JP4905389B2 - Inside / outside air switching device for vehicle air conditioner - Google Patents

Description

  The present invention relates to an inside / outside air switching device that switches between an air passage for introducing outside air in a vehicle and an air passage for introducing air inside the vehicle in a vehicle air conditioner.

  2. Description of the Related Art Conventionally, an inside / outside air switching device that is arranged at the most upstream part of an air flow among air passages of a vehicle air conditioner and switches between an air passage for introducing outside air (outside air) and an air passage for introducing inside air (inside air). It has been known.

  In general, this type of inside / outside air switching device includes door means having a door main body connected to a rotating shaft. Then, the air passage is switched by opening and closing the outside air introduction port for introducing the outside air into the air passage and the inside air introduction port for introducing the inside air by rotating the door means.

For example, in the inside / outside air switching device of Patent Documents 1 and 2, as a door means, a door main body portion that is disposed in a portion radially away from the rotating shaft and has an axial vertical cross section formed in a substantially arc shape, and A so-called rotary door is employed which has side plate portions arranged on both ends of the door main body in the rotational axis direction and connected to the rotational shaft.
JP 9-188124 A JP 2000-233628 A

  By the way, in this kind of inside / outside air switching device, the air passage is switched by rotationally displacing the door means, so it is necessary to secure a space for rotationally displacing the door means. Further, the inside / outside air switching device is disposed in a narrow space between a dash panel that partitions the engine room and the vehicle interior and an instrument panel (instrument panel) at the foremost portion of the vehicle interior.

  However, in the inside / outside air switching devices of Patent Documents 1 and 2, since the entire door means is accommodated in the inside, the physique as the whole inside / outside air switching device is made smaller than the space required for the door means to be rotationally displaced. I can't. For this reason, there is a problem that a mounting space for mounting the inside / outside air switching device on the vehicle increases, and the mounting property is poor.

  In view of the above points, an object of the present invention is to improve the mountability when mounting an inside / outside air switching device of a vehicle air conditioner on a vehicle.

In order to achieve the above object, according to the first aspect of the present invention, a case (12) in which an air passage is formed and an outside air introduction port (13) for introducing outside air into the passenger compartment is formed, and an outside air introduction port. a door means for opening and closing (13) (18, 38), outdoor air flowing in from the opening hole for air introduction formed dash panel (15) (16) that separates the e Njinrumu and vehicle interior, the outside air An inside / outside air switching device introduced into the case (12) from the introduction port (13) ,
Further, a packing material (17) disposed between the outside air introduction port (13) and the opening hole (16) to prevent air leakage between the outside air introduction port (13) and the opening hole (16) is provided. The door means (18, 38) includes a rotary shaft (18a, 38a) rotatably supported by the case (12), and a door main body portion that rotates integrally with the rotary shaft (18a, 38a) ( 18b, 38b), and the outer peripheral end portions (18e, 38e) of the door main body portions (18b, 38b) are provided when the door means (18, 38) closes the outside air introduction port (13). It is formed so that it may contact | abut to the opening edge part (13a) of (13), and at least one part of an opening edge part (13a) is a vehicle exterior air flow rather than the contact surface of a case (12) and packing material (17). It is formed in a shape protruding to the upstream side, the door means (18, 38 Moves from the position for closing the outside air inlet (13) to the position for opening, at least a part of the door body (18b, 38b) is more than the contact surface between the case (12) and the packing material (17). It is characterized by an inside / outside air switching device for a vehicle air conditioner that protrudes upstream of the air flow outside the passenger compartment .

  According to this, at least a part of the opening edge portion (13a) of the outside air introduction port (13) projects beyond the contact surface between the case (12) and the packing material (17) to the upstream side of the vehicle exterior air flow. Therefore, when the door means (18, 38) is rotationally displaced, the trajectory drawn by the outer peripheral ends (18e, 38e) of the main body (18b, 38b) moves outside the outer space of the case (12). Can be configured to pass.

  Therefore, a space for rotationally displacing the door means (18, 38) can be secured on the upstream side of the air flow outside the vehicle compartment from the contact surface between the case (12) and the packing material (17). Thereby, since the space which must be ensured inside the inside / outside air switching device in order to rotationally displace the door means (18, 38) can be reduced, the size of the whole inside / outside air switching device can be reduced in size. As a result, the mountability when the inside / outside air switching device is mounted on a vehicle can be improved.

  According to a second aspect of the present invention, in the inside / outside air switching device of the vehicle air conditioner according to the first aspect, at least a part of the opening edge (13a) flows from the opening hole (16) to the air flow outside the vehicle compartment. It is formed in the shape which protruded upstream. According to this, when the part which passes through the external space of the case (12) is increased in the locus drawn by the outer peripheral end portions (18e, 38e), the inside / outside air switching device is further mounted on the vehicle. Can be improved.

  According to a third aspect of the present invention, in the inside / outside air switching device of the vehicle air conditioner according to the first or second aspect, the door means (18, 38) is provided at the outer peripheral end of the door main body (18b, 38b). When the outside air introduction port (13) is closed, it is constituted by a sealing material (18e, 38e) that comes into contact with the opening edge portion (13a) of the outside air introduction port (13), and the opening edge portion of the outside air introduction port (13) ( 13a) is characterized in that a sheet surface (13b) against which the sealing material (18e, 38e) abuts when the door means (18, 38) closes the outside air inlet (13) is formed. .

  According to this, the sealing performance when the door means (18, 38) closes the outside air inlet (13) can be improved.

  According to a fourth aspect of the present invention, in the inside / outside air switching device for a vehicle air conditioner according to any one of the first to third aspects, the center line (C) of the rotating shaft (18a, 38a) and the outer peripheral end portion. The distance (L1) at both ends in the direction of the rotation axis (18a, 38a) among the distances between (18e, 38e) is formed shorter than the distance (L2) at the center in the direction of the rotation axis (18a, 38a). It is characterized by.

  According to this, when the door means (18, 38) is rotationally displaced, the door main body (18b, 38b) is located upstream of the air flow outside the vehicle compartment from the contact surface between the case (12) and the packing material (17). It is possible to prevent interference with other parts on the side.

  According to a fifth aspect of the present invention, in the inside / outside air switching device of the vehicle air conditioner according to the fourth aspect, the outside air of the vehicle interior is disposed downstream of the door means (18, 38) on the downstream side of the air flow outside the vehicle interior. The door means (18, 38) is arranged such that the distance from the center line (C) of the rotating shaft (18a, 38a) to the outer peripheral end (18e, 38e) It changes so that it may follow the shape of the inlet (22) of (21).

  According to this, among the distances from the center line (C) of the rotation shafts (18a, 38a) to the outer peripheral ends (18e, 38e) of the door body portions (18b, 38b), both ends of the rotation shafts (18a, 38a). Even if the distance (L1) in the part is shorter than the distance (L2) in the central part of the rotating shaft (18a), the suction resistance of the blower (21) is not increased.

  In order to suppress an increase in suction resistance, it is desirable that the outer peripheral ends (18e, 38e) of the door means (18, 38) be positioned on the outer peripheral side of the suction port (22). Even if a part of the outer peripheral ends (18e, 38e) of the door means (18, 38) is positioned on the inner peripheral side of the suction port (22) for convenience, the suction resistance of the blower (21) Will not increase significantly.

  Therefore, “changes along the shape of the suction port (22)” means that the outer peripheral end (18e, 38e) of the door means (18, 38) is aligned with the shape of the suction port (22). ) Is not only meant to be positioned on the outer peripheral side of the suction port (22), but also includes the case where it is positioned on the inner peripheral side of the suction port (22).

  According to a sixth aspect of the present invention, in the inside / outside air switching device of the vehicle air conditioner according to the fifth aspect, the suction port (22) is viewed from the direction of the rotation center axis (24a) of the blower (21). The center of the rotary shaft (18a, 38a) is overlapped with the center of rotation of the blower (21). It is arranged so that it may be arranged.

  According to this, since the suction port (22) opens to the object with respect to the center line (C) of the rotation shaft (18a, 38a), the door means (18, 38) becomes the outside air introduction port (13). The door means (18, 38) does not protrude from the suction port (22) and the suction resistance of the blower (21) is not increased in any case of fully closing and fully opening the fan. .

  Furthermore, in the inside / outside air switching device of the vehicle air conditioner according to claim 5 or 6 as in the invention described in claim 7, when viewed from the direction of the rotation center axis (24a) of the blower (21), The opening edge (13a) may be formed along the shape of the suction port (22) of the blower (21).

  Specifically, as in the eighth aspect of the invention, in the inside / outside air switching device of the vehicle air conditioner according to any one of the first to seventh aspects, the door main body (18b) has a rotating shaft. The outer peripheral door surface portion (18c) that is disposed in a radially outward direction from (18a) and extends along the rotational direction, and the outer peripheral door surface portion (18c) is disposed on both ends in the rotational axis (18a) direction. The side plate portion (18d) connected to the rotation shaft (18a) may be included. That is, the door means (18) may be a so-called rotary door.

  Further, as in the ninth aspect of the invention, in the inside / outside air switching device of the vehicle air conditioner according to any one of the first to seventh aspects, the door main body (38b) is formed in a plate shape. It may be. That is, the door means (38) may be a so-called cantilever door or a butterfly door.

  In addition, the code | symbol in the bracket | parenthesis of each means described in this column and the claim shows the correspondence with the specific means as described in embodiment mentioned later.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described. In this embodiment, the inside / outside air switching device of the present invention is applied to the blower unit 10 of the indoor unit in the vehicle air conditioner. As is well known, the indoor unit in the vehicle air conditioner includes a blower unit 10 that blows air blown into the vehicle interior and air conditioning unit that adjusts the temperature of the blown air from the blower unit 10. It is divided roughly into.

  The indoor unit is disposed in a space sandwiched between a dash panel 15 that partitions the engine room and the vehicle interior and an instrument panel (instrument panel) in the foremost portion of the vehicle interior. In the present embodiment, in this space, the air conditioning unit is disposed at a substantially central portion in the vehicle width direction, and the blower unit 10 is disposed offset from the central portion toward the passenger seat.

  Inside the air conditioning unit, an air passage is formed through which the vehicle interior blown air blown from the blower unit 10 flows. In this air passage, a cooling heat exchanger for cooling the air blown into the passenger compartment, a heating heat exchanger for reheating the cold air cooled by the cooling heat exchanger, and a heating heat exchanger are used. An air mix door or the like for adjusting the amount of cold air to be heated is disposed.

  The cooling heat exchanger of the present embodiment is arranged on the upstream side of the air flow of the air passage of the air conditioning unit, and is configured by a well-known vapor compression refrigeration cycle evaporator. Moreover, the heat exchanger for heating is arrange | positioned in the air flow downstream of an evaporator, and is comprised by the heater core which heats vehicle interior blowing air by using engine cooling water as a heat source.

  Further, the air mix door is disposed between the evaporator and the heater core, and by continuously changing the opening degree, the air volume and the heater core that pass through the heater core out of the cold air cooled by the evaporator are controlled. It is a temperature adjusting means for adjusting the temperature of the air blown into the passenger compartment by continuously changing the air volume ratio with the air volume to be bypassed.

  The temperature-adjusted vehicle interior blown air is supplied from the face outlet to the occupant's face through the openings formed in the most downstream part of the air flow of the air conditioning unit and the ducts connected to the openings. The air is blown from the foot outlet to the lower part of the occupant's foot and from the defroster outlet to the front window glass of the vehicle.

  Next, the detailed structure of the blower unit 10 of the present embodiment will be described with reference to FIGS. FIG. 1 is a cross-sectional view of the blower unit 10, and FIG. 2 is an enlarged view of the area around the outside air inlet 13 of the blower unit 10 and the outside air door 18 as viewed from the direction of arrow A. Accordingly, FIG. 1 corresponds to the BB cross-sectional view of FIG. Furthermore, the up / down, left / right, and front / rear arrows in each figure indicate directions of the blower unit 10 in a vehicle-mounted state.

  As shown in FIG. 1, the blower unit 10 of the present embodiment is configured integrally with an inside / outside air switching device 11 disposed above and an electric blower 21 disposed below the inside / outside air switching device 11. Is.

  The inside / outside air switching device 11 has a case 12 that forms an outer shell of the inside / outside air switching device 11. The case 12 is formed of a resin (for example, polypropylene) having a certain degree of elasticity and excellent in strength. Further, the case 12 is formed with an outside air introduction port 13 for introducing the vehicle interior outside air (outside air) into the case 12 and a room air introduction port 14 for introducing the vehicle interior air (inside air) into the case 12.

  Further, the outside air introduction port 13 is arranged so as to overlap with an opening hole 16 for introducing outside air formed in the dash panel 15. Therefore, the outside air introduced into the case 12 from the outside air inlet 13 becomes the outside air that flows in from the opening hole 16.

  A packing material 17 is disposed between the outside air introduction port 13 and the opening hole 16 of the dash panel 15 along the entire shape of the outside air introduction port 13 and the opening hole 16. This packing material is formed of a urethane packing material and prevents air leakage from between the outside air inlet 13 and the opening hole 16.

  Further, in the opening edge portion 13 a of the outside air inlet 13, a portion on the central portion side of the rotating shaft 18 a of the outside air door 18 to be described later is located on the upstream side of the air flow outside the vehicle compartment from the contact surface between the case 12 and the packing material 17. It is formed in a protruding shape. Further, the central portion side portion of the opening edge portion 13a protrudes from the opening hole 16 to the upstream side of the air flow outside the passenger compartment.

  An air passage that guides the outside air introduced from the outside air introduction port 13 and the inside air introduced from the inside air introduction port 14 to the blower 21 is formed inside the case 12. Further, an outside air door 18 that is a door means for opening and closing the outside air inlet 13 and an inside air door 19 that is a door means for opening and closing the inside air inlet 14 are disposed in the air passage.

  The outside air door 18 is formed of the same material as the case 12, and includes a rotation shaft 18a that is rotatably supported by the case 12, and a door body 18b that rotates integrally with the rotation shaft 18a. .

  More specifically, the door main body portion 18b is disposed at a portion away from the rotation shaft 18a in the radially outward direction, and has an outer peripheral door surface portion 18c that extends in a substantially circular arc shape along the rotation direction, and an outer peripheral door surface portion 18c. The side plate portions 18d are arranged on both ends of the rotary shaft 18a in the direction and connected to the rotary shaft 18a. That is, the outside air door 18 is a so-called rotary door.

  In addition, the outer air door 18 is formed at the outer peripheral end of the outside air door 18 so as to come into contact with the seat surface 13b formed at the opening edge portion 13a of the outside air inlet 13 when the outside air door 18 closes the outside air inlet 13. A sealing material 18e is provided.

  The sealing material 18e is formed of a thermoplastic elastomer that is an elastic material, and when the outside air door 18 closes the outside air inlet 13, the so-called lip seal type seal that contacts the seat surface 13b while being elastically deformed. It is a material. The thermoplastic elastomer is a material that exhibits rubber elasticity at room temperature, melts and exhibits fluidity when heated at high temperatures, and can be injection-molded in the same manner as a thermoplastic resin.

  Further, as shown in FIG. 2, the outside air door 18 has a distance L1 at both ends of the rotary shaft 18a among the distance from the center line C of the rotary shaft 18a to the tip of the sealing material 18e. It is shorter than L2. In other words, the outside air door 18 is formed in a shape (rugby ball shape) in which the center side swells radially outward from both end portions in the direction of the rotation shaft 18a.

  Thereby, the distance from the center line C of the rotating shaft 18a to the tip of the sealing material 18e is changed along the circular suction port 22 formed in the blower 21. In the present embodiment, as shown in FIG. 2, a portion where the distance L2 from the center line C to the tip of the sealing material 18e is constant is provided on the central portion side of the rotating shaft 18a. The distance from the center line C to the tip of the sealing material 18e may be continuously changed in an arc shape or a curved shape.

  And also about the opening edge part 13a of the external air introduction port 13, when the distance from the center line C of the rotating shaft 18a to the seat surface 13b closes the external air introduction port 13 by the external air door 18, the sealing material of the external air door 18 is used. 18e is formed so as to follow the shape of the suction port 22 of the blower 21 so that it can contact the seat surface 13b. Therefore, the opening edge portion 13a changes so that the central side of the rotation shaft 18a swells in the radially outward direction when viewed from the direction of the rotation center shaft 24a of the blower 21.

  In FIG. 2, the outside air door 18 shows a state where the outside air inlet 13 is closed, and the inlet 22 of the blower 21 is indicated by a broken line. Details of the arrangement relationship between the outside air door 18 and the suction port 22 of the blower 21 will be described later. Further, as described above, since the blower unit 10 of the present embodiment is disposed offset from the center in the vehicle width direction toward the passenger seat, the packing material 17 is completely rectangular so as to conform to the shape of the dash panel 15. The shape is slightly deformed.

  On the other hand, the inside air door 19 is formed of the same material as the case 12, and is provided with a rotary shaft 19a rotatably supported by the case 12, and a plate-like door main body 19b having a rotary shaft 17a connected to one end thereof. It has a so-called cantilever door.

  The rotating shaft 18a of the outside air door 18 and the rotating shaft 19a of the inside air door 19 are connected to a driving servomotor via a link mechanism (not shown). The operation of this servo motor is controlled by a control signal output from an air conditioning control device (not shown).

  Next, the blower 21 will be described. The blower 21 is an electric blower that rotationally drives a centrifugal multiblade fan 23 (sirocco fan) in which a plurality of blades 23 a having an arcuate cross-sectional shape are arranged in an annular shape by an electric motor 24. Note that the rotation speed of the electric motor 24 is controlled by a control voltage output from the air conditioning control device.

  The centrifugal multiblade fan 23 is accommodated in a spiral scroll casing 25 in which a suction port 22 for sucking air flowing into the inside / outside air switching device 11 is formed on one end side of the electric motor 24 in the direction of the rotation center shaft 24a. ing. Therefore, in the blower 21 of the present embodiment, the air sucked from the direction of the rotation center shaft 24 a of the electric motor 24 is blown out in the radially outward direction of the centrifugal multiblade fan 23.

  The suction port 22 is formed in a circular shape centered on the position of the rotation center of the blower 21 when viewed from the direction of the rotation center axis 24 a of the blower 21. Furthermore, the opening of the suction port 22 is formed in a bell mouth shape.

  Here, the details of the positional relationship between the suction port 22 and the outside air door 18 will be described. In this embodiment, when viewed from the direction of the rotation center axis 24a of the blower 21 (specifically, the centrifugal multiblade fan 23), the center line C of the rotation axis 18a of the outside door 18 is the rotation center of the blower 21. It is arranged to overlap. Therefore, the suction port 22 is open to the object with respect to the center line C of the rotating shaft 18a.

  Furthermore, as described above, since the outside air door 18 is formed in a shape in which the center side swells radially outward from both ends in the direction of the rotation shaft 18a, when the outside air door 18 fully opens the outside air inlet 13, The sealing material 18e on the side close to the suction port 22 of the blower 21 also changes along the suction port 22. Therefore, when the door means 18 fully closes the outside air introduction port 13 or when the door means 18 fully opens, the door means 18 does not protrude to the suction port 22.

  The scroll casing 25 is configured to be split into two divided members (specifically, an upper casing member 25a and a lower casing member 25b) in the vertical direction. Among these, the upper casing member 25 a also serves as the bottom surface side of the case 12 of the inside / outside air switching device 11.

  On the other hand, a mounting hole 26 for mounting the electric motor 24 is formed on the surface of the lower casing 25b opposite to the surface provided with the suction port 22, and a metal or resin bracket 27 is formed in the mounting hole 26. The electric motor 24 is fixed via the.

  The upper casing member 25a and the lower casing member 25b are made of the same material as the case 12, and in the state in which the centrifugal multiblade fan 23 is accommodated, together with the case 12, fastening means such as metal springs and clips, Alternatively, they are joined together by a joining means such as welding or adhesion.

  Next, the operation of this embodiment in the above configuration will be described with reference to FIGS. FIG. 3 is an external perspective view of the blower unit 10 showing a state of the inside air mode in which the air conditioning control device introduces the inside air into the indoor unit, and FIG. 4 shows the air conditioning control device that introduces the outside air into the indoor unit. It is an external appearance perspective view of the air blower unit 10 which shows the state of external air mode.

  When the air conditioning control device executes the control of the inside air mode in the operating state of the vehicle air conditioner, the outside air door 18 is placed on the rear side of the vehicle as shown in the solid line of FIG. 1 and FIG. In FIG. 1, a control signal for rotating the inside air door 19 to the vehicle rear side as shown by the solid line in FIG. Thereby, the outside air door 18 closes the outside air introduction port 13, and the inside air door 19 opens the inside air introduction port 14.

  On the other hand, when the air conditioning control device executes control in the outside air mode for introducing outside air into the indoor unit, the outside door 18 is connected to the servo motor with respect to the vehicle as shown in the two-dot chain line in FIG. 1 and FIG. At the same time as rotating in the forward direction (counterclockwise in FIG. 1), a control signal for rotating the inside air door 19 toward the front side of the vehicle as indicated by a two-dot chain line in FIG. As a result, the outside air door 18 opens the outside air introduction port 13, and the inside air door 19 closes the inside air introduction port 14.

  At this time, in the present embodiment, in the opening edge portion 13 a of the outside air inlet 13, the portion on the center side of the rotating shaft 18 a of the outside air door 18 is outside the vehicle compartment rather than the contact surface between the case 12 and the packing material 17. It is formed in a shape protruding to the upstream side of the flow, and protrudes from the opening hole 16 of the dash panel 15 to the upstream side of the air flow outside the vehicle compartment. Therefore, the locus drawn when the outer peripheral end 18 e of the outside air door 18 is rotationally displaced passes through the upstream side of the passenger compartment air flow from the opening hole 16.

  This will be described in detail with reference to FIG. FIG. 7 is a cross-sectional view of a conventional blower unit 11 and corresponds to FIG. 1 of the present embodiment. In FIG. 7, the same or equivalent parts as in the first embodiment are denoted by the same reference numerals. The same applies to the following drawings.

  When the opening edge 13a of the outside air inlet 13 does not protrude from the opening 16 of the dash panel 15 to the upstream side of the passenger compartment air flow as in the prior art, the outer peripheral end 18e of the outside air door 18 is rotationally displaced. All the trajectories drawn at this time pass through the internal space of the inside / outside air switching device 11.

  Therefore, all of the space for rotationally displacing the outside air door 18 must be secured on the downstream side of the air flow from the outside air introduction port 13, that is, inside the inside / outside air switching device 11. On the other hand, in this embodiment, a space for rotationally displacing the outside air door 18 can be secured on the upstream side of the air flow outside the vehicle compartment from the opening hole 16 of the dash panel 15.

  Accordingly, since the space that must be secured in the blower unit 10 (specifically, the inside / outside air switching device 11) in order to rotationally displace the outside air door 18 can be reduced, the outer periphery of the case 12 indicated by a broken line in FIG. Like the unit, the physique of the inside / outside air switching device 11 as a whole can be reduced in size. As a result, the mountability when the inside / outside air switching device 11 is mounted on a vehicle can be improved.

  Furthermore, since the packing material 17 is disposed between the outside air introduction port 13 of the blower unit 10 and the opening hole 16 of the dash panel 15, no air leakage occurs between the outside air introduction port 13 and the opening hole 16. . Further, when the outside air door 18 closes the outside air introduction port 13, the sealing material 18 e of the outside air door 18 abuts against the seat surface 13 b of the opening edge portion 13 a of the outside air introduction port 13, and therefore the outside air door 18 and the outside air introduction port. 13 can be improved.

  Further, since the opening edge 13a of the outside air door 18 and the outside air introduction port 13 is formed in a shape in which the central portion in the direction of the rotation shaft 18a is expanded radially outward, the dash is applied when the outside door 18 is rotationally displaced. The part that can move on the upstream side of the air flow outside the vehicle compartment from the opening hole 16 of the panel 15 can be only the central portion side of the rotary shaft 18a. Accordingly, it is possible to prevent the outside air door 18 from unnecessarily interfering with other components on the upstream side of the air flow outside the vehicle compartment from the opening hole 16.

  Furthermore, while changing the distance from the centerline C of the rotating shaft 18a to the front-end | tip of the sealing material 18e among the outside air doors 18 along the shape of the inlet 22 of the air blower 21, the outside air door 18 is made into the rotation shaft 18a. Since the center line C is arranged so as to overlap the rotation center of the blower 21, when the outside air inlet 13 is closed, the outside air inlet 13 can be reliably sealed, and when the outside air inlet 13 is opened. The suction resistance of the blower 21 is not increased.

(Second Embodiment)
In the first embodiment, the example in which the inside air door 19 that opens and closes the inside air inlet 14 is described. However, in this embodiment, an example in which the inside air door 19 is abolished will be described as shown in FIG. FIG. 5 is a cross-sectional view of the blower unit 11 of the present embodiment and corresponds to FIG. 1 of the first embodiment.

  As shown in FIG. 5, in the present embodiment, a sheet surface 14 a is formed at the opening edge of the inside air inlet 14 formed in the case 12. When the outside air door 18 opens the outside air introduction port 13, the seat surface 15 a comes into contact with the sealing material 18 e of the outside air door 18 while being elastically deformed. Other configurations and operations are the same as those in the first embodiment.

  Therefore, also in the air blower unit 11 of this embodiment, the effect similar to 1st Embodiment can be acquired. Furthermore, since it becomes easy to enlarge the opening area of the inside air introduction port 14, the suction resistance of the blower 21 in the inside air mode can be further reduced.

(Third embodiment)
In the first embodiment, an example in which a rotary door is adopted as the outside air door 18 has been described. However, in the present embodiment, as shown in FIG. 6, the door main body portion 38 b is formed in a plate shape, and the door main body portion. An outside air door 38 configured as a so-called butterfly door in which a rotary shaft 38a is connected to a substantially central portion of 38b is employed.

  Similarly to the first embodiment, when the outside air door 38 closes the outside air introduction port 13 on the outer peripheral end portion of the outside air door 38, the seat surface 13b formed on the opening edge 13a of the outside air introduction port 13 is also provided. A sealing material 38e formed so as to abut is provided. Other configurations are the same as those of the first embodiment.

  Even if the outside air door 38 configured by a butterfly door is employed as in the present embodiment, the outside air door 18 and the inside air door 19 are rotated as shown by the solid line in FIG. 6 in the inside air mode, and FIG. By rotating as indicated by the two-dot chain line, the same effect as in the first embodiment can be obtained.

(Other embodiments)
The present invention is not limited to the above-described embodiment, and can be variously modified as follows.

  (1) In each above-mentioned embodiment, although the example which employ | adopted the urethane packing material as the packing material 17 was demonstrated, the material of a packing material is not limited to this. For example, rubber materials such as natural rubber and synthetic rubber may be employed. That is, as the packing material, it is possible to adopt a material that can prevent air leakage by being in close contact with the open air inlet 13 and the opening edge of the opening hole 16 while being elastically deformed.

  (2) In each of the above-described embodiments, the example in which the lip seal type seal material is employed as the seal materials 18e and 38e of the outside air doors 18 and 38 has been described, but the seal material is not limited thereto. For example, you may employ | adopt the seal material of the packing seal type affixed on the outer peripheral edge part of the outside door 18 in the strip | belt shape. In addition, as a material of this packing seal type sealing material, the same thing as said packing material 17 can be used.

  (3) In each of the above-described embodiments, the air conditioning unit is disposed in a substantially central portion in the vehicle width direction, and the vehicle includes a semi-centered indoor unit in which the blower unit 10 is disposed offset from the central portion toward the passenger seat. Although the air conditioner has been described, the inside / outside air switching device of the present invention may be applied to an indoor unit with a complete center arrangement in which the air conditioning unit and the blower unit are integrated and arranged at a substantially central portion in the vehicle width direction. In this case, the air introduced from the inside / outside air switching device of the present invention may be guided to the suction port of the blower.

  (4) In the blower unit 10 of each embodiment described above, an air filter that removes dust and the like in the air may be provided between the inside / outside air switching device 11 and the blower 21. Moreover, although the above-mentioned embodiment demonstrated the example which comprised the inside air door 19 by the cantilever door, you may employ | adopt a rotary door, a butterfly door, etc. as the inside air door 19. FIG.

It is sectional drawing of the air blower unit of 1st Embodiment. It is an enlarged A arrow view of FIG. It is an external appearance perspective view in inside air mode of the blower unit of a 1st embodiment. It is an external appearance perspective view in the external air mode of the air blower unit of 1st Embodiment. It is sectional drawing of the air blower unit of 2nd Embodiment. It is sectional drawing of the air blower unit of 3rd Embodiment. It is sectional drawing of the air blower unit of a prior art.

Explanation of symbols

12 Case 13 Outside air inlet 13a Open edge 13b Seat surface 15 Dash panel 16 Open hole 17 Packing material 18, 38 Outside door 18a, 38a Rotating shaft 18b, 38b Door body 18e, 38e Sealing material 21 Blower 22 Inlet 24a Rotation Central axis

Claims (9)

A case (12) in which an air passage is formed and an outside air introduction port (13) for introducing outside air into the vehicle interior is formed;
Door means (18, 38) for opening and closing the outside air inlet (13),
Et Njinrumu the outside air flowing from the opening hole (16) in the cabin and ambient air introducing formed dash panel (15) for partitioning the is introduced into the casing (12) from the outside air introduction port (13) An inside / outside air switching device,
Further, the packing material is disposed between the outside air introduction port (13) and the opening hole (16), and prevents air leakage from between the outside air introduction port (13) and the opening hole (16). (17)
The door means (18, 38) includes a rotating shaft (18a, 38a) rotatably supported by the case (12), and a door main body that rotates integrally with the rotating shaft (18a, 38a). (18b, 38b)
The outer peripheral end portions (18e, 38e) of the door main body portion (18b, 38b) are formed on the outside air introduction port (13) when the door means (18, 38) closes the outside air introduction port (13). Formed to contact the opening edge (13a),
At least a part of the opening edge (13a) is formed in a shape protruding to the upstream side of the air flow outside the vehicle compartment from the contact surface between the case (12) and the packing material (17) ,
When the door means (18, 38) moves from a position for closing the outside air inlet (13) to a position for opening, at least a part of the door body (18b, 38b) is connected to the case (12). An inside / outside air switching device for an air conditioner for a vehicle, wherein the inside / outside air switching device protrudes upstream of the air flow outside the vehicle compartment from the contact surface with the packing material (17) .   2. The vehicle air conditioner according to claim 1, wherein at least a part of the opening edge portion (13 a) is formed in a shape protruding from the opening hole (16) to the upstream side of the air flow outside the vehicle compartment. Inside / outside air switching device. When the door means (18, 38) closes the outside air inlet (13), the outer peripheral end of the door main body (18b, 38b) has an opening edge (13a) of the outside air inlet (13). ) And the sealing material (18e, 38e)
When the door means (18, 38) closes the outside air inlet (13), the sealing material (18e, 38e) contacts the opening edge (13a) of the outside air inlet (13). The inside / outside air switching device for a vehicle air conditioner according to claim 1 or 2, wherein a seat surface (13b) is formed.   Of the distance between the center line (C) of the rotating shaft (18a, 38a) and the outer peripheral end (18e, 38e), the distance (L1) at both ends in the rotating shaft (18a, 38a) direction is: The inside / outside air switching device for a vehicle air conditioner according to any one of Claims 1 to 3, wherein the inside / outside air switching device for the vehicle air conditioner is formed shorter than a distance (L2) at a central portion in the direction of the rotation axis (18a, 38a). . A blower (21) that blows air outside the vehicle interior toward the vehicle interior is disposed downstream of the door means (18, 38).
The door means (18, 38) is configured such that the distance from the center line (C) of the rotating shaft (18a, 38a) to the outer peripheral end (18e, 38e) is the suction port (22) of the blower (21). The inside / outside air switching device of the vehicle air conditioner according to claim 4, wherein the inside / outside air switching device changes according to the shape of the vehicle.   When viewed from the direction of the rotation center axis (24a) of the blower (21), the suction port (22) is formed in a circular shape so that its center overlaps the rotation center of the blower (21), Furthermore, the said rotating shaft (18a, 38a) is arrange | positioned so that the centerline (C) may overlap with the rotation center of the said air blower (21), The vehicle air conditioner of Claim 5 characterized by the above-mentioned. Inside / outside air switching device.   When viewed from the direction of the rotation center axis (24a) of the blower (21), the opening edge (13a) is formed so as to follow the shape of the suction port (22) of the blower (21). The inside / outside air switching device for a vehicle air conditioner according to claim 5 or 6.   The door main body portion (18b) is disposed at a position away from the rotation shaft (18a) in the radially outward direction, and extends along the rotation direction, and the outer peripheral door surface portion (18c). 8. The device according to claim 1, further comprising a side plate portion (18 d) disposed on both ends of the rotating shaft (18 a) in the direction and connected to the rotating shaft (18 a). The inside / outside air switching device for a vehicle air conditioner according to claim 1.   The said door main-body part (38b) is formed in plate shape, The inside-and-outside air switching apparatus of the vehicle air conditioner as described in any one of Claim 1 thru | or 7 characterized by the above-mentioned.

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