JP2011121537A - Vehicular air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To stably secure sealability of a damper, even if a variation in respective parts in manufacture and deformation of the respective parts by a temperature change are caused when closing an air flow passage by the damper. <P>SOLUTION: The damper 76 has an elastically deformable flexible part 87a continuously arranged on a closing plate 87, A casing 30 is provided with a closing position engaging part 89 engaging with the flexible part 87a when the damper 76 exists in a closing position of the air flow passage. The closing position engaging part 89 is positioned so that the closing plate 87 is pressed to the casing 30 by elastic force of the flexible part 87a when the flexible part 87a is in an engaged state. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a vehicle air conditioner including a damper that opens and closes an air flow path.

  DESCRIPTION OF RELATED ART Conventionally, what was provided with the casing which has an air flow path and the damper arrange | positioned in a casing is known as a vehicle air conditioner (for example, refer patent document 1).

  The damper includes a plate-like closing portion for closing the air flow path, and a support shaft that rotatably supports the closing portion on the casing, and is driven via a link mechanism or the like. Yes. On the other hand, an abutting portion with which the peripheral edge of the closing portion abuts is formed in the casing.

  Then, when the damper is operated until the peripheral edge of the damper's closing part comes into contact with the contact part of the casing, the air flow path is closed, and the peripheral part of the closing part comes into contact with the contact part of the casing. The gap between the peripheral edge of the part and the casing is sealed.

JP-A-11-263115

  However, the damper, casing, link for driving the damper, and the like have variations in shape within a tolerance range. In addition, the damper and the casing individually expand and contract due to a temperature change around the air conditioner. Therefore, even if the damper is operated until it is in the closed state, the state in which the closed portion is in close contact with the contact portion of the casing cannot be maintained, and a case where sealing performance cannot be obtained may occur. In this case, air leaks and passenger comfort is impaired. In addition, due to the influence of the weight of the damper, the closing portion may be displaced away from the casing contact portion, and the sealing performance may not be obtained.

  In order to avoid these things, it is conceivable to increase the operating force of the damper so that the closing part is strongly pressed against the contact part of the casing under any circumstances. There is a risk that deformation will occur in each part.

  The present invention has been made in view of the above points, and the object of the present invention is that when the air flow path is closed by a damper, variation of each part during manufacturing, deformation of each part due to temperature change, and the like occur. However, it is to be able to stably obtain the sealing performance of the damper without increasing the operating force so much.

  In order to solve the above-described problem, in the present invention, a flexible portion that can be elastically deformed is provided in the damper, and the closing portion of the damper is pressed against the contact portion of the casing by using the elastic force of the flexible portion. .

  1st invention is equipped with the casing which has an air flow path, and the damper which is arrange | positioned at the said casing and has a closing part for opening and closing the said air flow path, The said closed part is an air flow path in the said casing An air conditioner for a vehicle configured to close the air flow path in a state in which a gap between the closing portion and the casing is sealed by being brought into contact with a contact portion provided around the damper, A flexible portion that is elastically deformable provided continuously to the closing portion, and the casing is a closing portion that engages with the flexible portion of the damper when the damper is in the closing position of the air flow path. A position engaging part is provided, and the closing position engaging part is positioned so as to press the closing part against the contact part by the elastic force of the flexible part when the flexible part is in an engaged state. It is characterized by being It is intended.

  According to this configuration, when the damper is in the closed position of the air flow path, the flexible portion of the damper is engaged with the closed position engaging portion of the casing, and the closed portion of the damper is engaged with the casing by the elastic force of the flexible portion. It is pressed against the contact part. As a result, even if the damper or casing has a variation in shape or thermal expansion or contraction of the damper or casing occurs, the closing portion can be brought into close contact with the contact portion, and the sealing performance of the damper is ensured. The Further, even when the weight of the damper affects the direction away from the contact portion, the damper is prevented from moving away from the contact portion by pressing the closing portion of the damper against the contact portion. , Sealability is ensured.

  A second invention is characterized in that, in the first invention, the casing is provided with an intermediate position engaging portion that engages with the flexible portion of the damper when the damper is in the middle of the operating range. To do.

  That is, when the damper is in the middle of the operating range, since the closing portion is not in contact with the contact portion of the casing, it is not supported by the casing and is likely to vibrate due to the influence of the air flow in the air flow path, In the present invention, the closing portion of the damper in such a state is engaged with the midway position engaging portion, so that the closing portion is supported by the casing and vibration of the closing portion is suppressed.

  According to a third invention, in the first or second invention, the damper has a support shaft that rotatably supports the closing portion, and the closing portion extends in a radial direction from the outer peripheral surface of the support shaft. The flexible part is formed so as to extend along the protruding end of the closing part in the protruding direction.

  According to this configuration, since the flexible portion is provided in a wide range of the front end portion of the closing portion, it is possible to stably press the wide range of the closing portion against the contact portion of the casing.

  According to a fourth invention, in any one of the first to third inventions, the closing portion of the damper is provided with a seal portion made of an elastic material that comes into contact with the contact portion of the casing. The seal portion is positioned so as to abut against the abutment portion and compressively deform.

  According to this configuration, it is possible to reliably obtain the sealing performance by the seal portion of the damper.

  According to a fifth invention, in any one of the first to fourth inventions, the flexible part has a contact part that contacts the closing position engaging part, and the contact part is configured by a curved surface. It is characterized by.

  According to this configuration, when the flexible portion is engaged with the closing position engaging portion, the contact portion is a curved surface, so that the contacting portion is smoothly and smoothly engaged with the closing position engaging portion. To come.

  According to a sixth invention, in any one of the first to fifth inventions, the closing position engaging portion of the damper is constituted by a rib formed on the inner surface of the casing.

  According to this configuration, the casing can be reinforced by using the closing position engaging portion.

  According to the first aspect of the invention, the damper is provided with a flexible portion that can be elastically deformed, and when the damper is in the closed position, the flexible portion is engaged with the closed position engaging portion of the casing, and the flexible portion is elastic. Because the damper's closing part is pressed against the abutting part of the casing by force, even if there is variation in each part during manufacturing or deformation of each part due to temperature change, etc., without increasing the operation force of the damper so much, It is possible to stably obtain the sealability of the damper by bringing the closing portion of the damper into contact with the contact portion of the casing.

  According to the second aspect of the invention, since the casing is provided with an intermediate position engaging portion that engages with the flexible portion of the damper when the damper is in the middle of the operating range, the closing portion of the damper is the air in the air flow path. It is possible to suppress vibrations caused by the flow of noise, and to reduce the occurrence of abnormal noise.

  According to the third invention, the closing portion of the damper is formed in a plate shape, and the flexible portion is provided so as to extend along the distal end portion of the closing portion. The sealing property can be enhanced.

  According to the fourth aspect of the invention, the seal portion made of an elastic material is provided at the closing portion of the damper, and the seal portion is brought into contact with the contact portion of the casing in a state of being compressed and deformed. Can get to.

  According to the fifth invention, the flexible portion has the contact portion that contacts the closing position engaging portion, and the contact portion is configured by a curved surface, so that the damper can be operated smoothly and the operability can be improved. .

  According to the sixth aspect, since the closing position engaging portion is constituted by the rib formed on the inner surface of the casing, the casing can be reinforced using the closing position engaging portion.

It is the figure which looked at the air conditioner for vehicles from the rear side. It is a longitudinal cross-sectional view which shows the internal structure of an air conditioning unit. It is a perspective view of the 1st blowing direction switching damper which abbreviate | omitted the sealing member. It is an expansion perspective view of the front end side of the 1st blowing direction switching damper. It is an enlarged view of the 1st blowing direction switching damper vicinity of the air-conditioning unit in the state which closed the center vent outlet and the side vent outlet. FIG. 6 is a view corresponding to FIG. 5 with the center vent outlet and the side vent outlet opened. FIG. 3 is a diagram corresponding to FIG. 2 according to a modification. FIG. 9 is a diagram corresponding to FIG. 3 according to a modified example.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature and is not intended to limit the present invention, its application, or its use.

  FIG. 1 is a view of a vehicle air conditioner 1 according to an embodiment of the present invention as seen from the rear side of the vehicle. The vehicle in which the air conditioner 1 is disposed is a so-called right-hand drive vehicle in which a driver seat and a passenger seat are provided on the right side and the left side of the vehicle, respectively. In the description of this embodiment, for convenience of explanation, the left side in the vehicle width direction is simply referred to as “left”, the right side in the vehicle width direction is simply referred to as “right”, and the front side of the vehicle is simply referred to as “front”. The rear side of the vehicle is simply referred to as “rear”.

  The air conditioner 1 includes a blower unit 3 that blows air for air conditioning, an air conditioner unit 4 that introduces air blown from the blower unit 3 into conditioned air, and a blower unit 3 that blows air to the air conditioner unit 4. And an intermediate duct 5 for sending air for air conditioning.

  The air-conditioning unit 4 is disposed at a substantially central portion in the left-right direction in an instrument panel (not shown) of the passenger compartment, while the air-blowing unit 3 is separated to the left side with respect to the air-conditioning unit 4 and installed in the passenger seat. It is arranged in the front.

  The blower unit 3 includes a casing 6 that houses a fan 23 as an air conditioning device. The upper portion of the seeding 6 is an air intake portion 7 for taking in air for air conditioning into the blower unit 3, while the lower portion is a blower for blowing the taken air into the air conditioning unit 4. Part 8. A portion of the casing 6 between the air intake portion 7 and the blower portion 8 is a filter housing portion 21 for housing the filter 20.

  An air flow path S extending from the air intake portion 7 to the blower portion 8 is provided in the casing 6, and air-conditioning air introduced from the air intake portion 7 flows through the air flow path S. .

  An air intake 10 for taking in air outside the passenger compartment is formed on the front side of the vehicle above the air intake portion 7, and an air intake 11 for taking in air in the passenger compartment is formed on the rear side of the vehicle. Yes. The outside air intake 10 and the inside air intake 11 constitute the upstream end of the air flow path S. The outside air inlet 10 and the inside air inlet 11 have substantially the same rectangular shape. The casing 6 is provided with a grid-like grill 14 that covers the inside air inlet 11.

  Inside / outside casing 6, an inside / outside air switching damper 12 is arranged. The inside / outside air switching damper 12 is configured to rotate in the direction in which the outside air inlet 10 and the inside air inlet 11 are arranged (front-rear direction) to selectively open and close the outside air inlet 10 and the inside air inlet 11. ing.

  A left end portion of a support shaft (not shown) of the inside / outside air switching damper 12 is rotatably supported by the left wall portion of the casing 6. Further, the right end portion of the support shaft of the inside / outside air switching damper 12 is rotatably supported by the right wall portion of the casing 6 and protrudes outward of the casing 6 from the right wall portion.

  On the right wall portion of the casing 6, an inside / outside air switching motor actuator 15 and an inside / outside air switching link 16 for rotating the inside / outside air switching damper 12 are disposed.

  When the operating force by the inside / outside air switching motor actuator 15 is transmitted to the inside / outside air switching damper 12 via the link 16, the inside / outside air switching damper 12 rotates around the support shaft. Thereby, it switches between the inside air introduction mode in which only the air in the vehicle interior is introduced into the air flow path S of the casing 6 and the outside air introduction mode in which only the air outside the vehicle interior is introduced.

  A centrifugal multiblade fan 23 is disposed in the blower unit 8 with its rotating shaft directed in the vertical direction. A motor M that rotates the fan 23 is attached to the lower wall portion of the blower 8.

  An air outflow path 29 in which air blown out from the fan 23 gathers is formed around the fan 23 in the blower unit 8. The air outflow path 29 constitutes a part of the air flow path S. Although not shown, the downstream end of the air outflow passage 29 is open on the right side wall of the blower 8, and the left end of the intermediate duct 5 is connected to the downstream end opening.

  Moreover, the casing 30 of the air conditioning unit 4 is long in the vertical direction as a whole, and is larger than the casing 6 of the blower unit 3. An inlet 25 (shown in phantom lines in FIG. 2) is formed in the left side wall of the casing 30, and the right end of the intermediate duct 8 is connected to the inlet 25.

  The introduction port 25 is formed in the lower part of the casing 30. An air flow path R extending from the inlet 25 to the upper part of the casing 30 is formed in the casing 30. The air flow path R includes a cooling passage 33, a heating passage 41, an air mix space 65, and an air guide passage 68.

  The cooling passage 33 extends to a substantially central portion in the vertical direction of the casing 30, and the air-conditioning air introduced from the inlet 25 changes its direction upward in the casing 30 and flows. An evaporator 34 as a cooling heat exchanger for cooling the air-conditioning air flowing through the cooling passage 33 is disposed in the middle of the cooling passage 33 in the vertical direction so as to cross the cooling passage 33. The evaporator 34 constitutes one element of the refrigeration cycle. A drain portion 35 for draining the condensed water generated by the evaporator 34 is provided on the bottom wall portion of the casing 30.

  An air flow downstream end of the cooling passage 33 is branched into two in the longitudinal direction of the vehicle. The downstream end on the front side of the cooling passage 33 is a front cold air outlet 37, and the downstream end on the rear side is a rear cold air outlet 38. A central partition 40 is provided between the front cold air outlet 37 and the rear cold air outlet 38 to divide the inside of the casing 30 into the cooling passage 33 and its upper space.

  An air flow upstream end of a heating passage 41 is connected to the front cold air outlet 37, and the heating passage 41 extends obliquely upward toward the rear side as a whole above the central partition wall 40. A heater core 43 serving as a heat exchanger for heating is disposed in the middle in the vertical direction of the heating passage 41 so as to cross the heating passage 41.

  Above the heater core 43, there is provided an upper partition wall 45 that divides the upper half of the casing 30 into the heating passage 41 and the space above it. Between the rear end portion of the upper partition wall 45 and the rear end portion of the central partition wall 40, a hot air outlet 46, which is the downstream end of the heating passage 41, opens toward the rear of the vehicle.

  In the vicinity of the front side cold air outlet 37 and the rear side cold air outlet 38 in the casing 30, there are a front temperature adjustment damper 48 and a rear side temperature that open and close the air outlets 37 and 38 according to the room temperature set by the passenger. An adjustment damper 49 is provided.

  The rear temperature control damper 49 is a so-called plate damper having a closing plate 51 for opening and closing the rear cold air outlet 38 and a support shaft 50 that rotatably supports the closing plate 51 with respect to the casing 30. Yes, it is an integrally molded product of resin material.

The support shaft 50 extends in the left-right direction. Both ends of the support shaft 50 are rotatably inserted into bearing holes (not shown) formed in the left and right side walls of the casing 30. Further, seal members 56 are respectively attached to the peripheral edge portions of the closing plate 51. The seal member 56 is a member constituting the rear temperature control damper 49, and is made of a foamed resin such as urethane foam. The seal member 56 may be configured by using an elastic material other than urethane foam. The front side temperature adjustment damper 48 includes a support shaft 58 and a pair of closing portions 59 extending on both radial sides of the support shaft 58. 59, a so-called butterfly damper that opens and closes the front cold air outlet 37. Similar sealing members 61 of the rear temperature control damper 49 are attached to the peripheral portions of the closing portions 59, 59, respectively.

  The front temperature adjustment damper 48 and the rear temperature adjustment damper 49 are driven by a temperature adjustment motor actuator 110 shown in FIG. The temperature adjustment motor actuator 110, the front temperature adjustment damper 48, and the rear temperature adjustment damper 49 are connected by a link 111.

  The air mix space 65 is provided above the rear cold air outlet 38 in the casing 30. The rear side cold air outlet 38 and the hot air outlet 46 are connected to the air mix space 65, and cold air and hot air respectively flow from the rear side cold air outlet 38 and the hot air outlet 46. . The cold air and the warm air flowing into the air mix space 65 are mixed in the air mix space 65 to become conditioned air.

  The air guide passage 68 communicates with the upper portion of the air mix space 65 and extends toward the rear side. A center vent outlet 66 and a side vent outlet 67 (shown in FIG. 1) constituting the downstream end of the air guide passage 68 are formed on the rear side of the upper wall portion of the casing 30. In addition, a defroster outlet 70 constituting a downstream end portion of the air guide passage 68 is also formed on the front side of the upper wall portion of the casing 30. An opening 69 that allows the air mix space 65 and the air guide passage 68 to communicate with each other is formed in the casing 30.

  Left and right foot outlets 73 constituting a part of the air guide passage 68 are formed in the upper part of the left side wall part and the right side wall part of the casing 30, respectively. The left and right foot outlets 73 are for guiding conditioned air to the feet of the passengers in the driver seat and the passenger seat. Further, in the casing 30, a foot space 71 that communicates with the left and right foot outlets 73 is formed, and an opening 72 that communicates the air guide passage 68 and the foot space 71 is formed.

  A first blowing direction switching damper 76 that opens and closes the center vent outlet 66 and the side vent outlet 67 at the same time is provided at the upper rear side in the casing 30. The first blowing direction switching damper 76 includes a closing plate (closing portion) 87 for opening and closing the center vent outlet 66 and the side vent outlet 67, and a support for rotatably supporting the closing portion 87 with respect to the casing 30. This is a so-called plate damper having a shaft 86, and is an integrally molded product of a resin material. The first blowing direction switching damper 76 rotates from a position (shown in FIG. 5) where the center vent outlet 66 and the side vent outlet 67 are closed (shown in FIG. 5) to a position where the opening 69 is closed (shown in FIG. 2). It has become. When the first blowing direction switching damper 76 is in a position to close the center vent outlet 66 and the side vent outlet 67, the opening 69 is opened, while when the opening 69 is in a position to close, the center vent guide The outlet 66 and the side vent outlet 67 are opened.

  The support shaft 86 extends in the left-right direction. Both ends of the support shaft 86 are rotatably inserted into bearing holes (not shown) formed in the left and right side walls of the casing 30.

  As shown in FIG. 3, the closing plate 87 is formed in a plate shape extending in a radial direction from the outer peripheral surface of the support shaft 86. Seal members 88 are respectively attached to the peripheral portions of both surfaces of the closing plate 87. The seal member 88 is a member that constitutes the first blowing direction switching damper 76, and is made of a foamed resin such as urethane foam. The seal member 88 may be configured using an elastic material other than urethane foam.

  The closing plate 87 is formed in a substantially rectangular shape that can close the center vent outlet 66 and the side vent outlet 67. A flexible portion 87 a made of an elastic material is provided at an end portion (tip portion) opposite to the support shaft 86 in the closing plate 87.

  The flexible portion 87 a has a rod shape extending in the axial direction of the support shaft 86 along the distal end portion of the closing plate 87. The flexible portion 87 a is continuous across the left and right ends of the closing plate 87.

  The flexible portion 87a is made of rubber or the like, for example. The flexible portion 87a may be formed integrally with the closing plate 87, or may be attached to the closing plate 87 after the flexible portion 87a is formed separately.

  The elastic force of the flexible portion 87a is such that the first blowing direction switching damper 76 closes the center vent outlet 66 and the side vent outlet 67, and the flexible portion 87a acts as a closing position engaging portion 89 (described later) of the casing 30. When engaged, the seal member 88 is set to such an extent that it can be brought into close contact with the inner surface of the casing 30 while being compressed and deformed.

  As shown in FIG. 4, the base end side (closing plate 87 side) of the flexible portion 87a is thinner than the distal end side of the flexible portion 87a. Specifically, one outer surface 87c on the proximal end side of the flexible portion 87a is curved in a direction approaching the other outer surface 87d, and the other outer surface 87d is also curved in a direction approaching one outer surface 87c. is doing. As a result, the flexible portion 87 a is bent and deformed in the thickness direction of the closing plate 87 with the distal end side as a starting point.

  The distal end side of the flexible portion 87a has a substantially arc-shaped cross section in a direction orthogonal to the longitudinal direction of the flexible portion 87a, and the outer surface (contact portion) 87e on the distal end side is formed of a curved surface. Yes. The thickness of the flexible portion 87a on the tip side is set to be approximately the same as the thickness of the closing plate 87.

  As shown in FIGS. 5 and 6, on the inner surface of the casing 30, protrusions (abutting portions) 30 a that protrude toward the inside of the casing 30 at the peripheral portions of the center vent outlet 66 and the side vent outlet 67. Is formed. The protrusion 30a extends continuously in the circumferential direction so as to surround the center vent outlet 66 and the side vent outlet 67.

  The seal member 88 of the first blowing direction switching damper 76 comes into contact with the protrusion 30a (see FIG. 5). When the seal member 88 abuts on the ridge 30a, the peripheral portions of the center vent outlet 66 and the side vent outlet 67 are sealed. The protruding portion 30a may be omitted, and in this case, the seal member 88 comes into contact with the flat surfaces (contact portions) of the peripheral portions of the center vent outlet port 66 and the side vent outlet port 67.

  A closing position engaging portion 89 with which the first blowing direction switching damper 76 is engaged is provided below the lower edge portions of the center vent outlet 66 and the side vent outlet 67 in the casing 30. When the first outlet direction switching damper 76 is in a position where the center vent outlet 66 and the side vent outlet 67 are closed, the flexible portion 87 a is engaged with the closing position engaging portion 89.

  The closing position engaging portion 89 is configured by a rib that protrudes from the inner surface of the casing 30 toward the inside of the casing 30. Thereby, the periphery of the center vent outlet 66 and the side vent outlet 67 of the casing 30 is reinforced and rigidity is increased.

  The closing position engaging portion 89 continuously extends in the same direction (left-right direction) as the extending direction of the flexible portion 87a of the first blowing direction switching damper 76. The left and right ends of the closing position engaging portion 89 are integrated with the inner surfaces of the left and right side walls of the casing 30.

  The base end side portion 89 a of the closing position engaging portion 89 protrudes in a direction substantially orthogonal to the inner surface of the casing 30. The distal end side portion 89b of the closing position engaging portion 89 protrudes in a direction inclined with respect to the proximal end side portion 89a, and is located on the upper side as it approaches the distal end of the distal end side portion 89b. As shown in FIG. 5, the flexible portion 87 a of the first blowing direction switching damper 76 is engaged with the upper surface of the distal end side portion 89 b of the closing position engaging portion 89.

  The distal end portion 89b pushes the first blowing direction switching damper 76 in the closing direction by the elastic force of the flexible portion 87a in a state where the flexible portion 87a of the first blowing direction switching damper 76 is engaged with the distal end portion 89b. It is positioned so that it can. The pressing force in the closing direction at this time is obtained by the elastic force of the flexible portion 87 a, that is, the force for returning to the original shape, and the seal member 88 is pressed against the protruding portion 30 a of the casing 30. The size is set so as to compress and deform.

  In addition, as shown in FIG. 6, a midway position engaging portion 90 that engages the flexible portion 87 a when the first blowing direction switching damper 76 is in the middle of the operating range is provided in the casing 30. . The midway position engaging portion 90 is formed in a plate shape extending continuously from the inner surface of the left side wall of the casing 30 to the inner surface of the right side wall, and is integrated with the casing 30. The midway position engaging portion 90 extends downwardly so as to be positioned downward as it goes to the front side, and the degree of this inclination is set so as to substantially follow the rotation trajectory of the first blowing direction switching damper 76. Yes.

  Further, the position of the midway position engaging portion 90 is set such that when the first blowing direction switching damper 76 is in the middle of rotation, the distal end side of the flexible portion 87a is pressed and the flexible portion 87a is bent and deformed. Has been. The first blowing direction switching damper 76 is engaged with the midway position engaging portion 90 in a state where the flexible portion 87a is pressed against the midway position engaging portion 90 and deformed.

  A bent portion 90 a extending in a direction away from the turning locus of the first blow direction switching damper 76 is formed on the upper portion of the midway position engaging portion 90. In addition, a bent portion 90b extending in a direction away from the rotation trajectory of the first blowing direction switching damper 76 is formed in the lower portion of the midway position engaging portion 90.

  A second blowing direction switching damper 77 that opens and closes the defroster outlet 70 and the opening 72 is provided on the upper front side in the casing 30. The second blowing direction switching damper 77 is configured in the same manner as the first blowing direction switching damper 76. That is, a support shaft 92 and a closing plate 93 are provided, and seal members 94 are attached to both surfaces of the closing plate 93, respectively. Further, the closing plate 93 includes a flexible portion 93a.

  Further, a closing position engaging portion 91 similar to the closing position engaging portion 89 is provided on the inner surface of the casing 30.

  The first and second blowing direction switching dampers 76 and 77 are driven by the blowing direction switching motor actuator 100 shown in FIG. The blowing direction switching motor actuator 100 and the first and second blowing direction switching dampers 76 and 77 are connected by a link 102.

  The first and second blowing direction switching dampers 76 and 77 open and close the center vent outlet 66, the side vent outlet 67, the defroster outlet 70, and the like according to the blowing mode such as the vent mode, the defroster mode, and the foot mode. Is to be switched. The left and right foot outlet 73 is opened and closed by another damper and actuator (not shown).

  Next, the flow of air in the air conditioner 1 configured as described above will be described. First, the air-conditioning air blown by the fan 23 of the blower unit 3 passes through the intermediate duct 5 from the inlet 25 to the air-conditioning unit 4. Is introduced into the casing 30.

  Subsequently, the air introduced into the casing 30 of the air conditioning unit 4 flows upward immediately after the introduction, passes through the evaporator 34, and is cooled by the evaporator 34 at this time. If the front temperature control damper 48 and the rear temperature control damper 49 are in the open state, a part of the cool air that has passed through the evaporator 34 flows into the heating passage 41 from the front cool air outlet 37 and the rest is the rear cool air blower. It flows into the air mix space 65 from the outlet 38.

  The cold air flowing into the heating passage 41 flows obliquely upward toward the rear side and passes through the heater core 43. At this time, the cold air is heated by the heater core 43 and warm air flows into the air mix space 65 from the warm air outlet 46.

  The flow rate ratio between the cold air and the warm air flowing into the air mix space 65 is determined by adjusting the opening degree of the front cold air outlet 37 by the front temperature adjustment damper 48 and opening the rear cold air outlet 38 by the rear temperature adjustment damper 49. It depends on the degree adjustment. By changing the flow rate ratio between the cold air and the hot air, the temperature of the conditioned air generated in the air mix space 65 can be changed.

  Further, when the occupant desires rapid cooling, as shown in FIG. 2, the occupant is switched to the full cold mode and the front temperature control damper 48 is rotated until the front cold air outlet 37 is fully closed. At the same time, the rear temperature adjustment damper 49 is rotated until the rear cold air outlet 38 is fully opened. As a result, only the cold air flows into the air mix space 65 from the rear cold air outlet 38.

  At the time of the full cold mode, the first blowing direction switching damper 76 is simultaneously rotated downward to open the vent outlets 66 and 67, and the second outlet direction switching damper 77 is rotated upward to fully open the defroster outlet 70. The foot lead-out port 73 is fully closed. As a result, the cold air that has flowed into the air mix space 65 from the rear cold air outlet 38 flows straight through the air mix space 65 and is led out from the center vent outlet 66 and the side vent outlet 67.

  In addition, when the occupant desires rapid heating, although not shown in the drawing, it is switched to the full hot mode and the front side temperature adjustment damper 48 is rotated until the front side cold air outlet 37 is fully opened. The temperature adjustment damper 49 is rotated until the rear cold air outlet 38 is fully closed. As a result, only warm air flows into the air mix space 65 from the warm air outlet 46.

  At the time of the full hot mode, as shown in FIG. 5, the first blowing direction switching damper 76 simultaneously rotates upward and the vent outlets 66 and 67 are fully closed, and although not shown, the second blowing direction switching damper 77 is By rotating downward, the defroster outlet 70 is fully opened. Thereby, the warm air flowing into the air mix space 65 from the warm air outlet 46 is led out from the defroster outlet 70. In the full hot mode, the position of the second blowing direction switching damper 77 may be changed so that part of the conditioned air is led out from the foot outlet 73.

  When the first blowing direction switching damper 76 is rotated upward, when it reaches the vicinity of the closing position, the flexible portion 87a comes into contact with the tip end portion 89b of the closing position engaging portion 89 from below and further approaches the closing position. The flexible portion 87a bends and gets over the distal end side portion 89b. When the flexible portion 87a gets over the distal end portion 89b, the flexible portion 87a comes into contact with and engages with the upper surface of the distal end portion 89b. At this time, since the outer surface 87e on the distal end side of the flexible portion 87a is curved, it does not get caught by the closing position engaging portion 89, and the leading end side of the flexible portion 87a is smooth to the closing position engaging portion 89. And smoothly engaged.

  As a result, the first blowing direction switching damper 76 is pushed in the closing direction so that the seal member 88 comes into contact with the protrusion 30a of the casing 30 in a compressed state, and the peripheral portions of the center vent outlet 66 and the side vent outlet 67 Is sealed.

  As described above, since the closing plate 87 of the first blowing direction switching damper 76 is pushed in the closing direction, even if the first blowing direction switching damper 76, the casing 30 and the like have variations in shape, sealing performance is ensured. . Further, even if the first blowing direction switching damper 76 or the casing 30 is expanded or contracted by heat, the expansion or contraction deformation can be absorbed, and the sealing performance is ensured. Furthermore, it is possible to prevent the damper 76 from moving in the opening direction due to the influence of the weight of the first blowing direction switching damper 76, and the sealing performance is ensured.

  When the second blowing direction switching damper 77 is also in the position for closing the defroster outlet 70, the flexible portion 93a engages with the closing position engaging portion 91. Therefore, as with the second blowing direction switching damper 76, The sealability of the defroster outlet 70 can be ensured.

  In the case of an intermediate blowing mode such as the bi-level mode, as shown in FIG. 6, the first blowing direction switching damper 76 is located in the middle of the operating range and engages with the middle position engaging portion 90. To do. Thereby, since the front end side of the closing plate 87 is supported by the midway position engaging part 90, it becomes possible to suppress that the 1st blowing direction switching damper 76 vibrates by the air flow etc. .

  As described above, according to this embodiment, the first blowing direction switching damper 76 is provided with the flexible portion 87a that can be elastically deformed, and the first blowing direction switching damper 76 has the center vent outlet 66 and the side vent outlet. The flexible portion 87a is engaged with the closing position engaging portion 89 of the casing 30 when the 67 is in the closing position, and the closing plate 87 of the first blowing direction switching damper 76 is closed by the elastic force of the flexible portion 87a. Since it is pushed in the direction, the sealing performance is stable without increasing the operating force of the first blowing direction switching damper 76 even if the parts are deformed during manufacturing or the parts are deformed due to temperature changes. Can be secured.

  Since the flexible portion 87a is engaged with the midway position engaging portion 90 of the casing 30 when the first blowing direction switching damper 76 is in the middle of the operating range, the first blowing direction switching damper 76 is It is possible to suppress vibration due to air flow or the like, and to reduce the generation of abnormal noise.

  In addition, since the flexible portion 87a is provided so as to extend along the front end portion of the closing plate 87 of the first blowing direction switching damper 76, the wide range of the closing plate 87 is reliably brought into contact with the ridge portion 30a of the casing 30. It is possible to improve the sealing performance.

  Further, since the first blowing direction switching damper 76 is provided with the seal member 88, and the seal member 88 is brought into contact with the protrusion 30a of the casing 30 in a compressed and deformed state, the sealing performance can be reliably obtained. Can do.

  Further, since the outer surface 87e on the distal end side of the flexible portion 87a is formed of a curved surface, the first blowing direction switching damper 76 can be operated smoothly, and the operability can be improved.

  Further, since the closing position engaging portion 89 is constituted by a rib formed on the inner surface of the casing 30, the casing 30 can be reinforced using the closing position engaging portion 89.

  In the above-described embodiment, the flexible portions 87a and 93b are provided only in the first blowing direction switching damper 76 and the second blowing direction switching damper 77. However, the present invention is not limited to this. For example, the modification shown in FIG. As described above, the rear side temperature adjustment damper 49 may be provided with the same flexible portion 51a. In this case, the casing 30 may be provided with a closing position engaging portion 120 with which the flexible portion 51a is engaged when the rear temperature adjustment damper 49 is in the closing position. In this modification, the flexible portion 87a of the first blowing direction switching damper 76 is omitted, but the flexible portion 93a of the second blowing direction switching damper 77 may be omitted.

  Further, in this modified example, as shown in FIG. 8, the flexible portions 59 a are provided on both the closing plates 59 and 59 of the front temperature control damper 48. In this case, the casing 30 may be provided with the closing position engaging portions 121 and 121 with which the flexible portions 59a are engaged.

  Further, the front temperature control damper 48, the rear temperature control damper 49, the first blowing direction switching damper 76, and the second blowing direction switching damper 77 may be manually operated by an occupant without being driven by the actuator 78. . In this case, although not shown, an operation lever is provided in the vehicle interior, the link connected to the support shafts 58, 50, 86, 92 of the dampers 48, 49, 76, 77 and the operation lever are connected by a wire, It is possible to operate the dampers 48, 49, 76, 77 by push-pull operation.

  Moreover, although the said embodiment demonstrated the case where this invention was applied to the semicenter type in which the air conditioner 1 is divided | segmented into the ventilation unit 3 and the air conditioning unit 4, it is not restricted to this, For example, the ventilation fan 23, The present invention can also be applied to a full center type in which the evaporator 34 and the heater core 43 are accommodated in one casing.

  As described above, the vehicle air conditioner according to the present invention is suitable for mounting in an automobile, for example.

DESCRIPTION OF SYMBOLS 1 Vehicle air conditioner 30 Casing 30a Projection part (contact part)
76 First blowing direction switching damper 86 Support shaft 87 Closing plate (closing portion)
87a flexible part 87e outer surface (contact part)
88 Seal member (seal part)
89 Closing position engaging portion 90 Intermediate position engaging portion

Claims (6)

A casing having an air flow path;
A damper disposed in the casing and having a closing portion for opening and closing the air flow path;
A vehicle configured to close the air flow path in a state where the gap between the closing part and the casing is sealed by bringing the closing part into contact with a contact part provided around the air flow path in the casing. Air conditioner for
The damper includes an elastically deformable flexible portion provided continuously to the closing portion,
The casing is provided with a closed position engaging portion that engages with a flexible portion of the damper when the damper is in the closed position of the air flow path,
The closing position engaging portion is positioned so as to press the closing portion against the contact portion by the elastic force of the flexible portion when the flexible portion is in an engaged state. Vehicle air conditioner. In the vehicle air conditioner according to claim 1,
The vehicle air conditioner characterized in that the casing is provided with an intermediate position engaging portion that engages with the flexible portion of the damper when the damper is in the middle of the operating range. The vehicle air conditioner according to claim 1 or 2,
The damper has a support shaft that rotatably supports the closing portion, and the closing portion is formed in a plate shape extending in a radial direction from the outer peripheral surface of the support shaft,
The vehicle air conditioner characterized in that the flexible portion is provided so as to extend along the front end portion in the protruding direction of the closing portion. In the vehicle air conditioner according to any one of claims 1 to 3,
The closing part of the damper is provided with a seal part made of an elastic material that comes into contact with the contact part of the casing,
The vehicle closing air-conditioning apparatus according to claim 1, wherein the closing position engaging portion is positioned such that the seal portion abuts on the abutting portion and is compressed and deformed. In the vehicle air conditioner according to any one of claims 1 to 4,
The flexible portion has a contact portion that contacts the closing position engaging portion,
The vehicle air conditioner characterized in that the contact portion is formed of a curved surface. In the vehicle air conditioner according to any one of claims 1 to 5,
The vehicular air conditioner characterized in that the closing position engaging portion of the damper is constituted by a rib formed on the inner surface of the casing.

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