JP2009208748A - Vehicular air-conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular air-conditioner blocking condensed water leaking from an air-conditioning case to an air distribution unit side. <P>SOLUTION: A water storage part 12a is provided on a lower side in the right direction of an evaporator 20 on an air inlet 12c side. A first damming part 70 which is arranged on the forward side of a vehicle of the water storage part 12a, and extends in the direction across the air flow from the air inlet 12c and dams the condensed water flowing out from the water storage part 12a, first and second bottom parts 70a, 70b having the inclination with the gradient directions of bottom surfaces being different from each other between the upstream and downstream sides of the air flow of the first damming part 70, and a first water passage 81 for allowing the condensed water flowing out from the water storage part 12a toward the first damming part 70 side, are provided on a bottom side 14a of a lower case 12. The condensed water leaking out from the air-conditioning case to the air distribution unit side is blocked thereby. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vehicle air conditioner including an air conditioning case in which a cooling heat exchanger is accommodated, and particularly relates to prevention of leakage of condensed water from a lower case to a blower unit.

  Conventionally, what is shown to patent document 1 is known as this kind of vehicle air conditioner, for example. That is, in this apparatus, an air conditioning case configured by combining an upper case and a lower case, a heat exchanger for cooling disposed in the air conditioning case, and a bottom surface of the lower case are formed for cooling. It is comprised from the water reservoir part which stores the condensed water which fell from the heat exchanger, and the drainage hole which discharges the condensed water which accumulates in this water reservoir part.

  Also, on the bottom surface of the lower case, there are a protrusion that blocks the condensed water flowing out from the water reservoir, and a water channel that flows the condensed water that flows toward the protrusion toward the reservoir toward the water reservoir while bypassing the protrusion. Is provided.

As a result, even when the vehicle turns suddenly to the left or right, the dammed portion makes it difficult for the condensed water to flow out of the water reservoir, so the condensed water is less likely to leak from the fitting portion between the upper case and the lower case. Yes. And since the condensed water which flows into the protrusion part side toward a water reservoir part can be made to bypass a protrusion part and can be made to flow into a water reservoir part by a water channel, the drainage property of condensed water can be maintained.
JP 2007-118754 A

  However, in the configuration as in the above-mentioned Patent Document 1, when an air inflow port for introducing the blown air from the blower unit is formed on one side surface of the air conditioning case in the vicinity of the water reservoir, the drainage is performed after the vehicle turns. It was found that the condensed water that was not drained from the holes generally collected on the bottom surface near the protrusion.

  Further, in this state, it has also been found that when the vehicle suddenly turns to the left or right again, the condensed water accumulated on the bottom surface near the protrusion flows into the blower unit.

  Then, the objective of this invention is providing the vehicle air conditioner which can interrupt | block the condensed water which leaks from the air-conditioning case to the ventilation unit side.

In order to achieve the above object, the following technical means are adopted. That is, in the invention according to claim 1, the air conditioning case (10) configured by combining the upper case (11) and the lower case (12) and forming an air passage through which air flows toward the vehicle interior, A cooling heat exchanger (20) for cooling the air disposed in the air conditioning case (10), and formed on one side of the air conditioning case (10), flows the blown air from the blower unit (2). An air inflow port (12c), and the blown air introduced from the air inflow port (12c) is guided from at least one side of the vehicle left-right direction to the vehicle front side of the cooling heat exchanger (20), The cooling heat exchanger (20) is disposed so as to pass from the side to the vehicle rear side, and the condensed water dripped from the cooling heat exchanger (20) is disposed on the bottom surface (14) of the lower case (12). The water reservoir (12a) A moving vehicle air-conditioning apparatus reservoir and a drainage hole for discharging condensed water accumulated in (12b) (12b) are provided,
The water reservoir (12a) is provided below one side in the left-right direction of the cooling heat exchanger (20) on the air inlet (12c) side, and is provided on the bottom surface (14) of the lower case (12). The condensate flowing out of the water reservoir (12a) is disposed on the vehicle front side of the water reservoir (12a), extends in a direction intersecting the air flow of the blown air flowing in from the air inlet (12c), and flows out of the water reservoir (12a). A first damming portion (70) for damming and first and second gradient directions in which the gradient directions of the upstream and downstream sides of the air flow of the first damming portion (70) are different from each other. And a water channel (81) for flowing condensed water flowing out from the water reservoir (12a) toward the first damming portion (70).

  According to the present invention, by providing the first damming portion (70), when the vehicle turns sharply, the condensed water flowing out from the water reservoir (12a) is dammed by the first damming portion (70). Can be stopped. Thereby, the condensed water which leaks from the air-conditioning case (10) to the ventilation unit (2) side can be shut off. In addition, by providing the first and second bottom surface portions (70a, 70b) having different inclinations, the condensed water blocked by the first damming portion (70) is surely stored in the water reservoir (12a). ).

  In the invention according to claim 2, the first bottom surface portion (70a) provided on the downstream side of the air flow of the first damming portion (70) is formed with an inclination that becomes lower as it approaches the water reservoir portion (12a). It is characterized by being. According to this invention, the condensed water blocked by the first damming portion (70) can be more reliably returned to the water reservoir (12a).

  In the invention according to claim 3, the first damming portion (70) protrudes upward from the bottom surface (14) of the lower case (12) and extends in the front-rear direction, from the water reservoir (12a). A first front and rear wall portion (71) for blocking the flowing out condensed water, and an L-shape projecting upward from the bottom surface (14) of the lower case (12) to the first front and rear wall portion (71). And first left and right wall portions (72) extending in the direction.

  According to this invention, by providing at least the first front and rear wall portions (71) and the first left and right wall portions (72), the condensed water that has flowed out of the water reservoir portion (12a) when the vehicle suddenly turns. Can be blocked by the first blocking section (70).

  In the invention according to claim 4, there are provided second left and right wall portions (73) that protrude upward from the bottom surface (14) of the lower case (12) and extend in the left-right direction. The wall part (73) has a predetermined distance from the first left and right wall part (72) and extends perpendicularly to the first front and rear wall part (71). . According to this invention, by providing two damming portions, the condensed water flowing out from the water reservoir (12a) can be more reliably dammed.

  In the invention according to claim 5, the bottom case (14) of the lower case (12) is arranged on the upstream side of the air flow of the first damming portion (70), and from the air inlet (12 c). A second damming portion (75) is provided that extends in a direction intersecting the air flow of the blown air that has flowed in and dams the condensed water flowing out from the first damming portion (70). The damming portion (75) protrudes upward from the bottom surface (14) of the lower case (12) and extends in the front-rear direction to dam the condensed water flowing out from the water reservoir (12a). (76) and a third left and right wall portion (77) projecting upward from the bottom surface (14) of the lower case (12) and extending in an L shape with respect to the second front and rear wall portion (76). ) And the second bottom surface portion (70b) provided on the upstream side of the air flow of the first damming portion (70). Te, gradient direction of the bottom surface is characterized by a third bottom surface portion having a different inclination to each other and (70c) are provided.

  According to this invention, by providing the second damming portion (75) on the upstream side of the first damming portion (70), the condensed water flowing out from the water reservoir (12a) can be removed from the first damming portion. (70) and the 2nd damming part (75) can dam more reliably.

  In the invention according to claim 6, the first damming portion (70) and the second damming portion (75) have a protrusion height from the bottom surface (14) from the vehicle rear side toward the vehicle front side. It is characterized by being formed to gradually increase. According to the present invention, since the protruding height in the direction of receiving the acceleration of the condensed water flowing out from the water reservoir (12a) is formed high, it is condensed from above the first and second damming portions (70, 75). It can prevent water from overflowing.

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

(First embodiment)
Hereinafter, the vehicle air conditioner in 1st Embodiment is demonstrated based on FIG. 1 thru | or FIG. FIG. 1 is an external view showing a schematic configuration of an air conditioning unit mounted in a vehicle interior. FIG. 2 is a cross-sectional view taken along the line AA shown in FIG. 1 and shows a schematic configuration of the air conditioning case. FIG. 3 is an explanatory diagram for explaining the flow of the blown air from the blower unit flowing in the evaporator disposed in the lower case. FIG. 4 is a plan view showing an arrangement relationship between a water reservoir and a damming portion formed in the lower case in the first embodiment. FIG. 5 is a perspective view of the first and second damming portions shown in FIG. 4 as viewed from the side.

  The air conditioning unit 1 according to the present embodiment is disposed from a substantially central portion in the vehicle left-right (width) direction to the passenger seat side inside an instrument panel (not shown) at the front of the vehicle interior. The up / down / left / right arrows shown in FIG. 1 indicate directions in a vehicle-mounted state. Therefore, the “front / rear direction” is the traveling direction of the vehicle when the air conditioning unit 1 is mounted on the vehicle, and the “left / right direction” is the left / right direction (vehicle width) when the air conditioning unit 1 is mounted on the vehicle. The “vertical direction” refers to a vertical direction when the air conditioning unit 1 is mounted on a vehicle.

  As shown in FIG. 1, the air conditioning unit portion 1 of the vehicle air conditioner is roughly divided into the air conditioning case 10 at the substantially central portion and the blower unit 2 that is offset to the passenger seat side inside the instrument panel. In addition, the air-conditioning unit part 1 of this embodiment is mounted in the vehicle by which the passenger seat side is arrange | positioned in the right direction of the driver's seat side.

  As is well known, the blower unit 2 includes an inside / outside air switching box 5 for switching and introducing outside air (vehicle outside air) or inside air (vehicle room air), and a centrifugal type fan that blows air introduced into the inside / outside air switching box 5. And a blower 6. The blower 6 includes a blower case 2a, a centrifugal fan (not shown), a blower motor (not shown), and the like.

  The blower case 2a is divided into upper and lower portions by a not-shown dividing surface (molding surface). An internal / external air switching box 5 is connected above the blower case 2a. The blower air of the blower unit 2 flows into the air inlet 12c formed on one side of the air conditioning case 10 on the downstream side of the air flow of the blower case 2a.

  The air conditioning case 10 is formed of a resin having elasticity such as polypropylene and high mechanical strength. Specifically, the air conditioning case 10 is divided into a plurality of divided case bodies 11, 12 for molding reasons, for reasons of assembling the air conditioning equipment in the case 10, and the like. The plurality of split case bodies 11 and 12 are configured to be fastened together.

  Here, for example, the upper case 11 and the lower case 12 divided into two parts are combined with each other. More specifically, the air conditioning case 10 is divided into a lower case 12 and an upper case 11 by a dividing surface (partitioning surface) not shown. Further, the upper case 11 is formed by dividing it into two right and left case bodies at a substantially central portion in the vehicle left-right (width) direction.

  The blown air that has flowed in from the air inlet 12c formed on one side surface of the air conditioning case 10 flows into the air inflow space 13 formed on the front side of the air conditioning case 10 as shown in FIG. On the vehicle rear side of the air inflow space 13, an evaporator 20 that forms a cooling heat exchanger is inclined in a vertical direction with a small inclination angle. That is, the upper side of the evaporator 20 is arranged to be inclined toward the vehicle front side.

  Accordingly, the blown air from the blower unit 2 flows into the air inflow space 13 from the air inlet 12c, and then passes through the evaporator 20 from the space 13 from the front side of the vehicle to the rear side of the vehicle. As is well known, the evaporator 20 is supplied with low-pressure refrigerant decompressed by a decompression device such as an expansion valve of a refrigeration cycle for vehicle air conditioning, and the low-pressure refrigerant absorbs heat from the blown air and evaporates, thereby blowing the blown air. It is designed to cool. The evaporator 20 is disposed across the left and right directions between the side walls in the air conditioning case 10.

  A drainage hole 12 b for discharging condensed water generated in the evaporator 20 is formed in the lowest part of the bottom surface portion of the lower case 12. The drain hole 12b is formed below one side with respect to the left-right direction of the evaporator 20. Here, a drainage hole 12 b is provided below the right side with respect to the left-right direction of the evaporator 20. That is, it is provided on the air inlet 12 c side of the bottom surface portion of the lower case 12.

  And the heater core 30 is arrange | positioned at the vehicle rear side (airflow downstream) of the evaporator 20. FIG. The heater core 30 is a heating heat exchanger that heats blown air using warm water (cooling water) of the vehicle engine as a heat source. The heater core 30 is also inclined in the same direction as the evaporator 20 with a small inclination angle and is arranged in the vertical direction.

  Between the evaporator 20 and the heater core 30, an air mix door 25 that adjusts the air volume ratio between the air volume that flows through the heater core 30 and the cool air flows and the warm air that passes through the heater core 30 and is heated is disposed. Has been. The air mix door 25 constitutes temperature adjusting means for adjusting the temperature of the conditioned air blown out into the passenger compartment by adjusting the air volume ratio.

  The air mix door 25 is driven by a rotating shaft 25a disposed above the heater core 30, and the rotating shaft 25a is driven by a temperature adjusting mechanism (an actuator such as a servo motor) provided outside the air conditioning case 10. . A cold air passage 31 that bypasses the heater core 30 is formed above the air mix door 25. A warm air passage 32 that passes through the heater core 30 is formed on the downstream side of the air flow of the heater core 30 (the vehicle rear side).

  The warm air that has passed through the warm air passage 32 is guided upward by the warm air guide wall 33 toward the air mixing unit 34. The air mixing unit 34 mixes the cold air from the cold air passage 31 and the hot air after passing through the heater core 30 to obtain a desired temperature.

  A face opening 35 is disposed at a vehicle rear side portion of the upper surface portion (downstream end portion of the air flow) of the air conditioning case 10, and a defroster opening 36 is disposed at a vehicle front side portion from the face opening 35. A foot opening 37 is disposed in a lower part of the vehicle rear side than the face opening 35.

  As is well known, the face opening 35 is an opening for blowing the conditioned air from the air mixing unit 34 toward the upper body of the occupant. The defroster opening 36 is an opening for blowing conditioned air from the air mixing unit 34 toward the inner surface of the vehicle windshield. The foot opening 37 is an opening for blowing the conditioned air from the air mixing unit 34 toward the feet of the passenger.

  The first blowing mode door 38 is a flat switching door that opens and closes the face opening 35, and the second blowing mode door 39 is a flat switching door that opens and closes the defroster opening 36. The blowing mode door 40 is a flat switching door that opens and closes the foot opening 37. The first, second, and third blowing mode doors 38, 39, and 40 are driven by rotary shafts 38a, 38a, and 40a that are disposed upstream of the openings 35, 36, and 37, respectively.

  The rotary shafts 38a, 38a, 40a have one axial end projecting outside the air conditioning case 10, and the projecting end is coupled to a door drive device via an appropriate coupling mechanism such as a link mechanism. Thereby, the operating force of the door drive device is transmitted to the rotary shafts 38a, 39a, 40a, and the first, second, and third blow-out mode doors 38, 39, 40 can be rotationally driven. Further, the door drive device for the first, second, and third blow-out mode doors 38, 39, and 40 may be configured by either an actuator mechanism that uses a servo motor or a manual operation mechanism that is manually operated by an occupant. Good.

  Next, the configuration of the lower case 12 of the air conditioning case 10 will be described. First, as shown in FIG. 3, the lower case 12 is connected to a terminal of the blower case 2a at an air inlet 12c on one side (right direction) of the vehicle front side. In the lower case 12, an air inflow space 13 is formed on the left side of the air inlet 12 c, and an evaporator 20 is disposed on the vehicle rear side of the air inflow space 13.

  Accordingly, the blown air from the blower case 2a flows into the air conditioning case 10 from the air inlet 12c in the direction of the arrow X1 shown in FIG. The blown air flowing in from the air inlet 12 c flows into the air inflow space 13. The blown air in the air inflow space 13 passes through the evaporator 20 from the vehicle front side to the vehicle rear side, and is blown out toward the air flow downstream side in the direction of the arrow Y1 shown in FIG.

  Therefore, as shown in FIG. 4, an inflow side air passage 15 that connects the air inlet 12 c and the air inflow space 13 is formed in the lower case 12. On the bottom surface 14 of the lower case 12, a rib 14 a for holding the evaporator 20, a rib 14 b for separating the inflow side air passage 15 and the air inflow space 13, and a water reservoir 12 a described later from the inflow side air passage 15. Ribs 14c and 14d for guiding the flow of water are formed on the sides.

  The ribs 14a protrude upward from the bottom surface 14 and extend in the left-right direction to form two rows. The protruding height of the rib 14 a is formed to hold the bottom of the evaporator 20. In addition, the evaporator 20 is arrange | positioned between the side walls formed in the left-right direction of the lower case 12. The rib 14b is formed so as to extend in a direction (front-rear direction) intersecting the inflow side air passage 15. The rib 14b is formed so as to protrude upward from the bottom surface 14 in the same manner as the rib 14a.

  The protruding height of the rib 14b is such that the portion disposed at the bottom of the evaporator 20 is formed at the same height as the rib 14a, and the portion serving as the boundary between the inflow side air passage 15 and the air inflow space 13 is from the rib 14a. Is also formed with a height protruding upward. In addition, the part used as the boundary of the inflow side air channel | path 15 and the air inflow space 13 is formed with the protrusion height which does not prevent the distribution | circulation of blowing air.

  The rib 14c extends from the rib 14b to the vehicle rear side. A rib 14d is formed on the right side of the rib 14c. The rib 14d is formed so as to guide the flow of water from the inflow side air passage 15 toward the water reservoir 12a described later. A first water channel 81 is formed between the rib 14c and the rib 14d. The first water channel 81 is a return path for condensed water that has flowed out of a water reservoir 12a described later. The ribs 14c and 14d are formed so as to protrude upward from the bottom surface 14 in the same manner as the ribs 14a and 14b described above.

  Further, a water reservoir 12a is provided on the right end side of the rib 14a in the bottom surface 14 of the lower case 12 (shaded portion shown in FIG. 4). A drain hole 12b for discharging condensed water to the outside is provided in the water reservoir 12a. The drain hole 12 b is provided in the lowest part of the bottom surface of the lower case 12. And the bottom face 14 of the lower case 12 is provided with an inclination so as to become lower as it approaches the water reservoir 12a.

  Also, in the water reservoir 12a, an inclination is provided so that the bottom surface 14 of the lower case 12 becomes lower as it approaches the drain hole 12b. Further, the first water channel 81 between the rib 14c and the rib 14d is also inclined so that the bottom surface 14 of the lower case 12 becomes lower as it approaches the water reservoir 12a.

  Therefore, the bottom surface 14 of the lower case 12 is configured such that the condensed water dropped (dropped) from the evaporator 20 is likely to collect in the water reservoir 12a. Further, when the condensed water accumulated in the water reservoir 12a flows out to the inflow side air passage 15 via the first water passage 81, the condensed water flowing out to the inflow side air passage 15 is transferred from the inflow side air passage 15 to the water reservoir portion. It becomes easy to flow to the 12a side.

  By the way, the first damming portion 70, the second damming portion 75, and the first damming portion 75 are arranged on the bottom surface 14 of the lower case 12 so that the condensed water from the water reservoir 12 a does not flow into the blower unit 2. A second left and right wall portion 73 provided alongside the damming portion 70 is disposed.

  For example, in the case of the air conditioning case 10 in which the air inflow port 12c is disposed at the right position on the vehicle front side (see FIG. 4) with respect to the water reservoir 12a, the condensed water temporarily accumulates in the water reservoir 12a. If the vehicle turns suddenly to the left in such a state, acceleration is applied in the right direction with respect to the condensed water, and it may flow into the inflow side air passage 15 from between the ribs 14c and 14d.

  And the condensed water which flowed out in the inflow side air channel | path 15 may flow out in the ventilation unit 2 further exceeding the air inflow port 12c. Therefore, in the present embodiment, the bottom surface 14 of the lower case 12 is provided with the first and second damming portions 70 and 75 and the first damming portion 70 for damming condensed water from the water reservoir 12a. A second left and right wall portion 73 is provided. The first and second damming portions 70 and 75 are disposed on the downstream side of the inflow side air passage 15.

  More specifically, the first damming portion 70 is disposed on the vehicle front side of the water reservoir 12a, and the second damming portion 75 is disposed on the upstream side of the air flow of the first damming portion 70. Yes. Moreover, the 1st and 2nd damming part 70 is arrange | positioned so that a protrusion part may be extended in the direction which cross | intersects with respect to the flow of the blowing air which flowed in from the air inflow port 12c, respectively.

  The first damming portion 70 protrudes upward from the bottom surface 14 of the lower case 12 and extends in the front-rear direction, and extends upward from the bottom surface 14 of the lower case 12. A first left and right wall part 72 that protrudes and extends in an L shape with respect to the first front and rear wall part 71 is provided.

  Furthermore, a second left and right wall portion 73 extending orthogonally to the first front and rear wall portion 71 is provided at a predetermined interval on the vehicle rear side of the first left and right wall portion 72. Yes. Note that the base portion on the vehicle rear side of the first front and rear wall portion 71 is connected to the vehicle front end of the rib 14d. A second water channel 82 is provided between the first left and right wall portions 72 and the wall portion 14 e of the inflow side air passage 15.

  Between the second water channel 82 and the first water channel 81, the bottom surface 14 of the lower case 12 is formed in an inclined shape. That is, the bottom surface 14 is inclined so that the condensed water easily flows from the second water channel 82 toward the first water channel 81. Here, the bottom surface from the second water channel 82 to the first water channel 81 is referred to as a first bottom surface portion 70a in the claims.

  The second damming portion 75 is a second front and rear wall that protrudes upward from the bottom surface 14 of the lower case 12 and extends in the front-rear direction, like the first damming portion 70. And a third left and right wall portion 77 projecting upward from the bottom surface 14 of the lower case 12 and extending in an L shape with respect to the second front and rear wall portion 76.

  The base portion of the second front and rear wall portion 76 on the vehicle front side is connected to the wall portion 14 e of the inflow side air passage 15. A third water channel 83 is provided between the third left and right wall portions 77 and the wall portion 14 f of the inflow side air passage 15. Between the third water channel 83 and the second water channel 82, the bottom surface 14 of the lower case 12 is formed in an inclined shape.

  That is, the bottom surface 14 is inclined so that the condensed water easily flows from the third water channel 83 toward the second water channel 82. In the claims, the bottom surface from the third water channel 83 to the second water channel 82 is referred to as a second bottom surface portion 70b.

  Thereby, the gradient direction of the bottom face 14 (70a, 70b) of the upstream of the air flow of the 1st damming part 70 and a downstream has a mutually different inclination. In other words, the first bottom surface portion 70a is formed to have an inclination that decreases from the vehicle front side toward the vehicle rear side, and the second bottom surface portion 70b has an inclination that decreases from the vehicle rear side toward the vehicle front side. Is formed.

  The bottom surface 14 on the upstream side of the second damming portion 75 is provided with an inclination so as to become lower as it approaches the third water channel 83. In other words, the bottom surface 14 of the second front and rear wall portion 76 on the upstream side of the air flow is formed to have an inclination that becomes lower from the vehicle front side toward the vehicle rear side. The bottom surface 14 is referred to as a third bottom surface portion 70c in the claims.

  Next, the protrusion height from the bottom face 14 of the 1st and 2nd damming parts 70 and 75 is demonstrated based on FIG. This protruding height is a height that can prevent the condensed water flowing out of the water reservoir 12a from overflowing from above the first and second front and rear wall portions 71 and 76 when the vehicle turns sharply. Yes. Moreover, the protruding heights of the first and second damming portions 70 and 75 are formed so as to gradually increase from the vehicle rear side toward the vehicle front side, as shown in FIG.

  As described above, when the vehicle suddenly turns to the left, acceleration is applied to the condensed water in the direction of the arrow X2 shown in FIG. The height is gradually increased toward the side. In addition, it is desirable that the protruding heights of the first to third left and right wall portions 72, 73, 77 are set to the protruding height of the adjacent first or second front and rear wall portions 71, 76. Further, the protruding height of the second damming portion 75 may be formed to be generally lower than that of the first damming portion 70.

  The ribs 14a to 14d, the wall portions 14e and 14f, the first and second damming portions 70 and 75, the first to third bottom surface portions 70a to 70c, and the first to third portions configured as described above. The water channels 81 to 83 are formed integrally with the bottom surface 14 of the lower case 12.

  Next, the operation of this embodiment will be described with reference to FIG. First, during the cooling operation of the vehicle air conditioner, the condensed water attached to the evaporator 20 falls on the bottom surface 14 of the lower case 12. The condensed water falling on the bottom surface 14 of the lower case 12 flows toward the water reservoir 12a. The condensed water that has flowed into the water reservoir 12a flows into the drain hole 12b. And it is discharged | emitted from the drain hole 12b outside.

  Here, when the amount of condensed water flowing into the water reservoir 12a is large, the condensed water is temporarily accumulated in the water reservoir 12a until the condensed water is discharged from the drain hole 12b. At this time, when the vehicle suddenly turns to the left side with the condensed water accumulated in the water reservoir 12a, acceleration is applied to the condensed water, and the condensed water flows out from the water reservoir 12a into the first water channel 81. There is.

  However, since the first damming portion 70 and the second left and right wall portions 73 are provided on the downstream side (the vehicle front side) of the first water channel 81, the first damming portion 70 and the second damming portion 70 are provided. The left and right wall portions 73 are dammed up.

  Specifically, the first and second left and right wall portions 72 and 73 and the first front and rear wall portions 71 are dammed up. The so-called projections of the wall portions 71, 72, and 73 block the condensed water. Further, the condensed water that has passed through the first damming portion 70 and has flowed into the second water channel 82 is further dammed by the second damming portion 75. In other words, the second front and rear wall portions 76 and the third left and right wall portions 77 are dammed up.

  Thus, even if the condensed water that has flowed out of the water reservoir 12a reaches the second water channel 82, it is blocked by the second damming portion 75, so that the condensed water from the water reservoir 12a is third. The water channel 83 is never reached. Therefore, even if the vehicle turns sharply to the left side, the condensed water flowing out from the water reservoir 12a is less likely to flow from the first water channel 81 to the air inlet 12c side. Condensate does not leak.

  Here, even if there is a slight amount of condensed water flowing out to the third water channel 83, the third bottom surface portion 70c is formed in an inclined shape on the upstream side of the second damming portion 75. The air does not flow into the air inlet 12c. Moreover, the condensed water blocked by the first and second blocking portions 70 and 75 is returned to the water reservoir 12a side by the first and second bottom surface portions 70a and 70b.

  According to the vehicle air conditioner of the first embodiment configured as described above, by providing the first damming portion 70, the second damming portion 75, and the second left and right wall portions 73, from the water reservoir 12a. Can be more reliably dammed up.

  Further, by providing the first damming portion 70 with the second left and right wall portions 73, the condensed water flowing out from the water reservoir 12 a can be removed from the first and second left and right wall portions 72 and 73 and the first front and rear walls. It can be dammed by the protrusion of the portion 71. Therefore, the condensed water leaking from the air conditioning case 10 to the blower unit 2 side can be blocked.

  In addition, the condensed water blocked by the first and second damming portions 70 and 75 by providing water channels that connect the water reservoir 12a to the first water channel 81, the second water channel 82, and the third water channel 83. Can be easily returned to the water reservoir 12a.

  Further, the bottom surface 14 from the first water channel 81 to the third water channel 83 is provided with first to third bottom surface portions 70a, 70b, 70c having inclinations, so that the first and second damming portions are provided. The condensed water blocked by 70 and 75 can be more reliably returned into the water reservoir 12a.

(Second Embodiment)
In the first embodiment described above, the second left and right wall portions 73 provided alongside the first damming portion 70, the second damming portion 75, and the first damming portion 70 on the bottom surface 14 of the lower case 12. Of these damming portions, the second damming portion 75 may not be provided. FIG. 6 is a plan view showing the arrangement relationship between the water reservoir and the damming portion formed in the lower case in the present embodiment.

  In the present embodiment, as shown in FIG. 6, the first damming portion 70 and the second left and right wall portions 73 provided alongside the first damming portion 70 are provided on the bottom surface 14 of the lower case 12. Is provided. Even in such a configuration, when the vehicle suddenly turns to the left in a state where the condensed water is accumulated in the water reservoir 12a, the condensed water is discharged from the water reservoir 12a into the first water channel 81 as in the first embodiment. May be drained.

  However, the condensed water can be dammed by the first damming portion 70 and the second left and right wall portions 73 on the downstream side (vehicle front side) of the first water channel 81. Therefore, the condensed water leaking from the air conditioning case 10 to the blower unit 2 side can be blocked.

  Even if there is a slight amount of condensed water that has flowed out into the second water channel 82, the second bottom surface 70b is formed on the upstream side of the first damming portion 70 in an inclined manner. There is no flow into the inlet 12c. Moreover, the condensed water blocked by the first damming portion 70 and the second left and right wall portions 73 is returned to the water reservoir 12a side by the first bottom surface portion 70a.

(Third embodiment)
In the present embodiment, at least only the first damming portion 70 may be provided on the bottom surface 14 of the lower case 12. FIG. 7 is a plan view showing the positional relationship between the water reservoir and the damming portion formed in the lower case in the present embodiment. In the present embodiment, as shown in FIG. 7, a first damming portion 70 is provided on the bottom surface 14 of the lower case 12.

  Even in such a configuration, when the vehicle suddenly turns to the left side in the state where the condensed water is accumulated in the water reservoir 12a, the condensed water is first from the water reservoir 12a as in the first and second embodiments. May flow out into the water channel 81.

  However, it can be dammed by the first damming portion 70 on the downstream side (vehicle front side) of the first water channel 81. Thereby, the condensed water which leaks from the air-conditioning case 10 to the ventilation unit 2 side can be interrupted. Even if there is a slight amount of condensed water that has flowed out into the second water channel 82, the second bottom surface 70b is formed on the upstream side of the first damming portion 70 in an inclined manner. There is no flow into the inlet 12c.

(Other embodiments)
In the above embodiment, the 1st and 2nd damming parts 70 and 75 were arrange | positioned in the downstream of the inflow side air path 15, but it is not restricted to this, The inflow side of the upstream rather than the above embodiment It may be disposed in the air passage 15.

  In the above embodiment, the air inlet 12c, the first and second damming portions 70 and 75, and the water reservoir 12a are arranged on the right side of the bottom surface 14 of the lower case 12, but the left side You may arrange | position the air inflow port 12c, the 1st and 2nd damming parts 70 and 75, and the water reservoir part 12a in the side.

  Moreover, in the above embodiment, as the vehicle air conditioner, the evaporator 20 and the heater core 30 are provided in the air conditioning case 10 so that the cooling and heating can be performed, but instead, only the cooling is performed. You may make it apply to the air conditioning apparatus only for cooling to implement.

It is an external view which shows schematic structure of the air-conditioning unit part mounted in the vehicle interior in 1st Embodiment. It is AA sectional drawing shown in FIG. It is explanatory drawing for demonstrating the flow of the ventilation air from the ventilation unit which flows into the evaporator arrange | positioned at the lower case in 1st Embodiment. It is a top view which shows the arrangement | positioning relationship of the water reservoir part and damming part which are formed in the lower case in 1st Embodiment. It is the perspective view which looked at the 1st and 2nd damming part shown in FIG. 4 from the side. It is a top view which shows the arrangement | positioning relationship of the water reservoir part and damming part which are formed in the lower case in 2nd Embodiment. It is a top view which shows the arrangement | positioning relationship of the water reservoir part and damming part which are formed in the lower case in 3rd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 2 ... Blower unit 10 ... Air-conditioning case 11 ... Upper case, division | segmentation case body 12 ... Lower side case, division | segmentation case body 12a ... Water reservoir 12b ... Drain hole 12c ... Air inlet 14 ... Bottom 20 ... Evaporator (heat exchange for cooling) vessel)
DESCRIPTION OF SYMBOLS 70 ... 1st damming part 70a ... 1st bottom face part 70b ... 2nd bottom face part 70c ... 3rd bottom face part 71 ... 1st front-and-back wall part 72 ... 1st left-right wall part 73 ... 2nd Left and right wall portion 75 ... second damming portion 76 ... second front and rear wall portion 77 ... third left and right wall portion 81 ... first water channel (water channel)

Claims (6)

An air conditioning case (10) configured by combining the upper case (11) and the lower case (12), and forming an air passage through which air flows toward the vehicle interior;
A cooling heat exchanger (20) disposed in the air conditioning case (10) for cooling air;
An air inlet (12c) that is formed on one side surface of the air conditioning case (10) and that receives the blown air from the blower unit (2);
The air blown in from the air inlet (12c) is guided from at least one side in the vehicle left-right direction to the vehicle front side of the cooling heat exchanger (20), and passes from the vehicle front side to the vehicle rear side. The cooling heat exchanger (20) is disposed on the bottom surface (14) of the lower case (12), and a water reservoir (12a) for collecting condensed water dripped from the cooling heat exchanger (20). ) And a drainage hole (12b) for discharging condensed water accumulated in the water reservoir (12b),
The water reservoir (12a) is provided below one side in the left-right direction of the cooling heat exchanger (20) on the air inlet (12c) side,
The bottom case (14) of the lower case (12) is disposed on the vehicle front side of the water reservoir (12a) and intersects with the air flow of the blown air flowing in from the air inlet (12c). A first damming portion (70) for damming condensed water flowing out from the water reservoir (12a), and an upstream side and a downstream side of the air flow of the first damming portion (70), The first and second bottom surface portions (70a, 70b) having different inclination directions of the bottom surface of the water and condensed water flowing out from the water reservoir portion (12a) are introduced to the first damming portion (70) side. A vehicle air conditioner characterized in that a water channel (81) is provided.   The first bottom surface portion (70a) provided on the downstream side of the air flow of the first damming portion (70) is formed with an inclination that becomes lower as it approaches the water reservoir portion (12a). The vehicle air conditioner according to claim 1.   The first damming portion (70) protrudes upward from the bottom surface (14) of the lower case (12) and extends in the front-rear direction, and dams the condensed water flowing out from the water reservoir (12a). A first front and rear wall portion (71) and a bottom surface (14) of the lower case (12) project upward and extend in an L shape with respect to the first front and rear wall portion (71). The vehicle air conditioner according to claim 1 or 2, further comprising a first left and right wall portion (72). Second left and right wall portions (73) projecting upward from the bottom surface (14) of the lower case (12) and extending in the left-right direction are provided,
The second left and right wall portions (73) extend at right angles to the first front and rear wall portions (71) with a predetermined distance from the first left and right wall portions (72). The vehicle air conditioner according to any one of claims 1 to 3, wherein the vehicle air conditioner is provided. The bottom case (14) of the lower case (12) is arranged on the upstream side of the air flow of the first damming portion (70), and the blown air flowing in from the air inlet (12c) A second damming portion (75) extending in a direction intersecting the air flow and damming the condensed water flowing out from the first damming portion (70) is provided;
The second damming portion (75) protrudes upward from the bottom surface (14) of the lower case (12) and extends in the front-rear direction, and dams the condensed water flowing out from the water reservoir (12a). A second front and rear wall portion (76) and a bottom surface (14) of the lower case (12) project upward and extend in an L shape with respect to the second front and rear wall portion (76). The gradient direction of the bottom surface is mutually opposite to the third left and right wall portions (77) and the second bottom surface portion (70b) provided on the upstream side of the air flow of the first damming portion (70). The vehicle air conditioner according to any one of claims 1 to 4, further comprising a third bottom surface portion (70c) having a different inclination.   In the first damming portion (70) and the second damming portion (75), the height of the protrusion from the bottom surface (14) is gradually increased from the vehicle rear side toward the vehicle front side. The vehicle air conditioner according to claim 3 or 5, wherein the vehicle air conditioner is formed.

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