JP2008068732A - Air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner capable of excellently discharging condensed water without using any packing member separate from a case. <P>SOLUTION: The air conditioner comprises a heat exchanger 13 for cooling which is arranged in a case 11 in an inclined manner with respect to a horizontal plane, and introduces air from a lower space 12 to a heat exchange core 13c, cools it, and leads the cooled air to an upper space 14, a lower rib 15 projecting from a part 11e located below the heat exchanger 13 for cooling in the case 11 to a face 13e on the upstream side of the air flow of the heat exchanger 13 for cooling, and an upper rib 19 projecting from a part 11e located below the heat exchanger 13 for cooling in the case 11 toward a face 13g on the downstream side of the air flow of the heat exchanger 13 for cooling. A lower space 16 for discharging water partitioned from the lower space 12 by the lower rib 15 is formed below the inclined lower end 13f of the heat exchanger 13 for cooling. An upper space 20 for discharging water partitioned from the upper space 14 by the upper rib 19 is formed above the inclined lower end 13f of the heat exchanger 13 for cooling. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a condensate drainage structure in an air conditioner in which air flows from a lower side to an upper side through a cooling heat exchanger arranged to be inclined with respect to a horizontal plane.

  2. Description of the Related Art Conventionally, in a vehicle air conditioner, in order to reduce a vehicle mounting space of an indoor unit portion, a cooling heat exchanger is disposed substantially horizontally in a resin case of the indoor unit portion, and the cooling heat exchanger There is known an arrangement in which the blown air flows from below to above (see, for example, Patent Document 1).

  And in patent document 1, the drainage structure for improving the drainage property of the condensed water which generate | occur | produces in the heat exchanger for cooling in this kind of horizontal installation type vehicle air conditioner is proposed. Specifically, the cooling heat exchanger is inclined at a slight angle from the horizontal plane, and a rib portion protruding upward from the bottom surface of the case located below the cooling heat exchanger is formed integrally with the case. Yes. As for this rib part, the longitudinal direction is the direction orthogonal to the inclination direction of the heat exchanger for cooling.

  Then, a packing member made of an elastic material is fitted and fixed to the upper end portion of the rib portion, and this packing member is brought into contact with a portion near the inclined lower end portion of the lower surface portion of the cooling heat exchanger. The rib portion and the packing member serve to partition the lower space of the cooling heat exchanger into a blower space and a drainage space.

  Here, the air blowing space is a space located on the inclined upper side (heat exchange core portion side) of the cooling heat exchanger with respect to the rib portion and the packing member, and the drainage space is more than the rib portion and the packing member. This is a space located on the inclined lower side (tank side) of the cooling heat exchanger.

  Thereby, since the tank part located in the inclination lower end part of the heat exchanger for cooling is located in the space for drainage, the air flow of the space for ventilation does not directly blow against the tank part. As a result, the condensed water collected in the tank portion located at the inclined lower end portion of the cooling heat exchanger can be smoothly dropped to the bottom surface of the case without blowing up with the wind pressure of the blown air.

  In Patent Document 1, a contact portion that contacts the heat exchanger for cooling is formed in a flat plate shape on the uppermost portion of the packing member, and a cross section that allows the contact portion to be displaced in the vertical direction below the contact portion. A pantograph-shaped cushion is provided.

Thus, when the packing member comes into contact with the cooling heat exchanger, the cushion portion is crushed and deformed, and the contact portion is not deformed. For this reason, even if the position of the cooling heat exchanger relative to the case shifts in the vertical direction due to dimensional variations due to the molding accuracy of the case, the cushion part absorbs this shift and the contact portion is good for the cooling heat exchanger. Can be contacted.
JP-A-2005-75022

  However, in the above prior art, since the packing member separate from the case is used, there is a problem that the number of parts increases and the cost increases.

  Although it is conceivable to eliminate the packing member as a countermeasure, there is a problem that the drainage of condensed water deteriorates if the packing member is simply abolished.

  That is, if the packing member is simply abolished, the displacement of the arrangement position of the cooling heat exchanger relative to the case cannot be absorbed, so a gap is generated between the rib portion and the lower surface portion of the cooling heat exchanger. Blown air enters the space for drainage.

  For this reason, the wind pressure of blowing air acts on the condensed water which collects in the tank part located in the inclination lower end part of the heat exchanger for cooling, and it becomes difficult for condensed water to fall.

  In view of the above points, an object of the present invention is to drain the condensed water well without using a packing member separate from the case.

To achieve the above object, the present invention comprises a case (11) that forms an air passage through which air flows,
It arrange | positions in a case (11) so that it may incline with respect to a horizontal surface, air is introduce | transduced into a heat exchange core part (13c) from lower space (12), and the air after cooling to upper space (14) A cooling heat exchanger (13) to be derived;
A lower rib portion protruding from a portion (11h) located below the cooling heat exchanger (13) in the case (11) toward the surface (13e) on the upstream side of the air flow of the cooling heat exchanger (13). (15) and
Upper rib portion protruding from the portion (11f) located above the cooling heat exchanger (13) in the case (11) toward the surface (13g) on the downstream side of the air flow of the cooling heat exchanger (13) (19)
The lower rib portion (15) forms a lower drainage space (16) partitioned from the lower space (12) below the inclined lower end (13f) of the cooling heat exchanger (13). ,
By the upper rib portion (19), the drainage upper space (20) partitioned from the upper space (14) is formed above the inclined lower end (13f) of the cooling heat exchanger (13). It is characterized by that.

  According to this, by the lower rib portion (15), the lower space for drainage (16) partitioned from the lower space (12) is formed below the inclined lower end (13f) of the cooling heat exchanger (13), Since the upper rib part (19) forms the upper drainage space (20) partitioned from the upper space (14) above the inclined lower end (13f) of the cooling heat exchanger (13), the lower drainage The space (16) and the drainage upper space (20) form a bag path-like space around the inclined lower end (13f) of the cooling heat exchanger (13).

  Therefore, between the lower rib portion (15) and the surface (13e) on the upstream side of the air flow of the cooling heat exchanger (13), and between the upper rib portion (19) and the cooling heat exchanger (13). Even if there is a gap between the surface (13g) on the downstream side of the air flow, the blown air hardly flows into the lower drainage space (16) and the upper drainage space (20). In other words, the blown air is prevented from entering the lower drainage space (16).

  As a result, it is possible to suppress the wind pressure of the blown air from acting on the condensed water gathering at the inclined lower end (13f) of the cooling heat exchanger (13), so that the condensed water can be smoothly dropped downward. .

  In short, according to the present invention, the lower rib portion (15) is not brought into contact with the air flow upstream surface (13e) of the cooling heat exchanger (13), and the upper rib portion (19) is used for cooling. Since the condensed water can be drained well without being brought into contact with the surface (13 g) on the downstream side of the air flow of the heat exchanger (13), the condensed water can be drained well without using a separate packing member from the case (11). it can.

  Specifically, in the present invention, since the lower rib portion (15) and the upper rib portion (19) are integrally formed with the case (11), the lower rib portion (15) and the upper rib are not costly increased. A part (19) can be provided.

Further, in the present invention, specifically, the clearance (17) between the projecting tip (15a) of the lower rib (15) and the surface (13e) on the upstream side of the air flow is set within 3 mm,
If the clearance (21) between the projecting tip (19a) of the upper rib (19) and the surface (13g) on the downstream side of the air flow is set to 3 mm or less, the air is discharged into the lower space (16) for drainage. It has been found that the intrusion of water can be effectively suppressed, and the condensed water can be drained better.

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

  Hereinafter, an embodiment of the present invention will be described. FIG. 1 shows a part of an air conditioning unit 10 that houses a heat exchanger part among indoor unit parts in a vehicle air conditioner according to a first embodiment of the present invention. The arrow indicates the direction in the vehicle mounted state. The indoor air-conditioning unit 10 is mounted, for example, at the center in the vehicle left-right (width) direction inside an instrument panel (instrument panel) arranged at the foremost part in the vehicle interior.

  The indoor unit of the vehicle air conditioner is roughly divided into an air conditioning unit 10 and a blower unit (not shown). The blower unit is disposed offset to the passenger seat side (the left side of the vehicle in the case of a right-hand drive vehicle) with respect to the air conditioning unit 10, and is configured to switch between outside air (outside air in the vehicle interior) or inside air (inside the vehicle interior) and And a centrifugal blower for blowing air introduced into the inside / outside air switching box. The blower air of the blower unit flows into the blower space 12 in the lowermost part of the case 11 from an inflow port (not shown) provided on the lower passenger seat side surface of the case 11 of the air conditioning unit 10. It has become. In addition, the ventilation space 12 corresponds to the lower space in the present invention.

  The air-conditioning case 11 of the indoor air-conditioning unit 10 is a resin molded product. In this embodiment, as shown in FIG. The case 11a and the lower case 11b are divided and molded. Further, the upper case 11a is formed by being divided into a left divided case and a right divided case. These divided cases are integrally fastened by fastening means such as screws and clips (not shown).

  In the case 11 of the air conditioning unit 10, an evaporator 13, which is a heat exchanger for cooling, is disposed substantially horizontally with a small inclination angle θ above the blower space 12. In the present embodiment, the evaporator 13 is inclined so that the front side in the vehicle front-rear direction is lowered, and the inclination angle θ is, for example, about 15 °.

  Accordingly, the blown air of the blower unit flows into the blower space (lower space) 12, then passes through the evaporator 13 from below to above as indicated by an arrow a, and flows into the upper space 14 of the evaporator 13. As is well known, low-pressure refrigerant decompressed by a decompression device such as an expansion valve of a refrigeration cycle for vehicle air conditioning flows into the evaporator 13, and the low-pressure refrigerant absorbs heat from the blown air and evaporates.

  FIG. 2 shows the structure of the evaporator 13, and a thin metal plate having excellent corrosion resistance such as aluminum is laminated in the horizontal direction in the figure to constitute a tube 13a through which a refrigerant flows, and a corrugated fin 13b is interposed between the tubes 13a. Is a laminated type that constitutes the heat exchange core portion 13c that cools the air. And the tank part 13d which distributes a refrigerant | coolant to the some tube 13a, or a refrigerant | coolant merges from the some tube 13a is arrange | positioned at the both ends side of this core part 13c.

  The support structure for the case 11 of the evaporator 13 will be described. The partition wall 11c protruding forward from the inner wall of the case 11 on the vehicle rear side above the tank portion 13d on the upper side of the inclination of the evaporator 13 is directed downward. A protruding support portion 11d is formed, and a crank-like support portion 11e having a crank-like cross section is formed in a lower portion of the lower case 11b below the inclined tank portion 13d.

  And the tank part 13d of the inclination upper side is pinched | interposed into the up-down direction via the packing P between the protrusion-shaped support part 11d and the crank-shaped support part 11e.

  On the other hand, on the guide wall 11f that protrudes from the inner wall of the case 11 on the front side of the vehicle above the tank portion 13d on the lower side of the evaporator 13 in the evaporator 13 to the guide wall 11f that protrudes upward, the protruding support portion 11g that protrudes downward. The case bottom surface 11h located below the evaporator 13 is formed with a protruding support portion 11i protruding upward. A plurality of protruding support portions 11i are formed in the vehicle width direction, and a gap having a predetermined dimension is provided between the adjacent protruding support portions 11i.

  And the tank part 13d of the inclination downward side is pinched | interposed into the up-down direction via the packing P by both the projecting support parts 11g and 11i. Thus, the evaporator 13 is supported with respect to the case 11 by sandwiching both tank portions 13d in the vertical direction of the case 11.

  A lower rib portion 15 is formed on the case bottom surface 11h so as to protrude toward the air flow upstream (downward) surface 13e of the core portion 13c of the evaporator 13. The lower rib portion 15 has a longitudinal direction that is orthogonal to the inclination direction b of the evaporator 13 (direction c in FIG. 2), and is formed in the case 11 over the entire region in the vehicle width direction.

  The protruding tip portion 15a of the lower rib portion 15 is disposed at a portion near the inclined lower end portion 13f of the evaporator 13 in the inclined direction b. More specifically, the protruding tip portion 15a of the lower rib portion 15 has a minute distance (for example, about 5 to 15 mm) from the boundary between the core portion 13c of the evaporator 13 and the tank portion 13d on the inclined lower side in the inclination direction b. ) At a position shifted toward the core portion 13c side (inclined upper side).

  By the lower rib portion 15, a drainage lower space 16 partitioned from the air blowing space 12 is formed below the inclined lower end portion 13 f of the evaporator 13.

  FIG. 3 is an enlarged view of part A in FIG. A gap 17 having a predetermined dimension (in this example, 3 mm or less) is set between the protruding tip portion 15a of the lower rib portion 15 and the air flow upstream (lower side) surface 13e of the core portion 13c of the evaporator 13. Yes.

  A drain outlet 18 is disposed in the forefront portion of the case bottom surface 11 h, and the case bottom surface 11 h is inclined so as to become lower toward the drain port 18.

  An upper rib portion 19 is formed on the guide wall 11f above the evaporator 13 and on the front side of the vehicle so as to protrude toward the surface 13g on the downstream side (upper side) of the air flow of the core portion 13c of the evaporator 13.

  The upper rib portion 19 has a longitudinal direction that is perpendicular to the inclination direction b of the evaporator 13 (direction c in FIG. 2), and is formed in the case 11 over the entire region in the vehicle width direction.

  The protruding tip 19a of the upper rib portion 19 is disposed at a portion near the inclined lower end 13f of the evaporator 13 in the inclination direction b. More specifically, the protruding tip portion 19a of the upper rib portion 19 has a minute distance (for example, about 5 to 15 mm) from the boundary between the core portion 13c of the evaporator 13 and the tank portion 13d on the lower side of the inclination in the inclination direction b. ) At a position shifted toward the core portion 13c side (inclined upper side).

  By the upper rib portion 19, a drainage upper space 20 partitioned from the upper space 14 is formed above the inclined lower end portion 13 f of the evaporator 13.

  A gap 21 having a predetermined dimension (within 3 mm in this example) is set between the protruding tip 19a of the upper rib 19 and the surface 13g of the core 13c of the evaporator 13 on the downstream side of the air flow.

  The drainage lower space 16 partitioned by the lower rib portion 15 and the drainage upper space 20 partitioned by the upper rib portion 19 constitute a bag path-like space surrounding the periphery of the inclined lower end portion 13 f of the evaporator 13.

  In this example, the position in the inclination direction b of the protruding tip portion 19a of the upper rib portion 19 is set to the upper side of the inclination than the position in the inclination direction b of the protruding tip portion 15a of the lower rib portion 15. The position of the protruding tip portion 19a of the upper rib portion 19 in the inclination direction b may be the same position as the position of the protruding tip portion 15a of the lower rib portion 15 in the inclination direction b or the protruding tip portion 15a of the lower rib portion 15. You may set to the inclination downward side rather than the position in the inclination direction b.

  In the air conditioning case 11, the heater core 22 is disposed on the downstream side of the air flow of the evaporator 13, that is, on the upper side of the evaporator 13. The heater core 22 heats air using hot water (cooling water) from a vehicle engine (not shown) as a heat source.

  The heater core 22 is a substantially rectangular thin shape having substantially the same vehicle width direction dimensions as the air conditioning case 11, and is arranged so that the upper end portion is inclined toward the vehicle front side.

  A plate-shaped air mix door 23 is disposed on the vehicle front side of the heater core 22. This air mix door 23 is comprised from the plate door hold | maintained rotatably at the air-conditioning case 11 by the rotating shaft 23a.

  In the air conditioning case 11, a cold air bypass passage 24 is formed on the vehicle front side of the heater core 22 to flow the cold air cooled by the evaporator 13 by bypassing the heater core 22 as indicated by an arrow d. On the other hand, in the air conditioning case 11, a hot air passage 25 through which hot air heated by the heater core 22 flows as shown by an arrow e is formed in an upper portion of the heater core 22.

  An air mixing portion 26 that can mix hot air and cold air well is formed above the heater core 22 and downstream of the cold air bypass passage 24 and the hot air passage 25.

  In FIG. 1, the solid line position of the air mix door 23 is the maximum cooling position where the air passage of the heater core 22 is fully closed and the cold air bypass passage 24 is fully opened. Further, the two-dot chain line position is a maximum heating position where the cold air bypass passage 24 is fully closed and the ventilation path of the heater core 22 is fully opened.

  As is well known, the air mix door 23 adjusts the air volume ratio between the hot air passing through the heater core 22 (arrow e) and the cold air passing through the heater core 22 and passing through the cold air bypass passage 24 (arrow d) to enter the vehicle interior. It is a temperature adjusting means for adjusting the blown air temperature. Then, the hot air (arrow e) and the cold air (arrow d) are mixed in the air mixing unit 26 to obtain air having a desired temperature.

  On the other hand, a face opening 27 is opened on the vehicle rear side in the upper part of the air conditioning case 11, and a defroster opening 28 is opened on the vehicle front side of the face opening 27. A face passage 29 extending from the air mixing unit 26 toward the face opening 27 is formed in the air conditioning case 11.

  The face opening 27 blows out air toward the occupant's face through a face duct (not shown). A defroster duct (not shown) is connected to the defroster opening 28, and air is blown out from the defroster outlet at the tip of the defroster duct toward the inner surface of the front window glass of the vehicle.

  A defroster door 30 that switches between the defroster opening 28 and the face passage 29 is disposed above the air conditioning case 11. The defroster door 30 is a cantilever door in which a rotary shaft 30a is integrally arranged at one end in the door length direction.

  In FIG. 1, the solid line position of the defroster door 30 indicates the position in the face mode, the bi-level mode, or the foot mode in which the defroster opening 28 is fully closed and the face passage 29 is fully opened. On the other hand, the two-dot chain line position of the defroster door 30 indicates a defroster mode position where the face passage 29 is fully closed and the defroster opening 28 is fully opened.

  Further, a foot passage 31 is formed in the air conditioning case 11 on the vehicle rear side of the hot air passage 25. The foot passage 31 is formed so as to hang downward from the face passage 29 side.

  Of the foot passage 31, the portion on the face passage 29 side opens almost entirely into the face passage 29 to form a foot opening 32.

  The foot passage 31 is formed in the case 11 so as to extend over the entire region in the vehicle width direction. A foot duct (not shown) that hangs downward is further connected to the downstream end (lower end) 33 of the foot passage 31, and air flows from the foot outlet at the lower end of the foot duct to the foot of the front seat occupant. Is supposed to blow out.

  A face door 34 that switches between the face opening 27 and the foot opening 32 is disposed above and behind the air conditioning case 11. The face door 34 is a cantilever door in which a rotating shaft 34a is integrally disposed at one end in the door length direction.

  In FIG. 1, the solid line position of the face door 34 indicates a foot mode position where the face opening 27 is fully closed and the foot opening 32 of the foot passage 31 is fully opened. On the other hand, the two-dot chain line position of the face door 34 indicates the position in the face mode in which the foot opening 32 of the foot passage 31 is fully closed and the face passage 29 is fully opened.

  Next, the operation of the present embodiment in the above configuration will be described. As described above, the blown air of the blower unit flows into the lower space 12 and then passes through the evaporator 13 from below to above as indicated by an arrow a. , Flows to the upper space 14 of the evaporator 13. At this time, the blown air is absorbed by the evaporator 13.

  When the temperature of the blown air falls below the dew point temperature due to the heat absorption of the evaporator 13, moisture in the blown air is generated in the core portion 13 c of the evaporator 13 as condensed water.

  This condensed water collects on the surface 13e on the upstream side of the air flow of the core portion 13c of the evaporator 13 by its own weight. Further, the condensed water tends to fall into the lower space 12 due to its own weight, but since the blown air is flowing in the direction opposite to the falling direction, that is, upward from below the evaporator 13, it cannot fall in the lower space 12. For this reason, the condensed water flows along the surface 13e on the upstream side of the air flow toward the inclined lower end portion 13f of the evaporator 13 as indicated by an arrow w1.

  Then, the condensed water flows downward in the inclined direction b from the lower rib portion 15 and enters the lower drainage space 16.

  Here, since the drainage lower space 16 and the drainage upper space 20 form a bag path-like space surrounding the periphery of the inclined lower end portion 13 f of the evaporator 13, the drainage lower space 16 and the drainage upper space 20. It is difficult for the air to flow through. In other words, the blown air is prevented from entering the lower drainage space 16. For this reason, since the blown air does not hit the condensed water in the draining lower space 16, the condensed water falls to the case bottom surface 11h.

  Then, the condensed water that has dropped onto the case bottom surface 11 h in the drainage lower space 16 flows to the drainage port 18 through the gap between the protruding support portions 11 i and is drained from the drainage port 18.

  By the way, in this embodiment, the clearance gap 17 is set between the protrusion tip part 15a of the lower rib part 15, and the surface 13e of the air flow upstream side of the core part 13c of the evaporator 13, and the protrusion tip part of the upper rib part 19 is set. A gap 21 is set between 15a and the surface 13g of the core 13c of the evaporator 13 on the downstream side of the air flow.

  That is, although the lower rib portion 15 and the upper rib portion 19 are not in contact with the evaporator 13, the intrusion of the blown air into the lower drain space 16 can be suppressed and the condensed water can be drained well.

  For this reason, since it is not necessary to use a packing member (elastic material) separate from the case as in the prior art, the cost can be reduced.

  Further, since the lower rib portion 15 and the upper rib portion 19 can be integrally formed with the case 11, the lower rib portion 15 and the upper rib portion 19 can be provided without increasing the cost.

  In addition, according to the inventor's more detailed examination, if the gaps 17 and 21 are set within 3 mm, the intrusion of the blown air into the lower drainage space 16 can be effectively suppressed, and the condensed water can be further reduced. It was found that it can be smoothly dropped onto the case bottom surface 11h.

(Other embodiments)
In the above-described embodiment, the lower rib portion 15 and the upper rib portion 19 are integrally formed with the case 11. However, the lower rib portion 15 and the upper rib portion 19 are formed separately from the case 11, such as screws. You may make it fix to case 11 using a fixing means.

  In the above embodiment, an example in which the stacked evaporator 13 is arranged has been shown. However, the shape of the evaporator 13 is not limited to this, and a multi-hole flat tube is bent and formed in a meandering shape. Other types such as a so-called surpain type in which corrugated fins are combined with each other may be used.

  In the above-described embodiment, the example in which the evaporator 13 is arranged so that the tank portion 13d forms the inclined lower end portion 13f is shown. However, the single tank type in which the tank portion 13d is located only at the inclined upper end portion. Also, the present invention can be applied. Furthermore, it is natural that the present invention can be applied to a single tank type in which the tank portion 13d is arranged to be the inclined lower end portion 13f.

  In the above-described embodiment, the evaporator 13 is disposed in the case 11 with a slope that lowers the front side of the vehicle. However, the evaporator 13 is disposed with a slope that lowers the rear side of the vehicle. Also good. Moreover, the arrangement | positioning which inclines in the vehicle left-right direction may be sufficient.

  Moreover, in the said one Embodiment, although the inclination angle of the evaporator 13 showed 15 degrees, the inclination angle is not restricted to 15 degrees.

  Moreover, although the said one Embodiment demonstrated the example in which the inflow direction (the front side of the paper surface of FIG. 1 of FIG. 1) and the direction where the tube 13a of the evaporator 13 extends orthogonally crosses in the ventilation space 12, These may be in the same direction.

It is a schematic sectional drawing of the air-conditioning unit by one Embodiment of this invention. It is a perspective view which illustrates the composition of the evaporator in one embodiment of the present invention. It is the A section expanded sectional view in FIG.

Explanation of symbols

11 ... Case, 11f ... Guide wall (portion located above),
11h ... bottom of the case (portion located below), 12 ... lower space,
13 ... Evaporator (cooling heat exchanger), 13c ... Heat exchange core,
13e ... Air flow upstream surface, 13f ... Inclined lower end, 13f ... Air flow downstream surface,
14 ... Upper space, 15 ... Lower rib part, 15a ... Projection tip part, 16 ... Lower space for drainage,
17 ... Gap, 19 ... Upper rib part, 19a ... Projection tip part, 20 ... Upper space for drainage,
21 ... Gap.

Claims (3)

A case (11) forming an air passage through which air flows;
It arrange | positions in the said case (11) so that it may incline with respect to a horizontal surface, the said air is introduce | transduced into a heat exchange core part (13c) from lower space (12), and air after cooling is upper space (14). Cooling heat exchanger (13) leading to
The case (11) projects from a portion (11h) located below the cooling heat exchanger (13) toward the surface (13e) on the upstream side of the air flow of the cooling heat exchanger (13). A lower rib (15);
The case (11) projects from a portion (11f) located above the cooling heat exchanger (13) toward a surface (13g) on the downstream side of the air flow of the cooling heat exchanger (13). An upper rib portion (19),
The lower rib portion (15) forms a drainage lower space (16) partitioned from the lower space (12) below the inclined lower end (13f) of the cooling heat exchanger (13). And
The upper rib portion (19) forms a drainage upper space (20) partitioned from the upper space (14) above the inclined lower end (13f) of the cooling heat exchanger (13). The air conditioner characterized by becoming. The air conditioner according to claim 1, wherein the lower rib portion (15) and the upper rib portion (19) are integrally formed with the case (11). The projecting tip portion (15a) of the lower rib portion (15) is disposed via the air flow upstream surface (13e) and a gap (17),
The projecting tip end portion (19a) of the upper rib portion (19) is disposed via the surface (13g) on the downstream side of the air flow and a gap (21),
A gap (17) between the protruding tip (15a) of the lower rib (15) and the surface (13e) on the upstream side of the air flow, and a protruding tip (19a) of the upper rib (19) The air conditioner according to claim 1 or 2, wherein a gap (21) between each of the air flow downstream surface (13g) and the surface (13g) is set within 3 mm.

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