groove may be formed on the outer peripheral surface 310 of the body 3, and a protrusion may be formed on the inner peripheral surface 200 of the rotating body arrangement hole 20. In configuring the feed screw mechanism 70, a groove is formed on one of the outer peripheral surface 310 of the rotating body 3 and the inner peripheral surface 200 of the rotating body disposing hole 20, and a pin-like protrusion that fits into the groove is formed on the other. May be.

DESCRIPTION OF SYMBOLS 1 Damper apparatus 2 Cover 3 Rotating body 4 Stopper 5 Rotation drive part 6 Support body 7 Rotation linear motion conversion mechanism 8 Drain path 9 Ice escape part 9a Cover side ice escape part 9b Rotator side ice escape part 20 Rotator arrangement hole 27 Groove 28 Notch 29 Cover-side convex portion 37 Projection portion 39 Rotating body-side convex portion 63 Seal plate 70 Feed screw mechanism 100 Cold air passage 101 Fan unit 200 Inner peripheral surface 231 of the rotational body arrangement hole Cover-side projection 280 Tapered surface 292 Cover Side contact portion 293 Cover side inclined surface 295 Inclined surface 299 Cover side ice escape port 310 Rotating body outer peripheral surface 311 Rotating body side protrusion 399 Rotating body side ice escape port

Claims (10)

A support;
A rotational drive supported by the support;
A rotating body that is rotationally driven by the rotational driving unit;
The rotating body is provided with a rotating body arrangement hole arranged inside, and a cover for switching the opening degree of the cold air passage;
A feed screw mechanism configured between an outer peripheral surface of the rotating body and an inner peripheral surface of the rotating body disposition hole, wherein the rotating operation of the rotating body is linearly operated in the direction of the central axis of the rotating body of the cover; A rotary linear motion conversion mechanism that converts to
A water drainage path for allowing water condensed when the support is installed in the cold air passage to flow downward from the inside of the rotor arrangement hole;
A damper device characterized by comprising: A notch that extends outward in the radial direction is formed in a part of the circumferential direction of the opening edge of the rotating body arranging hole,
2. The damper device according to claim 1, wherein the drainage path includes an inner peripheral surface of the rotating body arrangement hole and the notch.   The damper device according to claim 2, wherein an inner surface of the notch has a tapered surface inclined with respect to the central axis.   4. The damper device according to claim 3, wherein the notch is formed from an edge on one side to an edge on the other side in the central axis direction of the rotating body arranging hole.   The damper device according to any one of claims 2 to 4, wherein the notch is formed in an arc shape when viewed from the central axis direction.   The support body includes a seal plate that overlaps the outer peripheral surface of the rotating body and the inner peripheral surface of the rotating body arrangement hole when viewed from the central axis direction at a position adjacent to the rotating body in the central axis direction. The damper apparatus as described in any one of Claims 1 thru | or 5 characterized by the above-mentioned.   The damper device according to claim 6, wherein the cover is in contact with the seal plate when moved to the seal plate side in the central axis direction.   The damper device according to any one of claims 1 to 7, wherein the cover is provided with a film heater.   The feed screw mechanism has a protrusion extending spirally on the outer peripheral surface of the rotating body and a spiral extending on the inner peripheral surface of the rotating body disposing hole, and the protrusion is fitted inside. The damper device according to claim 1, further comprising a groove.   The damper device according to claim 1, wherein a fan unit is connected to the support body.

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