JP4682942B2 - Air conditioner - Google Patents

Description

  The present invention relates to an air conditioner including a door that is rotatably supported.

  Conventionally, in an air conditioning casing of a vehicle air conditioner, an air mix door that adjusts an air volume ratio between an air volume flowing into a heater core and an air volume flowing into a cold air bypass, a seal rib provided on an inner wall of the air conditioning casing, and an air mix door There is a shaft cover that covers the rotating shaft from the downstream side and prevents air from leaking from the rotating shaft to the downstream side (see, for example, Patent Document 1).

  In this case, as shown in FIG. 8 (a), when the air mix door 1 is located at one end of the operating region θ, the air mix door 1 is in close contact between the packing member and the seal rib 2a, and the inlet of the heater core is formed. Close. Further, as shown in FIG. 8B, when the air mix door 1 is located at the other end of the operation region θ, the air mix door 1 is in close contact with the packing member and the seal rib 2b to close the inlet of the cold air bypass. To do.

As described above, when the air mix door 1 is located at either end of the operation region θ, it is possible to satisfactorily seal between the air mix door 1 and the inner wall of the air conditioning casing.
JP 2004-130973 A

  In the vehicle air conditioner described above, as shown in FIG. 8C, when the air mix door 1 is located in the intermediate region of the operation region θ, the cold air flowing from the heater core inlet side is indicated by an arrow Y. The air mix door 1 passes through the downstream side of the rotary shaft (between the rotary shaft 1a and the shaft cover 1b) and leaks to the cold air bypass side. For this reason, the air volume ratio adjustment by the air mix door 1 is not performed well.

  An object of this invention is to provide the air conditioner which suppressed the air leaking through the air downstream side of a door rotating shaft in view of the said point.

In order to achieve the above object, the present invention is provided between the side walls in the axial direction of the air conditioning casing. The first feature is that it includes a shielding plate that is formed so as to cover the rotating shaft in the axial direction and a storage portion that is provided on the plate-like door side and stores the shielding plate. To do.

  Therefore, when the plate-like door is located in the intermediate region of the operation region, the shielding plate can cover the rotation shaft in the axial direction between the one end portion of the operation region and the plate door main body. For this reason, when the plate-like door is located in the middle region of the operation region, the airflow flowing between the one end portion of the operation region and the plate door body is blocked by the shielding plate, so that one end portion of the operation region It is possible to prevent air from leaking through the air downstream side of the door rotation shaft from between the door and the plate door main body. In addition, since the storage portion is formed so as to cover the shielding plate, air can be hardly leaked between the shielding plate and the storage portion in a state where the storage portion stores the shielding plate.

  In addition, the code | symbol in the bracket | parenthesis of each means described in a claim and this column shows the correspondence with the specific means as described in embodiment mentioned later.

(First embodiment)
A vehicle air conditioner according to a first embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an overall configuration diagram of a vehicle air conditioner according to the present embodiment.

  The air conditioning casing 10 of the vehicle air conditioner is disposed inside the instrument panel at the front of the vehicle interior, and forms a passage for air flowing toward the vehicle interior. An inside / outside air switching box 11 is provided at the upstream end of the air flow of the air conditioning casing 10. The inside / outside air switching door 12 provided in the inside / outside air switching box 11 switches between the inside air inlet 13 and the outside air inlet 14 to open and close, thereby opening the air in the vehicle interior (inside air) or the air outside the vehicle interior (outside air). Is introduced. The inside / outside air switching door 12 is driven by a servo motor.

  On the downstream side of the air flow in the inside / outside air switching box 11, a blower 15 that sucks air from one of the inside air suction port 13 and the outside air suction port 14 and blows it out into the vehicle interior is arranged. It consists of an impeller 15a that generates an air flow by rotation and an electric motor 15b that rotationally drives the impeller 15a. In the air conditioning casing 10, a cooling heat exchanger 16 as a cooling unit is disposed on the downstream side of the air flow of the blower 15. The cooling heat exchanger 16 constitutes a refrigeration cycle together with a compressor that compresses and discharges the refrigerant, and cools the air blown from the blower 15 by evaporation of the refrigerant.

  In the air conditioning casing 10, a heater core 17 as a heating unit is disposed on the downstream side of the air flow of the cooling heat exchanger 16. The heater core 17 heats the blown air using cooling water (hot water) of the vehicle engine as a heat source.

  A bypass passage 18 is formed on the side of the heater core 17 so as to bypass the heater core 17 and allow the blown air to flow. An air mix door 19 is disposed between the cooling heat exchanger 16 and the heater core 17.

  The air mix door 19 is composed of a rotary shaft 19a and a plate door main body 19b, and rotates in the operation region θa. The rotating shaft 19a is disposed so as to be orthogonal to the air flow direction (see arrow Ya) and is supported rotatably with respect to the air conditioning casing 10. The plate door main body 19b is formed so as to protrude from the rotary shaft 19a to the air upstream side.

  The air mix door 19 is a temperature adjusting means, and the air blown into the vehicle interior by adjusting the air volume ratio between the warm air passing through the air inlet 17a (air flow path) of the heater core 17 and the cold air passing through the bypass passage 18. Adjust the temperature. The air mix door 19 is rotated by a servo motor. The specific structure of the air mix door 19 will be described later.

  Here, on the inner wall of the air conditioning casing 10, when the air mix door 19 is positioned at one of the end portions a <b> 1 and a <b> 2 of the operation region θa, the seal rib 30 that seals between the air mix door 19 and the inner wall of the air conditioning casing 10. , 31 are provided. In addition, the seal ribs 30 and 31 constitute an air leakage suppression structure to be described later.

  A defroster opening 20, a face opening 21, and a foot opening 22 are opened at the downstream end of the air flow of the air conditioning casing 10. The defroster opening 20 blows blown air toward the inner surface of the vehicle front window glass through the defroster duct. The face opening 21 blows out blown air toward the upper body side such as the face of the passenger in the passenger compartment or the upper body through the face duct. The foot opening 22 blows out the blast air toward the lower body side of the occupant's legs and lower body through the foot duct.

  A defroster door 23 that opens and closes the defroster opening 20 is provided upstream of the defroster opening 20, and a face door 24 that opens and closes the face opening 21 is provided upstream of the face opening 21. Yes. A foot door 25 that opens and closes the foot opening 22 is provided on the upstream side of the foot opening 22. The defroster door 23, the face door 24, and the foot door 25 are driven by a common servo motor through a link mechanism.

  The defroster door 23 includes a rotation shaft 23a and a plate door main body 23b, and rotates in the operation region θb. The rotating shaft 23 a is disposed so as to be orthogonal to the air flow direction and is supported rotatably with respect to the air conditioning casing 10. The plate door main body 23b is formed so as to protrude from the rotary shaft 23a to the air upstream side.

  The face door 24 is composed of a rotary shaft 24a and a plate door main body 24b, and rotates in the operation region θc. The rotating shaft 24 a is disposed so as to be orthogonal to the air flow direction and is supported rotatably with respect to the air conditioning casing 10. The plate door main body 24b is formed so as to protrude from the rotary shaft 24a to the air upstream side.

  The foot door 25 is composed of a rotating shaft 25a and a plate door main body 25b, and rotates within the operation region θd. The rotating shaft 25a is disposed so as to be orthogonal to the air flow direction, and is rotatably supported with respect to the air conditioning casing 10. The plate door main body 25b is formed so as to protrude from the rotary shaft 25a to the air upstream side.

  Here, the doors 19 and 23 to 25 have substantially the same structure although the dimensions and the like are different. Hereinafter, as a representative example of the doors 19 and 23 to 25, the structure of the air mix door 19 and the air leakage prevention structure thereof will be described with reference to FIGS.

  2A is a view of the air mix door 19 as viewed from the direction S in FIG. 1, FIG. 2B is a top view of the air mix door 19 in FIG. 2A, and FIG. It is AA sectional drawing in (a).

  As shown in FIGS. 2A and 2B, the plate door body 19b of the air mix door 19 includes a door substrate 190 made of a resin material (eg, polypropylene, nylon, ABS, etc.), an elastomer (eg, an olefin elastomer). ) And the like and the packing members 191 and 192 arranged so as to sandwich the door substrate 190 therebetween.

  As shown in FIG. 2C, a shield plate 193 is provided on the back side of the air mix door 19, and the shield plate 193 is made of a resin material (eg, polypropylene, nylon, ABS, etc.). , Protruding from the door substrate 190 and formed in a curved shape. As will be described later, the shielding plate 193 prevents air from leaking through the air downstream side of the rotating shaft 19a.

  Next, the air leakage prevention structure of the air mix door 19 will be described with reference to FIGS. 3 (a) and 3 (b).

  3A is a view of the air conditioning casing 10 viewed from the upstream side of the air with the air mix door 19 removed. FIG. 3B is a side view of the air conditioning casing 10 removed in FIG. It is the side view seen from the right side in a figure in a state.

  As shown in FIGS. 3A and 3B, the side walls 10a and 10b of the air conditioning casing 10 (that is, the side walls on both sides in the axial direction of the rotary shaft 19a) have shaft holes 110a and 110b through which the rotary shaft 19a passes. Is provided.

  Between the side walls 10a and 10b, a shaft shielding part 120 made of a resin material (for example, polypropylene, nylon, ABS, etc.) is provided to shield the leakage of air from the periphery of the rotation shaft 19a to the air downstream side. . The shaft shielding unit 120 is supported by the side walls 10a and 10b, and is formed in a semi-cylinder shape so as to cover the rotating shaft 19a from the downstream side of the air in the axial direction. In addition, the shaft shielding part 110 is fixed to the side walls 10a and 10b by fastening members such as screws. Alternatively, the shaft shielding unit 110 may be formed with a constant shape with respect to the side walls 10a and 10b.

  The seal rib 31 is a protruding portion that protrudes from the side walls 10a and 10b to the air flow path side (that is, the air mix door 19 side), and extends along one end a2 of the operation region θa as shown in FIG. Thus, it is formed linearly from the shaft shielding part 120.

  The seal rib 32 is a protruding portion protruding from the side of the air flow path (that is, toward the air mix door 19) from each of the side walls 10a and 10b, and as shown in FIG. 3B, at one end a1 of the operation region θa. It is formed linearly from the shaft shielding part 120 so as to be along.

  A storage unit 130 for storing the shielding plate 193 is provided between the side walls 10a and 10b in the radially outward direction of the shaft shielding unit 120. The storage portion 130 is formed such that the shaft shielding portion 120 is supported from the side walls 10a and 10b, faces the mouth portion 130a toward the air upstream side, and covers the shielding plate 193 from the air downstream side. The storage unit 130 is integrally formed with the shaft shielding unit 120 using a resin material (for example, polypropylene, nylon, ABS, or the like).

  Next, the operation of the present embodiment will be described with reference to FIG. FIG. 4 is a view of the air mix door 19 viewed from the axial direction.

  First, as shown by e1 (dashed line) in the figure, when the air mix door 19 is positioned at one end a1 of the operation region θa, the packing member 192 of the air mix door 19 is the seal rib 31 of the inner walls 10a and 10b of the air conditioning casing 10. To stick to each. Accordingly, in the state where the air mix door 19 closes the air inlet 17a of the heater core 17, the air mix door 19 can seal between the inner walls 10a and 10b of the air conditioning casing 10. Further, the shaft shielding unit 120 shields air from leaking from the periphery of the rotation shaft 19a of the air mix door 19 to the heater core 17 side. At this time, the shielding plate 193 is stored in the storage unit 130.

  Next, when the air mix door 19 rotates clockwise from the one end a <b> 1 of the operation region θa, the shielding plate 193 starts to come out of the storage unit 130. As shown by the solid line in the figure, when the air mix door 19 is located in the intermediate region of the operation region θa (that is, the region between the end portions a1 and a2), the shielding plate 193 operates with the air mix door 19. The rotary shaft 19a is shielded from the upstream side of the air between the one end a1 of the region θa. At this time, the cool air from the cooling heat exchanger 16 is blocked by the shielding plate 193.

  At this time, a part of the shielding plate 193 is accommodated in the storage unit 130, and the storage unit 130 is formed so as to cover the shielding plate 193, so that air is heated between the storage unit 130 and the shielding plate 193. Leakage to the 17 side can be suppressed.

  Next, when the air mix door 19 rotates clockwise and the air mix door 19 stops at one end a2 of the operation region θa as shown by e2 (chain line) in the figure, the packing member 192 of the air mix door 19 Are in close contact with the seal ribs 32 of the inner walls 10a, 10b of the air conditioning casing 10, respectively. Further, the shaft shielding portion 120 shields air from leaking from the periphery of the rotation shaft 19a of the air mix door 19 to the bypass passage 18 side.

  Accordingly, in the state where the air mix door 19 closes the cold air bypass passage 18, the air mix door 19 can seal between the inner walls 10 a and 10 b of the air conditioning casing 10.

  According to the present embodiment described above, when the air mix door 19 is located in the intermediate region of the operation region θa, the shielding plate 193 is disposed between the air mix door 19 and the one end a1 of the operation region θa. Is shielded from the air upstream side. For this reason, the cool air from the cooling heat exchanger 16 is blocked from flowing between the air mix door 19 and the one end a1 of the operation region θa.

  As described above, the cold wind pressure flowing between the air mix door 19 and the one end a1 is weakened by the shielding plate 193, and the blown air passes between the rotary shaft 19a and the shaft cover 120 and leaks to the cold wind bypass 18 side. Can be suppressed. Further, the cold air pressure flowing between the air mix door 19 and the other end a2 is weakened by the shielding plate 193, and the blown air may pass between the rotary shaft 19a and the shaft cover 120 and leak to the heater core 17 side. Can be suppressed.

  Furthermore, since the storage unit 130 is formed so as to cover the shielding plate 193 from the air downstream side, leakage from the space between the storage unit 130 and the shielding plate 193 to the heater core 17 side can be suppressed.

(Second Embodiment)
In the first embodiment described above, the example in which the shielding plate is provided on the air mix door side and the storage portion is provided on the air conditioning casing side has been described. Instead, in the second embodiment, the shielding plate is provided on the air mix door. The example which provided in the door side and provided the accommodating part in the air-conditioning casing side is demonstrated with reference to FIGS.

  5A is a view of the air mix door 19 as viewed from the direction S in FIG. 1, FIG. 5B is a top view of the air mix door 19 in FIG. 5A, and FIG. It is BB sectional drawing in (a).

  As shown in FIGS. 5A, 5B, and 5C, the plate door body 19b of the air mix door 19 is provided with a storage portion 130. (I.e., the cold air bypass 18 side) protrudes in a triangular cross section, is formed so as to cover from the cold air bypass 18 side, and the opening 130a is formed so as to face the lower side in the figure (the end a2 of the operation region θa). . The storage unit 130 is made of a resin material and is formed integrally with the door substrate 190.

  6A is a view of the air conditioning casing 10 viewed from the upstream side of the air with the air mix door 19 removed. FIG. 6B is a side view of the air conditioning casing 10 removed in FIG. 6A. It is the side view seen from the right side in a figure in a state.

  The shielding plate 193 is disposed between the side walls 10a and 10b, and is supported by a support portion 193a that extends downward from the lower end portion of the shaft shielding portion 120. The shielding plate 193 is made of a resin material (for example, polypropylene, nylon, ABS, etc.), and the shielding plate 193 is integrally formed with the shaft shielding portion 120 and the support portion 193a.

  According to the present embodiment configured as described above, as shown by the solid line in FIG. 7, when the air mix door 19 is located in the middle region of the operation region θa, the shielding plate 193 operates with the air mix door 19. The rotary shaft 19a is shielded from the upstream side of the air between the one end a1 of the region θa. At this time, the cool air from the cooling heat exchanger 16 is blocked from flowing between the air mix door 19 and the one end a1 of the operation region θa.

  Here, since the storage part 130 is formed so as to cover the shielding plate 193 from the bypass passage 18 side, cold air does not leak from the inlet side of the heater core 17 through the storage part 130 and through the cold air bypass 18.

  As described above, since the shielding plate 193 is provided in the same manner as in the first embodiment described above, the cool air flowing between the air mix door 19 and the one end a1 is between the rotary shaft 19a and the shaft cover 120. And leaking to the cold air bypass 18 side can be suppressed.

  Further, in the first and second embodiments described above, a sealing member such as a sponge for sealing the space between the shielding plate 193 in the storage unit 130 may be disposed. Thereby, when the shielding plate 193 is stored in the storage unit 130, it is possible to strongly suppress air from leaking to the heater core 17 side through the gap between the shielding plate 193 and the storage unit 130.

  Hereinafter, the correspondence relationship between the above embodiment and the configuration of the scope of the claims will be described. The air mix door 19 corresponds to a door, the shaft shielding portion 120 corresponds to a shaft cover portion, and the seal ribs 31 are first and second. 2, the shielding plate 193 corresponds to the shielding portion, and the storage portion 130 corresponds to the storage portion.

1 is an overall configuration diagram of a vehicle air conditioner according to a first embodiment of the present invention. It is a figure which shows the structure of the air mix door of FIG. It is a figure which shows the inside of the air-conditioning casing of FIG. It is a figure for demonstrating the action | operation of the air mix door of FIG. It is a figure which shows the structure of the air mix door in 2nd Embodiment of this invention. It is a figure which shows the inside of an air-conditioning casing in 2nd Embodiment. It is a figure for demonstrating the action | operation of an air mix door in 2nd Embodiment. It is a figure for demonstrating the action | operation of the conventional air mix door.

Explanation of symbols

DESCRIPTION OF SYMBOLS 19 ... Air mix door, (theta) a ... Operation area | region, 193 ... Shielding board a1, a2 ... One end part of operation area | region, 19a ... Rotating shaft, 16 ... Heat exchanger for air_conditioning | cooling,
130: storage unit, 120: shaft cover.

Claims (2)

An air conditioning casing for flowing air;
A rotating shaft that is arranged so as to intersect the air flow direction in the air conditioning casing and is rotatably supported, and a plate that is formed so as to protrude from the rotating shaft and opens and closes the air flow path by rotation. A door comprising a door body,
The plate door main body and the axial side walls of the air conditioning casing project from the side walls in the axial direction of the air conditioning casing, and the air flow path is closed when the door is positioned at one end of the operation area of the door. First and second sealing ribs for sealing between
It is formed so as to cover from the air downstream side of the rotary shaft between the axial side walls of the air conditioning casing, and when the door is located at one end of the door operation region, In an air conditioner comprising a shaft cover portion that shields air from leaking into the air flow path,
The rotary shaft is provided between both side walls in the axial direction of the air conditioning casing, and the rotary shaft is disposed between one end portion of the operation region and the plate door body when the plate door is located in an intermediate region of the operation region. A shielding plate formed so as to cover from the air upstream side;
A storage portion that is formed so as to cover the shielding plate in the plate-like door, and stores the shielding plate;
Air-conditioning system, characterized in that it comprises. The storage in the portion, air conditioning system of claim 1, wherein a sealing member for sealing said shielding plates are provided.

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