JP2007276547A - Air flow passage changing device, and air-conditioning device for vehicle provided with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air flow passage changing device, capable of reducing the flow of air taken from an air intake port toward other air intake port when a rotary door does not completely shut the air intake port. <P>SOLUTION: The air flow passage changing device is provided with an air conditioner case 2 having an outside air intake port 3 and an inside air intake port 4, and a rotary door 5 disposed rotatable around a rotation shaft 5c in the air conditioner case 2 for changing opening/closing of the outside air intake port 3 and the inside air intake port 4. On the rotary door 5, an arc-shaped outer circumferential part 5b extended in the rotating direction, and integrally connected to the rotation shaft 5c, and a first side opening 5d and a second side part 5a at connecting positions for both rotation direction end parts of the arc-shaped outer circumferential part 5d to the rotation shaft 5c are formed, and a ventilation shielding plate 5a is provided on the second side part 5a to prevent air current A flowing through a passage from the first side opening 5d toward the second side part 5a. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an air flow switching device that switches an air flow by rotating a rotary door, and a vehicle air conditioner including the air flow switching device.

  The thing of patent document 1 is known as a conventional airflow path switching device. The air flow passage switching device includes a case provided with an inside air introduction port and an outside air introduction port, a circumferential substrate portion that is rotatably arranged around the rotation axis in the case, and extends in the rotation direction, And a rotary door having a side plate portion integrally connecting the substrate portion to the rotating shaft.

This rotary door is a door for switching between inside and outside air that switches between opening and closing of the inside air introduction port and the outside air introduction port, and by setting the rotation position to a predetermined position, a seal portion provided on the outer peripheral portion of the substrate portion and The inside air introduction port or the outside air introduction port can be closed by the substrate portion. In addition, even when the rotary door is in an intermediate position where neither the inside air introduction port nor the outside air introduction port is closed, a configuration is adopted in which the gap between the substrate portion and the inner wall of the case is reduced. It is possible to prevent the outside air flowing in from the outside air introduction port from flowing into the vehicle interior from the inside air introduction port.
Japanese Patent Laying-Open No. 2005-219679 (see FIG. 4)

  However, the air flow passage switching device disclosed in Patent Document 1 generates an air flow that passes through the inner passage of the rotary door formed between the base plate portion and the rotary shaft when the rotary door is in the intermediate position, and the outside air There was a problem that the outside air taken in from the introduction port directly flows into the inside air introduction port and flows into the vehicle interior. In particular, this phenomenon becomes prominent when the ram pressure due to vehicle travel increases. When this phenomenon occurs, the resistance to suck the inside air into the case increases and the maximum air volume, in other words, the maximum cooling performance decreases.

  Accordingly, the object of the present invention has been made in view of the above problems, and when the rotary door does not completely close the air intake, the air taken in from the air intake is directed to the other air intake side. An object of the present invention is to provide an air flow path switching device that reduces flow and a vehicle air conditioner including the same.

  In order to achieve the above object, the following technical means are adopted. That is, the first invention has an air conditioning case (2) having a first air intake (3) and a second air intake (4), in which conditioned air flowing through the interior is blown into the vehicle interior, and air conditioning A rotary door (5, 5A) that is disposed in the case (2) so as to be rotatable about the rotation shaft (5c) and switches between opening and closing of the first air intake (3) and the second air intake (4). And a rotary door (5, 5A) having a shape that extends in the direction of rotation of the rotary door (5, 5A) and integrated and connected to the rotary shaft (5c). A first side part (5d) and a second side part (5a, 5f) corresponding to the part connecting the rotation axis (5c) and the rotation axis (5c) with both ends of the rotation part (5b) and the substrate part (5b). And between the substrate part (5b) and the rotating shaft (5c), the first side A passage blocking member (5a, 5e) is provided in the passage from (5d) to the second side portion (5a, 5f) to prevent the air flow (A) from passing through the passage. .

  According to the first aspect of the present invention, the air blocking member is provided in the passage extending from the first side portion to the second side portion, so that the air taken in from the air intake port directly enters other air. The flow to the intake side can be prevented, and the reduction in air conditioning performance can be prevented. In particular, it is possible to provide a device that does not require control of the door opening relative to the ram pressure during traveling, output correction of the air blowing means, or the like.

  According to a second invention, in the first invention, the first air intake (3) is configured as an outside air intake (3), the second air intake (4) is configured as an internal air intake (4), and a rotary is provided. When the door (5, 5A) is switched between opening and closing of the inside air inlet (3) and the outside air inlet (4), the first seal portion (23), the second seal portion (2) provided on the first side portion (5d) side The outside air intake (3) is closed by the third seal portion (22) and the substrate portion (5b) provided on the side portion (5a, 5f) side of the second side portion (5a, 5f) side It is preferable to close the inside air inlet (4) by the second seal portion (21) and the ventilation blocking member (5a, 5e) provided on the inside.

  According to the present invention, the load direction applied to the base plate portion of the door due to the ram pressure during traveling and the door rotation direction are different, so that it is strong against the ram pressure and prevents outside air from flowing into the inside air intake. An air flow passage switching device having a high effect can be provided.

  Furthermore, in any one of the above inventions, the ventilation blocking member (5e) forms a space formed between the substrate portion (5b) and the rotating shaft (5c) as a space on the first side portion (5d) side. And it is preferable to partition into a space on the second side portion (5f) side.

  According to the present invention, since the space between the substrate portion formed on the inner side of the rotary door and the rotating shaft is divided into two, the air taken in from the air intake port passes through the inner side of the rotary door to other air. The flow flowing to the intake side can be completely blocked.

  Furthermore, in the first invention or the second invention, it is preferable to provide the ventilation blocking member (5a) on the first side part (5d) or the second side part (5a). According to the present invention, since the ventilation blocking member is provided at a position close to one of the air intakes, the air taken in from the air intake is prevented from flowing into the door, and the turbulence of the air flow due to the recirculation of the air is prevented. Can be reduced.

  Furthermore, in any one of the above inventions, the length dimension (R1) of the first side portion (5d) from the rotation shaft (5c) to the rotation direction end of the substrate portion (5b) is the rotation shaft (5c). It is preferable that the length is shorter than the length dimension (R2) of the second side portion (5a, 5f) from the substrate portion (5b) to the rotation direction end portion.

  According to the present invention, the space between the outer surface of the base plate portion and the air intake port increases as the rotary door rotates from the state of closing the air intake port toward the intermediate position. It is possible to form an air flow that smoothly flows in the downstream area in the air conditioning case that leads to.

  Furthermore, in any of the above inventions, the length dimension (L1) of the first side portion (5d) extending in the axial direction of the rotating shaft (5c) is the first dimension extending in the axial direction of the rotating shaft (5c). It is preferable that it is shorter than the length dimension (L2) of 2 side parts (5a, 5f).

  According to this invention, as the rotary door rotates from the state of closing the air intake port toward the intermediate position, the rotary door is connected between the side portion of the rotary door that connects the substrate portion and the rotary shaft, and the air intake port. Since the space expands, it is possible to form an air flow that smoothly flows in the downstream area in the air conditioning case that leads to the vehicle interior outlet.

  3rd invention is invention concerning the air conditioner for vehicles provided with the air flow passage switching device of any one of the above-mentioned invention, Comprising: The rotary door (5, 5A) of an air flow passage switching device is an air-conditioning case (2 ) Is an inside / outside air switching door (5, 5A) disposed inside an inside / outside air switching box (6).

  According to the present invention, it is possible to prevent the outside air taken in from the outside air intake from directly flowing into the inside air intake side, so that it is possible to prevent a decrease in air conditioning performance, for example, maximum cooling performance.

  In addition, the code | symbol in the bracket | parenthesis of each said means is an example which shows a corresponding relationship with the specific means of embodiment mentioned later.

(First embodiment)
A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a schematic diagram showing the internal configuration of the vehicle air conditioner of the present embodiment. FIG. 2 is a cross-sectional view showing a configuration of a rotary door as an air flow path switching device in the vehicle air conditioner. FIG. 3 is a perspective view showing the configuration of the rotary door. FIG. 4 is a plan view of the rotary door shown in FIG. 3 as viewed from the Z direction.

  The vehicle air conditioner 1 according to the present embodiment includes an air conditioning case 2 and air ducts that connect the air conditioning case 2 and the vehicle interior outlet. The air conditioning case 2 includes a plurality of case members, and is a resin molded product such as polypropylene, for example.

  In the air conditioning case 2, an inside / outside air switching box 6 for taking in outside air or inside air in a switchable manner, a blower 8 for blowing the air inside or outside the vehicle interior to the evaporator 9 and after, and an air conditioner arranged downstream from the blower 8. Unit parts are provided in this order from the upstream. The inside / outside air switching box 6 and the blower 8 are provided on the back side of the instrument panel in the front part of the passenger compartment at a position closer to the passenger seat from the center of the vehicle. The air conditioning unit parts are provided near the center of the vehicle on the back side of the instrument panel.

  In the inside / outside air switching box 6, an outside air inlet 3 as a first air inlet and an inside air inlet 4 as a second air inlet are opened, and these inlets are connected to a suction port 8 b of the blower 8. Communicate. Note that the outside air inlet 3 or the inside air inlet 4 is connected to the outside of the vehicle or the vehicle interior by a duct as necessary. Inside the inside / outside air switching box 6, a rotary door 5 is provided as an inside / outside air switching door that switches between opening and closing of the outside air inlet 3 and the inside air inlet 4.

  As shown in FIG. 2, the rotary door 5 is disposed so as to be rotatable about a rotation shaft 5 c located on the opposite side of the air inlet 8 b of the blower 8, and has a shape extending in the rotation direction. It has the circular-arc-shaped outer peripheral part 5b as a board | substrate part which has and was connected to the rotating shaft 5c. The arcuate outer peripheral portion 5 b is located on the side close to the suction port 8 b of the blower 8. Further, the rotary door 5 is formed with a first side portion and a second side portion 5a corresponding to a portion connecting the both ends of the arcuate outer peripheral portion 5b in the rotational direction and the rotating shaft 5c. Yes.

  In other words, the first side portion corresponds to the entire plane portion formed so as to extend from the rotation direction end portion on the outside air inlet 3 side in the arc-shaped outer peripheral portion 5b toward the rotation shaft 5c. The first side opening 5d is an opening provided in this plane portion (first side portion). Similarly, the 2nd side part 5a is equivalent to the whole plane part formed so that it may extend toward the rotating shaft 5c from the rotation direction edge part by the side of the internal air inlet 4 in the circular arc outer peripheral part 5b. It is.

  Further, the rotary door 5 is formed between the arc-shaped outer peripheral portion 5b and the rotation shaft 5c and extends from the first side opening 5d (first side portion) to the second side portion 5a. The passage is provided with a ventilation blocking plate 5a as a ventilation blocking member for preventing the air flow A from passing through the passage.

  As described above, the rotary door 5 has a door surface (arc-shaped outer peripheral portion 5b) extending in a substantially circumferential direction at a predetermined position radially outward from the rotation center of the rotation shaft 5c, and the door surface and the rotation shaft 5c. First side portions and second side portions that extend in the axial direction of the rotating shaft 5c and extend from the rotating shaft 5c to both ends in the rotational direction of the door surface. It is a box-shaped door to be formed. The rotary door 5 is a component having resin as a main component, for example, having polypropylene as a main component. The rotary door 5 may be configured by mixing talc material, mica, glass, or the like as a reinforcing material in plastic such as polypropylene.

  Further, the rotary door 5 has a first seal portion 23 on the rotation side end portion of the arc-shaped outer peripheral portion 5b and on the first side portion side, and is a rotation direction end portion of the arc-shaped outer peripheral portion 5b. The second seal portion 21 and the third seal portion 22 are provided on the second side portion 5a side. Furthermore, the rotary door 5 has the 2nd seal | sticker part 21 in the rotation axis 5c side of the 2nd side part 5a.

  The first seal portion 23, the second seal portion 21, and the third seal portion 22 are walls that form an inner wall or an intake port of the air conditioning case 2 when the rotary door 5 closes the outside air intake port 3 or the inside air intake port 4. It functions as a sealing means that abuts against the air flow and blocks the air flow, and is made of an elastomer resin rich in elastic deformation, and is integrated with the arc-shaped outer peripheral portion 5b, the first side portion, the second side portion, etc. Is formed.

  The first seal portion 23 has a shape protruding in the rotating direction of the rotary door 5 toward the outside air inlet 3. The second seal portion 21 has a shape protruding in the rotating direction of the rotary door 5 toward the inside air intake 4. The third seal portion 22 has a shape protruding in the rotating direction of the rotary door 5 toward the outside air inlet 3.

  As shown in FIG. 3, the first seal portion 23 is formed on substantially the entire outer periphery of the first side portion, has a shape surrounding the first side opening 5d, and the second seal portion 21 is It is formed on substantially the entire outer periphery of the ventilation blocking plate 5a (second side portion) and has a shape surrounding all four sides. Further, the third seal portion 22 has a shape that protrudes outward from the arc-shaped outer peripheral portion 5b and both side plates that connect the arc-shaped outer peripheral portion 5b and the rotating shaft 5c, and is parallel to the axial direction of the rotating shaft 5c. It is provided along three sides excluding the sides.

  As shown in FIGS. 3 and 4, the first side portion 5d of the rotary door 5 has a radial length dimension from the center of the rotating shaft 5c to the end of the arcuate outer peripheral portion 5b in the rotational direction. R1 has a rectangular shape with a length L1 extending in the axial direction of the rotating shaft 5c. On the other hand, the second side portion (ventilation blocking plate 5a) has a radial length dimension R2 from the center of the rotating shaft 5c to the end of the arcuate outer peripheral portion 5b in the rotational direction, and the axis of the rotating shaft 5c. It has a rectangular shape with a length dimension L2 extending in the direction.

  The radial length R1 of the first side part 5d is preferably shorter than the radial length R2 of the second side part (ventilation blocking plate 5a). Moreover, it is preferable that the length dimension L1 of the 1st side part 5d is a dimension shorter than the length dimension L2 of the 2nd side part (ventilation interruption | blocking board 5a). That is, the rotary door 5 is a door in which the side portion with the shorter radial length is located closer to the outside air intake 3. Due to this dimensional relationship, the side plate that integrally connects the arc-shaped outer peripheral portion 5b and the rotating shaft 5c gradually spreads in the axial direction of the rotating shaft 5c from the first side portion 5d to the second side portion. It becomes the form which inclines.

  The blower 8 includes a centrifugal multiblade fan 8a and a motor 7 for driving the fan. The centrifugal multiblade fan 8a is surrounded by a scroll casing. The blower outlet of the blower 8 is connected to a blower passage reaching the ventilation inlet of the evaporator 9 by a duct extending in the centrifugal direction of the centrifugal multiblade fan 8a.

  The air-conditioning unit components arranged downstream of the blower 8 passed through the evaporator 9 provided so as to cross the entire blower passage, the heater core 10 that heats the air that has passed through the evaporator 9, and the evaporator 9. An air mix door 13 that adjusts the amount of air passing through the heater core 10, and a defroster blow amount adjustment door 20, a face blow amount adjustment door 18, and a foot blow amount adjustment door 19 provided downstream of the air mix chamber, I have.

  The evaporator 9 evaporates the low-temperature and low-pressure refrigerant decompressed by an expansion valve in a refrigerating cycle (not shown) by receiving air from the blower 8 and cools the blown air passing around the tube through which the refrigerant flows. Is.

  The heater core 10 uses the high-temperature cooling water of the traveling engine 11 as a heat source to exchange heat with the blown air, and heats the air flowing around. The heater core 10 partially forms a passage downstream of the evaporator 9 in the air flow direction. It is arranged to close.

  The air mix door 13 is a one-side pivotal plate-like door provided downstream of the evaporator 9, and adjusts the ratio of the amount of air passing through the heater core 10 and the amount of air bypassing the heater core 10. By controlling the opening degree of the air mix door 13, the amount of air heated by the heater core 10 among the amount of air cooled by the evaporator 9 is adjusted, and the temperature of the air is adjusted by mixing these air in the air mix chamber. Made.

  The air mix chamber is a space where the air flowing from the evaporator 9 and the air heated by the heater core 10 are mixed, and communicates with the defroster outlet 17, the face outlet 14, and the foot outlet 15 on the downstream side. Yes. The conditioned air whose temperature is adjusted in this space is controlled at the appropriate air volume ratio by controlling the opening of each mode outlet door such as the defroster outlet adjustment door 20, the face outlet adjustment door 18, and the foot outlet adjustment door 19. Supplied into the passenger compartment.

  The defroster outlet 17 is an opening for blowing conditioned air along the side of the vehicle interior such as the front window glass, and the degree of fogging of the front window glass or the like is reduced by blowing this conditioned air.

  The face air outlet 14 communicates with a vehicle interior face air outlet facing the vehicle interior by a connected face air outlet duct (not shown). The vehicle interior face outlet is an opening for blowing conditioned air toward the upper body of the occupant, and is mainly used during cooling.

  The foot air outlet 15 communicates with a vehicle interior foot air outlet facing the vehicle interior by a connected foot air outlet duct (not shown). The vehicle interior foot outlet is an opening for blowing air-conditioning air to the feet of the front seat occupant and rear seat occupant, and is mainly used during heating.

  The ECU 16 includes temperature setting means for setting the temperature inside the vehicle interior, an inside air temperature sensor that detects the temperature inside the vehicle interior, an outside temperature sensor that detects the temperature of the outside air, a solar radiation sensor that detects the amount of solar radiation in the vehicle interior, and the evaporator 9. Signals from various sensors such as a temperature sensor that detects the downstream temperature and a water temperature sensor that detects the coolant temperature of the engine 11 are input. The ECU 16 executes a predetermined control program on the basis of input signals from various sensors, and rotates the rotary door 5, the blower 8, the air mix door 13, the defroster blowout amount adjustment door 20, the face blowout amount adjustment door 18, and the foot blowout A servo motor for driving each door such as the amount adjusting door 19 is controlled.

  Next, the relationship between the operation of the rotary door 5, the air intake and the air flow will be described with reference to FIG. When the ECU 16 controls the opening degree of the rotary door 5 which is an inside / outside air switching door to take in the inside air and operates the blower 8, the rotary door 5 closes the outside air intake 3 (the position indicated by X in FIG. 2). ), The arcuate outer peripheral portion 5b is positioned so as to face the outside air inlet 3, and the first seal portion 23 contacts the inner wall of the air conditioning case 2 (inside / outside air switching box 6) in the vicinity of the outside air inlet 3. The third seal portion 22 abuts against a wall portion that forms the outside air inlet 3. Since the rotary door 5 and the outside air inlet 3 have such a relationship, the outside air inlet 3 has an opening covered with an arcuate outer peripheral portion 5b, and a peripheral portion of the opening has the first seal portion 23 and the first sealing portion. Since it is sealed by the three seal portions 22, it is surely closed.

  And the inside air taken in from the inside of the vehicle passes through the inside air inlet 4 and flows outside the second side portion in the inside / outside air switching box 6 and is sucked into the suction port 8b of the blower 8 to be centrifugal multiblade fan 8a. The air is blown outward in the radial direction and is blown to the air conditioning unit component side in the air conditioning case 2.

  On the other hand, when the ECU 16 controls the opening degree of the rotary door 5 to take in the outside air and operates the blower 8, the rotary door 5 closes the inside air intake 4 (position indicated by Y in FIG. 2), and the second The second seal portion 21 forms the inner wall of the air conditioning case 2 (inside / outside air switching box 6) and the inside air inlet 4 in the vicinity of the inside air inlet 4. Abuts against the wall. Due to the relationship between the rotary door 5 and the internal air intake 4, the internal air intake 4 is covered with the draft blocking plate 5 a and the opening of the internal air intake 4 receives the load due to the ram pressure due to the introduction of the external air. Since the peripheral portion is sealed by the second seal portion 21, the peripheral portion is surely closed.

  The outside air taken from outside the vehicle passes through the outside air intake 3, flows outside the first side portion 5 d and the arcuate outer peripheral portion 5 b in the inside / outside air switching box 6, and enters the suction port 8 b of the blower 8. The air is sucked and blown outward in the radial direction of the centrifugal multiblade fan 8a, and blown to the air conditioning unit component side in the air conditioning case 2.

  Further, when the ECU 16 controls the opening degree of the rotary door 5 so as to take in the inside air and outside air and operates the blower 8, the rotary door 5 does not block both the outside air inlet 3 and the inside air inlet 4, and these The first seal portion 23 and the third seal are positioned between the intake ports (positions indicated by solid lines in FIG. 2), the arc-shaped outer peripheral portion 5 b is positioned so as to face a part of the outside air intake port 3. None of the portions 22 come into contact with the wall portion forming the outside air inlet 3.

  In addition, a space is formed between the first side portion 5d and the inner wall surface of the air conditioning case 2 (inside / outside air switching box 6), and also between the outer surface of the arcuate outer peripheral portion 5b and the outside air inlet 3. Since the space is formed, the air B taken from the outside of the vehicle passes through the outside air inlet 3 and flows along the outer surface of the arc-shaped outer peripheral portion 5b and the side plate connected to the rotating shaft 5c. The air is sucked into the suction port 8b, blown out radially outward of the centrifugal multiblade fan 8a, and blown to the air conditioning unit component side in the air conditioning case 2. Similarly, the air taken in from the passenger compartment passes through the inside air intake 4 and flows outside the second side portion, and is sucked into the suction port 8b of the blower 8 and the radius of the centrifugal multiblade fan 8a together with the outside air. Blows out in the direction.

  At this time, the air taken in from the outside of the vehicle is between the first side portion 5d and the inner wall surface of the inside / outside air switching box 6 in addition to the air B flowing along the outer surface and the side plate of the arc-shaped outer peripheral portion 5b. There may be an air flow A flowing into the space and flowing into the passage formed between the arcuate outer peripheral portion 5b and the rotating shaft 5c from the first side opening 5d. The airflow A tends to pass through the passage from the first side opening toward the second side portion, but the airflow blocking plate 5a which is a ventilation block member provided in the second side portion. The flow will be hindered by collision. In this way, the ventilation blocking plate 5a functions as an obstacle in the process in which the air flow A passing through the rotary door 5 moves to the inside air intake 4 side, so that outside air flows from the inside air intake 4 toward the vehicle interior. Can be prevented.

  The ventilation blocking plate 5a blocks a part of the passage formed between the arcuate outer peripheral portion 5b and the rotating shaft 5c and from the first side opening toward the second side portion. As long as the above effect is obtained, the air flow A may be prevented from flowing. Moreover, it is more preferable that the ventilation block plate 5a is a partition plate that is arranged so as to cross the passage and is completely partitioned.

  As described above, the air flow passage switching device or the vehicle air conditioner 1 according to the present embodiment has a shape that extends in the rotational direction of the rotary door 5 and is integrally connected to the rotary shaft 5c. An arcuate outer periphery 5b is formed, and a first side part 5d and a second side part corresponding to a portion connecting the rotating shaft 5c and both ends in the rotational direction of the arcuate outer periphery 5b are formed. A ventilation blocking plate 5a is provided between the portion 5b and the rotary shaft 5c, in the passage from the first side portion 5d to the second side portion, which prevents the air flow A from passing through the passage. It is a thing.

  According to this configuration, it is possible to prevent the air taken in from the air intake port from flowing directly to another air intake side, and it is possible to prevent a reduction in air conditioning performance.

  Further, the rotary door 5 has a first seal portion 23 provided on the first side portion 5d side and a second side portion provided on the second side portion side when switching between opening and closing of the inside air inlet 3 and the outside air inlet 4. The outside air intake 3 is closed by the 3 seal portion 22 and the arc-shaped outer peripheral portion 5b, and the inside air intake 4 is closed by the second seal portion 21 and the ventilation block plate 5a provided on the second side portion side. preferable.

  When this configuration is adopted, the load direction applied to the arcuate outer periphery 5b of the door due to the ram pressure during traveling and the rotation direction of the door are different from each other. The effect of preventing the air from flowing into the inside air intake 4 is further enhanced.

  Moreover, it is preferable to provide the ventilation blocking plate 5a so as to close the second side portion 5a near the inside air intake 4. In the case of adopting this configuration, the ventilation blocking plate 5a is provided at a position close to the inside air intake 4, so that the air taken in from the inside air intake 4 is prevented from flowing into the door, and the air flow caused by the recirculation of the air Can be reduced.

  In the rotary door 5, the length R1 of the first side portion 5d from the rotation shaft 5c to the end of the rotation direction of the arcuate outer peripheral portion 5b is such that the rotation of the arcuate outer periphery portion 5b from the rotation shaft 5c. It is preferable that the length is shorter than the length dimension R2 of the second side part 5a reaching the end in the direction.

  In the case of adopting this configuration, the rotary door 5 moves from the closed state of the outside air inlet 3 or the inside air inlet 4 toward the intermediate position, and the outer surface of the arcuate outer peripheral portion 5b and the air inlet Since the space between them can be expanded, a smooth air flow to the downstream area in the air conditioning case can be provided.

  In the rotary door 5, the length L1 of the first side portion 5d extending in the axial direction of the rotary shaft 5c is the length dimension L2 of the second side portion extending in the axial direction of the rotary shaft 5c. Shorter than that.

  When this configuration is adopted, the arcuate outer peripheral portion 5b and the rotary shaft 5c are connected as the rotary door 5 rotates from the state of closing the outside air intake 3 or the inside air intake 4 toward the intermediate position. Since the space between the side plate of the rotary door 5 and the air intake port can be expanded, a smooth air flow can be provided to the downstream area in the air conditioning case.

(Second Embodiment)
The air flow path switching device and the vehicle air conditioner of this embodiment will be described with reference to FIG. FIG. 5 is a partial cross-sectional view showing the configuration of the rotary door 5A in the air flow path switching device of the present embodiment. The air flow passage switching device of the present embodiment is a point that the air flow passage switching device in the first embodiment described above is replaced by the air flow shielding plate 5e in the rotary door that is an internal / external air switching door, The difference is that a second side opening 5f is provided in the second side portion. The configuration and control of other parts are the same as those of the vehicle air conditioner of the first embodiment.

  As shown in FIG. 5, the rotary door 5A is between the arcuate outer peripheral portion 5b and the rotating shaft 5c, and from the first side opening 5d (first side portion) to the second side opening 5f. A ventilation blocking plate 5e serving as a ventilation blocking member is provided in a range extending to, and the ventilation blocking plate 5e is configured to prevent the air flow A from passing through the passage from the first side opening 5d to the second side opening 5f. It obstructs the flow.

  As in the first embodiment, when the ECU 16 controls the operation of the rotary door 5A so as to take in the inside air and the outside air, the rotary door 5A does not block both the outside air inlet 3 and the inside air inlet 4, and these It is located between the intake ports, and the arcuate outer peripheral portion 5 b is positioned so as to face a part of the outside air intake port 3. Both the first seal portion 23 and the third seal portion 22 are outside air intake port 3. It does not abut against the wall part forming.

  The air B taken from outside the vehicle passes through the outside air intake 3, flows along the outer surface of the arc-shaped outer peripheral portion 5 b and the side plate connected to the rotating shaft 5 c, and is sucked into the suction port 8 b of the blower 8. It is. Similarly, air taken in from the passenger compartment passes through the inside air intake 4, flows outside the second side opening 5 f, is sucked into the suction port 8 b of the blower 8, and mixes with the outside air. The air is blown outward in the radial direction of the fan 8a.

  At this time, in addition to the air flow B, the air taken in from outside the vehicle flows into the space between the first side opening 5d and the inner wall surface of the inside / outside air switching box 6, and the first side opening From 5d, there can be an air flow A flowing into the passage formed between the arcuate outer periphery 5b and the rotating shaft 5c. This air flow A tries to pass through the passage from the first side opening 5d toward the second side opening 5f, but it collides with the ventilation blocking plate 5e provided in the middle of the passage and The flow will be hindered. As described above, the ventilation block 5f functions as an obstacle in the process of the air flow A passing through the rotary door 5A moving to the inside air intake 4 side, so that the outside air flows from the inside air intake 4 toward the vehicle interior. Can be prevented.

  As described above, in the air flow path switching device or the vehicle air conditioner 1 according to the present embodiment, the ventilation block plate 5e is in the middle of the path formed from the first side opening 5d toward the second side opening 5f. Is provided. According to this configuration, when the rotary door 5A is manufactured by a molding process using a mold, the degree of freedom of the mold structure is improved and the mold can be easily removed by providing the ventilation block 5e at an appropriate position. Productivity is improved.

  Further, the ventilation blocking plate 5e partitions a space formed between the arcuate outer peripheral portion 5b and the rotating shaft 5c into a space on the first side opening 5d side and a space on the second side opening 5f side. It is preferable. When this configuration is adopted, the space between the arcuate outer peripheral portion 5b formed on the inner side of the rotary door 5A and the rotating shaft 5c is divided into two, so that the air taken in from the air intake port 5A It is possible to completely shut off the flow that flows to the other air intake side via the inside of the.

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

  For example, the ventilation blocking plate 5a of the first embodiment is provided so as to close the second side portion 5a near the inside air intake 4, but is not limited thereto, and the first side near the outside air intake 3 is not limited thereto. The side opening 5d may be provided so as to be closed. In the case of adopting this configuration, the ventilation blocking plate is provided at a position close to the outside air inlet 3, so that the air taken in from the outside air inlet 3 is prevented from flowing into the door and the turbulence of the air flow due to the recirculation of the air. Can be reduced.

  Further, the ventilation blocking plate 5e of the second embodiment is provided at a substantially intermediate position between the first side opening 5d near the outside air intake 3 and the second side opening 5f near the inside air intake 4. However, the present invention is not limited to this, and the arrangement location is particularly limited as long as it is in a passage formed between the first side opening 5d and the second side opening 5f and prevents air flow. It is not a thing.

It is the schematic diagram which showed the internal structure of the vehicle air conditioner of 1st Embodiment of this invention. It is sectional drawing which showed the structure of the air flow path switching device in the vehicle air conditioner of 1st Embodiment. It is the perspective view which showed the structure of the rotary door in the air flow path switching device of 1st Embodiment. It is the top view which looked at the rotary door shown in FIG. 3 from the Z direction. It is the fragmentary sectional view which showed the structure of the rotary door in the airflow path switching apparatus of 2nd Embodiment.

Explanation of symbols

  2 ... Air-conditioning case, 3 ... Outside air inlet (first air inlet), 4 ... Inside air inlet (second air inlet), 5, 5A ... Rotary door (inside / outside air switching door), 5a ... Second side Directional part, ventilation blocking plate (ventilation blocking member), 5b ... arc-shaped outer peripheral part (substrate part), 5c ... rotating shaft, 5d ... first side opening (first side part), 5e ... ventilation blocking plate (Ventilation blocking member), 5f ... second side opening (second side portion), 6 ... inside / outside air switching box, 21 ... second seal portion, 22 ... third seal portion, 23 ... first seal portion A ... Air flow

Claims (7)

An air conditioning case (2) having a first air intake (3) and a second air intake (4), in which conditioned air flowing through the interior is blown into the vehicle interior;
A rotary door disposed in the air conditioning case (2) so as to be rotatable about a rotation shaft (5c) and switching between opening and closing of the first air intake (3) and the second air intake (4). (5, 5A)
The rotary door (5, 5A) has a shape extending in the direction of rotation thereof, and a substrate portion (5b) integrated with and connected to the rotary shaft (5c),
Forming a first side part (5d) and a second side part (5a, 5f) corresponding to a place connecting the rotating shaft (5c) and both ends of the substrate part (5b) in the rotational direction. And
The passage is formed in a passage between the substrate portion (5b) and the rotation shaft (5c) and extending from the first side portion (5d) to the second side portion (5a, 5f). An air flow passage switching device characterized in that an air flow blocking member (5a, 5e) is provided to block the air flow (A) about to pass through. The first air intake (3) is configured as an outside air intake (3), and the second air intake (4) is configured as an internal air intake (4).
The rotary door (5, 5A) is provided with a first seal portion (on the first side portion (5d) side) when switching between opening and closing of the outside air inlet (3) and the inside air inlet (4). 23), the outside seal inlet (3) is closed by the third seal part (22) provided on the second side part (5a, 5f) side, and the substrate part (5b),
The internal air inlet (4) is closed by a second seal part (21) provided on the second side part (5a, 5f) side and the ventilation blocking member (5a, 5e). Item 2. The air flow passage switching device according to Item 1.   The ventilation block member (5e) includes a space formed between the substrate portion (5b) and the rotation shaft (5c), a space on the first side portion (5d) side, and the second side. The air flow passage switching device according to claim 1 or 2, wherein the air flow passage switching device is partitioned into a space on the side portion (5f) side.   The air flow passage switching according to claim 1 or 2, wherein the ventilation block member (5a) is provided in the first side part (5d) or the second side part (5a). apparatus.   The length (R1) of the first side portion (5d) from the rotation shaft (5c) to the rotation direction end of the substrate portion (5b) is determined from the rotation shaft (5c) to the substrate portion. 5. The air flow according to claim 1, wherein the air flow is shorter than a length dimension (R <b> 2) of the second side part (5 a, 5 f) reaching the end part in the rotational direction of (5 b). Road switching device.   The length (L1) of the first side portion (5d) extending in the axial direction of the rotating shaft (5c) is the second side portion extending in the axial direction of the rotating shaft (5c). The air flow path switching device according to any one of claims 1 to 5, wherein the air flow path switching device is shorter than a length (L2) of (5a, 5f). The airflow path switching device according to any one of claims 1 to 6,
The rotary door (5, 5A) of the air flow path switching device is an inside / outside air switching door (5, 5A) disposed inside an inside / outside air switching box (6) provided in the air conditioning case (2). A vehicle air conditioner.

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