JP2020059301A - Air conditioner for vehicle - Google Patents

Abstract

To provide an air conditioner for vehicle which is inhibited from being increased in size and which can reduce noise caused by a backflow generated at an inlet of a ventilation passage.SOLUTION: An air conditioner for vehicle includes a flow width adjustment portion 14 disposed at an inlet port 11BA of a ventilation passage 11B to be connected on an inner surface 31a of a first side wall 31, having an upper end connected to a fan attachment portion 35, extending downward, and arranged between a third wall 33 and a nose portion 37 in a Y direction. The nose portion 37 includes an inclined portion 37A inclined to the third wall 33 such that the width of the inlet port 11BA increases in a Z direction from an inlet toward an outlet of the inlet port 11BA of the ventilation passage 11B. The flow width adjustment portion 14 is configured to reduce, in the Z direction, the width in the Y direction of the inlet port 11BA of the ventilation passage 11B.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vehicle air conditioner.

  A vehicle air conditioner applied to a vehicle such as an automobile has a housing, a blower fan, an evaporator, and a heater core. A vehicle air conditioner blows air at a desired temperature by appropriately mixing cold air generated through an evaporator and warm air generated by a heater core by using a part of the cold air in a housing (for example, Patent Document 1). Reference 1.).

  As the housing, a fan housing space for housing a blower fan, an evaporator housing space for housing an evaporator, a ventilation passage connected to the fan housing space for sending air to the evaporator, and a front-back direction of the housing. Some have a side wall and a nose portion that define an inlet portion of the air flow passage.

  The inlet portion of the blower flow passage is formed so that the width thereof becomes wider from the inlet side to the outlet side of the blower flow passage in the front-back direction of the housing. The blower flow passage is disposed on the downstream side of the inlet portion, has a diameter larger than that of the inlet portion, and includes a diameter-increasing flow passage portion facing the heater core.

JP, 2004-161061, A

In the above-described vehicle air conditioner, it is desired to reduce the size of the vehicle air conditioner as much as possible in order to secure the space for installing equipment such as an engine and the size of the indoor space.
In particular, it is desired to reduce the outer dimension of the vehicle air conditioner in the vehicle front-rear direction (vehicle air-conditioner front-rear direction).

  As described above, when the outer shape of the vehicle air conditioner is reduced, a backflow of air may occur on the nose side of the inlet of the blower flow path due to the pressure loss when passing through the evaporator or the heater core, which may increase noise. there were.

  Therefore, it is an object of the present invention to provide a vehicle air conditioner capable of reducing the noise caused by the backflow of air generated at the inlet portion of the blower flow path while suppressing the increase in size. .

  In order to solve the above problems, a vehicle air conditioner according to an aspect of the present invention includes a blower fan that blows air, an evaporator that cools the air blown from the blower fan, and an evaporator that cools the air. A heater core that heats the fan to generate warm air, a fan housing space that houses the blower fan, a ventilation passage that communicates with the fan housing space and guides the air blown from the blower fan downward, the blowing fan An evaporator accommodation space that is arranged on the downstream side of the flow path and communicates with the blower flow path, and that houses the evaporator, a heater core housing space that is arranged on the downstream side of the evaporator housing space that houses the heater core, and a width direction. A first side wall arranged on one side, a second side wall arranged on the other side in the width direction, and a front and rear direction orthogonal to the width direction. A third wall connecting the first and second side walls, and an inner surface of the first side wall, which is provided on a surface exposed to the fan accommodating space. 2 is arranged on the outlet side of the fan mounting portion that projects in the direction toward the side wall of the fan 2 to which the blower fan is attached, and the third wall in the front-back direction between the blower flow path. A casing having a nose portion for partitioning an inlet portion, and an inlet portion of the blower flow path provided to be connected to the inner surface of the first side wall, the upper end of which is connected to the fan attachment portion, A flow passage width adjusting portion that extends and is disposed between the third wall and the nose portion in the front-rear direction, the nose portion extending from an inlet of the blower passage toward an outlet thereof. Direction of the air flow path The flow passage width adjusting unit has a sloped portion that is inclined with respect to the third wall so as to widen the width of the portion, and the flow passage width adjustment unit narrows the width of the inlet portion of the blower flow passage in the front-rear direction. .

According to the present invention, by having the flow passage width adjusting portion having the above-mentioned configuration, the formation position of the inlet portion of the blower passage is formed from the vicinity of the nose portion where backflow of air easily occurs to the third wall side. It is possible to move.
This makes it possible to suppress the occurrence of backflow of air at the inlet portion of the blower flow path formed between the third wall and the flow path width adjusting unit, and thus suppresses the increase in size of the vehicle air conditioner. In the above, it is possible to reduce the noise caused by the backflow of air generated at the inlet portion of the air flow passage.

  Further, in the vehicle air conditioner according to one aspect of the present invention, the flow path width adjusting unit is disposed on the third wall side and narrows a width of an inlet portion of the blower flow path in the front-rear direction. The position of the nose portion and the position of the third wall where the distance between the nose portion and the third wall is the shortest in the front-back direction. It may be arranged between an imaginary plane passing through an intermediate position between and and the position of the nose portion.

  Thus, between the position of the nose part and the virtual plane that passes through the intermediate position between the position of the nose part and the position of the third wall where the distance between the nose part and the third wall is the shortest in the front-rear direction. By disposing the flow path width adjusting surface, it is possible to prevent the flow path width adjusting portion corresponding to the flow path width adjusting surface from becoming a large barrier to the flow of air. As a result, it is possible to reduce the noise caused by the backflow of the air generated at the inlet of the blower flow path without limiting the cooling performance.

  Further, in the vehicle air conditioner according to the aspect of the present invention, the flow path width adjusting unit is arranged such that a width of the inlet portion in the front-rear direction is a constant value in a direction in which the inlet portion extends. You may let me.

  In this way, in the direction in which the inlet portion extends, by setting the width of the inlet portion of the blower flow passage in the front-rear direction to a constant value, it is possible to prevent the flow passage width adjustment unit from becoming a barrier to the air blown. Therefore, it is possible to enhance the effect of reducing noise at the inlet of the air flow passage.

  In the vehicle air conditioner according to the aspect of the present invention, the width of the flow path width adjusting portion in the width direction may be equal to or less than the thickness of the fan mounting portion in the width direction.

  In this way, by setting the width of the flow passage width adjusting portion to be equal to or less than the thickness of the fan mounting portion, it is possible to suppress the end of the flow passage width adjusting portion and the blower fan from facing each other in the radial direction of the blower fan. Becomes This makes it possible to prevent the flow path width adjusting unit from becoming a barrier to the flow of air sent from the blower fan. Therefore, it is possible to reduce the noise caused by the backflow of the air generated at the inlet portion of the blower flow path without disturbing the flow of the air from the blower fan.

  Further, in the vehicle air conditioner according to one aspect of the present invention, the blower flow passage is disposed on a downstream side of an inlet portion of the blower flow passage, communicates with the inlet portion, and extends in the front-rear direction. It extends and faces the evaporator, and includes a diameter-increasing flow passage portion having a flow passage cross-sectional area larger than that of the inlet portion, and the lower end of the flow passage width adjusting portion may be arranged above the lower end of the nose portion. Good.

  In this way, by arranging the lower end of the flow passage width adjusting portion above the lower end of the nose portion, when air flows from the inlet portion of the blower passage to the flow passage having a larger flow passage cross-sectional area than the mouth portion. In addition, it is possible to prevent the lower part of the flow path width adjusting unit from becoming a barrier to the air flow.

  Further, in the vehicle air conditioner according to the aspect of the present invention, the flow path width adjusting unit may be a plate member having a flow path width adjusting surface arranged on the third wall side.

  As described above, by using the plate member having the flow passage width adjusting surface arranged on the third wall side as the flow passage width adjusting portion, the width of the inlet portion of the blower passage in the front-rear direction can be narrowed. it can.

  Further, in the vehicle air conditioner according to the aspect of the present invention, the flow path width adjusting portion may be a block member having a flow path width adjusting surface arranged on the third wall side.

  As described above, by using the block material having the flow passage width adjusting surface arranged on the third wall side as the flow passage width adjusting portion, the width of the inlet portion of the blower passage in the front-rear direction can be narrowed. You can

  According to the present invention, it is possible to suppress the increase in size and reduce the noise caused by the backflow of air generated at the inlet portion of the blower flow path.

It is the figure seen from one side of the direction of order of the air-conditioner for vehicles concerning the embodiment of the present invention. FIG. ₂ is a cross-sectional view taken along line A ₁ -A ₂ of the vehicle air conditioner shown in FIG. 1. FIG. 3 is a cross-sectional view taken along line B ₁ -B _{2 of the} structure shown in FIG. 2. It is the figure which expanded the part enclosed by the area | region C among the structures shown in FIG. It is a figure for demonstrating the area | region which can arrange | position a flow path width adjustment surface. It is a figure for demonstrating the flow path width adjustment part which concerns on the modification of embodiment of this invention.

(Embodiment)
The vehicle air conditioner 10 according to the present embodiment will be described with reference to FIGS. 1 to 5.
The X direction shown in FIGS. 1 and 3 indicates the width direction of the housing 11 (the width direction of the vehicle air conditioner 10). The Y direction shown in FIGS. 2, 4, and 5 indicates the front-rear direction of the housing 11 (the front-rear direction of the vehicle air conditioner 10) orthogonal to the X direction.
The Z direction shown in FIGS. 1 to 5 indicates the height direction of the housing 11 (the height direction of the vehicle air conditioner 10) orthogonal to the X direction and the Y direction.
The dotted arrow shown in FIG. 2 indicates the direction in which air moves. In FIG. 3, M1 is the thickness of the fan attachment portion 35 in the X direction (hereinafter, referred to as “thickness M1”), and W1 is the width of the flow path width adjustment portion 14 in the X direction (hereinafter, referred to as “width W1”). Shown respectively.

4 and 5, P1 is the position of the nose portion where the distance E between the nose portion 37 and the third wall 33 is closest in the X direction (hereinafter referred to as "position P1"), and P2 is the nose portion in the X direction. The position (hereinafter, referred to as "position P2") of the inner surface 33Aa of the side wall portion 33A (a part of the third wall 33) where the distance E between the 37 and the third wall 33 is closest (hereinafter, referred to as "position P2"), P3 is the position P1 and the position P2. And intermediate positions (hereinafter, referred to as “intermediate position P3”).
4 and 5, W2 indicates the width in the Y direction (hereinafter, referred to as “width W2”) of the blower flow passage 11B formed between the side wall portion 33A and the flow passage width adjustment portion 14.
1 to 5, the same components are designated by the same reference numerals.

  The position of the diff and face damper 29 shown by the dotted line in FIG. 2 indicates the position where the diff and face damper 29 opens the center face outlet 11I and the side face outlets 11J and 11K.

  The vehicle air conditioner 10 includes a housing 11, a blower fan 13, a flow path width adjusting unit 14, an evaporator 15, a heater core 17, a slide damper 19, front foot ducts 21 and 22, and rear foot ducts. 24, 25, a rotary damper 28 for the foot, and a damper 29 for the differential and the face.

  The housing 11 includes a fan accommodation space 11A, a blower passage 11B, an evaporator accommodation space 11C, a cold air passage 11D, a heater core accommodation space 11E, a warm air passage 11F, and an air mix space 11G. , The differential and face flow path 11H, the center face outlet 11I, the side face outlets 11J and 11K, and the differential outlet 11L.

The fan housing space 11A is a space for housing the blower fan 13.
The air flow passage 11B is disposed below the fan housing space 11A. The air flow passage 11B connects the fan housing space 11A and the evaporator housing space 11C.
The blower flow passage 11B has an inlet portion 11BA and an enlarged diameter flow passage portion 11BB.

  The inlet portion 11BA communicates with the fan accommodation space 11A and extends below the fan accommodation space 11A. The inlet portion 11BA is arranged between the third wall 33 and the nose portion 37 which form the housing 11.

The diameter-enlarged flow path portion 11BB is arranged on the downstream side of the inlet portion 11BA and connects the inlet portion 11BA and the evaporator housing space 11C. The diameter-enlarged flow path portion 11BB extends in the Y direction and faces the evaporator 15. The diameter-increasing flow path portion 11BB is configured so that the flow path cross-sectional area is larger than that of the inlet portion 11BA.
The blower flow path 11B configured as described above guides the air blown from the blower fan 13 to the evaporator 15.

  11 C of evaporator accommodation spaces are arrange | positioned in the downstream of the flow path 11B for ventilation. The evaporator accommodation space 11C communicates with the air flow passage 11B. As a result, the air blown by the blower fan 13 is supplied to the evaporator housing space 11C through the blower flow passage 11B. The evaporator housing space 11C is a space for housing the evaporator 15.

  The cold air flow passage 11D is arranged on the downstream side of the evaporator housing space 11C. The cold air flow passage 11D communicates with the evaporator housing space 11C. The air (cool air) cooled by the evaporator 15 flows through the cold air flow passage 11D.

  The heater core housing space 11E is arranged downstream of the cold air flow passage 11D (downstream of the evaporator housing space 11C). The heater core housing space 11E is a space for housing the heater core 17.

  The hot air flow passage 11F is arranged on the downstream side of the heater core housing space 11E. The hot air flow passage 11F communicates with the heater core housing space 11E. The hot air heated by the heater core 17 flows through the hot air flow passage 11F.

  The air mix space 11G is arranged downstream of the cold air flow passage 11D and the warm air flow passage 11F. At the position of the slide damper body 19B (one of the components of the slide damper 19) shown in FIG. 2, the air mix space 11G communicates with the cold air flow passage 11D and the warm air flow passage 11F. In this state, cold air and warm air are supplied to the air mix space 11G, and the cold air and warm air are mixed to generate air at a desired temperature.

  When the position of the slide damper main body 19B shown in FIG. 2 slides downward and the cool air from the evaporator 15 is not supplied to the heater core 17, only the cool air is supplied to the air mix space 11G.

The differential and face flow passage 11H is arranged above the air mix space 11G. At the position of the foot rotary damper 28 shown in FIG. 2, the differential and face flow path 11H communicates with the air mix space 11G.
In this state, the air that has passed through the air mix space 11G is supplied to the differential and face flow paths 11H.

  When the rotary damper 28 for the foot blocks the inlet of the flow path 11H for the differential and face, the air that has passed through the air mix space 11G is not supplied to the flow path 11H for the differential and face.

  The center face outlet 11I and the side face outlets 11J and 11K are provided downstream of the differential and face flow passage 11H and communicate with the differential and face flow passage 11H. The side face outlets 11J and 11K are arranged so as to sandwich the differential and face flow passage 11H from the X direction.

  The differential air outlet 11L is arranged downstream of the differential and face flow passage 11H and communicates with the differential and face flow passage 11H. The differential air outlet 11L is arranged closer to the blower fan 13 than the position where the center face outlet 11I and the side face outlets 11J and 11K are formed.

  The housing 11 has a first side wall 31, a second side wall 32, a third wall 33, a fourth wall 34, a fan mounting portion 35, and a nose portion 37.

The first side wall 31 is arranged on one side in the X direction (one side in the width direction). The first side wall 31 has an inner surface 31a.
The second side wall 32 is arranged on the other side in the X direction (the other side in the width direction). The second side wall 32 faces the first side wall 31 (specifically, the inner surface 31a of the first side wall 31) in the X direction.

  The first and second side walls 31 and 32 configured as described above include the fan accommodation space 11A, the air flow passage 11B, the evaporator accommodation space 11C, the cold air passage 11D, the heater core accommodation space 11E, and the hot air passage 11F. , The air mix space 11G and the differential and face flow paths 11H are defined in the X direction.

The third wall 33 is arranged on the other side in the Y direction. The third wall 33 has one end in the X direction connected to the first side wall 31 and the other end in the X direction connected to the second side wall 32.
The third wall 33 defines the other side in the Y direction of the fan accommodation space 11A, the air flow passage 11B, and the evaporator accommodation space 11C.
The third wall 33 has a side wall portion 33A that partitions the inlet portion 11BA of the blower flow passage 11B. The side wall portion 33A extends in the Z direction. The side wall portion 33A has an inner surface 33Aa orthogonal to the Y direction.

  The fourth wall 34 is arranged on one side in the Y direction and has an outer surface 34a. The fourth wall 34 has one end in the X direction connected to the first side wall 31 and the other end in the X direction connected to the second side wall 32.

The fan mounting portion 35 is provided on a surface of the inner surface 31a of the first side wall 31 exposed to the fan housing space 11A. The fan mounting portion 35 projects from the inner surface 31 a of the first side wall 31 toward the second side wall 32.
The fan attachment portion 35 faces the second side wall 32 in the X direction. The fan attachment portion 35 has a surface 35 a facing the blower fan 13 attached to the fan attachment portion 35. The outer shape of the fan attachment portion 35 is configured to be larger than the outer diameter of the blower fan 13.

The nose portion 37 is arranged between the first side wall 31 and the second side wall 32. The nose portion 37 has an inclined portion 37A that faces the side wall portion 33A of the third wall 33 with the inlet portion 11BA of the blower flow passage 11B interposed therebetween in the Y direction.
The inclined portion 37A is an inclined surface inclined with respect to the inner surface 33Aa of the side wall portion 33A so as to widen the width of the inlet portion 11BA of the blower flow passage 11B in the direction from the inlet to the outlet of the blower flow passage 11B. Has 37 Aa.

  For this reason, when partitioning the inlet portion 11BA in the Y direction using the side wall portion 33A and the inclined portion 37A, the width of the inlet portion 11BA in the Y direction becomes wider from the inlet of the inlet portion 11BA toward the outlet.

  The blower fan 13 is fixed to the fan mounting portion 35 with the fan body rotatable. A ring-shaped flow path is formed in the circumferential direction of the blower fan 13. The ring-shaped passage is configured such that the width of the blower fan 13 in the radial direction gradually increases from the inlet toward the outlet. The blower fan 13 blows air to the blower flow passage 11B.

The flow channel width adjusting unit 14 has a flow channel width adjusting unit main body 41 and a lid 42.
The flow path width adjusting unit main body 41 is a plate-like member arranged in a portion of the inlet portion 11BA of the air flow passage 11B located between the side wall portion 33A and the inclined portion 37A. The flow path width adjusting unit main body 41 is arranged so as to narrow the width of the inlet portion 11BA of the blower flow path 11B in the Y direction.
One end of the flow path width adjusting part main body 41 on the one side in the X direction is connected to the inner surface 31a of the first side wall 31 located between the side wall part 33A and the inclined part 37A.

In this way, the inner surface 31a of the first side wall 31 and the flow path width adjusting section main body are connected by connecting the end of the flow path width adjusting section main body 41 on the one side in the X direction and the inner surface 31a of the first side wall 31. Since there is a gap between the first side wall 31 and the flow path width adjusting portion main body 41, it is possible to prevent air from flowing into the inclined portion 37A side of the nose portion 37.
As a result, it is possible to suppress the occurrence of the backflow of air due to the air flowing from the space between the first side wall 31 and the flow path width adjusting portion main body 41 to the inclined portion 37A side of the nose portion 37.

An upper end 41A of the flow path width adjustment unit main body 41 (an upper end 14A of the flow path width adjustment unit 14) is connected to the fan mounting portion 35.
As described above, by connecting the upper end 41A of the flow path width adjusting unit main body 41 to the fan mounting portion 35, a gap is formed between the upper end 41A of the flow path width adjusting unit main body 41 and the fan mounting portion 35. Therefore, it is possible to suppress air from flowing between the upper end 41A of the flow path width adjusting portion main body 41 and the fan mounting portion 35 to the inclined portion 37A side of the nose portion 37.
As a result, it is possible to suppress the occurrence of the backflow of air due to the air flowing from the space between the upper end 41A of the flow path width adjusting unit body 41 and the fan mounting portion 35 to the inclined portion 37A side of the nose portion 37.

  The flow path width adjusting unit main body 41 extends from the connection position between the upper end 41A and the fan mounting portion 35 to one side in the Z direction toward the bottom of the housing 11. The flow channel width adjusting portion main body 41 has a flow channel width adjusting surface 41a that faces the inner surface 33Aa of the side wall portion 33A and is parallel to the inner surface 33Aa. The flow passage width adjusting surface 41a defines the Y direction of the inlet portion 11BA of the air passage 11B together with the inner surface 33Aa.

By providing the flow path width adjusting portion main body 41 having the above-described configuration, the formation position of the inlet portion 11BA of the blower flow passage 11B can be set from the vicinity of the nose portion 37 where backflow of air is likely to occur to the side of the third wall 33. It is possible to move.
As a result, it is possible to suppress the occurrence of backflow of air in the inlet portion 11BA of the blower flow passage 11B formed between the third wall 33 and the flow passage width adjustment unit main body 41. It is possible to suppress the noise caused by the backflow of the air generated at the inlet portion 11BA of the blower flow passage 11B while suppressing the increase in size.

  The flow path width adjusting surface 41a passes through an intermediate position P3 between the position P1 of the nose portion 37 and the position P2 of the side wall portion 33A where the distance between the nose portion 37 and the side wall portion 33A of the third wall is closest in the Y direction. It may be arranged between the virtual plane D to be operated and the position P1 of the nose portion 37.

  In this way, by disposing the flow passage width adjusting surface 41a between the virtual plane D passing through the intermediate position P3 and the position P1 of the nose portion 37, the flow passage width adjusting surface corresponding to the flow passage width adjusting surface 41a is adjusted. It becomes possible to suppress that the part main body 41 becomes a big barrier with respect to the flow of air. Accordingly, it is possible to reduce the noise caused by the backflow of the air generated at the inlet portion 11BA of the blower flow passage 11B without limiting the cooling performance.

Further, the flow path width adjusting unit main body 41 may be arranged so that the width W2 of the inlet portion 11BA in the Y direction has a constant value in the Z direction (direction in which the inlet portion 11BA extends), for example (FIG. 4). reference).
In this way, by setting the width W2 of the inlet portion 11BA to a constant value in the Z direction, it is possible to enhance the effect of noise reduction at the inlet portion 11BA without the flow path width adjusting unit main body 41 becoming a barrier. .

  The lid 42 is plate-shaped, one end portion 42A is connected to the lower end 41B of the flow path width adjustment unit body 41, and the other end portion 42B (the lower end 14B of the flow path width adjustment unit 14) is inclined. It is connected to the lower part of the portion 37A. The end of the lid 42 on one side in the X direction is connected to the inner surface 31 a of the first side wall 31.

  The lid 42 closes the inlet of the space F formed between the flow path width adjustment unit main body 41 and the inclined portion 37A. By providing the lid 42 having such a configuration, it is possible to suppress the backflow of air in the space F.

It is preferable that the width W1 of the flow path width adjusting unit 14 configured as described above is set within a range of, for example, the thickness M1 or less of the fan mounting unit 35.
As described above, by setting the width W1 of the flow passage width adjusting unit 14 to be equal to or less than the thickness M1 of the fan mounting portion 35, the end portion of the flow passage width adjusting unit 14 on the other side in the X direction in the radial direction of the blower fan 13. It is possible to suppress the air blower and the blower fan from facing each other.
This makes it possible to prevent the flow path width adjusting unit 14 from becoming a barrier to the flow of air sent from the blower fan 13. Therefore, it is possible to reduce the noise caused by the backflow of air generated at the inlet portion 11BA of the blower flow path 11B without disturbing the flow of air from the blower fan 13.

Further, the lower end 14B of the flow path width adjusting unit 14 configured as described above is preferably arranged, for example, above the lower end 37B of the nose portion 37.
In this way, by disposing the lower end 14B of the flow passage width adjusting unit 14 above the lower end 37B of the nose portion 37, the flow passage cross-sectional area is larger than the inlet portion 11BA to the inlet portion 11BA of the blower passage 11B. It is possible to prevent the lower portion of the flow path width adjusting unit 14 from becoming a barrier to the flow of air when the air flows into the expanded diameter flow path unit 11BB.

  The evaporator 15 is arranged in the evaporator accommodation space 11C. The evaporator 15 cools the air supplied from the blower fan 13 to generate cold air. The generated cold air flows through the cold air flow passage 11D.

  The heater core 17 is arranged in the heater core housing space 11E. When the cool air is supplied from the evaporator 15, the heater core 17 warms the cool air to generate hot air. The generated hot air flows through the hot air flow passage 11F.

The slide damper 19 is housed in the housing 11 and is arranged between the evaporator 15 and the heater core 17. The slide damper 19 has a rotating shaft 19A and a slide damper body 19B.
The rotary shaft 19A is configured to be rotatable around its axis. A plurality of irregularities are formed in the circumferential direction of the rotating shaft 19A.

The slide damper body 19B is arranged closer to the heater core 17 than the position where the rotary shaft 19A is arranged. The slide damper body 19B has irregularities that engage with the irregularities of the rotary shaft 19A.
In the state shown in FIG. 2, when the rotary shaft 19A rotates clockwise, the slide damper body 19B slides (moves) downward. On the other hand, in the state shown in FIG. 2, when the rotary shaft 19A rotates counterclockwise, the slide damper body 19B slides (moves) upward.

  The front foot duct 21 is provided on the outer surface of the first side wall 31. The front foot duct 21 partitions the front foot passage. The inlet of the front foot passage communicates with the air mix space 11G.

The front foot duct 22 is provided on the outer surface of the second side wall 32. The front foot ducts 21 and 22 are arranged so as to sandwich the housing 11 from the X direction.
The front foot duct 22 defines a front foot passage. The inlet of the front foot passage communicates with the air mix space 11G.

The rear foot ducts 24 and 25 are provided below the outer surface 34 a of the fourth wall 34. The rear foot ducts 24, 25 are arranged in the X direction.
The rear foot duct 24 defines a rear foot passage that communicates with the air mix space 11G. The rear foot duct 25 defines a rear foot passage that communicates with the air mix space 11G.

The foot rotary damper 28 is disposed in the air mix space 11G. The foot rotary damper 28 includes a rotating shaft 28A and a damper body 28B that rotates together with the rotating shaft 28A.
The foot rotary damper 28 rotates the rotary shaft 28A to change the position of the damper main body 28B, so that the foot rotary damper 28 changes the opening of the inlet of the flow path 11H for the differential and the face and the flow for the front foot. The opening of the entrance of the passage and the rear foot passage is adjusted.

The differential and face damper 29 is rotatably provided in the housing 11 located between the center face outlet 11I and the side face outlets 11J and 11K and the differential outlet 11L.
The differential and face damper 29 adjusts the openings of the center face outlet 11I, the side face outlets 11J and 11K, and the differential outlet 11L.

According to the vehicle air conditioner 10 of the present embodiment, by having the flow path width adjusting unit 14 configured as described above, the third wall is formed from the vicinity of the inclined surface 37Aa of the nose portion 37 in which the backflow of air is likely to occur. It is possible to move the formation position of the inlet portion 11BA of the air flow passage 11B to the 33 side.
As a result, it is possible to suppress the occurrence of backflow of air in the inlet portion 11BA of the blower flow passage 11B formed between the third wall 33 and the flow passage width adjusting unit 14, and thus the air conditioner 10 for the vehicle While suppressing an increase in size, it is possible to reduce noise caused by the backflow of air generated at the inlet portion 11BA of the blower flow passage 11B.

  In the present embodiment, as an example, the case where the flow channel width adjusting unit 14 has the flow channel width adjusting unit main body 41 and the lid 42 has been described, but the flow channel width adjusting unit is used for the flow channel width adjusting unit. You may comprise only the part main body 41. In this case, it is possible to obtain the same effect as that of the flow path width adjusting unit main body 41 described in this embodiment.

  Next, with reference to FIG. 6, a flow path width adjusting unit 51 according to a modified example of the present embodiment will be described. 6, the same components as those of the structure shown in FIG. 4 are designated by the same reference numerals.

  The flow channel width adjusting portion 51 is a block member that is disposed on the third wall 33 side and has a flow channel width adjusting surface 51a that faces the inner surface 33Aa of the side wall portion 33A. The flow channel width adjusting surface 51a can be arranged within the same range as the flow channel width adjusting surface 41a described above.

An upper end 51A of the flow path width adjusting unit 51 is connected to the fan mounting portion 35, and a portion located below the upper end 51A is in contact with the inclined surface 37Aa of the inclined portion 37A.
The lower end 51B of the flow path width adjusting portion 51 is arranged above the lower end 37B of the nose portion 37.

  The flow path width adjusting unit 51 having such a configuration can obtain the same effect as that of the flow path width adjusting unit 14 described above.

  Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to such specific embodiments, and various modifications are possible within the scope of the gist of the present invention described in the claims. It can be modified and changed.

DESCRIPTION OF SYMBOLS 10 ... Vehicle air conditioner 11 ... Housing 11A ... Fan accommodation space 11B ... Blower flow passage 11BA ... Inlet portion 11BB ... Expanded flow passage portion 11C ... Evaporator accommodation space 11D ... Cold air passage 11E ... Heater core accommodation space 11F ... Temperature Flow channel for air 11G ... Air mix space 11H ... Flow channel for differential and face 11I ... Center face outlet 11J, 11K ... Side face outlet 11L ... Differential outlet 13 ... Blower fan 14, 51 ... Flow width adjusting unit 14A , 41A, 51A ... Upper end 14B, 37B, 41B, 51B ... Lower end 15 ... Evaporator 17 ... Heater core 19 ... Slide damper 19A, 28A ... Rotating shaft 19B ... Slide damper main body 21, 22 ... Front foot duct 24, 25 ... Rear foot Duct 28 ... Rotary damper for foot 28B ... Dan Main body 29 ... Diff and face damper 31 ... First side wall 31a, 33Aa ... Inner surface 32 ... Second side wall 33 ... Third wall 33A ... Side wall portion 34 ... Fourth wall 34a ... Outer surface 35 ... Fan attachment portion 35a Surface 37 ... Nose portion 37A ... Inclined portion 41 ... Flow path width adjusting body 41a, 51a ... Flow path width adjusting surface 42 ... Lid 42A ... One end 42B ... Other end D ... Virtual plane E ... Distance F ... Space M1 ... Thickness P1, P2 ... Position P3 ... Intermediate position W1, W2 ... Width

Claims (7)

A blower fan that blows air,
An evaporator that generates cold air by cooling the air blown from the blower fan,
A heater core that heats the cold air to generate warm air,
A fan accommodating space for accommodating the blower fan, a blower passage communicating with the fan accommodating space and for guiding air blown from the blower fan downward, the blower passage being disposed on the downstream side of the blower passage, While communicating with the flow channel for use, an evaporator housing space for housing the evaporator, a downstream side of the evaporator housing space, a heater core housing space for housing the heater core, a first side wall arranged on one side in the width direction, A second side wall arranged on the other side in the width direction, a third wall arranged in the front-rear direction orthogonal to the width direction and connecting the first and second side walls, and an inner surface of the first side wall. Among them, a fan provided on a surface exposed to the fan housing space, protruding from an inner surface of the first side wall toward the second side wall, and having the blower fan attached thereto Attaching portion, and is disposed on the outlet side of the fan housing space, a housing having a nose portion defining the inlet portion of the air blowing passage between the third wall in said longitudinal direction,
It is provided at an inlet portion of the blower flow path so as to be connected to the inner surface of the first side wall, and has an upper end connected to the fan attachment portion and extends downward, and the third wall in the front-back direction. And a flow path width adjusting portion disposed between the nose portion and
Equipped with
The nose portion has an inclined portion that is inclined with respect to the third wall so as to widen the width of the inlet portion of the blower flow passage in the direction from the inlet to the outlet of the blower flow passage. Then
The flow path width adjusting unit is a vehicle air conditioner that narrows a width of an inlet portion of the blower flow path in the front-rear direction. The flow path width adjusting portion includes a flow path width adjusting surface which is arranged on the third wall side and narrows a width of an inlet portion of the blower flow path in the front-rear direction,
The flow path width adjusting surface is a virtual plane that passes through an intermediate position between the position of the nose portion and the position of the third wall where the distance between the nose portion and the third wall is closest in the front-rear direction. The vehicle air conditioner according to claim 1, wherein the air conditioner is disposed between the nose portion and the position of the nose portion.   The vehicle air conditioner according to claim 1 or 2, wherein the flow path width adjusting unit is arranged so that a width of the inlet portion in the front-rear direction is a constant value in a direction in which the inlet portion extends.   The vehicle air conditioner according to any one of claims 1 to 3, wherein a width of the flow path width adjusting portion in the width direction is equal to or less than a thickness of the fan attachment portion in the width direction. The blower flow passage is arranged on a downstream side of an inlet portion of the blower flow passage, communicates with the inlet portion, extends in the front-rear direction, faces the evaporator, and has a flow passage cutoff than the inlet portion. Includes a large-diameter expanded channel section,
The vehicle air conditioner according to any one of claims 1 to 4, wherein a lower end of the flow path width adjusting portion is disposed above a lower end of the nose portion.   The vehicle air conditioner according to any one of claims 1 to 5, wherein the flow path width adjusting unit is a plate member having a flow path width adjusting surface arranged on the third wall side.   The flow channel width adjusting unit is a block member having a flow channel width adjusting surface disposed on the third wall side, and the flow channel width adjusting unit is a block member. Vehicle air conditioner.

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