JP2016159751A - Air conditioner for vehicle preventing noise occurrence - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner for a vehicle in which a blower is arranged to be eccentric from an outside air introducing opening, capable of preventing an inside air that flows a gap between an intake case and an intake door from generating a wind noise during an inside/outside air mixing mode.SOLUTION: An air conditioner 1 for a vehicle is provided with air flow deceleration means which controls a gap between an intake door 1-4 of an inside/outside air switching part 2 and an intake case 1-5, so that air flows 4, 5 passing the gap is decelerated to prevent noise.SELECTED DRAWING: Figure 1

Description

The present invention relates to a vehicle air conditioner that prevents generation of noise. More specifically, in a vehicle air conditioner in which the inside and outside air taken in is temperature-controlled by a blower and is sent into the room, an intake case in which an intake door for switching the inside and outside air is connected to the blower, the outside air introduction port, and the inside air suction port It is related with the vehicle air conditioner which prevented the noise which generate | occur | produces when it is enclosed and is arranged eccentrically with respect to an external air inlet.

Air conditioners for vehicles with a temperature control function that mixes air from heaters and coolers became common in the 1980s, and now there is no vibration or noise, not only making a comfortable car interior comfortable, but also fogging windows It is an indispensable device for safety.

In recent years, emphasis has been placed on securing a space in an automobile interior, and downsizing of an air conditioner is strongly desired. One example is a vertically installed integrated air conditioner that is mounted on a center console portion of a vehicle and in which temperature adjusting means such as a heat exchanger for cooling is disposed below the blower (Patent Document 1).

Thus, in order to install an air conditioner in a restricted space, it is necessary to downsize the blower or narrow the air passage, and the turbulent flow and air separation caused by the decrease in air volume and the increase in ventilation resistance The problem of noise due to the phenomenon occurs. Further, conventionally, in a casing containing a heat exchanger, the blower is often arranged eccentrically on the passenger seat side, and from the viewpoint of expanding the space at the feet of the passenger seat, the vehicle height direction and the vehicle longitudinal direction are small. (Non-Patent Document 1).

Therefore, as a vehicle air conditioner that achieves both miniaturization and noise reduction, optimization of the blade shape and the scroll shape has been achieved from the viewpoint of a blower (Non-Patent Document 1). On the other hand, from the viewpoint of reducing the airflow resistance inside the air conditioner, noise prevention structures such as dimples and ribs are provided to suppress turbulent flow and air separation, thereby preventing noise (Patent Literature). 2).

JP 2003-34114 A JP 2006-151068 A

Masaharu Sakai et al., “Lowering the noise of blowers for vehicle air conditioning”, Denso Technical Review, Vol. 10, no. 1 (2005) pp. 71-77

However, in the case of a vehicle air conditioner in which the above-described blower is eccentrically arranged on the passenger seat side or the driver seat side, there is a problem that noise that cannot be solved only by the blade shape and scroll shape of the blower is generated. In addition, although noise prevention structures such as dimples and ribs have the effect of suppressing turbulence and air separation, there is a problem that noise cannot be prevented unless properly installed.

  As a result of examining the above-mentioned problems, the present inventors have found that there is a high possibility that a wind noise passing through the gap between the intake door and the intake case in the inside / outside air switching unit that mixes the inside air and the outside air is the cause. . That is, since the blower is eccentric to the passenger seat side (or to the driver seat side), the path from the outside air to the blower meanders. Then, in the outside air introduction mode in which the intake door takes in the outside air (outside air introduction position), or in the inside / outside air mixing mode in the position where the mixed air of the inside air and outside air is taken in (inside / outside air mixing position), The outside air that flows inside the intake door does not flow uniformly due to the meandering path, and a space that is excessively decompressed is formed. In order to eliminate the excessively decompressed space, part of the inside air that is originally sucked into the blower passes through the gap between the intake door and the intake case while generating a wind noise in the inside / outside air mixing mode. It flows into an excessively decompressed space. Accordingly, an object of the present invention is to provide a vehicle air conditioner that prevents noise caused by wind noise that passes through a gap between an intake door and an intake case.

  More specifically, as shown in FIGS. 1, 2, and 3, the blower (1-6) in which the motor and the fan are arranged, the temperature control means (not visible from the outside), and a pair of doors Door connecting part (1-4-1 and 2) including connecting edge (1-4-4 and 5) and door peripheral wall part (1-4-3) including door peripheral edge (1-4-6) Intake door (1-4) including the intake door (1-4), and the rotation axis of the intake door (1-4) with respect to the central axis (A) of the blower (1-6) ( Side air inlet (1-2) in a vehicle air conditioner comprising an intake case (1-5) having an outside air inlet (1-1) arranged eccentrically in the direction of 1-4-7 and 8) A first door connecting portion (1-4-1) including a first door connecting edge (1-4-4) of a side intake door (1-4); A vehicle air conditioner that prevents noise due to wind noise passing through a gap between the take-case (1-5) and the first case side wall (1-5-1) on the side air inlet (1-2) side of the take case (1-5) The purpose is to provide.

In order to solve the above-described problems, the vehicle air conditioner of the present invention has the first door connecting edge (1-4-4) of the intake door (1-4) on the side air inlet (1-2) side. Between the first door connecting portion (1-4-1) including the first case side wall (1-5-1) on the side air intake port (1-2) side of the intake case (1-5) Ventilation speed reduction means for reducing the wind speed of the air passing through is provided.

  Although the said ventilation reduction means is not limited, Taking the manufacturing cost, the noise prevention effect, etc. into consideration, the following means are preferable, for example.

First, the first door connecting portion (1-4-) including the first door connecting edge portion (1-4-4) of the intake door (1-4) on the side air intake port (1-2) side. This is a method of widening the minimum distance between 1) and the first case side wall (1-5-1) on the side air intake port (1-2) side of the intake case (1-5).

  Specifically, the above interval is the first interval (7), and the other is paired with the first door connecting portion (1-4-1) including the first door connecting edge portion (1-4-4). The second door connecting part (1-4-2) including the second door connecting edge part (1-4-5) and the other paired with the first case side wall part (1-5-1) If the minimum distance from the second case side wall (1-5-2) is the second distance (8), the first distance (7) is larger than the second distance. The first interval (7) is preferably about 1.2 to 3.0 times the second interval (8). More preferably, the first interval (7) is approximately 1.5 times larger than the second interval (8).

Further, the minimum distance between the door peripheral wall portion (1-4-3) including the door peripheral wall edge portion (1-4-6) and the case peripheral wall (1-5-3) is a third interval (not shown). Then, it is the method of arrange | positioning so that a 1st space | interval (7) may become larger than a 3rd space | interval (a figure is abbreviate | omitted), and a 1st space | interval (7) is the 1.2th of the 3rd space | interval (a figure abbreviate | omitted). It is preferable that it is a dimension of -3.0 times. More preferably, the first interval (7) is approximately 1.5 times larger than the third interval (not shown).

More specifically, since the conventional first interval (7), second interval (8), and third interval (not shown) are substantially equal and less than 2 mm, noise due to wind noise is severe. The first interval is preferably 2 mm or more, more preferably 2.2 mm or more, and even more preferably 2.5 mm or more. However, if the interval is too wide, the vehicle air conditioner of the present invention, which is to secure the space in the automobile interior, cannot be reduced in size, so the interval must be as narrow as possible, and at most 5 mm or less. It is preferable to do.

As a second mode of the ventilation speed reducing means, in the shape of the conventional intake door (1-4), the first door connecting portion (1-4-1) of the intake door (1-4) and the door peripheral wall portion ( This is a method of removing the corners formed by 1-4-3). By removing the corner, the flow (4-1) of the inside air (4) sucked into the intake door (1-4) and the flow (3-1) of the introduced outside air (3) are changed into the intake door. (1-4) is not particularly limited as long as it is ventilated in the direction of the blower (1-6), but from the door peripheral wall (1-4-3) to the first door connecting portion (1-4-1) ) To form a gentle curved surface. The flow (3-1) of the outside air (3) smoothly flows into the intake door (1-4), prevents formation of an excessively decompressed space, and prevents noise due to wind noise. The gentle curved surface may be spherical or radial, and is not particularly limited.

The method of forming the gently curved surface, which is the second mode of the ventilation speed reducing means, is not particularly limited, but the door peripheral wall portion (1-4-3) of the conventional intake door (1-4) and A corner portion formed over one door connecting portion (1-4-1) may be embedded, or a recess may be formed. When producing specifically, when producing a plastic intake door, it is preferable to design and manufacture a desired mold so that a gentle curved surface can be obtained, and continuously injection-mold.

Of the above, when the method of forming the depression is adopted, the first door connecting portion (1-4-4) including the first door connecting edge portion (1-4-4) is obtained by removing the corner portion. 1) and the first case side wall (1-5-1) increase in size, the air flow (6) is decelerated, and the outside air (3) is introduced into the intake door (1-4). The effect of preventing noise is further exerted by a synergistic effect with the effect of smoothly flowing the flow (3-1).

The third mode of the ventilation speed reduction means is the first door connecting portion (1-4-1) including the first door connecting edge (1-4-4) in the conventional intake door (1-4). And / or a ventilation resistance increasing element on at least a part of the outside of the door peripheral wall portion (1-4-3) including the door peripheral wall edge portion (1-4-6). Similarly, the airflow resistance increasing element is disposed on at least a part of the inside of the first case side wall (1-5-1) and / or the inside of the case peripheral wall (1-5-3). . Such a ventilation resistance increasing element may be disposed only on one of the intake door and the intake case, but is preferably disposed on both sides of the intake door and the intake case. In addition, it is preferable that the arrangement location is as small as possible in the manufacture of the intake door and the intake case, and includes the first door connecting edge (1-4-4) of the conventional intake door (1-4). Most preferably, a ventilation resistance increasing element is disposed on at least a part of the outside of the first door connecting portion (1-4-1) and / or the inside of the first case side wall (1-5-1).

Further, the ventilation resistance increasing element which is the third aspect of the ventilation speed reducing means is not limited as long as it can prevent the turbulent flow and the air separation phenomenon. For example, the following can be mentioned. In this method, dimples and cylindrical ribs formed on a golf ball or the like are provided as a minimum. Further, it is a method in which protrusions having a triangular or quadrangular cross section are provided in parallel in a direction substantially perpendicular to the ventilation direction. Specifically, when producing the plastic intake door (1-4) and the intake case (1-5), design and manufacture a desired mold so as to obtain the above-mentioned ventilation resistance increasing element. It is preferable to perform injection molding continuously.

  According to the present invention, the increase in the number of vehicle air conditioners in which the blower is eccentrically arranged on the passenger seat side or on the driver seat side causes a gap between the intake door and the intake case of the inside / outside air switching unit that mixes the inside and outside air. Therefore, it is possible to reduce the size and noise of the vehicle air conditioner, which could not be solved by the prior art alone.

It is an external view of the vehicle air conditioner of the present invention. It is an enlarged view of the inside / outside air switching part of the vehicle air conditioner of the present invention. It is a typical example of the conventional intake door enclosed in an intake case. It is the schematic diagram of the cross section of the inside / outside air switching part which showed the space | interval of the conventional intake door and an intake case. It is the schematic diagram of the cross section of the inside / outside air switching part which showed the ventilation reduction means which controls the space | interval of the intake door and intake case of this invention. It is the schematic diagram of the cross section of the inside / outside air switching part which showed the ventilation reduction means which controls the shape of the entrance corner part of the intake door of this invention. It is an external view of the intake door of FIG. It is the schematic diagram of the cross section of the inside / outside air switching part which showed the ventilation reduction means which controls the shape of the entrance corner part of the intake door of this invention. It is an external view of the intake door of FIG. It is the model of the cross section of the inside / outside switching part showing the ventilation speed reduction means provided with the ventilation resistance increasing element of the present invention. It is a typical example of the shape of the ventilation resistance increasing element of FIG.

  Hereinafter, the subject of the conventional vehicle air conditioner and the embodiment of the present invention which improved it are described using a drawing.

First, the problem of the conventional vehicle air conditioner will be described in detail with reference to FIGS. FIG. 1 is an external view of a conventional air conditioner for a vehicle according to the present invention. As can be seen from the figure, the main parts of the conventional and the vehicle air conditioner of the present invention are the blower (1-6) in which the motor and the fan are arranged, the cooling heat exchanger, the heating heat exchanger, etc. Temperature control means (not shown) and an intake door (1-4) having a rotating shaft in the horizontal direction of the paper surface, and the outside air inlet (1-1) and the inside / outside air switching part (2) are connected. The intake case (1-5) includes a pair of case side walls (1-5-1 and 1-5-2) and a case peripheral wall (1-5-3). And have. The vehicle air conditioner is characterized in that the outside air inlet (1-1) is eccentric in the direction of the rotation axis of the intake door with respect to the central axis (A) of the blower. In the case of FIG. 1, the front side of the paper is in the direction of travel of the vehicle, and the blower (1-6) is eccentric on the passenger seat side in the case of a right-hand drive vehicle, thereby ensuring space in the vehicle interior and the vehicle. Although the purpose is to adapt to the structure, the downsizing of the vehicle air conditioner has a problem that it easily leads to noise and a reduction in the air volume.

FIG. 2 is an enlarged view of the inside / outside air switching unit (2) that is in a position where noise is generated due to the positional relationship between the blower (1-6) and the outside air introduction port (1-1). Moreover, the intake door (1-4) included in the intake case (1-5) is shown in FIG. FIG. 4 is a cross-sectional view taken along the cutting line (B) and cut substantially horizontally on the paper surface. 2 and FIG. 4, the intake door (1-4) is in the position of mixing the inside and outside air, and the blower (1-6) can suck the outside air (3) and the inside air (4). The same applies to FIGS. 5, 6, 8, and 10 described later.

As can be seen from these figures, the inside / outside air switching section (2) simultaneously receives the inside air (4 and 5) from the side inside air suction port (1-2) and the peripheral surface inside air suction port (1-3). The outside air (3) is introduced from the outside air introduction port (1-1) and flows into the intake door (1-4) (3-1, 4-1). Here, the interior of the intake door (1-4) includes the first door connecting portion (1-4-1) including the first door connecting edge (1-4-4) and the door peripheral wall portion (1-4). -3), the flow (3-1) of the outside air does not sufficiently reach the corners formed by (3) and the pressure drops excessively. For this reason, in order to eliminate the excessive pressure drop, a part of the inside air flows through the gap between the intake door (1-4) and the intake case (1-5) (6), generating wind noise, The present inventors have found that it is a cause of noise.

Therefore, the gap between the conventional intake door (1-4) and the intake case (1-5) was investigated. As a result, the first door connection portion (1-4-1) including the first door connection edge portion (1-4-4) and the first case side wall portion (1-5-1) are formed. 1 interval (7) and second interval (8) formed by the intake door peripheral wall portion (1-4-3) including the door peripheral wall edge (1-4-6) and the case peripheral wall (1-5-3) And a second door connecting portion (1-4-2) including the second door connecting edge (1-4-5) and a second case side wall (1-5-2) The interval (the figure is omitted) is substantially equal, and it has been found that this is the cause of wind noise, and the present invention has been achieved.

That is, the first door connection portion (1-4-1) including the first door connection edge portion (1-4-4) and the first case side wall portion (1-5-1) make the first. It is preferable to provide a means for decelerating the air flow (6) passing through the interval (7), and more preferably, at the same time, the outside air flow (3-1) can smoothly flow inside the intake door (1-4). It is to provide a means to lead to.

Next, a specific method for solving the problem will be described with reference to the drawings. However, the method is a representative example, and the method is not limited thereto as long as the method is based on the technical idea.

FIG. 5 shows that the first door connection part (1-4-1) including the first door connection edge part (1-4-4) and the first case side wall part (1-5-1) are formed. This is an aspect of the ventilation speed reduction means for controlling the first interval (7). The first interval (7) is the second interval (8) formed by the door peripheral wall portion (1-4-3) including the door peripheral wall edge (1-4-6) and the case peripheral wall (1-5-3). And a second door connecting portion (1-4-2) including the second door connecting edge (1-4-5) and a second case side wall (1-5-2) It is one aspect | mode of the ventilation speed reduction means characterized by arrange | positioning so that it may become larger than a space | interval (a figure is abbreviate | omitted). In one aspect of the ventilation speed reduction means, the first interval (7) is more preferably 1.2 to 3.0 times the second interval (8) and the third interval (not shown). More preferably, the first interval is approximately 1.5 times the second interval. More specifically, the first interval (7) is preferably 2 mm or more, more preferably 2.2 mm or more, and even more preferably 2.5 mm or more.

Here, the first interval (7) in FIG. 5 is formed by the first door connecting edge (1-4-4) and the first case side wall (1-5-1). The second interval (8) of 5 is formed by the door peripheral wall edge (1-4-6) and the case peripheral wall (1-5-3). As shown in FIG. 3, the first door connecting edge (1-4-4) protrudes from the first door connecting part (1-4-1), and the door peripheral wall edge (1-4) -6) shows a case where it protrudes from the door peripheral wall (1-4-3). However, the first door connecting edge (1-4-4) and the first door connecting part (1-4-1) are on the same plane, and the door peripheral wall edge (1-4-6) In the case where the door peripheral wall portion (1-4-3) is on the same plane, the same applies to the third interval (not shown). That is, the location of the first interval (7), the second interval (8), and the third interval (not shown) varies depending on the shape of the intake door (1-4) and the intake case (1-5). Intake door (1) formed by the first door connecting part (1-4-1) including the first door connecting edge part (1-4-4) and the first case side wall part (1-5-1) -4) and the minimum distance between the intake case (1-5). Based on this definition, the first interval (7) is arranged to be larger than the second interval (8) and the third interval, and the first interval (7) is the second interval (8). ) And the third interval is preferably about 1.2 to 3.0 times larger. More preferably, the first interval (7) is approximately 1.5 times larger than the second interval (8) and the third interval.

Next, FIGS. 6 and 7 show an embodiment of the present invention characterized by providing a means for smoothly guiding the flow (3-1) of the outside air to the inside of the intake door (1-4), that is, a gentle curved surface. It is a 2nd aspect. FIG. 6 is a cross-sectional view showing an example in which a corner portion formed between the first door connecting portion (1-4-1) and the door peripheral wall portion (1-4-3) is embedded. The appearance of such an intake door (1-4-a) is shown in FIG.

FIGS. 8 and 9 show a means for smoothly guiding the flow of the outside air (3-1) to the inside of the intake door by providing a gentle curved surface, and the speed of the air flow (6) passing through the first interval (7). It is an example of the intake door (1-4-b) which produces a synergistic effect with the means to do. As shown in FIG. 8, a large noise prevention effect can be obtained by the above-described synergistic effect by forming a gently curved surface so as to provide a recess in the intake door. That is, when the method of forming the depression is adopted, the first door connecting portion (1-4-1) including the first door connecting edge portion (1-4-4) corresponding to the removal of the corner portion. ) And the first case side wall (1-5-1) increase in size, the air flow (6) is decelerated, and the outside air (3) flow (3-1) is smooth. In addition to the effect of being guided to the inside, the effect of preventing noise is further exhibited.

10 and 11 show a first door connecting portion (1-4-1) including a first door connecting edge portion (1-4-4) in a conventional intake door (1-4) as a ventilation speed reducing means. ) And / or at least part of the outside of the door peripheral wall portion (1-4-3) including the door peripheral wall edge portion (1-4-6). In FIG. 10, a ventilation resistance increasing element is provided on both the first door connecting edge (1-4-4) and the first case side wall (1-5-1). Just be fine. Further, in FIG. 10, although the ventilation resistance increasing element is provided at the first door connecting edge (1-4-4), as can be seen from the above definition of the interval, the intake door (1-4) and The place where the ventilation resistance increasing element is provided varies depending on the shape of the intake case (1-5). In this method, the first door connecting portion (1-4-1) including the first door connecting edge portion (1-4-4) and the first case side wall portion (1-5-1) are formed. It is necessary to dispose the ventilation resistance increasing element in a place where the minimum interval is provided.

As such a ventilation resistance increasing element, FIG. 11A shows an example in which a plurality of dimples are formed, FIG. 11B shows an example in which a plurality of ribs are formed, and FIG. An example is shown in which a plurality of protrusions having a triangular cross section are formed in parallel in a direction substantially perpendicular to the ventilation direction. These are both a plan view of the air flow resistance increasing element as viewed from above and a cross-sectional view when cut perpendicularly to the paper surface with axes C, D, and E, but the shape is limited to these. Is not to be done.

  As described above, the ventilation speed reduction means for preventing noise of the air conditioner of the present invention is a method for controlling the speed of air flowing through a narrow flow path based on fluid engineering, and in particular, an air conditioner for ensuring space. In the downsizing, the ventilation speed reducing means of the present invention is effective. Therefore, the present invention is highly applicable not only to the air conditioner industry and the automobile industry but also to the housing and construction industries.

1: Vehicle air conditioner 1-1: Outside air introduction port 1-2: Side surface air suction port 1-3: Circumferential surface air suction port 1-4: Intake door 1-4-a: Recessed intake door 1-4 -B: curved-type intake door 1-4-c: turbulent intake door 1-4-1: first door connecting portion 1-4-2: second door connecting portion 1-4-3: door peripheral wall Part 1-4-4: First door connecting edge (inside air suction side)
1-4-5: Second door connecting edge (outside air introduction side)
1-4-6: Door peripheral wall edge portion 1-4-7: First door rotation shaft 1-4-8: Second door rotation shaft 1-4-9: First door embedded portion 1 -4-10: first door curved surface forming portion 1-5: intake case 1-5-1: first case side wall 1-5-2: second case side wall 1-5-3: case peripheral wall 1- 6: Blower 1-7: Refrigerant piping 1-8: Bell mouth 2: Inside / outside air switching unit 3: Outside air 3-1: Flow of outside air 4: Inside air (side surface)
4-1 Flow of inside air 5: Inside air (circumferential surface)
6: Air flow between the first door connection edge and the case side wall 7: A distance between the first door connection edge and the case side wall 8: A distance between the door peripheral wall edge and the case peripheral wall 9: Ventilation resistance increasing element 9 -1: Dimple 9-2: Rib 9-3: Triangular protrusion A: Blower central axis B: Cutting line (parallel to the paper surface)

Claims (10)

A blower (1-6) in which a motor and a fan are arranged;
A pivot shaft, a door peripheral wall portion disposed on the radially outer peripheral side of the pivot shaft and rotating and displaced integrally with the pivot shaft, and disposed at both ends of the door peripheral wall portion in the pivot axis direction. An intake door (1-4) having a pair of door connecting portions for connecting the shaft and the door peripheral wall portion;
A side air inlet (1-2) that encloses the intake door and can be closed by the door connecting portion and introduces the inside air into the blower, a pair of case side walls formed on substantially the same plane as the side air inlet, An outside air introduction port (1-1) that can be closed by the door peripheral wall portion and is eccentric with respect to the blower in the rotational axis direction; a first case side wall of the pair of case side walls; and the outside air introduction port; An intake case (1-5) having a case peripheral wall connecting the two;
The speed of the wind passing between the first door connecting part adjacent to the case peripheral wall of the pair of door connecting parts and the first case side wall connected to the case peripheral wall of the pair of case side walls is reduced. A vehicle air conditioner (1), characterized by comprising ventilation reduction means.   In the ventilation speed reducing means, a first interval which is an interval between the first door connecting portion and the first case side wall is a second door connecting portion and the pair of case side walls of the pair of door connecting portions. The vehicle air conditioner according to claim 1, wherein the air conditioner is disposed so as to be larger than a second interval which is an interval between the second case side wall and the second case side wall. The vehicle air conditioner according to claim 2, wherein the first interval is approximately 1.2 to 3.0 times the second interval. In the ventilation speed reducing means, a first interval that is an interval between the first door connecting portion and the first case side wall is greater than a third interval that is an interval between the door peripheral wall portion and the case peripheral wall. The vehicle air conditioner according to any one of claims 1 to 3, wherein the vehicle air conditioner is arranged to be large. The vehicle air conditioner according to claim 4, wherein the first interval is approximately 1.2 to 3.0 times the third interval. 2. The vehicle air conditioner according to claim 1, wherein the ventilation reduction unit has a structure in which the first door connecting portion and the door peripheral wall portion are connected by a gentle curved surface. The vehicle air conditioner according to claim 6, wherein the gentle curved surface has a structure in which a corner portion formed by the first door connecting portion and the door peripheral wall portion is embedded. The vehicle air conditioner according to claim 6, wherein the gentle curved surface has a structure in which a depression is formed in the first door connecting portion and the door peripheral wall portion. The air flow reduction means is a ventilation resistance increasing element disposed on at least a part of the outer side of the first door connecting part and / or at least a part of the inner side of the case side wall. The vehicle air conditioner described. 10. The airflow resistance increasing element is a dimple or a rib formed on at least a part of the outside of the first door connecting portion and / or at least a part of the inside of the case side wall. Vehicle air conditioner.