JP5471710B2 - Air passage adjuster - Google Patents

Description

  The present invention relates to an air passage adjusting device that adjusts a flow state of air flowing through an air passage in a case by a plurality of doors having the same rotation axis.

  Conventionally, for example, it has a function of adjusting the flow state of the air flowing through the air passage in the case by two rotary doors, and the rotation axis of one door is cylindrical and the rotation axis of the other door is a cylinder. 2. Description of the Related Art A vehicle air conditioner is known that has a shape that is disposed inside the rotation axis of one of the doors and that has the same rotation axis of two rotary doors (see, for example, Patent Document 1 below).

Japanese Patent No. 3600345

  In the air passage adjusting device for adjusting the flow state of the air flowing through the air passage as in the above prior art, the door plate portion in the rotation axis direction is intended to stabilize the rotation trajectory of the door plate portion of each rotary door. An air passage in which rotary shafts are provided at both ends of the door, and for the purpose of reducing the number of parts, etc., the door plate portion of each rotary door, the rotary shaft, and a connecting portion for connecting the door plate portion and the rotary shaft are integrated. There is an adjustment device.

  In such an air passage adjusting device, when the cylindrical rotary shaft of the other door is disposed inside the cylindrical rotary shaft of one door, and the rotary axes of the two rotary doors are the same. However, there is a problem that at least one of the rotary doors needs to be bent and assembled, and the door plate portion and the rotating shaft of the door are easily deformed. The deformation of the door causes problems such as a decrease in the accuracy of adjusting the air flow state.

  The present invention has been made in view of the above points, and prevents the door from being deformed when the door plate portion and the rotating shaft portion are assembled so that the two rotating doors have the same rotating axis. It is an object of the present invention to provide an air passage adjusting device capable of achieving the above.

In order to achieve the above object, in the invention described in claim 1,
A case (21) forming an air passage in the interior;
A first door plate portion (41) and a pair of cylindrical first rotation shaft portions (42) protruding at both ends of the first door plate portion (41) in the rotation axis direction (AA); The first door plate (41) and the first rotating shaft portion (42) are integrated, and the first door plate (41) rotates about the first rotating shaft portion (42). )When,
The second door plate portion (51) and the columnar second rotary shaft portion (52) are provided, and the second door plate portion (51) and the second rotary shaft portion (52) are integrated. Two rotation shaft portions (52) are disposed inside each of the pair of first rotation shaft portions (42), and the second door plate portion (51) rotates around the second rotation shaft portion (52). A second door (50)
An air passage adjusting device that adjusts a flow state of air flowing through an air passage according to a rotational position of the first door plate portion (41) and the second door plate portion (51),
The second rotation shaft portion (52) has a length (D) equal to the diameter of the columnar shape and the entire area in the rotation axis direction (AA) of the portion disposed inside the first rotation shaft portion (42). A reduced width portion (523) having a cross-sectional shape having a width (W1) shorter than the length;
The first rotating shaft portion (42) has a width (W1) of the reduced width portion (523) over the entire region in the rotation axis direction (AA) of the portion where the second rotating shaft portion (52) is disposed on the inner side. A slit portion (421) having a width (W2) that is wider than the length (D) of the reduced width portion (523) extends in the direction of the rotation axis (AA) ,
The case (21) includes a bearing portion (211) that supports the outer peripheral surface of at least one of the first rotation shaft portion (42) and the second rotation shaft portion (52), and includes the first door (40) and the second door. A groove (531) extending in the circumferential direction about the rotation axis is formed on one of the doors (50), and the other of the first door (40) and the second door (50) has a rotation axis (AA). ) And a projection (431) that fits into the groove (531) is formed to restrict the rotation axis of the second door (50) from being displaced from the rotation axis of the first door (40) . .

According to this, the reduced width portion (523) of the second rotating shaft portion (52) of the second door (50) is inserted into the slit portion (421) of the first rotating shaft portion (42) of the first door (40). The second rotation is inserted into the first rotation shaft portion (42) so that the rotation axes of the first and second doors (40, 50) are the same by being inserted from the radial direction of the first rotation shaft portion (42). The shaft portion (52) can be arranged. Therefore, it is not necessary to bend and assemble the first door (40) and the second door (50). In this way, it is possible to prevent the door from being deformed when the first door (40) and the second door (50) are assembled with the same rotation axis.
In the state where the first door (40) and the second door (50) are assembled to the case (21), at least one of the first rotating shaft portion (42) and the second rotating shaft portion (52) is the case. The first door (40) and the second door (50) are supported by the bearing portion (211) of (21), and the rotation axes are relatively relative to each other due to the engagement between the protrusion (431) and the groove (531). It is restricted from shifting. Therefore, even if the circumferential positions of the gap portion (421) of the first rotating shaft portion (42) and the reduced width portion (523) of the second rotating shaft portion (52) coincide with each other, the second rotating shaft portion ( 52) that the reduced width portion (523) passes through the gap portion (421) of the first rotation shaft portion (42) and the rotation axis of the second door (50) deviates from the rotation axis of the first door (40). Can be prevented.

  In the invention according to claim 2, the first door (40) is formed in a circular arc shape at a position where the first door plate (41) is separated from the rotation axis by a predetermined amount, and the first door plate ( 41) and a pair of first rotating shaft portions (42) are rotary doors connected by a connecting portion (43). When the first door (40) is a rotary door, the first door plate (41) and the connecting portion (43) are greatly bent when the interval between the pair of first rotating shaft portions (42) is changed. The first door (40) is easily deformed. According to the invention of this claim, deformation of the first door (40), which is a rotary door, can be easily prevented.

In the invention according to claim 3,
The second door (50) has a pair of second rotating shaft portions (52) so as to protrude at both end sides of the second door plate portion (51) in the rotation axis direction (AA). The plate portion (51) is formed in a circular arc shape at a position away from the rotation axis by a predetermined amount, and the second door plate portion (51) and the pair of second rotation shaft portions (52) are coupled by the coupling portion (53). It is characterized by being a rotary door. When the second door (50) is a rotary door, the second door plate portion (51) and the connecting portion (53) are greatly bent when an attempt is made to change the distance between the pair of second rotating shaft portions (52). The second door (50) is easily deformed. According to the invention of this claim, deformation of the second door (50), which is a rotary door, can be easily prevented.

  In addition, the code | symbol in the parenthesis attached | subjected to each said means is an example which shows a corresponding relationship with the specific means as described in embodiment mentioned later.

It is a longitudinal cross-sectional view which shows schematic structure of the indoor unit 1 of the vehicle air conditioner using the air passage control apparatus in 1st Embodiment to which this invention is applied, and has shown the maximum cooling state and the face blowing mode state. FIG. 2 is a front view showing a schematic configuration of an air mix door 40 and a blowing mode door 50 disposed in the indoor unit 1. FIG. 3 is a view taken in the direction of arrow III in FIG. 2. It is the IV-IV sectional view taken on the line of FIG. It is the VV sectional view taken on the line of FIG. It is the VI-VI sectional view taken on the line of FIG. It is the VII-VII sectional view taken on the line of FIG. It is a longitudinal cross-sectional view which shows schematic structure of the indoor unit 1 of a vehicle air conditioner, and has shown the maximum heating state and the defroster blowing mode state. FIGS. 6A and 6B are diagrams for explaining rotational positions of the rotary shaft portion and the rotary shaft portion 52 in the same part as FIG. 5, in which FIG. 1A shows the state shown in FIG. 1 and FIG. . It is a side view which shows schematic structure of the air mix door 40 and the blowing mode door 50 arrange | positioned in the air conditioning unit 10 in 2nd Embodiment. It is the XI-XI sectional view taken on the line of FIG. It is a figure which shows the example of a shape of the reduced width part of the 2nd rotating shaft part in other embodiment. It is a figure which shows the example of a shape of the reduced width part of the 2nd rotating shaft part in other embodiment. It is sectional drawing which shows schematic structure of the air mix door 40 and the blowing mode door 50 in other embodiment.

  A plurality of modes for carrying out the present invention will be described below with reference to the drawings. In each embodiment, parts corresponding to the matters described in the preceding embodiment may be denoted by the same reference numerals, and redundant description may be omitted. In the case where only a part of the configuration is described in each embodiment, the other parts of the configuration are the same as those described previously. In addition to the combination of parts specifically described in each embodiment, the embodiments may be partially combined as long as the combination is not particularly troublesome.

(First embodiment)
FIG. 1 is a longitudinal sectional view showing a schematic configuration of an indoor unit 1 of a vehicle air conditioner using an air passage adjusting device according to a first embodiment to which the present invention is applied. 2 is a front view showing a schematic configuration of the air mix door 40 and the blow-out mode door 50 disposed in the indoor unit 1, and FIG. 3 is a view taken in the direction of arrow III in FIG. 4 is a sectional view taken along line IV-IV in FIG. 1, FIG. 5 is a sectional view taken along line VV in FIG. 4, FIG. 6 is a sectional view taken along line VI-VI in FIG. It is a VII-VII sectional view taken on the line.

  As shown in FIG. 1, the indoor unit 1 of the vehicle air conditioner of the present embodiment is installed in the posture shown in FIG. 1 at the lower part of the instrument panel in the vehicle interior, and is roughly divided into a fan unit 10 and an air conditioning unit 20. Two parts are integrally arranged side by side.

  The blower unit 10 is for sucking vehicle interior air or vehicle exterior air into the interior unit 1, and is provided with an inside / outside air switching box (not shown) in the vehicle width direction (the front and back direction in FIG. 1). Has been.

  The blower unit 10 is provided with an electric blower 11. The blower 11 includes a centrifugal multiblade fan 12 and a fan driving motor 13, and the centrifugal multiblade fan 12 is disposed in a scroll casing 14. A duct portion 15 that forms a flow path extending from the outlet of the scroll casing 14 is formed on the air flow downstream side of the scroll casing 14 of the blower unit 10. The duct portion 15 connects the outlet portion of the blower unit 10 to the inlet portion of the air conditioning unit 20.

  The air conditioning unit 20 is of a type in which a heater core (heating heat exchanger, heating heat exchanger) 23 is built in one common air conditioning case (corresponding to the case in the present invention) 21.

  The air-conditioning case 21 is made of a resin molded product having a certain degree of elasticity and excellent strength, such as polypropylene, and is composed of a plurality of divided cases. The divided cases are housed together with the heater core 23 and a door, which will be described later, and then integrally joined by a fastening means such as a metal spring clip or a screw to form an air conditioning case 21.

  In the present embodiment, the air conditioning case 21 is integrally formed with the scroll casing 14 and the duct portion 15.

  An air inlet 24 is provided at the front side (left side in the figure) of the air conditioning case 21, and air blown from the blower unit 10 is passed through the duct portion 15 to the air inlet 24. Inflow.

  In the air conditioning case 21, a heater core 23 is disposed on the downstream side of the air flow from the air inlet 24. The heater core 23 heats the air flowing in from the air inlet 24, and hot engine cooling water (hot water) flows through the heater core 23, and heats the air using the cooling water as a heat source.

  In the air conditioning case 21, a cold air passage 25, which is a bypass passage through which air (cold air) flows by bypassing the heater core 23, is formed above the heater core 23. On the other hand, in the air conditioning case 21, a warm air passage 28 is formed on the downstream side of the air flow of the heater core 23 from the immediately after the heater core 23 toward the upper side. In the downstream side of the cool air passage 25, there is a cold / hot air mixing space 30 in which the cool air from the cold air passage 25 and the warm air from the hot air passage 28 are merged from the intersecting direction to mix the cool air and the hot air. Is formed.

  An air mix door 40 that adjusts the air volume ratio between the air passing through the heater core 23 (warm air) and the air passing through the cool air passage 25 (cold air) is disposed on the downstream side (upper side) of the heater core 23. The air mix door 40 corresponds to a first door in the present embodiment.

  On the upper surface of the air conditioning case 21, a defroster opening 31 is opened at a front portion of the vehicle. This defroster opening 31 is where the temperature-controlled air flows from the cold / hot air mixing space 30 and is connected to a defroster outlet through a defroster duct (not shown), and from this outlet to the inner surface of the vehicle front window glass. The wind is blown out.

  On the upper surface of the air-conditioning case 21, a face opening 33 is opened at a position on the vehicle rear side of the defroster opening 31. The face opening 33 also receives the temperature-controlled air from the cold / hot air mixing space 30. The face opening 33 is connected to a face air outlet through a face duct (not shown), and wind is blown out from the air outlet toward an occupant head in the passenger compartment.

  Further, in the rear surface portion of the air conditioning case 21, a foot opening 35 is opened at a site on the vehicle lower side. The foot opening 35 also receives temperature-controlled air from the cold / hot air mixing space 30, and the downstream side of the foot opening 35 is connected to a foot outlet through a foot duct (not shown). The wind blows from the exit toward the feet of the passengers.

  The plurality of openings described above, that is, the defroster opening 31, the face opening 33, and the foot opening 35 are opened and closed by the blowing mode door 50. The blowing mode door 50 is configured to form a blowing mode in which any one or more of the defroster opening 31, the face opening 33, and the foot opening 35 are opened according to the rotation stop position. The blowing mode door 50 corresponds to the second door in the present embodiment.

  The vehicle air conditioner configured as described above includes, for example, an electronic control device (not shown) to which operation signals from various operation members provided on an air conditioning operation panel and sensor signals from various sensors for air conditioning control are input. The position of each door 40, 50 is controlled by the output signal of this control device.

  As shown in FIGS. 2, 3 and 4, the air mix door 40 is made of, for example, a resin material and has a door plate portion (corresponding to a first door plate portion) formed in an arcuate surface shape with a predetermined amount away from the rotation axis. ) 41, a pair of substantially cylindrical rotating shaft portions (corresponding to the first rotating shaft portion) 42 disposed on the rotation axis, and a substantially fan-shaped side plate connecting the door plate portion 41 and the rotating shaft portion 42. Part (corresponding to a connecting part) 43 is integrally formed, and the door plate part 41 is a rotary door that rotates around the rotating shaft part 42.

  The air mix door 40 has a pair of rotation shaft portions 42 on both ends of the door plate portion 41 in the rotation axis direction (AA direction in the drawing), and the side plate portions 43 are both ends of the door plate portion 41 in the rotation axis direction. And a pair of rotating shaft portions 42 are coupled. Each rotation shaft portion 42 is extended so that the distal end portion 42b protrudes outward with the base end portion 42a at substantially the same position as the end portion of the door plate portion 41 in the rotation axis direction. The base end portion 42 a is connected to the side plate portion 43.

  On the other hand, the blow-out mode door 50 is also made of, for example, a resin material, and is disposed on the rotation axis line with a door plate part (corresponding to the second door plate part) 51 formed in an arcuate surface separated by a predetermined amount from the rotation axis line. A pair of substantially cylindrical rotating shaft portions (corresponding to a second rotating shaft portion) 52 and a substantially disk-shaped side plate portion (corresponding to a connecting portion) 53 that connects the door plate portion 51 and the rotating shaft portion 52 are integrated. It is the rotary door which is shape | molded and the door board part 51 rotates centering on the rotating shaft part 52. As shown in FIG.

  The blow-out mode door 50 has a pair of rotation shaft portions 52 on both ends of the door plate portion 51 in the rotation axis direction (AA direction in the drawing), and the side plate portions 53 are both ends of the door plate portion 51 in the rotation axis direction. And a pair of rotating shaft portions 52 are coupled. Each rotation shaft portion 52 extends so that a distal end portion 52b protrudes outward with a base end portion 52a at substantially the same position as the end portion of the door plate portion 51 in the rotation axis direction. The base end portion 52 a is connected to the side plate portion 53.

  The rotation shaft portion 52 of the blow-out mode door 50 is disposed inside the rotation shaft portion 42 of the air mix door 40, and the axis line of the rotation shaft portion 42 and the axis line of the rotation shaft portion 52 substantially coincide with each other. . Further, the separation distance from the rotation axis of the door plate portion 41 of the air mix door 40 (the axis of the rotation shaft portion 42) is from the rotation axis of the door plate portion 51 of the blowout mode door 50 (the axis of the rotation shaft portion 52). It is set larger than the separation distance.

  The dimension in the rotation axis direction of the door plate portion 41 of the air mix door 40 is set to be larger than the dimension in the rotation axis direction of the door plate portion 51 of the blowing mode door 50, and the distance between the side plate portions 43 of the air mix door 40. Is wider than the interval between the side plate portions 53 of the blowing mode door 50. In other words, the pair of side plate portions 43 of the air mix door 40 are located outward in the rotational axis direction than the pair of side plate portions 53 of the blowout mode door 50.

  As shown in FIG. 4, each of the pair of rotating shaft portions 42 of the air mix door 40 has a two-stage cylindrical shape with different inner diameters, and the inner diameter of the portion on the distal end portion 42b side is the proximal end portion. It is smaller than the inner diameter of the part on the 42a side. And the internal diameter of the site | part by the side of the front-end | tip part 42b is substantially the same as the outer diameter of the rotating shaft part 52 of the blowing mode door 50 (strictly speaking, the inner diameter of the site | part by the side of the front-end | tip part 42b of the rotating shaft part 42 is It is set slightly larger than the outer diameter of the rotating shaft portion 52).

  The rotary shaft portion 42 on the left side of the air mix door 40 shown in FIG. 4 has a bottomed cylindrical shape with the end on the front end portion 42b side closed, and further toward the outside from the closed front end portion 42. Thus, an input shaft portion 42c for inputting a rotational driving force to the air mix door 40 protrudes.

  The rotary shaft portion 42 on the right side of the air mix door 40 in FIG. 4 is open at the end portion 42 b side, and the front end portion 52 b of the rotary shaft portion 52 of the blowing mode door 50 is connected to the air mix door 40. An input shaft portion 52c for inputting a rotational driving force to the blow-out mode door 50 protrudes further outward from the tip portion 52b.

  As shown in FIG. 4, the air conditioning case 21 includes a cylindrical first bearing portion 211 on the left side wall surface portion in the figure, and both the cylindrical first bearing portion 211 and the right side wall surface portion in the figure on the right side. A second bearing portion 212 is provided. The inner diameter of the first bearing portion 211 is larger than the inner diameter of the second bearing portion 212, and the second bearing portion 212 is more axial than the first bearing portion 211 on the right side wall surface of the air conditioning case 21 in the figure. In FIG. 2, a two-stage cylindrical portion is formed so as to be located on the outer side of the air conditioning case 21.

  The inner diameter of the first bearing portion 211 is substantially the same as the outer diameter of the rotating shaft portion 42 of the air mix door 40 (strictly speaking, the inner diameter of the first bearing portion 211 is slightly smaller than the outer diameter of the rotating shaft portion 42. The inner peripheral surface of the first bearing portion 211 and the outer peripheral surface of the rotating shaft portion 42 of the air mix door 40 are in sliding contact with each other. Thereby, the 1st bearing part 211 of the air-conditioning case 21 is supporting the air mix door 40 so that rotation is possible centering | focusing on a rotating shaft line.

  The inner diameter of the second bearing portion 212 is substantially the same as the outer diameter of the rotating shaft portion 52 of the blowout mode door 50 (strictly speaking, the inner diameter of the second bearing portion 212 is slightly smaller than the outer diameter of the rotating shaft portion 52. Is set to be large). Further, as described above, the inner diameter of the rotating shaft portion 42 of the air mix door 40 (the inner diameter of the portion on the tip end 42 b side) is also substantially the same as the outer diameter of the rotating shaft portion 52 of the blow-out mode door 50.

  In the right side wall surface of the air conditioning case 21 in FIG. 4, the inner peripheral surface of the second bearing portion 212 and the outer peripheral surface of the rotary shaft portion 52 of the blow-out mode door 50 extend over the entire circumference with play. (See FIG. 7). Thereby, the 2nd bearing part 212 of the air-conditioning case 21 is supporting the blowing mode door 50 so that rotation is possible centering | focusing on a rotating shaft line.

  On the left side wall surface of the air conditioning case 21 in FIG. 4, the inner peripheral surface of the rotary shaft portion 42 of the air mix door 40 and the outer peripheral surface of the rotary shaft portion 52 of the blow mode door 50 are in sliding contact with play. The inner peripheral surface of the first bearing portion 211 and the outer peripheral surface of the rotary shaft portion 42 of the air mix door 40 are in sliding contact with play. Thereby, the 1st bearing part 211 of the air-conditioning case 21 is supporting the blowing mode door 50 so that rotation is possible centering | focusing on a rotating shaft line via the rotating shaft part 42 of the air mix door 40. FIG.

  With the above-described configuration, the air mix door 40 and the blowing mode door 50 assembled in the air conditioning case 21 with the same rotation axis can be rotated without interfering with each other.

  As shown in FIGS. 5 and 6, the rotation shaft portion 52 of the blowout mode door 50 has a cylindrical shape that is recessed (deleted) from the outer peripheral surface side at two locations in the circumferential direction. A pair of parallel flat portions (outer surface portions) 522 located on the inner side of the cylindrical outer peripheral surface are formed by a pair of recessed portions 521 that are recessed from each other with the rotation axis therebetween.

  That is, the rotation shaft portion 52 has a cross section orthogonal to the axial direction composed of a pair of arcs (an arc that is a part of a cylindrical outer circumferential circle) and a pair of straight lines that connect the ends of the pair of arcs. It has a substantially oval shape.

  Thus, the rotation shaft portion 52 is contracted by the pair of parallel flat portions 522 so that the width (interval between the pair of flat portions 522) W1 of the pair of flat portions 522 is smaller than the cylindrical outer diameter (diameter) D. A width portion 523 is provided. The reduced width portion 523 is formed over the entire region of the rotation shaft portion 52 disposed at least inside the rotation shaft portion 42 of the air mix door 40 in the rotation axis direction (the front and back direction in the drawing). ing.

  On the other hand, the rotary shaft portion 42 of the air mix door 40 is formed with a slit portion (gap portion) 421 extending in the rotation axis direction (front and back direction in the drawing). The width W2 of the slit portion 421 is wider than the width W1 of the reduced width portion 523 of the rotation shaft portion 52 (the space between the flat surface portions 522) (slightly wider in this example). It is narrower than the outer diameter D of the cylindrical shape (in this example, it is extremely narrow).

  The slit portion 421 is formed over the entire region where the rotation shaft portion 52 of the blowing mode door 50 is disposed at least inside the rotation shaft portion 42 in the rotation axis direction.

  In other words, the rotation shaft portion 52 has a length D equal to the diameter of the columnar shape and a width W1 shorter than the length over the entire region in the rotation axis direction AA of the portion disposed inside the rotation shaft portion 42. It has a reduced width portion 523 having a cross-sectional shape, and the rotation shaft portion 42 has a width W1 of the reduced width portion 523 across the entire region in the rotation axis direction AA of the portion where the rotation shaft portion 52 is disposed inside. Also, a slit portion 421 having a width W2 that is wider and narrower than the length D of the reduced width portion 523 is extended in the rotation axis direction AA.

  When assembling the air mix door 40 and the blow mode door 50 to the air conditioning case 21, first, the air mix door 40 and the blow mode door 50 are brought close to each other so that the axial directions of the rotary shaft portions 42 and 52 are parallel to each other. The reduced width portion 523 of the rotary shaft portion 52 of the blowout mode door 50 is inserted from the radially outward direction of the rotary shaft portion 42 into the slit portion 421 of the rotary shaft portion 42 of the air mix door 40.

  That is, the pair of flat surface portions 522 of the rotation shaft portion 52 of the blow-out mode door 50 are along the inner surface of the slit portion 421 of the rotation shaft portion 42 of the air mix door 40 (surfaces facing in the circumferential direction of the rotation shaft portion 42). The rotating shaft portion 52 is disposed in the rotating shaft portion 42 by being relatively moved so as to pass through. In other words, the reduced width portion 523 of the rotation shaft portion 52 is formed in the major axis direction of a substantially oval cross section of the reduced width portion 523 (the direction having a length D equal to the diameter of the columnar shape, in the cross section of the reduced width portion 523. The rotary shaft portion 52 is disposed in the rotary shaft portion 42 so as to pass through the slit portion 421 of the rotary shaft portion 42. Thereby, the rotation axis line of the air mix door 40 and the blowing mode door 50 becomes the same.

  Further, when the air mix door 40 and the blowing mode door 50 are relatively rotated, the major axis direction of the reduced width portion 523 of the rotary shaft portion 52 is shifted from the direction in which the slit portion 421 of the rotary shaft portion 42 is formed. And the blow-out mode door 50 serve as an assembly that maintains the same rotational axis.

  The assembled body of the air mix door 40 and the blow-out mode door 50 assembled in this way is housed in the air conditioning case 21 when the air conditioning case 21 is configured by combining a plurality of divided cases, and the air mix The door 40 and the blowing mode door 50 are rotatably supported by the air conditioning case 21.

  Next, based on the said structure, the action | operation of the indoor unit 1 of a vehicle air conditioner is demonstrated easily.

  When the air blowing unit 10 is operated with respect to the air conditioning unit 20 configured as described above, the air blown from the air blowing unit 10 flows into the air conditioning unit 20 through the air inlet 24. Then, the inflow air is distributed by the air mix door 40 into a portion flowing through the cold air passage 25 and a portion heated by the heater core 23. Thereafter, the hot air heated by the heater core 23 and flowing through the hot air passage 28 and the cold air from the cold air passage 25 are mixed in the cold / hot air mixing space 30.

  The conditioned air in which the cool air and the warm air are mixed in the cool / warm air mixing space 30 flows in the direction of the respective outlets on the downstream side, flows into the opening that opens according to the blow mode formed by the blow mode door 50, It is blown out into the passenger compartment.

  In FIG. 1, the air mix door 40 is in a position for setting a maximum cooling state (max cool state) in which the cold air passage 25 is fully opened and the hot air passage 28 is fully closed, and the blowing mode door 50 is in the face opening 33. The state which exists in the position which sets face blowing mode which opens and closes other opening parts is shown.

  When the air mix door 40 rotates in the clockwise direction shown in FIG. 1 from the state shown in FIG. 1, the ratio of the cool air flowing into the cool / warm air mixing space 30 decreases and the ratio of the hot air increases. The air mix door 40 can be rotated to the position shown in FIG.

  On the other hand, when the blowing mode door 50 rotates in the clockwise direction shown in FIG. 1 from the state shown in FIG. 1, the blowing mode of the conditioned air blown from the cold / hot air mixing space 30 into the vehicle interior is the bi-level mode (face opening). Mode in which the air volume is distributed substantially evenly between the portion 33 and the foot opening 35), foot mode (mode in which a small portion is allocated to the foot opening 35 and the air volume is distributed to the defroster opening 31), foot defroster mode (defroster opening) The mode is changed in the order of the air volume to the portion 31 and the foot opening 35 almost uniformly) and the defroster mode. The blowing mode door 50 can be rotated to the position shown in FIG.

  In FIG. 8, the air mix door 40 is in a position where a maximum heating state (maximum hot state) in which the cold air passage 25 is fully closed and the hot air passage 28 is fully open, and the blowing mode door 50 is in the defroster opening 31. The state which exists in the position which sets defroster blowing mode which opens and closes other opening parts is shown.

  As described above, the air conditioning unit 20 is provided in the air conditioning case 21 according to the rotation positions of the air mix door 40 and the blowout mode door 50, that is, according to the rotation of the door plate portion 41 and the door plate portion 51. An air passage adjusting device for adjusting a flow state of the air flowing through the air passage is provided.

  FIG. 9 shows the rotation positions of the rotary shaft portion 42 and the rotary shaft portion 52 at the same site as in FIG.

  When the air mix door 40 is in the state shown in FIG. 1, the rotary shaft portion 42 is in the position shown in FIG. When the air mix door 40 is rotated from the state shown in FIG. 1 to the state shown in FIG. 8, the rotary shaft portion 42 is rotated as indicated by the solid line arrow shown in FIG. 9 is in the position shown in FIG. 9 (b).

  On the other hand, when the blowout mode door 50 is in the state shown in FIG. 1, the rotating shaft 52 is in the position shown in FIG. When the blowing mode door 50 is rotated from the state shown in FIG. 1 to the state shown in FIG. 8, the rotary shaft portion 52 is rotated as indicated by the broken line arrow shown in FIG. In the state shown in FIG. 9, the rotary shaft 52 is in the position shown in FIG.

  When the rotary shaft portion 42 and the rotary shaft portion 52 rotate within such a range, the major axis direction of the reduced width portion 523 of the rotary shaft portion 52 coincides with the slit portion 421 forming direction viewed from the center of the rotary shaft portion 42. (For example, when the frequency is low but the defroster mode is set in the max cool state). However, at this time as well, as shown in FIG. 7, the inner peripheral surface of the second bearing portion 212 and the outer peripheral surface of the rotary shaft portion 52 of the blow-out mode door 50 are in sliding contact over the entire periphery. Since the rotation shaft portion 52 is supported by the bearing portion 212, the rotation shaft portion 52 does not come out of the rotation shaft portion 42. That is, the rotation axis of the rotation shaft portion 42 and the rotation axis of the rotation shaft portion 52 do not deviate.

  According to the above-described configuration and operation, the air conditioning unit 21 includes the pair of cylindrical rotation shaft portions 52 of the blowout mode door 50 disposed inside the pair of cylindrical rotation shaft portions 42 of the air mix door 40. Each door is rotated with the same rotation axis. The rotation shaft portion 52 has a cross section having a length D equal to the diameter of the columnar shape and a width W1 shorter than the length over the entire region in the rotation axis direction AA of the portion disposed inside the rotation shaft portion 42. A reduced width portion 523 having a shape is provided. On the other hand, the rotation shaft portion 42 is wider than the width W1 of the reduced width portion 523 and longer than the length D of the reduced width portion 523 over the entire region in the rotation axis direction AA of the portion where the rotation shaft portion 52 is disposed inside. A slit portion 421 having a narrow width W2 extends in the rotation axis direction AA.

  Therefore, the rotation shaft portion 52 is disposed inside the rotation shaft portion 42 by inserting the reduced width portion 523 of the rotation shaft portion 52 into the slit portion 421 of the rotation shaft portion 42 from the radially outward direction of the rotation shaft portion 42. it can. In this way, the air mix door 40 and the blow mode door 50 can be assembled with the same rotation axis without bending the air mix door 40 and the blow mode door 50, and both doors are deformed. This can be prevented.

  Each of the air mix door 40 and the blow-out mode door 50 has a pair of rotating shaft portions on both ends of the door plate portion in the rotation axis direction AA, and the door plate portion is formed apart from the rotation axis by a predetermined amount. This is a rotary door in which a door plate portion and a pair of rotating shaft portions are connected by a side plate portion. In the rotary door having such a shape, when the interval between the pair of rotating shaft portions is changed, the door plate portion and the side plate portion are easily bent and deformed easily. However, since the present invention is applied, the deformation is easily prevented. be able to.

  In the air conditioning case 21, the first bearing portion 211 supports the rotating shaft portion 42 of the air mix door 40, and the second bearing portion 212 supports the rotating shaft portion 52 of the blowing mode door 50. Therefore, in the state incorporated in the air conditioning case 21, both doors 40, 50 are rotated and the circumferential direction between the slit portion 421 of the rotating shaft portion 42 and the narrow portion of the reduced width portion 523 of the rotating shaft portion 52 is increased. Even if the positions match, the reduced width portion 523 of the rotation shaft portion 52 does not pass through the slit portion 421 of the rotation shaft portion 42 and the rotation axes of the doors 40 and 50 do not deviate from each other.

(Second Embodiment)
Next, a second embodiment will be described based on FIG. 10 and FIG.

  Compared with the first embodiment described above, the second embodiment has a restricting structure that restricts the displacement of the rotation axes between the air mix door 40 and the blowout mode door 50. Is different. In addition, about the part similar to 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  FIG. 10 is a side view showing a schematic configuration of the air mix door 40 and the blowing mode door 50 disposed in the air conditioning unit 10, and FIG. 11 is a cross-sectional view taken along the line XI-XI of FIG.

  As shown in FIG. 11, in the present embodiment, the side plate portion 53 of the blowing mode door 50 is formed with a thick portion 53 a around the rotating shaft portion 52 that is thicker than other portions. The thick portion 53a is formed with a groove portion 531 that is recessed from the outer side in the rotational axis direction AA (from the upper side in FIG. 11). As shown in FIG. 10, the groove 531 is formed in a circumferential shape centered on the rotation axis.

  On the other hand, as shown in FIG. 11, the side plate portion 43 of the air mix door 40 is formed with a protrusion 431 that protrudes inward in the rotational axis direction AA. The protrusion 431 is formed at a position corresponding to the position where the groove 531 of the blowout mode door 50 is formed (the distance from the rotation axis to the groove 531 is equal to the distance from the rotation axis to the protrusion 431). ), The tip of the protrusion 431 is loosely fitted into the groove 531 (softly fitted).

  The engagement relationship between the projecting portion 431 and the groove portion 531 restricts the rotational axes of the air mix door 40 and the blowout mode door 50 from shifting.

  As shown in FIG. 11, when the air mix door 40 and the blowing mode door 50 are assembled to the air conditioning case 21, the first bearing portion (corresponding to the bearing portion) 211 of the air conditioning case 21 is the outer periphery of the rotating shaft portion 42. The air mix door 40 is slidably contacted with the surface, and is supported so as to be rotatable about the rotation axis. Further, the first bearing portion 211 of the air conditioning case 21 supports the blowing mode door 50 so as to be rotatable about the rotation axis via the rotation shaft portion 42 of the air mix door 40.

  According to the configuration of the present embodiment described above, the air conditioning case 21 includes the first bearing portion 211 that is a bearing portion that supports the outer peripheral surface of the rotating shaft portion 42 of the airmic door 40. A groove portion 531 extending in the circumferential direction around the rotation axis is formed, and the air mix door 50 is formed with a protrusion 431 that protrudes in the rotation axis direction AA and loosely fits in the groove 531. Is deviated from the rotational axis of the air mix door 40.

  Therefore, in the state incorporated in the air conditioning case 21, both doors 40, 50 are rotated and the circumferential direction between the slit portion 421 of the rotating shaft portion 42 and the narrow portion of the reduced width portion 523 of the rotating shaft portion 52 is increased. Even if the positions match, the reduced width portion 523 of the rotation shaft portion 52 does not pass through the slit portion 421 of the rotation shaft portion 42 and the rotation axes of the doors 40 and 50 do not deviate from each other.

  In the example described above, the rotating shaft portion 42 of the airmic door 40 is supported by the bearing portion 211 of the air conditioning case 21, but the bearing portion of the air conditioning case 21 supports at least one of the air mix door 40 and the blowing mode door 50. Anything to do.

  Moreover, although the groove part 531 was provided in the blowing mode door 50 side and the projection part 431 was provided in the air mix door 40 side, it may be reverse. Moreover, the formation part of a groove part and a projection part does not need to be a side plate part.

  In the above example, the groove portion 531 is formed in a circular shape with the rotation axis as the center. However, when the doors 40 and 50 are relatively rotated, the protrusion portion 431 and the groove portion 531 are engaged. If the relationship is maintained, the groove portion 531 may be extended to a part in the circumferential direction.

(Other embodiments)
The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

  In each of the embodiments described above, the reduced width portion 523 of the rotating shaft portion 52 is formed by a pair of parallel plane portions 522 positioned on the inner side of the cylindrical outer peripheral surface, but is not limited thereto. The pair of recesses recessed from the outer peripheral side form a pair of outer surface portions located on the inner side of the cylindrical outer peripheral surface across the rotation axis, and the width of the pair of outer surface portions is the outer diameter of the cylindrical shape It only has to be smaller.

  For example, as shown in FIG. 12, a pair of outer surface portions 522A recessed inward may be positioned on the inner side of the outer peripheral surface of the columnar shape with the rotation axis interposed therebetween to form the reduced width portion 523. . Further, the pair of outer surface portions may not be symmetrical positions with respect to the axis, and for example, as shown in FIG. 13, the reduced width portion 523 is formed by a pair of flat portions 522B having different widths on both sides. May be. In the example shown in FIG. 13, if the narrower width portion 523 of the rotating shaft portion 52 is inserted into the slit portion 421 of the rotating shaft portion 42 with the narrower width of the pair of plane portions 522B as the head, the assembling work is easy. is there.

  Moreover, in each said embodiment, the input shaft part 42c provided in the rotating shaft part 42 of the air mix door 40, and the input shaft part 52c provided in the rotating shaft part 52 of the blowing mode door 50 are an air-conditioning case in a rotating shaft direction. However, the present invention is not limited to this. For example, as shown in FIG. 14, the input shaft portions 42c and 52c may be on the same side.

  Moreover, in each said embodiment, although the air mix door 40 and the blowing mode door 50 each had a pair of rotating shaft parts in the both end sides of the door board part in a rotating shaft direction, it is limited to this. Instead, for example, a door having a cylindrical rotation shaft portion (in the above example, the blowing mode door 50) includes one rotation shaft portion that protrudes outward from both ends of the door plate portion in the rotation axis direction. There may be.

  Moreover, in each said embodiment, although the air mix door 40 and the blowing mode door 50 were all rotary doors, it is not limited to this. For example, one may be a rotary door and the other may be a cantilever type plate door, or both may be cantilever type plate doors.

  Moreover, in each said embodiment, although the 1st door was the air mix door 40 and the 2nd door was the blowing mode door 50, it is not limited to this, For example, both 1st and 2nd doors It can be a blowout mode door.

  Moreover, in each said embodiment, although the air conditioning unit 20 was not provided with the heat exchanger for cooling, it may be an air conditioning unit provided with the heat exchanger for cooling.

  Moreover, in each said embodiment, the air path adjustment apparatus which adjusts the flow state of the air which flows through an air path according to the rotation position of the 1st door board part of a 1st door, and the 2nd door board part of a 2nd door. However, the present invention is not limited to this, and the present invention is effective when applied widely to, for example, an air passage adjusting device used in a stationary air conditioner. is there.

21 Air-conditioning case (case)
40 Air mix door (first door)
41 Door plate (first door plate)
42 Rotating shaft (first rotating shaft)
43 Side plate (connecting part)
50 Blowout mode door (second door)
51 Door plate part (second door plate part)
52 Rotating shaft (second rotating shaft)
53 Side plate (connecting part)
211 1st bearing part (bearing part)
212 Second bearing portion 421 Slit portion (gap portion)
431 Projection part 521 Concave part 522 Plane part (outer surface part)
523 Reduced width portion 531 Groove portion

Claims (3)

A case (21) forming an air passage in the interior;
A first door plate portion (41) and a pair of cylindrical first rotation shaft portions (42) protruding at both ends of the first door plate portion (41) in the rotation axis direction (AA); The first door plate portion (41) and the first rotating shaft portion (42) are integrated, and the first door plate portion (41) rotates around the first rotating shaft portion (42). A first door (40);
It has a 2nd door board part (51) and a cylindrical 2nd rotating shaft part (52), and the said 2nd door board part (51) and the said 2nd rotating shaft part (52) are integral. The second rotation shaft portion (52) is disposed inside each of the pair of first rotation shaft portions (42), and the second door plate portion (51) is disposed on the second rotation shaft portion (52). And a second door (50) that pivots about
An air passage adjusting device that adjusts a flow state of air flowing through the air passage according to a rotation position of the first door plate portion (41) and the second door plate portion (51),
The second rotation shaft portion (52) has a length (D) equal to the diameter of the columnar shape in the entire region in the rotation axis direction (AA) of the portion disposed inside the first rotation shaft portion (42). ) And a reduced width portion (523) having a cross-sectional shape having a width (W1) shorter than the length,
In the first rotation shaft portion (42), the width (523) of the reduced width portion (523) is provided in the entire region in the rotation axis direction (AA) of the portion where the second rotation shaft portion (52) is disposed inside. A slit portion (421) having a width (W2) that is wider than W1) and narrower than the length (D) of the reduced width portion (523) extends in the rotational axis direction (AA) ;
The case (21) includes a bearing portion (211) that supports an outer peripheral surface of at least one of the first rotating shaft portion (42) and the second rotating shaft portion (52),
One of the first door (40) and the second door (50) is formed with a groove (531) extending in the circumferential direction about the rotation axis, and the first door (40) and the second door (50) are formed. On the other side of the two doors (50), a protrusion (431) that protrudes in the rotation axis direction (AA) and fits in the groove (531) is formed, and the rotation axis of the second door (50) is the first door. An air passage adjusting device for restricting deviation from a rotation axis of a door (40) .   The first door (40) is formed in a circular arc shape at a position where the first door plate portion (41) is separated from the rotation axis by a predetermined amount, and the first door plate portion (41) and a pair of the first doors (41). 2. The air passage adjusting device according to claim 1, wherein the rotary passage portion is a rotary door connected to the one rotating shaft portion by a connecting portion.   The second door (50) includes a pair of second rotating shaft portions (52) protruding at both end sides of the second door plate portion (51) in the rotation axis direction (AA), and A two-door plate portion (51) is formed in a circular arc shape at a position away from the rotation axis by a predetermined amount, and the second door plate portion (51) and the pair of second rotation shaft portions (52) are connected to each other. The air passage adjusting device according to claim 1 or 2, wherein the air passage adjusting device is a rotary door connected by (53).

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