JP2021066400A - Vehicle air conditioning device - Google Patents

Abstract

To provide a vehicle air conditioning device which enables: opening and closing states of a plurality of opening sections to be switched with a single mode switching door; and air to be smoothly distributed at a desired blast volume without disturbing an air flow.SOLUTION: An air conditioning case 12 of a vehicle air conditioning device 10 has a mode switching door 20 which is rotatably arranged between a mixing section 42 and a blasting vent 22, a defroster vent 24 or a heated air vent 26. The mode switching door 20 is a rotary door which has: a rotation shaft 54 rotatably supported with respect to the air conditioning case 12; and a shield plate 58 which is separated from the rotation shaft 54 in a radial direction, extended along a rotation direction of the rotation shaft 54 and capable of shielding respective vents. The shield plate 58 has: a communication window 76 which enables air to be distributed in the radial direction; and an opening and closing door 82 which is installed on an inner periphery of the shield plate 58, allows the air to be distributed from an outside to an inside through the communication window 76 and prevents the air from flowing from the inside to the outside.SELECTED DRAWING: Figure 2

Description

The present invention relates to a vehicle air conditioner that is mounted on a vehicle and whose temperature is adjusted by a cooler and a heater to blow air to each air blowing point in the vehicle interior under the switching action of a mode switching door.

Conventionally, as disclosed in Patent Document 1, a vehicle air conditioner mounted on a vehicle has a rotary type so as to face the defroster opening, the center face opening, and the foot opening opened at the upper part of the case. The mode door is rotatably provided. Then, by rotating the mode door, one or a plurality of the defroster opening, the center face opening, and the foot opening can be selectively opened, and at the same time, the door plate portion can be closed.

With such a configuration, the driving force from the drive source is transmitted to each opening / closing door as compared with the case where a plurality of opening / closing doors are used to open / close the defroster opening, the center face opening, and the foot opening. It is said that the number of parts and the manufacturing cost can be reduced because the number of link mechanisms for opening and closing and the number of opening / closing doors themselves can be reduced.

JP-A-2017-170945

However, in the vehicle air conditioner according to Patent Document 1 described above, it is necessary to open and close a plurality of openings including a defroster opening, a center face opening, and a foot opening with one mode door. Therefore, there is a problem that it is difficult to arrange the door plate portion of the mode door at a desired position according to the ventilation mode. For example, in the defroster blowing mode in which warm air is blown from the defroster opening to the vicinity of the front window of the vehicle, a part of the door plate portion is arranged on the warm air passage through which the warm air flows. The flow of air is obstructed and the amount of air blown into the passenger compartment is reduced.

The present invention has been made in consideration of the above-mentioned problems, and a single mode switching door switches the open / closed state of a plurality of openings and smoothly distributes the air at a desired air flow without obstructing the air flow. It is an object of the present invention to provide an air conditioner for a vehicle which can be made to operate.

In order to achieve the above object, the embodiment of the present invention has an air conditioning case having an air flow passage inside, and a cooler and a heater provided in the air conditioning case, and the passage is a cooler. A cold air passage provided, a hot air passage arranged downstream of the cold air passage and provided with a heater, a bypass passage arranged downstream of the cold air passage and bypassing the heater, and downstream of the hot air passage and downstream of the bypass passage. In a vehicle air conditioner, which is composed of a mixing section where the air conditioners merge and has a plurality of openings that communicate the inside and the outside of the air conditioning case downstream of the mixing section.
A mode switching door is provided between the mixing portion and the opening to open and close the opening or the passage leading to the opening.
The mode switching door is radially separated from the rotating shaft, which is rotatably supported by the air conditioning case, and extends along the rotating direction of the rotating shaft, and is connected to an opening or an opening. A rotary door with a shielding surface that can block the passage.
A window through which air can flow is formed on the shielding surface, and the window allows air to flow from the outside of the mode switching door facing the opening or the passage leading to the opening to the inside facing the mixing part. , An opening / closing door is provided to block the flow of air from the inside to the outside.

According to the present invention, in an air conditioner case constituting a vehicle air conditioner, the air conditioner has a mixing portion where the downstream side of the hot air passage provided with the heater and the downstream side of the bypass passage bypassing the heater meet. A mode switching door that opens and closes the opening or the passage leading to the opening is provided between the plurality of openings that communicate the inside and the outside of the case and the mixing portion, and the mode switching door has a diameter with respect to the rotation axis. It has a shielding surface that can block the opening or the passage leading to the opening separated in the direction, and a window portion through which air can flow is formed on the shielding surface, and the mode switching door facing the opening portion There is an open / close door that allows the flow of air from the outside to the inside facing the mixing part and blocks the flow of air from the inside to the outside.

As a result, by rotating a single mode switching door, the open / closed state of a plurality of openings or passages connected to the openings can be switched by the shielding surface, and the shielding surface is provided on the passage through which air flows depending on the ventilation mode. Even when it is arranged, it is possible to blow air to the outside of the air conditioning case with a sufficient amount of air by circulating the air from the outside to the inside through the window portion. On the other hand, in the ventilation mode in which air flows inside the mode switching door, the air flow from the inside to the outside can be blocked by closing the window portion with the opening / closing door.

According to the present invention, the following effects can be obtained.

That is, a mode switching door that can open and close the opening or the passage leading to the opening is provided between the mixing portion and the passage connecting to the plurality of openings or the openings in the air conditioner case, and the mode switching door is a rotating shaft. A shielding surface that can block the opening or the passage leading to the opening is provided, and a window portion through which air can flow is formed on the shielding surface, and the mode switching door facing the opening is provided. The window is provided with an opening / closing door that allows the flow of air from the outside to the inside facing the mixing portion and blocks the flow of air from the inside to the outside.

Therefore, when the ventilation mode is switched under the rotational action of the mode switching door, in the ventilation mode in which the air flows from the mixing part side to the inside of the mode switching door, the flow to the outside through the window part is blocked by the opening / closing door. In the case of the ventilation mode in which the air flows from the outside to the inside of the mode switching door, the air flow to the inside is allowed by opening the open / close door and opening the window.

As a result, it is possible to switch the open / closed state of a plurality of openings by a single mode switching door, and even if a shielding surface is arranged on the passage through which the air flows, the air flow through the window is allowed. It is possible to blow air to the outside of the air conditioning case with a sufficient amount of air.

It is an overall sectional view of the air conditioner for vehicles which concerns on embodiment of this invention. FIG. 5 is an enlarged cross-sectional view showing the vicinity of a mode switching door in the vehicle air conditioner of FIG. 1. It is an external perspective view of the mode switching door shown in FIG. FIG. 5 is an overall cross-sectional view showing a ventilation mode in which air flows from the inner peripheral side to the outer peripheral side of the mode switching door in the vehicle air conditioner of FIG.

A preferred embodiment of the vehicle air conditioner according to the present invention will be described in detail below with reference to the accompanying drawings.

As shown in FIG. 1, the vehicle air conditioner 10 includes an air conditioner case 12 having air passages inside, and an evaporator (cooling) arranged inside the air conditioner case 12 to cool the air. The device) 14, the heater core (heater) 16 that heats the air, the slide door 18 that mixes the cold air and hot air that have been adjusted by the evaporator 14 and the heater core 16 at a predetermined mixing ratio, the cold air, and the cold air. The mode switching door 20 for switching the blowing state of the warm air to a desired location in the vehicle interior is included. The right side shown in FIG. 1 is the vehicle front side (arrow A1 direction) which is the engine side of the vehicle, and the left side is the vehicle rear side (arrow A2 direction) which is the vehicle interior side of the vehicle.

Above the air conditioner case 12 (in the direction of arrow B1), as shown in FIGS. 1 and 2, for example, a vent air outlet (opening) 22 that blows air near the face of an occupant and the vent air outlet 22 A defroster air outlet (opening) 24 that blows air is opened in the vicinity of the front window of the vehicle adjacent to the air conditioner. The vent air outlet 22 and the defroster air outlet 24 extend along the width direction of the air conditioning case 12 and are opened so as to be lined up in series along the front-rear direction (arrows A1 and A2 directions) of the vehicle.

Further, in the air conditioning case 12, on the vehicle rear side (arrow A2 direction) of the vent air outlet 22, a heat air vent (opening) 26 that blows air near the feet of the occupants is provided in the vehicle front-rear direction (arrows A1 and A2). It opens in the direction) and extends downward (in the direction of arrow B2).

Further, inside the air conditioning case 12, a first seal wall 28 formed between the vent air outlet 22 and the defroster air outlet 24, and a second seal wall 30 formed inside the defroster air port 24 A third seal wall 32 formed between the vent air outlet 22 and the heat air outlet 26, and a fourth seal wall 34 formed at the lower end of the heat air outlet 26 are provided.

Then, the mode switching door 20 for switching the air blowing state from the vent air vent 22, the defroster air port 24, and the heat air air port 26 rotates so as to face the first to fourth seal walls 28, 30, 32, 34. It is provided freely and can be slidably contacted with the first to fourth seal walls 28, 30, 32, and 34.

Furthermore, as shown in FIG. 1, inside the air conditioning case 12, a cold air passage 36 in which the evaporator 14 is arranged and a hot air passage 38 formed on the downstream side of the cold air passage 36 and in which the heater core 16 is arranged are arranged. A bypass passage 40 that bypasses the heater core 16 is formed on the downstream side of the cold air passage 36, and a mixing portion 42 that joins the downstream side of the warm air passage 38 and the downstream side of the bypass passage 40 is formed. It is formed.

Then, inside the air conditioning case 12, an evaporator 14 is provided at a position on the front side of the vehicle (direction of arrow A1), and is separated from the evaporator 14 at a position on the rear side of the vehicle (direction of arrow A2) at a predetermined interval. A heater core 16 is provided. The evaporator 14 is provided so as to be on the upstream side in the air flow direction and the heater core 16 is on the downstream side, and an air introduction port 44 to which air from a blower (not shown) is supplied is opened on the upstream side of the evaporator 14. ing.

Further, between the evaporator 14 and the heater core 16, a slide door 18 for adjusting the flow amount and the flow state of the air cooled by the evaporator 14 to the heater core 16 side is provided.

The slide door 18 is formed, for example, in a circular arc shape with a gently curved cross section so as to be convex toward the heater core 16 side (arrow A2 direction) on the downstream side, and is formed in a plate shape along the width direction of the air conditioning case 12. At the same time, it is slidably provided in the vertical direction (arrows B1 and B2 directions) inside the air conditioning case 12. The slide door 18 is provided with seal members 46a and 46b at the upper end and the lower end along the slide direction, respectively.

A rack groove 48 is formed on the inner wall surface of the slide door 18 on the evaporator 14 side, and a pinion gear 52 of a shaft 50 pivotally supported by the air conditioning case 12 is meshed with the rack groove 48.

Then, the shaft 50 rotates in a predetermined direction by a predetermined amount under the driving action of a drive source (not shown) provided on the outside of the air conditioning case 12, so that the slide door 18 slides in the vertical direction (arrows B1 and B2 directions). For example, when the slide door 18 moves upward (in the direction of arrow B1), the upstream side of the heater core 16 becomes an open position as shown in FIG. 1, while the slide door 18 moves downward (arrow). By moving in the B2 direction), as shown in FIG. 4, the upstream side of the heater core 16 is covered and the communication with the evaporator 14 side is cut off.

As shown in FIGS. 1 to 4, the mode switching door 20 is formed in a semi-cylindrical shape having a semicircular cross section and a predetermined length in the axial direction (in the direction of arrow C in FIG. 3) for air conditioning. A pair of rotating shafts 54 supported by the widthwise side walls of the case 12, a pair of door side plates 56a and 56b extending radially outward with respect to the rotating shaft 54, and a radial direction with respect to the rotating shaft 54. It is a rotary door provided with a shielding plate (shielding surface) 58 which is separated from the outside by a predetermined distance and both ends in the width direction are connected to the door side plates 56a and 56b, respectively.

The rotary shaft 54 is inserted into a hole (not shown) opened in the side wall in the width direction of the air conditioning case 12, and a rotary drive source 60 such as an actuator is connected to the tip of the air conditioning case 12 projecting to the outside.

The door side plates 56a and 56b are made of, for example, plate materials formed in a semicircular cross section, are connected so that the rotating shafts 54 are substantially orthogonal to each other, and are formed in an arc shape having a predetermined radius around the rotating shaft 54. It has the first and second outer edge portions 62 and 64, and a straight edge portion 66 that linearly connects the end portions of the first outer edge portion 62 facing each other and the end portions of the second outer edge portion 64. ing. That is, the first outer edge portion 62 and the second outer edge portion 64 are formed with the straight edge portion 66 in between. In other words, the straight edge portion 66 is formed so that a part of the outer edge portions of the door side plates 56a and 56b formed in an arcuate cross section is cut out.

The shielding plate 58 is formed in an arcuate cross section and is connected to a first shielding portion 68 connected to the first outer edge portion 62 of the door side plates 56a and 56b and a second outer edge portion 64 of the door side plates 56a and 56b. It has a second shielding portion 70, and an opening 72 penetrating from the outer peripheral surface to the inner peripheral surface of the shielding plate 58 is formed between the first shielding portion 68 and the second shielding portion 70. ..

The first and second shielding portions 68 and 70 are formed so as to have the same peripheral surface about the rotation shaft 54. Further, the opening 72 is formed so as to face the straight edge portions 66 of the door side plates 56a and 56b, and has a substantially rectangular shape from one door side plate 56a to the other door side plate 56b along the axial direction of the mode switching door 20. It is open to the door.

The first shielding portion 68 connects the first outer edge portion 62 of the one door side plate 56a and the first outer edge portion 62 of the other door side plate 56b, and the second shielding portion 70 connects the second outer edge portion 62 of the one door side plate 56a. The outer edge portion 64 and the second outer edge portion 64 of the other door side plate 56b are connected, and are connected to the outer peripheral sides of the first and second outer edge portions 62 and 64 of the door side plates 56a and 56b, respectively. Further, when the mode switching door 20 shown in FIG. 2 is viewed from the direction of the rotation shaft 54, the circumferential length of the first shielding portion 68 is formed to be longer than the circumferential length of the second shielding portion 70.

Further, on the outer peripheral surface of the first shielding portion 68, for example, a sheet-shaped first sealing member 74 formed of a compressible elastic material such as urethane foam to a certain thickness is completely attached to the outer peripheral surface by an adhesive or the like. Has been done.

The second shielding portion 70 is formed with a communication window (window portion) 76 penetrating in the radial direction from the outer peripheral surface to the inner peripheral surface thereof. The communication window 76 is formed, for example, in a substantially rectangular shape that is long along the axial direction of the mode switching door 20 (in the direction of arrow C in FIG. 3), and both ends in the width direction of the second shielding portion 70. Each end in the width direction is formed inside in the width direction, and one end 70a in the circumferential direction is on the opening 72 side in the circumferential direction of the second shielding portion 70, and the other end 70b in the circumferential direction is on the opposite side to the opening 72. It is formed at a position on the inner side in the circumferential direction (see FIG. 2).

Further, on the outer peripheral surface of the second shielding portion 70, for example, a sheet-shaped second sealing member 78 formed of a compressible elastic material such as urethane foam to a certain thickness is completely attached to the outer peripheral surface by an adhesive or the like. Will be done. The second seal member 78 is formed to have substantially the same thickness as the first seal member 74 attached to the first shield portion 68, and has a seal hole portion (a seal hole portion) opened at a position facing the communication window 76 in the same shape. Window portion) 80 is formed.

That is, the seal hole portion 80 is opened in a substantially rectangular shape having substantially the same area as the communication window 76, and the seal hole portion 80 and the communication window 76 are on the inner peripheral side and the outer peripheral side of the second shielding portion 70. Functions as a window that can communicate with.

Further, an opening / closing door 82 capable of opening / closing the communication window 76 is provided on the inner peripheral surface of the second shielding portion 70, and the opening / closing door 82 has, for example, a rectangular cross section and is made of an elastic material such as hard rubber or a film. It is formed in a substantially rectangular shape having an area larger than the opening area of the communication window 76.

Further, the opening / closing door 82 has a mounting portion 86 fixed via a fixing member 84 in the vicinity of one end in the circumferential direction on the opening 72 side in the second shielding portion 70, and a shut portion that is flexible with respect to the mounting portion 86. Includes 88 and. The opening / closing door 82 is arranged so that the shut portion 88 extends in the direction opposite to the opening 72 side with respect to the mounting portion 86, and the width direction of the second shielding portion 70 (arrow in FIG. 3). The mounting portion 86 is sandwiched between the inner peripheral surface of the second shielding portion 70 via a long plate-shaped pressing member 90 along the C direction), and a plurality of fixing members are sandwiched via the pressing member 90. It is fixed at 84.

As a result, in the opening / closing door 82, the shut portion 88 is provided on the circumferential direction other end 70b side with respect to the mounting portion 86 provided on the circumferential direction one end 70a side on the inner peripheral surface of the second shielding portion 70, and the communication window 76 is provided. It becomes possible to cover. In other words, the opening / closing door 82 has a cantilever structure that is held by only the mounting portion 86 with respect to the inner peripheral surface of the second shielding portion 70, the shut portion 88 is not fixed at all, and is flexible.

Then, in the mode switching door 20 described above, the driving force from the rotary drive source 60 provided on the outside of the air conditioning case 12 is transmitted to the rotary shaft 54, so that the door side plate 56a, inside the air conditioning case 12, The 56b and the shielding plate 58 are integrally rotated by a predetermined amount.

The vehicle air conditioner 10 according to the embodiment of the present invention is basically configured as described above, and its operation and action / effect will be described next.

First, the case of the vent mode in which cold air is blown to the vicinity of the occupant's face in the vehicle interior will be described with reference to FIG.

When the slide door 18 descends under the driving action of a drive source (not shown), the upstream side of the heater core 16 is covered and the communication with the downstream side of the evaporator 14 is cut off, and the cold air passage 36 and the bypass passage 40 communicate with each other. It will be in the state of.

Further, the mode switching door 20 rotates clockwise by a predetermined amount from the state shown in FIG. 1, and the first seal member 74 of the first shielding portion 68 comes into contact with the first and second seal walls 28 and 30. The defroster blower port 24 is covered, and the second seal member 78 of the second shielding portion 70 comes into contact with the third and fourth seal walls 32 and 34 to cover the heat blower port 26. On the other hand, the vent air outlet 22 is in an open state communicating with the mixing portion 42 through an opening 72 opened between the first shielding portion 68 and the second shielding portion 70.

Then, the air supplied from the blower (not shown) into the air conditioning case 12 through the air introduction port 44 becomes cold air by passing through the evaporator 14, and is upward (in the direction of arrow B1) through the bypass passage 40 so as to bypass the heater core 16. It flows to the mixing section 42. After that, the cold air flows from the mixing unit 42 to the inside of the mode switching door 20, and is blown from the vent air outlet 22 to the vicinity of the occupant's face in the vehicle interior through the opening 72.

Further, the opening / closing door 82 is pressed against the inner peripheral surface of the second shielding portion 70 by the air (cold air) flowing into the mode switching door 20, so that the outer edge portion of the shut portion 88 is pressed against the inner peripheral surface. The communication window 76 is securely closed in close contact with the air. As a result, the flow of cold air through the communication window 76 to the heat air outlet 26 side facing the second shielding portion 70 is surely blocked.

Next, the case of the defroster mode in which warm air is blown to the vicinity of the front window in the vehicle interior through the defroster air outlet 24 will be described with reference to FIGS. 1 and 2.

First, when the slide door 18 rises under the driving action of a drive source (not shown), the upstream side of the heater core 16 is opened and the evaporator 14 and the heater core 16 communicate with each other. It is in a state of communicating with 38.

Further, the mode switching door 20 rotates counterclockwise from the state of the vent mode shown in FIG. 4, and the first seal member 74 of the first shielding portion 68 has the first, third and fourth seal walls 28, 32. , 34 is in contact with the vent air outlet 22 and the heat air outlet 26, and a part of the second shielding portion 70 and the opening 72 is arranged so as to face the warm air passage 38 on the downstream side of the heater core 16. On the other hand, the defroster air outlet 24 is opened by moving the first shielding portion 68 so as to be separated from the second seal wall 30.

Then, the air supplied from the blower (not shown) into the air conditioning case 12 through the air introduction port 44 is heated by passing through the heater core 16 after passing through the evaporator 14 and being cooled, and becomes warm air along the warm air passage 38. Flows.

As shown in FIG. 2, this warm air rises along the warm air passage 38 on the downstream side of the heater core 16 and flows inward through the opening 72 of the mode switching door 20 and seals the second shielding portion 70. By flowing into the hole portion 80 and the communication window 76, the shut portion 88 of the opening / closing door 82 is flexed so as to be separated from the inner peripheral surface with the mounting portion 86 as a base point.

As a result, the warm air flowing upward along the warm air passage 38 flows from the outside to the inside through the opening 72 of the mode switching door 20, and at the same time, flows inward through the communication window 76, and the mode switching door 20 of the mode switching door 20. It flows through the inside to the defroster air outlet 24 and is blown to the vicinity of the front window of the vehicle.

That is, in the defroster mode, even if the second shielding portion 70 of the mode switching door 20 is arranged on the warm air passage 38 on the downstream side of the heater core 16, the communication window 76 opened in the second shielding portion 70 is provided. By opening the door, warm air can be circulated to the downstream side through the communication window 76.

Further, in the case of the heat mode in which warm air is blown to the vicinity of the feet of the occupants in the vehicle interior, the slide door 18 rises as in the case of the defroster mode described above, and the mode switching door 20 is the first shielding portion 68. The first seal member 74 of the above abuts on the first to third seal walls 28, 30, 32 to cover the vent air outlet 22 and the defroster air outlet 24. Further, the mode switching door 20 is at a position where the second seal member 78 of the second shielding portion 70 is in contact with the fourth seal wall 34 and the opening 72 is in contact with the heat air outlet 26.

Then, the warm air heated by passing through the heater core 16 in the air conditioning case 12 flows from the mixing unit 42 to the inside of the mode switching door 20 along the warm air passage 38, and then flows to the outside through the opening 72. By blowing air to the heat air outlet 26, the air is supplied to the vicinity of the feet of the occupants in the vehicle interior.

At this time, the opening / closing door 82 is in a state in which the shut portion 88 is pressed against the inner peripheral surface of the second shielding portion 70 by the warm air supplied to the inner peripheral side of the shielding plate 58 to shield the communication window 76. Therefore, the warm air introduced inside the mode switching door 20 does not leak to the outer peripheral side through the communication window 76.

As described above, in the present embodiment, the air conditioner case 12 constituting the vehicle air conditioner 10 faces the vent blower port 22, the defroster blower port 24, and the heat blower port 26, and faces the vent blower port 22, the defroster blower, and the defroster blower. A mode switching door 20 capable of switching the open / closed state of the port 24 and the heat blower port 26 is provided, and the mode switching door 20 is a rotary door having a rotating shaft 54 rotatably supported with respect to the air conditioner case 12. A shielding plate 58 is provided on the outside of the rotating shaft 54 by a predetermined distance and both ends in the width direction are connected to the door side plates 56a and 56b, respectively.

Then, the shielding plate 58 is formed with a communication window 76 that penetrates in the radial direction and enables air to flow between the outer peripheral side and the inner peripheral side, and the inner peripheral surface of the shielding plate 58 is described as described above. An opening / closing door 82 is provided for allowing the air to flow from the outer peripheral side to the inner peripheral side through the communication window 76 and blocking the flow of the air from the inner peripheral side to the outer peripheral side.

Therefore, for example, when air flows from the mixing portion 42 side, which is the upstream side, to the inner peripheral side of the mode switching door 20 under the driving action of the mode switching door 20, as in the vent mode, the opening / closing door 82 Is pressed toward the inner peripheral surface side of the shielding plate 58 by the air flow to be in close contact with the shield plate 58, so that the communication window 76 is surely closed by the opening / closing door 82, and the air from the communication window 76 to the outer peripheral side. The flow is cut off, and the air can be circulated only through the opening 72 to the vent air outlet 22 arranged on the outer peripheral side.

On the other hand, when air flows from the warm air passage 38 toward the outer peripheral side of the mode switching door 20 as in the defroster mode, the opening / closing door 82 is pressed inward by the air flowing through the communication window 76 to open. Therefore, in addition to the opening 72 of the mode switching door 20, air can be circulated to the inner peripheral side through the communication window 76.

As a result, the open / closed state of the vent blower port 22, the defroster blower port 24, and the heat blower port 26 can be switched by the single mode switching door 20, and the blower mode can be switched, for example, on the warm air passage 38. Even if the shielding plate 58 is arranged, the air can be smoothly circulated from the outer peripheral side to the inner peripheral side of the mode switching door 20 through the communication window 76, so that the ventilation may be hindered. It is preferably avoided and can be blown into the vehicle interior with a desired amount of air.

It should be noted that the vehicle air conditioner according to the present invention is not limited to the above-described embodiment, and of course, various configurations can be adopted without deviating from the gist of the present invention.

10 ... Vehicle air conditioner 12 ... Air conditioner case 20 ... Mode switching door 22 ... Vent air outlet 24 ... Defroster air outlet 26 ... Heat air outlet 36 ... Cold air passage 38 ... Hot air passage 42 ... Mixing part 58 ... Shielding plate 68 ... No. 1 Shielding part 70 ... 2nd Shielding part 72 ... Opening 76 ... Communication window 82 ... Opening / closing door 84 ... Fixing member

Claims (1)

It has an air-conditioning case having an air flow passage inside, and a cooler and a heater provided in the air-conditioning case, and the passages are downstream of the cold air passage provided with the cooler and the cold air passage. A hot air passage arranged and provided with the heater, a bypass passage arranged downstream of the cold air passage and bypassing the heater, and a mixing portion where the downstream of the hot air passage and the downstream of the bypass passage merge. In a vehicle air conditioner having a plurality of openings for communicating the inside and the outside of the air conditioner case downstream of the mixing portion.
A mode switching door for opening and closing the opening or the passage connected to the opening is provided between the mixing portion and the opening.
The mode switching door extends radially along the rotation direction of the rotation shaft while being radially separated from the rotation shaft rotatably supported by the air conditioning case, and the opening. Alternatively, it is a rotary door having a shielding surface that can block the passage leading to the opening.
A window portion through which the air can flow is formed on the shielding surface, and the window portion faces the opening or a passage leading to the opening from the outside of the mode switching door to the inside facing the mixing portion. An air conditioner for a vehicle provided with an opening / closing door that allows the flow of the air and blocks the flow of the air from the inside to the outside.

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