JP2008273234A - Air passage opening/closing door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air passage opening/closing door capable of effectively suppressing air leakage when an air passage is fully closed by suppressing the torsion of a rotary shaft. <P>SOLUTION: A thick-walled part 25e which is formed thicker than a door body 25a and extends parallel to the axes E of rotations of rotary shafts 25b, 25c of a defroster door 25 is provided at a door body 25a of a defroster door 25 as an air passage opening/closing door constituted as a cantilever type door. In addition, by arranging the center axis F of the thick-walled part 25e in a deviating manner from the axes E of rotation, the torsion of the rotary shafts 25b, 25c and the deformation of the door body 25a are suppressed, and air leakage when an air passage is fully closed is suppressed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an air passage opening / closing door that opens and closes an air passage, and is suitable for application to a mode switching door that switches a blowing mode in a vehicle air conditioner.

  Conventionally, Patent Document 1 discloses a mode switching door that is applied to an indoor air conditioning unit of a vehicle air conditioner and switches a blowing mode.

  In the mode switching door of Patent Document 1, the cross section of the door main body viewed from the direction of the rotation axis is formed into a wave shape, thereby increasing the rigidity of the door main body relative to the case where the cross section is formed on a straight line. The deformation of the door body is suppressed. As a result, when the air passage is fully closed, the occurrence of a gap between the seal portion on the outermost periphery of the mode switching door and the seat surface of the inner wall surface of the air passage is suppressed, and wind leakage from this gap is suppressed. ing.

The mode switching door is a defroster door that opens and closes the defroster ventilation path that guides the conditioned air toward the front window glass of the vehicle, a face door that opens and closes the face ventilation path that guides the conditioned air toward the upper body of the occupant, It is a collective term for foot doors that open and close the foot ventilation path that guides the conditioned air toward the feet.
JP 2004-114828 A

  However, even if the air passage is fully closed by the mode switching door of Patent Document 1, wind leakage may occur from the gap between the seal portion of the mode switching door and the seat surface of the air passage. Therefore, the present inventor investigated the cause, and found that this type of mode switching door was caused by opening / closing operation by transmitting the rotational driving force only to one end side of the rotating shaft portion.

  The reason is that if the driving force is transmitted only to one end side of the rotating shaft portion, the rotating shaft portion itself is twisted and deforms the door body unit integrally coupled to the rotating portion. . And even if the air passage is fully closed with the door main body deformed, a gap is generated between the seal portion of the mode switching door and the seat surface of the air passage, and wind leakage occurs from this gap. End up.

  As means for preventing such wind leakage, means for increasing the rigidity of the rotating shaft part, means for further increasing the rigidity of the door main body part, and the like can be considered. For example, in order to increase the rigidity of the rotating shaft part, When the diameter is increased or the thickness of the door main body is increased in order to further increase the rigidity of the door main body, the physique of the mode switching door as a whole increases and the mountability deteriorates.

  Further, if the wave shape of the cross section of the mode switching door of Patent Document 1 is made finer in order to further increase the rigidity of the door main body, molding becomes complicated, resulting in an increase in processing cost, or a door main body. However, the deterioration of the surface accuracy leads to deterioration of the sealing performance when fully closed.

  An object of this invention is to suppress the twist of a rotating shaft part in view of the said point, and to suppress effectively the wind leak at the time of fully closing an air path.

In order to achieve the above-mentioned object, the present invention is arranged in a case (11) that forms an air passage, and opens and closes the air passage, and a door (25a) to the case (11). An air passage that is formed so as to protrude toward the inner wall and is disposed at the outer peripheral end of the rotary shaft (25b, 25c) and rotatably supported by the case (11) and the door body (25a). An air passage opening / closing door comprising a seal portion (25d) that comes into contact with the seat surfaces (21a, 23a) formed on the inner wall surface of the case (11) while being elastically deformed when closed.
The door body portion (25a) is formed to be thicker than the plate thickness of the door body portion (25a) and to extend in parallel to the rotation axis (E) of the rotation shaft portions (25b, 25c). The air passage opening / closing door is provided with a thick wall portion (25e), and the rotation shaft (E) of the rotation shaft portion (25b, 25c) and the center axis (F) of the thick wall portion (25e) are deviated from each other. It is characterized by.

  According to this, since the rotating shaft (E) of the rotating shaft portion (25b, 25c) and the central axis (F) of the thick portion (25e) are shifted from each other, one end of the rotating shaft portion (25b, 25c). Even if the rotational driving force is transmitted to the side, the torsion of the rotating shaft portions (25b, 25c) can be suppressed by the thick portion (25e).

  Accordingly, the rotation shaft portions (25b, 25c) can be twisted without unnecessarily increasing the diameter of the rotation shaft portions (25b, 25c) or unnecessarily increasing the plate thickness of the door main body portion (25a). Can be suppressed. Further, the shape of the door main body (25a) is not unnecessarily complicated. As a result, twisting of the rotating shaft portions (25b, 25c) can be suppressed, and wind leakage when the air passage is fully closed can be effectively suppressed.

  The central axis (F) of the thick portion (25e) in the present invention is, for example, a representative of the thick portion (25e) in a cross section perpendicular to the rotation axis (E) of the rotation shaft portions (25b, 25c). When the cross-sectional shape is a substantially circular shape, it means a line passing through the center point, and when the representative cross-sectional shape of the thick portion (25e) in the cross-section is a polygon, its center of gravity Means a line passing through a point.

  In the air passage opening / closing door having the above characteristics, the rotation shaft (E) of the rotation shaft portion (25b, 25c) is disposed on one end side of the door body portion (25a), and further, the thick wall portion (25e). The center axis (F) may be disposed closer to the center of the door body (25a) than the rotation axis (E) of the rotation shafts (25b, 25c).

  In the air passage opening / closing door having the above characteristics, in the so-called cantilever door in which the rotation shaft (E) of the rotation shaft portion (25b, 25c) is disposed on one end side of the door body portion (25a), the thick wall portion (25e) Even if the central axis (F) is arranged closer to the center side of the door body (25a) than the rotational axis (E) of the rotary shaft (25b, 25c), The opening area of the air passage when the passage is fully opened does not decrease.

  Therefore, it is possible to suppress the twisting of the rotating shaft portions (25b, 25c) without reducing the opening area of the air passage.

  Further, in the air passage opening / closing door having the above-described features, thick-walled portion reinforcing ribs (25g, 25g ′) for increasing the rigidity of the thick-walled portion (25e) are formed on the surface of the thick-walled portion (25e). Also good. According to this, the rigidity of a rotating shaft part (25b, 25c) can be improved further, and the twist of a rotating shaft part (25b, 25c) can be suppressed.

  In the air passage opening / closing door having the above-described characteristics, the rotation shaft portion includes a first shaft portion (25b) protruding from the door body portion (25a) toward the inner wall of the case (11), and a first shaft portion (25b). ), And has a second shaft portion (25c) projecting from the door body portion (25a) toward the inner wall of the case (11), and the first and second shaft portions (25b, 25c). The range in the direction of the rotation axis (E) where the slab is formed and the range in the direction of the central axis (F) where the thick part (25e) is formed may overlap each other.

  According to this, since the rotating shaft portion (25b, 25c) is composed of two shaft portions, the weight of the air passage opening / closing door can be reduced.

  Further, the range in the direction of the rotation axis (E) where the first and second shaft portions (25b, 25c) are formed and the range in the direction of the central axis (F) where the thick portion (25e) is formed are mutually over. Since it is wrapped, it is possible to increase the rigidity of the root portion of the first and second shaft portions (25b, 25c) where stress tends to concentrate when the rotational driving force is transmitted to the rotation shaft portions (25b, 25c). .

  In the air passage opening / closing door having the above characteristics, the base portion of the first and second shaft portions (25b, 25c) extends from the thick portion (25e) toward the first and second shaft portions (25b, 25c). Reinforcing root reinforcing ribs (25h, 25i) may be formed. According to this, the rigidity of the root portion of the first and second shaft portions (25b, 25c) can be further increased.

  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)
A first embodiment of the present invention will be described with reference to FIGS. In this embodiment, an example in which the air passage opening and closing door of the present invention is applied to a mode switching door of an indoor air conditioning unit of a vehicle air conditioner will be described. FIG. 1 is a schematic cross-sectional view of an air conditioning unit 10 among indoor air conditioning units. In addition, the up and down and front and rear arrows in FIG. 1 indicate directions in the vehicle-mounted state of the air conditioning unit 10.

  The indoor air conditioning unit is roughly classified into an air conditioning unit 10 shown in FIG. 1 and a blower unit (not shown) that blows air to the air conditioning unit 10. The air conditioning unit 10 is disposed at a substantially central portion in the vehicle width direction inside the instrument panel (instrument panel) at the foremost part of the vehicle interior. On the other hand, the blower unit is arranged offset from the center to the passenger seat side inside the instrument panel.

  The blower unit includes an inside / outside air switching box that switches between outside air (outside air in the passenger compartment) and inside air (inside the passenger compartment), and a blower that blows air sucked through the inside / outside air switching box toward the inside of the passenger compartment. It is configured. This blower drives a known centrifugal multiblade fan (sirocco fan) with an electric motor.

  The air conditioning unit 10 includes a case 11 that forms an outer shell of the air conditioning unit 10 and also forms an air passage for indoor blown air that is blown toward the vehicle interior. The case 11 is formed of a resin (for example, polypropylene) having a certain degree of elasticity and excellent in strength.

  Furthermore, the case 11 has a dividing surface in the vehicle vertical direction at a substantially central portion in the vehicle width direction, and can be divided into two divided portions on the left and right by this dividing surface. The left and right divided parts accommodate a later-described evaporator 12, heater core 13, air mix door 16, defroster door 25, face / foot door 26, and the like, and fastening means such as metal spring clips and screws. Are joined together.

  An air inlet space 14 indicated by a broken line in FIG. 1 is formed on the most front side of the case 11. The air inlet space 14 constitutes an inflow space into which the indoor air blown from the blower of the blower unit described above flows.

  The evaporator 12 is arranged in a substantially vertical direction (substantially vertical direction) immediately after the air flow downstream of the air inlet space 14. The evaporator 12 is one of the components constituting a well-known vapor compression refrigeration cycle (not shown), and evaporates the low-pressure refrigerant in the refrigeration cycle to exert an endothermic effect, thereby allowing indoor air to be blown. A cooling heat exchanger for cooling.

  A heater core 13 is arranged at a predetermined interval on the downstream side of the air flow of the evaporator 12 (the vehicle rear side). The heater core 13 causes high-temperature engine coolant that circulates through an engine coolant circuit (not shown) to flow inside, heat exchange between the engine coolant and the cool air that has passed through the evaporator 12, and reheats the cool air. It is an exchanger.

  The heater core 13 is also arranged in a substantially vertical direction, but is arranged so that the upper side from the lower side is slightly inclined toward the vehicle rear side. Thereby, the rotation operation space of the air mix door 16 mentioned later is ensured. In addition, that the evaporator 12 and the heater core 13 are arranged in a substantially vertical direction means that the heat exchange core surface is arranged so as to extend in a substantially vertical direction.

  Next, a cold air bypass passage 15 is formed on the rear side of the evaporator 12 and on the upper side of the heater core 13. The cold air bypass passage 15 constitutes an air passage through which the cold air after passing through the evaporator 12 flows around the heater core 13. Further, a mixing chamber 20 described later is disposed on the downstream side (the vehicle upper side) of the cold air bypass passage 15.

  Accordingly, among the cool air cooled by the evaporator 12, the indoor blown air (cold air) flowing in the direction of arrow A is reheated by the heater core 13 and flows into the mixing chamber 20 via the warm air passage 19 described later. . On the other hand, the cold air flowing in the direction of the arrow B flows into the mixing chamber 20 without being reheated.

  Further, an air mix door 16 is disposed between the evaporator 12 and the heater core 13 and below the cold air bypass passage 15. The air mix door 16 has a function of adjusting the air volume ratio between the cool air cooled by the evaporator 12 and the cool air (arrow A) that flows into the heater core 13 and the cool air (arrow B) that flows into the cool air bypass passage 15. Fulfill.

  Specifically, the air mix door 16 is disposed so as to extend in the vehicle width direction on the upper side of the heater core 13 and on the front side of the vehicle, and a plate-like door body that rotates integrally with the rotary shaft 16a. It has a portion 16b. Further, the rotary shaft 16a is configured as a so-called cantilever door disposed on one end side of the door main body 16b.

  The rotating shaft 16 a is rotatably supported by bearing holes (not shown) on the left and right wall surfaces of the case 11, and one end of the rotating shaft 16 a protrudes outside the case 11. And the part which protruded outside the case 11 is connected with the servomotor 17 via the link mechanism which is not shown in figure. Then, the rotational driving force is transmitted from the servo motor 17 to open / close the air mix door 16.

  A warm air passage 19 is formed on the downstream side (vehicle rear side) of the air flow of the heater core 13. The hot air passage 19 is a passage that guides the hot air that has passed through the heater core 13 to the mixing chamber 20, and has a shape that curves from the vehicle rear side of the heater core 13 toward the upper portion of the heater core 13. The outlet side of the hot air passage 19 disposed above the heater core 13 is connected to the mixing chamber 20, and the hot air flows in the direction of arrow C and flows into the mixing chamber 20.

  The mixing chamber 20 is a space that mixes the cold air (arrow B) that has passed through the cold air bypass passage 15 and the hot air (arrow C) that has passed through the hot air passage 19 as shown by the broken line in FIG. The air mix door 16 between the container 12 and the heater core 13 is disposed above the space in which the air mix door 16 rotates.

  And in the mixing chamber 20, the warm air (arrow C) and the cold air (arrow B) which flowed in are mixed, and the temperature of the indoor blowing air blown out into the vehicle interior is adjusted. Therefore, the above-mentioned air mix door 16 constitutes a temperature adjusting means for the indoor blown air, and the temperature of the indoor blown air is adjusted to a desired temperature by adjusting the opening position of the air mix door 16.

  Next, a substantially rectangular defroster opening 21 having a long side in the vehicle width direction is disposed on the upper surface of the case 11 substantially above the mixing chamber 20. The defroster opening 21 is connected to a defroster outlet on the upper surface of the vehicle instrument panel via a defroster duct (not shown). Accordingly, the indoor blown air that has passed through the defroster opening 21 from the mixing chamber 20 is blown out from the defroster outlet toward the inner surface of the vehicle front window glass.

  Further, the defroster opening 21 is opened and closed by a defroster door 25 described later. When the defroster door 25 closes the defroster opening 21 at the periphery of the defroster opening 21, the defroster door 21 is opened. A seat surface 21a with which 25 seal portions 25d abut is formed.

  The defroster door 25 also functions to open and close the communication port portion 23 that allows the mixing portion 20 and the face opening portion 22 and the mixing portion and the foot opening portion 24 to communicate with each other. Therefore, a seat surface 23 a is formed at the peripheral edge of the communication port portion 23 so that the seal portion 25 d of the defroster door 25 contacts when the defroster door 25 closes the communication port portion 23.

  The face opening 23 is arranged on the rear side of the defroster opening 21 and is formed in a substantially rectangular shape having a long side in the vehicle width direction, like the defroster opening 21. The face opening 22 is connected to a face outlet on the front surface of the vehicle instrument panel via a face duct (not shown). Therefore, the indoor air that has passed through the face opening 22 from the mixing chamber 20 through the communication opening 23 is blown out from the face outlet toward the upper body of the occupant.

  Foot openings 24 are disposed on the left and right wall surfaces of the air conditioning case 11 below the face opening 22 and above the warm air passage 19. The foot opening 24 is connected to a foot outlet provided near the foot of an occupant in the passenger compartment via a foot duct (not shown). Therefore, the indoor air that has passed through the foot opening 24 from the mixing chamber 20 via the communication port 23 is blown out from the foot outlet toward the feet of the occupant.

  Further, the face opening 22 and the foot opening 24 are opened and closed by a face / foot door 26. When the face / foot door 26 closes the face opening 22 at the periphery of the face opening 22. In addition, a seat surface 22 a with which the seal portion 26 d of the face / foot door 26 abuts is formed, and a similar seat surface 24 a is formed on the upstream side of the air flow of the foot opening 24.

  Next, details of the defroster door 25 and the face / foot door 26 that function as a mode switching door for switching the blowing mode in the vehicle air conditioner of the present embodiment will be described. Since the basic configurations of the defroster door 25 and the face / foot door 26 are the same, the details of the defroster door 25 will be described below with reference to FIG. 2A is a top view of the defroster door 25, and FIG. 2B is a sectional view taken along the line DD of FIG.

  First, the defroster door 25 is disposed in the case 11 (specifically, in the mixing chamber 20), and opens and closes the defroster opening 21 and the communication port 23. That is, the defroster door 25 has an air passage extending from the mixing chamber 20 to the defroster outlet through the defroster opening 21, and the face opening 22 side and the foot opening 24 from the mixing chamber 20 through the communication port 23. The air passage opening / closing door is configured to open and close the air passage leading to the side.

  Specifically, the defroster door 25 is configured to include a door main body portion 25a, rotary shaft portions 25b and 25c, a seal portion 25d, a thick wall portion 25e, and the like, and the rotary shaft portions 25b and 25c are included in the door main body portion 25a. It is comprised as what is called a cantilever door arrange | positioned at one edge part side.

  The door main body 25a is a plate-like member that opens and closes an air passage (specifically, the defroster opening 21 and the communication port 23). The door main body 25 a is formed of a resin material (specifically, polypropylene or the like) and has a substantially rectangular shape that fits into the defroster opening 21.

  In addition, as shown in FIG. 2, a plurality of reinforcing ribs 25f that enhance the rigidity of the door main body 25a are formed integrally with the door main body 25a on the plate surface of the door main body 25a. The reinforcing rib 25f is formed so that its height gradually decreases as it moves away from the rotary shaft portions 25b and 25c.

  The rotary shaft portions 25b and 25c are formed integrally with the door main body portion 25a, and project from the door main body portion 25a toward the inner wall of the case 11 in one direction in the vehicle width direction, and the first shaft portion. It is formed coaxially with respect to 25b, and is divided into a second shaft portion 25c that protrudes from the door body portion 25a toward the inner wall of the case 11 toward the other side in the vehicle width direction.

  These first and second shaft portions 25b and 25c are rotatably supported by bearing holes (not shown) on the left and right wall surfaces of the case 11, and the first shaft portion 25b of the rotation shaft portions 25b and 25c. Protrudes outside the case 11. The first shaft portion 25b protruding to the outside of the case 11 is connected to a servo motor 27 via a link mechanism (not shown), and rotational driving force is transmitted from the servo motor 27 to open and close the defroster door 25. Operated.

  In addition, the 1st axial part 25b and the link mechanism are connected in the state stopped by the D hole fitting. In the present embodiment, a D hole (not shown) is formed inside the first shaft portion 25b. Of course, a D hole may be formed on the link mechanism side.

  The seal portion 25 d is formed so as to extend from the outer peripheral end portion of the door body portion 25 a toward the case 11, and is elastic to the seat surface 21 a at the peripheral portion of the defroster opening portion 21 when closing the defroster opening portion 21. When the contact port portion 23 is contacted while being deformed and the communication port portion 23 is closed, a so-called lip seal type seal member is formed that contacts the seat surface 23a around the communication port portion 23 while being elastically deformed.

  That is, the seal portion 25d includes a door-side seal portion extending in a substantially U shape along the outer peripheral end portion of the door main body portion 25a, and the rotary shaft portions 25b and 25c on the opposite side to the door main body portion 25a. It is formed so as to surround the periphery of the door main body portion 25a by a seal portion on the shaft portion side extending in parallel with the shaft portion.

  When the defroster door 25 closes the defroster opening 21 or the communication port 23, the seal part on the door side of the seal part 25d abuts against the seat surfaces 21a and 23a, and the seal part on the shaft part side The case 11 is in close contact with the inner wall having a substantially arc-shaped cross section formed along the outer periphery of the rotary shaft portions 25b and 25c.

  Further, as shown in FIG. 2 (b), the door-side seal portion employs a so-called double lip type in which the door-side seal portion extends in a bifurcated manner toward the defroster opening 21 side and the communication port portion 23 side. . Thereby, the adhesiveness of the seal part by the side of a door and each sheet surface 21a, 23a is improved.

  In the present embodiment, specifically, the seal portion 25d is formed of a thermoplastic elastomer. A thermoplastic elastomer is a material that exhibits rubber elasticity at normal temperature, melts and exhibits fluidity when heated at high temperature, and can be injection-molded in the same manner as a thermoplastic resin.

  Further, as shown in FIG. 2B, the door body portion 25a is formed to be thicker than the plate thickness of the door body portion 25a and to extend in the direction of the rotation axis E of the rotation shaft portions 25b and 25c. The thick portion 25e thus formed is formed.

  The cross-sectional shape perpendicular to the rotation axis E direction of the thick portion 25e is formed in a substantially rectangular shape, and a line parallel to the rotation axis E passing through the center of gravity of the rectangle is defined as the central axis F of the thick portion 25e. , The rotation axis E of the rotation shaft portion 25b and the center axis F of the thick portion 25e are arranged so as to be shifted from each other. Specifically, the central axis F of the thick portion 25e is disposed closer to the center of the door body 25a than the rotation axis E of the rotary shafts 25b and 25c.

  On the surface of the thick portion 25e, a thick portion reinforcing rib 25g that enhances the synthesis of the thick portion 25e is formed. Specifically, the thick rib reinforcing ribs 25g are formed by extending ribs formed so as to extend obliquely at two different angles with respect to the longitudinal direction of the thick portion 25e in the longitudinal direction of the thick portion 25e. Is formed. In the present embodiment, as shown in the top view of FIG. 2A, the letter W is continuously connected.

In addition, the thick portion 25e extends from the thick portion 25e toward the first and second shaft portions 25b and 25c at the ends on both ends in the central axis F direction, and the roots of the first and second shaft portions 25b and 25c. Root portion reinforcing ribs 25h and 25i are formed to reinforce the portion. Further, the first and second shaft portions 25b and 25c are formed in a range in the direction of the rotation axis E (range G in FIG. 2A). The range and the range in the direction of the central axis F where the thick portion 25e is formed (the range H in FIG. 2A) overlap each other.

  That is, the range H in the direction of the rotation axis E in which the first and second shaft portions 25b and 25c are formed when viewed from a direction parallel to the door body portion 25a and perpendicular to the rotation axis E and the central axis F, and The range G in the direction of the central axis F where the thick part 25e is formed is arranged so as to overlap.

  Next, the face / foot door 26 is disposed in the case 11 (specifically, the space downstream of the communication port 23), and opens and closes the face opening 22 and the foot opening 24. That is, the face / foot door 26 has an air passage extending from the communication port 23 side to the face air outlet side via the face opening 22 and from the communication port 23 side to the foot air outlet side via the foot opening 24. It is an air passage opening / closing door that opens and closes the air passage that reaches.

  As described above, the face / foot door 26 is also configured as a cantilever door having the same door main body portion 26a as the defroster door 25, rotating shaft portions 26b and 26c, a seal portion 26d, a thick portion, and the like. Further, the rotary shaft portions 26b and 26c of the face / foot door 26 are also divided into a first shaft portion 26b and a second shaft portion 26c.

  The first and second shaft portions 26b and 26c are also rotatably supported by bearing holes (not shown) on the left and right wall surfaces of the case 11, and the first shaft portion 25b of the defroster door 25 and the vehicle width direction. The first shaft portion 26b disposed on the same side protrudes outside the case. The first shaft portion 26b protruding outside the case 11 is coupled 27 to a servo motor that is common to the defroster door 26 via a link mechanism (not shown).

  Next, an outline of the electric control unit of this embodiment will be described with reference to the block diagram of FIG. The operation of the servo motor 17 for the air mix door 16, the defroster door 25 and the servo motor 27 for the face / foot door 26 is controlled by a control signal from the air conditioning control device 30.

  The air conditioning control device 30 includes a known microcomputer including a CPU, a ROM, a RAM, and the like and peripheral circuits thereof. The air conditioning control device 30 stores an air conditioning device control program in its ROM, performs various calculations and processes based on the air conditioning device control program, and controls the operation of the air conditioning control device connected to the output side. .

  On the input side of the air conditioning control device 30, vehicle environmental conditions such as an outside air sensor 31 that detects the outside air temperature Tam, an inside air sensor 32 that detects the inside air temperature Tr, and a solar radiation sensor 33 that detects the amount of solar radiation Ts incident on the vehicle interior are displayed. The sensor group to detect, the operation switch 34a which outputs the operation command signal of a vehicle air conditioner, the temperature setting switch 34b which sets the vehicle interior target temperature Tset, the blowing mode switch 34c which sets the blowing mode manually, etc. were provided. An operation panel 34 is connected.

  Next, the operation of this embodiment in the above configuration will be described. When the operation switch 34a is turned on in the vehicle operating state, the air conditioner control program stored in the ROM by the air conditioner control apparatus 30 is executed. When the air conditioner control program is executed, the detection signal detected by the sensor group and the operation signal of the operation panel are read. And based on these signals, the target blowing temperature TAO of vehicle interior blowing air is calculated.

  Further, the air conditioning control device 30 determines the blow mode (control state of the servo motor 27), the target opening degree of the air mix door 16 (control state of the servo motor 17), etc., based on the target blow temperature TAO, and the determined control. Control signals are output to various actuators so that the state can be obtained. Then, the routine of reading the operation signal and detection signal → calculating TAO → determining a new control state → outputting the control signal is repeated.

  Here, the control state of the blowing mode will be described. The blowing mode is determined based on the target blowing temperature TAO with reference to a control map stored in the air conditioning control device 30 in advance. In the present embodiment, the blowing mode is sequentially switched from the face mode to the bi-level mode to the foot mode as the target blowing temperature TAO increases from the low temperature range to the high temperature range.

  In addition to the face mode, the bi-level mode, and the foot mode, the defroster mode can be switched by the operation signal of the blowing mode switch 34c. Hereinafter, the opening / closing states of the air passage opening / closing doors (defroster door 25, face / foot door 26) of the present embodiment in each blowing mode will be described.

  The face mode is a mode in which conditioned air is blown from the face outlet toward the upper body side of the occupant. In the face mode, the defroster door 25 is rotated to a position where the defroster opening 21 is fully closed (solid line position in FIG. 1), and the face / foot door 26 fully opens the face opening 22 and fully opens the foot opening 24. The position is rotated to the closing position (two-dot chain line position I in FIG. 1).

  The bi-level mode is a mode in which conditioned air is blown out from the face air outlet toward the occupant's upper body side, and at the same time, conditioned air is blown out from the foot air outlet toward the occupant's feet. In this bi-level mode, the defroster door 25 is rotated to a position where the defroster opening 21 is fully closed, and the face / foot door 26 opens both the face opening 22 and the foot opening 24 to the same extent. The position is rotated to the position (solid line position in FIG. 1).

  The foot mode is a mode in which conditioned air is blown mainly from the foot outlet toward the feet of the passenger. In this foot mode, the defroster door 25 is rotated to a position where the communication port 23 is opened with the defroster opening 21 slightly opened. Further, the face / foot door 26 is rotated to a position (two-dot chain line position J in FIG. 1) where the face opening 22 is fully closed and the foot opening 24 is fully opened.

  The defroster mode is a mode in which conditioned air is blown from the defroster outlet toward the vehicle window glass. In this defroster mode, the defroster door 25 is rotated to a position (two-dot chain line position K in FIG. 1) where the defroster opening 21 is fully opened. In the present embodiment, as described above, each blowing mode is switched by rotating the defroster door 25 and the face / foot door 26 constituting the air passage opening / closing door.

  Next, the excellent effect by this embodiment is demonstrated to the defroster door 25 as an example. In the present embodiment, the rotational driving force is transmitted to the first shaft portion 25b on one end side of the rotation shaft portions 25b, 25c of the defroster door 25, and the defroster door 25 is opened / closed. Therefore, the rotation shaft portions 25b, 25c Are prone to twist.

  In contrast, the door main body portion 25a of the defroster door 25 of the present embodiment is formed with a thick portion 25e, and the rotation shaft E of the rotation shaft portions 25b and 25c and the central axis F of the thick portion 25e are Since it arrange | positions in the position which mutually shifted | deviated, the twist of rotating shaft part 25b, 25c can be suppressed by the thick part 25e.

  Further, since the thick-walled portion reinforcing ribs 25g are formed on the surface of the thick-walled portion 25e, the synthesis of the thick-walled portion 25e can be enhanced, and the torsion of the rotary shaft portions 25b and 25c can be further suppressed. .

  In addition, since the range in the direction of the rotation axis E where the first and second shaft portions 25b and 25c are formed and the range in the direction of the central axis F where the thick portion 25e is formed overlap each other, rotation drive It is possible to increase the rigidity of the root portions of the first and second shaft portions 25b and 25c where stress is easily concentrated when force is transmitted.

  Further, base portion reinforcing ribs 25h and 25i are formed extending from the thick portion 25e toward the first and second shaft portions 25b and 25c to reinforce the base portions of the first and second shaft portions 25b and 25c. Therefore, the rigidity of the base portion of the first and second shaft portions 25b and 25c can be further increased.

  Therefore, since the deformation | transformation by the twist of the rotating shaft parts 25b and 25c can be suppressed, the deformation | transformation of the door main-body part 25a integrally formed with respect to the rotating shaft parts 25b and 25c can be suppressed effectively. As a result, it is possible to effectively suppress wind leakage when the air passage is fully closed.

  Furthermore, since the rigidity of the rotating shaft portions 25b and 25c can be increased without unnecessarily increasing the diameter of the rotating shaft portions 25b and 25c, it may increase the ventilation resistance when the air passage is fully opened. Absent.

  Further, in this embodiment, since a lip seal type seal member is employed as the seal portion 25d, the rotation shaft E of the rotation shaft portions 25b and 25c is made closer to the door body portion 25a than the center axis F of the thick portion 25e. Even if it is arranged on the center side, the opening area of the air passage is not reduced when the air passage is fully opened.

  This will be described with reference to the schematic explanatory view of FIG. FIG. 4A shows a door that employs a lip seal type seal portion 25d, in which the air passage is fully closed by a defroster door 25 ′ in which the thick portion 25e is not formed. ) Shows a state in which the air passage is fully closed by the defroster door 25 of the present embodiment.

  Note that the outer sizes of the defroster door 25 ′ shown in FIG. 4A and the defroster door 25 of the present embodiment shown in FIG. 4B are substantially the same.

  FIG. 4C shows a door that employs a seal portion 28d of the packing seal type, in which the air passage is fully closed by a defroster door 28 ′ (Comparative Example 1) that is not provided with a thick portion 25e. FIG. 4 (d) shows an example in which a seal portion 28d of a packing seal type is adopted, and the air passage is entirely removed by a defroster door 28 (Comparative Example 2) provided with a thick portion 28e as in this embodiment. Indicates the closed state.

  Here, the packing seal type means that the packing seal member formed of urethane packing material or the like is disposed on the plate surface of the door main body, and when the air passage is fully closed, the packing seal member is moved to the case side seat surface. It is the type which seals the clearance gap between a door and an air passage by making it contact | abut. The outer sizes of the defroster door 28 'shown in FIG. 4C and the defroster door 28 of the present embodiment shown in FIG. 4D are substantially the same.

  In the packing seal type door, when the thick portion 28e is provided, it is necessary to dispose the packing seal member away from the rotating shaft portion 28b, and as shown in L3 and L4 of FIGS. 4 (c) and 4 (d), L4 becomes shorter than L3, and the opening area of the air passage is reduced.

  On the other hand, in the lip seal type, even if the thick portion 28e is provided, L1 and L2 do not change as shown in L1 and L2 in FIGS. 4 (a) and 4 (b). Will not decrease.

  Further, the above-described effects can be similarly obtained in the face / foot door 26.

(Second Embodiment)
In the first embodiment, the thick-walled portion reinforcing ribs 25g are formed on the surface of the thick-walled portion 25e. The thick-walled reinforcing ribs 25g are continuously connected to each other in the present embodiment. As shown in the top view, the ribs formed so as to extend obliquely at two different angles with respect to the longitudinal direction of the thick portion 25e continuously in the longitudinal direction of the thick portion 25e. Forming.

  That is, the thick portion reinforcing ribs 25g 'having a shape in which the letters X are continuously connected are provided on the surface of the thick portion 25e. FIG. 5 is a drawing corresponding to FIG. 2 of the first embodiment, and the same or equivalent parts as in the first embodiment are denoted by the same reference numerals. Even when the thick portion reinforcing rib 25g 'of the present embodiment is employed, the same effects as those of the first embodiment can be obtained. Of course, the reinforcing rib for the thick portion of the face / foot door 26 may be configured in the same manner.

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

  (1) In the above-described embodiment, for example, in the defroster door 25, the first shaft portion 25b and the second shaft portion 25c are provided separately as the rotation shaft portion. Of course, the first shaft portion 25b and the second shaft are provided. The portions 25c may be connected to form a single rotating shaft portion.

  (2) In the above-described embodiment, the air passage opening / closing door of the present invention is applied to the defroster door 25 and the face / foot door 26 constituting the mode switching door in the vehicle air conditioner. It is not limited.

  For example, you may apply to an air mix door. According to this, it is possible to improve the sealing performance of the air mix door at the time of maximum heating in which the cool air cooled by the evaporator 12 flows into only the heater core 13 side and at the time of maximum cooling in which only the cool air bypass passage 15 flows. Further, the present invention is not limited to an air passage opening / closing door for a vehicle air conditioner, and can be applied to various uses.

  (3) In the above-described embodiment, the cross-sectional shape perpendicular to the central axis F of the thick portion 25e is formed in a substantially rectangular shape, but the cross-sectional shape is not limited to this. A circular shape, an elliptical shape, and other polygonal shapes can be adopted as long as the shape is effective in suppressing twisting of the rotating shaft portions 25b and 25c.

  (4) In the above-described embodiment, as shown in FIGS. 2 (b) and 5 (b), the double lip type is adopted as the door-side seal portion of the seal portion 25d. Alternatively, a so-called single lip type that extends parallel to the plate surface of the door main body 25a may be employed. Furthermore, you may employ | adopt the diagonal single lip type which inclines and extends with respect to the plate surface of the door main-body part 25a.

It is sectional drawing of the air conditioning unit of 1st Embodiment. (A) is a top view of the defroster door of 1st Embodiment, (b) is DD sectional drawing of (a). It is a block diagram which shows a part of electric control part of 1st Embodiment. It is explanatory drawing explaining the opening area of the air passage which an air passage opening / closing door opens and closes. (A) is a top view of the defroster door of 2nd Embodiment, (b) is DD sectional drawing of (a).

Explanation of symbols

11 ... Case, 25 ... Defroster door, 25a ... Door body,
25b ... 1st axial part, 25c ... 2nd axial part, 25d ... Seal part, 25e ... Thick part,
25g, 25g '... thick rib reinforcing ribs, 25h, 25i ... root reinforcing ribs,
E: rotation axis, F: central axis.

Claims (5)

A door body (25a) disposed in a case (11) forming an air passage to open and close the air passage;
Rotating shafts (25b, 25c) formed so as to protrude from the door body (25a) toward the inner wall of the case (11) and rotatably supported by the case (11);
When the air passage is closed at the outer peripheral end of the door main body (25a), the seat surface (21a, 23a) formed on the inner wall surface of the case (11) is elastically deformed while the air passage is closed. An air passage opening / closing door provided with a seal portion (25d) in contact therewith,
The door body (25a) is formed to be thicker than the door body (25a) and extends in parallel to the rotation axis (E) of the rotation shaft (25b, 25c). A thick wall portion (25e) formed in
The air passage opening / closing door, wherein the rotation shaft (E) of the rotation shaft portion (25b, 25c) and the central axis (F) of the thick wall portion (25e) are shifted from each other. The rotating shaft (E) of the rotating shaft portion (25b, 25c) is disposed on one end side of the door body portion (25a),
Furthermore, the central axis (F) of the thick wall portion (25e) is disposed closer to the center side of the door body portion (25a) than the rotation shaft (E) of the rotation shaft portions (25b, 25c). The air passage opening / closing door according to claim 1. The thick-walled portion (25e) is provided with thick-walled reinforcing ribs (25g, 25g ') for increasing the rigidity of the thick-walled portion (25e). The air passage opening and closing door described in 1. The rotating shaft portion is formed coaxially with respect to the first shaft portion (25b) projecting from the door body portion (25a) toward the inner wall of the case (11), and the first shaft portion (25b), A second shaft portion (25c) projecting from the door body portion (25a) toward the inner wall of the case (11);
The range in the rotation axis (E) direction in which the first and second shaft portions (25b, 25c) are formed, and the range in the central axis (F) direction in which the thick portion (25e) is formed are The air passage opening / closing door according to any one of claims 1 to 3, wherein the doors overlap each other. Reinforcement ribs for root portions that extend from the thick portion (25e) toward the first and second shaft portions (25b, 25c) and reinforce the root portions of the first and second shaft portions (25b, 25c) ( 25h, 25i) is formed, The air passage opening / closing door according to claim 4.

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