JP5827542B2 - Air conditioner for vehicles - Google Patents

Description

  The present invention belongs to the technical field of a structure for suppressing condensed water adhering to a cooling heat exchanger from leaking to the outside of a casing.

  Conventionally, a vehicle air conditioner accommodates a cooling heat exchanger and a heating heat exchanger in a casing, adjusts the temperature of air conditioning air using these heat exchangers, and then supplies the air conditioning air to each part of the passenger compartment. It is configured. Generally, since it is difficult to integrally mold the casing of the vehicle air conditioner, the casing is divided into a plurality of casing constituent members as disclosed in Patent Document 1.

  In Patent Document 1, the casing is divided into a front casing constituent member that houses a cooling heat exchanger and a rear casing constituent member that houses a heating heat exchanger and the like, and is cooled in the front casing constituent member. The air thus formed is introduced into the rear casing component.

JP 2011-195091 A

  However, when air conditioning air is allowed to flow from the front casing constituent member to the rear casing constituent member as in Patent Document 1, a cooling heat exchanger is accommodated in the front casing constituent member. In some cases, the condensed water adhering to the surface of the heat exchanger rides on the air flow and scatters toward the rear casing component. This is particularly noticeable when the amount of blast is increased when the amount of condensed water attached is large.

  Spattered condensed water may adhere to the mating part of the front casing component and the rear casing component, and if this happens, it will leak out from between the two casing components and as a result, the vehicle interior may get wet. There is.

  On the other hand, by dividing the casing in the vertical direction so that the dividing surface of the casing is horizontal and positioned above the bottom wall portion, the dividing surface can be prevented from passing through the bottom wall portion of the casing. Although it is conceivable, depending on the structure of the air conditioner, it is not always possible to divide as such, and there is a case where the division surface has to be divided so as to pass through the bottom wall portion.

  The present invention has been made in view of such points, and the object of the present invention is to condense water of a heat exchanger for cooling when the casing is divided so that the dividing surface passes through the bottom wall portion of the casing. Even if it adheres to the mating part of a casing structural member, it exists in suppressing the leak to the exterior.

  In order to achieve the above object, according to the present invention, the casing is provided with an outer peripheral seal portion and an inner peripheral seal portion, which are arranged apart in the inner and outer directions.

1st invention is equipped with the heat exchanger for cooling, the said heat exchanger for cooling, and the casing divided | segmented into the some casing structural member, The air-conditioning air introduce | transduced into the said casing is cooled by the said cooling In the vehicle air conditioner configured to pass through the heat exchanger for cooling and cool and then supply the temperature adjusted to each part of the passenger compartment, the casing has a divided surface passing through the bottom wall of the casing. An upstream casing constituent member and a downstream casing constituent member located upstream and downstream in the air flow direction, wherein the upstream casing constituent member houses the cooling heat exchanger, and the upstream casing constituent member The bottom portion is provided with an opposing wall portion extending in the vertical direction so as to face the lower portion of the cooling heat exchanger at the mating portion with the downstream casing constituent member. A wall portion extending vertically in a state where a gap is formed between the facing wall portion and the facing wall portion at the mating portion with the upstream casing constituting member at the bottom portion of the single member. An outer peripheral side seal portion is provided on the outer peripheral side by concave-convex fitting on the opposing wall portion of the upstream casing constituent member and the wall portion of the downstream casing constituent member. Also, an inner peripheral side seal portion is provided at a portion distant from the inner peripheral side by concave-convex fitting.

  According to this configuration, since the concave and convex fitting structures are provided on the inner peripheral side and the outer peripheral side of the mating portion of the casing constituent member, the rigidity of the mating portion is increased, and the concave and convex portions are firmly fitted and sealed. Can be increased.

  Therefore, during operation of the air conditioner, when the condensed water adhering to the cooling heat exchanger scatters from the upstream casing component to the downstream casing component and adheres to the mating portion, the inner peripheral seal portion causes the casing to Leakage to the outside is suppressed.

  If there is water leakage from the inner peripheral side seal part, the inner peripheral side seal part and the outer peripheral side seal part are separated, so the condensed water leaking from the inner peripheral side seal part is the inner peripheral side seal part and the outer peripheral side seal. Therefore, the amount of condensed water reaching the outer peripheral side seal portion is extremely reduced. Condensed water that has reached the outer peripheral seal portion is prevented from leaking to the outside of the casing by the outer peripheral seal portion.

  In a second aspect based on the first aspect, a water retention part is provided between the outer peripheral side seal part and the inner peripheral side seal part for retaining condensed water leaking from the inner peripheral side seal part. It is characterized by being.

  According to this configuration, if condensed water leaks from the inner circumferential side seal portion, the condensed water is temporarily retained by the water retention portion, so that it is difficult to reach the outer circumferential side seal portion. The retained condensed water can be eliminated from the water retaining section, for example, gradually evaporates spontaneously while the operation of the air conditioner is stopped.

  According to a third aspect, in the second aspect, the water retention part is a rib formed on one of the upstream casing constituent member and the downstream casing constituent member.

  According to this configuration, it is possible to increase the rigidity of the upstream casing constituent member or the downstream casing constituent member using the water retaining portion.

  According to the first invention, when the casing is divided into the upstream casing constituent member and the downstream casing constituent member by the dividing surface passing through the bottom wall portion of the casing, the outer peripheral side seal portion and the inner peripheral side by the concave-convex fitting Since the seal portion is provided apart from each other, leakage to the outside can be suppressed even if the condensed water of the cooling heat exchanger adheres to the mating portion of the casing constituent member.

  According to the second invention, since the water retention part is provided between the outer peripheral side seal part and the inner peripheral side seal part, the condensed water is more difficult to leak.

  According to the third aspect, since the rib formed on one of the upstream casing constituent member and the downstream casing constituent member is used as the water retaining portion, the rigidity of the casing constituent member can be increased using the water retaining portion. Thereby, the sealing performance of an outer peripheral side seal part and an inner peripheral side seal part can be improved further.

1 is a perspective view of a vehicle air conditioner according to Embodiment 1. FIG. It is a right view of a vehicle air conditioner. It is a top view of a vehicle air conditioner. It is sectional drawing of the vehicle air conditioner. It is a disassembled perspective view of a casing. It is a rear view of an upper casing structural member. It is a right view of an upper casing structural member. It is a perspective view of a lower casing structural member. It is a rear view of a lower casing structural member. It is an enlarged view of a seal part. FIG. 11 is a diagram corresponding to FIG. 10 according to Modification 1; FIG. 11 is a diagram corresponding to FIG. 10 according to Modification 2. FIG. 10 is a diagram corresponding to FIG. 10 according to Modification 3. FIG. 10 is a diagram corresponding to FIG. 10 according to Modification 4. FIG. 10 is a diagram corresponding to FIG. 10 according to Modification 5. FIG. 9 is a view corresponding to FIG. 8 according to Modification 6. FIG. 9 is a view corresponding to FIG. 8 according to Modification 7. FIG. 9 is a diagram corresponding to FIG. 8 according to Modification 8.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature, and is not intended to limit the present invention, its application, or its use.

  FIGS. 1-3 shows the air conditioning unit 20 of the vehicle air conditioner 1 concerning Embodiment 1 of this invention. The vehicle air conditioner 1 is mounted in an instrument panel (not shown) disposed at the front end of a vehicle cabin.

  The vehicle air conditioner 1 includes a blower unit (not shown) and an air conditioning unit 20. The blower unit is disposed on the passenger seat side of the vehicle, and the air conditioning unit 20 is disposed in the center in the vehicle width direction. The blower unit and the air conditioning unit 20 are connected.

  In the description of this embodiment, the front side of the vehicle is simply referred to as “front”, the rear side of the vehicle is simply referred to as “rear”, the right side of the vehicle is simply referred to as “right”, and the left side of the vehicle is simply referred to as “left”. To do.

  The blower unit includes a blower and includes an inside / outside air switching unit. The inside / outside air switching unit is for selecting and introducing one of the air inside the passenger compartment and the air outside the passenger compartment, and the blower unit sends the air inside the passenger compartment or the air outside the passenger compartment to the air conditioning unit 20. Can be done.

  As shown in FIG. 4, the air conditioning unit 20 includes an evaporator 21 as a heat exchanger for cooling, a heater core 22 as a heat exchanger for heating, an air mix damper 23, a defroster damper 24, a vent damper 25, and a heat damper. 26 and a resin casing 27 for housing them.

  As shown in FIGS. 1 and 2, the casing 27 includes a front casing constituent member 27 a and a rear casing constituent member 27 b that are divided at an intermediate portion in the front-rear direction. The divided surfaces of the front casing component member 27a and the rear casing component member 27b are virtual surfaces that pass through the bottom wall portion of the casing 27 and extend substantially vertically and in the left-right direction. The air conditioning air blown from the blower unit is first introduced into the front casing constituent member 27a and then into the rear casing constituent member 27b. Therefore, the front casing constituent member 27a is It is an upstream casing component of the present invention, and the rear casing component 27b is a downstream casing component of the present invention.

  As shown in FIG. 5, the evaporator 21 is accommodated in the front casing component member 27 a, while the heater core 22, the air mix damper 23, and the rear casing component member 27 b, as shown in FIG. 4, A defroster damper 24, a vent damper 25, and a heat damper 26 are accommodated. The front casing component member 27a and the rear casing component member 27b are coupled using, for example, fasteners or screws.

  Furthermore, as shown in FIG. 1, the rear casing component member 27 b includes a left casing component member 27 c and a right casing component member 27 d that are divided at an intermediate portion in the left-right direction. The left casing component member 27c and the right casing component member 27d are coupled using fasteners, screws, or the like. The divided surfaces of the left casing component member 27c and the right casing component member 27d are virtual surfaces that pass through the bottom wall portion of the casing 27 and extend substantially vertically and in the front-rear direction.

  As shown in FIG. 5, the front casing component member 27a includes an upper casing component member 27e and a lower casing component member 27f that are divided at an intermediate portion in the vertical direction. The upper casing component member 27e and the lower casing component member 27f are also coupled using fasteners, screws, or the like.

  Note that the front casing component 27a is not divided in the left-right direction, and there is no dividing surface on the bottom wall portion of the front casing component 27a. This is to prevent the condensed water described later from leaking from the bottom wall.

  As shown in FIG. 4, an air passage R through which air-conditioning air flows is formed in the casing 27. The evaporator 21 is accommodated in the air passage R inside the front casing component member 27a.

  The structure of the evaporator 21 will be described. The evaporator 21 is a tube-and-fin type heat exchanger having a large number of tubes and fins (both not shown), and constitutes an evaporator that is an element of the refrigeration cycle. ing.

  The evaporator 21 has a substantially rectangular parallelepiped shape as a whole. The tubes and fins of the evaporator 21 extend in the vertical direction and are arranged alternately in the horizontal direction. Therefore, as shown in FIG. 4, the evaporator 21 has a cooling passage R <b> 1 constituting a part of the air passage R. Crossing. The tubes are arranged in two rows in the air passage direction (front-rear direction) of the evaporator 21. The core 21a is constituted by the tube and the fin.

  As shown also in FIG. 5, upper and lower header tanks 21b and 21c are provided at the upper and lower portions of the evaporator 21, respectively, and upper and lower end portions of the tubes are respectively provided on the upper and lower header tanks 21b and 21c. It is connected. A partition plate (not shown) is disposed inside the upper and lower header tanks 21b and 21c, and a plurality of paths are formed in the evaporator 21 by the partition plate.

  As shown in FIG. 5, on the right side surface of the upper header tank 21 b of the evaporator 21, a supply-side cooler pipe 47 for supplying a refrigerant as a heat exchange medium and the refrigerant after circulating in the evaporator 21 are discharged. Therefore, a refrigerant as a heat exchange medium circulates inside the evaporator 21. The supply side cooler pipe 47 and the discharge side cooler pipe 48 protrude from the right side surface of the evaporator 21.

  The air conditioning air flowing in the cooling passage R1 passes through the evaporator 21, whereby the refrigerant and the air conditioning air exchange heat, and the air conditioning air is cooled. At this time, condensed water is generated on the surface of the evaporator 21. This condensed water mainly flows down through the tubes and fins, but may be scattered downstream (details will be described later).

  In the state where the evaporator 21 is housed in the front casing component member 27a, the air inflow surface of the core 21a is directed forward, the air outflow surface is directed rearward, and the air inflow surface and the air outflow surface are substantially in the vertical direction. It becomes the posture which extends to. Further, the right side surface and the left side surface of the evaporator 21 extend in the up-down direction, and the upper surface and the lower surface extend in the left-right direction.

  Next, the structure of the front casing component member 27a will be described. As shown in FIG. 1, an introduction duct 30 extending toward the blower unit side (right side) is integrally formed on the right side wall portion of the front casing component member 27a. The introduction duct 30 is divided into two in the vertical direction by the dividing surface of the front casing component 27a, the upper duct component 30a is integrally formed with the upper casing component 27e, and the lower duct component 30b is configured as the lower casing. It is integrally formed with the member 27f. The passage in the introduction duct 30 is constituted by an upstream portion of the air passage R.

  A bracket 46 for supporting the heater pipes 44 and 45 and the cooler pipes 47 and 48 is provided on the front casing constituent member 27a. The upper bracket component 46a is integrally formed with the upper casing component 27e, and the lower bracket component 46b is integrally formed with the lower casing component 27f.

  As shown in FIG. 5, the lower casing component member 27f is formed to open upward as a whole. As shown in FIGS. 8 and 9, a cutout portion 50 is formed in the rear wall portion of the lower casing component member 27f to allow air-conditioning air to flow to the rear casing component member 27b. The notch 50 has a substantially U-shape that opens upward, and the lower edge of the notch 50 is located above the bottom wall of the front casing component 27a.

  A lower side of the rear wall portion of the lower casing component member 27f than the notch portion 50 is an opposing wall portion 50a that extends substantially in the vertical direction and faces the core 21a of the evaporator 21. As shown in FIG. 10, an inner peripheral ridge 61 constituting an inner peripheral seal portion 67 is provided on the upper edge portion of the facing wall portion 50 a. As shown in FIG. 9, the inner circumferential protrusion 61 projects rearward and extends linearly in the left-right direction along the lower edge of the notch 50. Further, the inner circumferential ridge portion 61 is thinner as it approaches the distal end in the protruding direction.

  On the lower side of the facing wall portion 50a, an outer peripheral side concave ridge portion 62 constituting the outer peripheral side seal portion 68 is provided at a position away from the inner peripheral side convex ridge portion 61 to the lower side (the outer peripheral side of the casing 27). ing. As shown in FIG. 10, the part that forms the outer circumferential recess 62 protrudes rearward from the facing wall 50 a, and the outer circumferential recess 62 is formed in this protruding part so as to be recessed forward. Yes. As shown in FIG. 9, the outer peripheral recess 62 extends as a whole so as to draw a U-shape that opens upward along the edge of the notch 50. The lower side of the outer circumferential recess 62 extends in the left-right direction substantially parallel to the inner circumferential projection 61.

  As shown in FIGS. 8 and 9, a large number of water retaining portions 63, 63,... Are provided between the inner peripheral ridge 61 and the outer peripheral ridge 62 of the opposing wall 50 a. . The water retaining portion 63 is for temporarily retaining water when the condensed water splashed from the evaporator 21 flows toward the lower side of the opposing wall portion 50a beyond the inner peripheral convex portion 61. These are arranged so as to be arranged on both the left and right sides of the opposing wall portion 50a and also on the upper and lower sides.

  Each water retaining portion 63 protrudes rearward from the opposing wall portion 50a as shown in FIG. 10, and has a substantially U shape that opens upward when viewed from the rear side as shown in FIG. When the condensed water reaches the water retention part 63, the condensed water gathers around the water retention part 63 due to surface tension and is retained.

  Moreover, the water retention parts 63 arranged in the left-right direction are arranged with a space therebetween, thereby ensuring a wide water retention area. Further, the water retention parts 63 arranged in the vertical direction are connected to each other, and the condensed water flows from the uppermost water retention part 63 to the lowermost water retention part 63. Thereby, it becomes possible to retain water by effectively utilizing the lowermost water retention part 63. Moreover, the rib which continues in an up-down direction is formed in the opposing wall part 50a by the water retention part 63 arranged in an up-down direction.

  As shown in FIG. 8, the right side wall portion 51 of the lower casing component member 27 f extends along the right side surface of the evaporator 21 substantially straight in the vertical direction. The left side wall portion 52 of the lower casing component member 27f also extends along the left side surface of the evaporator 21 substantially straight in the vertical direction.

  Further, the bottom wall portion 53 of the lower casing component member 27f basically extends along the lower surface of the evaporator 21, and a part of the bottom wall portion 53 collects condensed water that has condensed and dropped on the evaporator 21. A condensate drainage 49 for discharging is provided. The condensed water drainage part 49 is configured by inclining the bottom wall part 53 so that the vicinity of the central part in the left-right direction is the lowest. As shown in FIG. 9, the condensate drainage 49 is provided with a drain portion D for discharging the condensate to the outside of the front casing constituent member 27a.

  A drain hose H is connected to the drain part D. Although not shown, the lower end of the drain hose H is connected to a through-hole formed in the vehicle body panel and communicates with the outside of the passenger compartment.

  The upper casing constituent member 27e is formed so as to open downward as a whole. As shown in FIGS. 5 and 6, the rear wall portion of the upper casing component member 27e has a cutout portion 56 for circulating the air-conditioning air to the rear casing component member 27b. It is formed so as to coincide with the portion 50.

  The left side wall portion 57, the upper wall portion 58, and the right side wall portion 60 of the upper casing component member 27e are portions that surround the outer peripheral surface of the evaporator 21. The left side wall 57 extends substantially straight in the vertical direction along the left side surface of the evaporator 21.

  The lower end of the left side wall portion 57 and the upper end of the left side wall portion 52 of the lower casing constituent member 27f are continuous when the casing constituent members 27e and 27f are combined.

  Further, the upper wall portion 58 of the upper casing component member 27e extends along the upper surface of the evaporator 21 substantially horizontally in the left-right direction.

  The right side wall portion 60 of the upper casing component member 27e includes a side wall bulging portion 60a that bulges away from the outer peripheral surface (right side surface) of the evaporator 21 to the outside (right side) of the front casing component member 27a. The side wall bulging portion 60 a forms a gap between the right side wall portion 60 of the upper casing component member 27 e and the right side surface of the evaporator 21.

  As shown in FIG. 5, a duct bulging portion 30c formed so as to bulge upward is formed in the upper duct constituting portion 30a of the upper casing constituting member 27e. The inside of the duct bulging portion 30c communicates with the inside of the side wall bulging portion 60a.

  Further, the inside of the upper bracket constituting portion 46a is hollow and communicates with the inside of the duct bulging portion 30c.

  The supply side cooler pipe 47 and the discharge side cooler pipe 48 reach the bracket 46 through the inside of the duct bulging portion 30c and the upper bracket constituting portion 46a.

  As shown in FIGS. 2 and 3, an expansion valve block C containing a known expansion valve is attached to the leading end side of the supply side cooler pipe 47 and the discharge side cooler pipe 48.

  The front ends of the cooler pipes 47 and 48 protrude from the through hole of the dash panel of the vehicle to the engine room. Pipes in the engine room are connected to the front ends of the cooler pipes 47 and 48 via an expansion valve block C.

  Next, the structure of the rear casing component member 27b will be described. As shown in FIG.1 and FIG.3, the defroster blower outlet 32 is formed in the center part of the front-back direction of the upper wall part of the rear casing structural member 27b. The defroster outlet 32 is connected to a defroster duct (not shown) extending to the defroster nozzle of the instrument panel.

  A vent outlet 34 is formed on the rear side of the upper wall portion of the rear casing component member 27b. Although not shown, a vent duct extending to the vent nozzle of the instrument panel is connected to the vent outlet 34.

  As shown in FIG. 2, a heat outlet 36 is formed on the rear side of the rear casing component member 27b. Although not shown, a foot duct extending to the passenger's feet is connected to the heat outlet 36.

  As shown in FIG. 4, the downstream portion of the cooling passage R1 of the air passage R branches up and down in the rear casing component member 27b, and the partition wall 38 disposed in the rear casing component member 27b. The upper opening 40 formed on the upper side communicates with the lower opening 41 formed on the lower side of the partition wall 38.

  A heating passage R <b> 2 that heats air for air conditioning is connected to the lower opening 41. An air mix space R <b> 3 is connected to the upper opening 40. The downstream side of the heating passage R2 is connected to the air mix space R3.

  The air mix damper 23 is configured to open and close the upper opening 40 and the lower opening 41 and also to open and close the downstream end opening 43 of the heating passage R2. The air mix damper 23 is opened with the upper opening 40 fully opened. The side opening 41 and the downstream end opening 43 of the heating passage R2 are fully closed, while the upper opening 40 and the downstream end opening 43 of the heating passage R2 are fully opened while the lower opening 41 is fully opened.

  In addition, the opening degree of each opening part 40,41,43 by the air mix damper 23 can be set arbitrarily.

  The defroster damper 24 opens and closes the defroster outlet 32, the vent damper 25 opens and closes the vent outlet 34, and the heat damper 26 opens and closes the heat outlet 36.

  The heater core 22 is disposed in the heating passage R2. As shown in FIG. 1, the heater core 22 has a supply side heater pipe 44 for supplying engine cooling water as a heat exchange medium, and a discharge side heater for discharging engine cooling water after circulating through the heater core 22. A pipe 45 is connected, and the engine coolant is circulated inside the heater core 22. The air for air conditioning is heated by heat exchange between the engine cooling water and the air for air conditioning flowing in the heating passage R2.

  The heater pipes 44 and 45 penetrate the right side wall portion of the rear casing constituent member 27b and extend outward of the casing 27 toward the front side. The front end side (front end side) of the heater pipes 44 and 45 is held by a bracket 46 provided on the front casing constituting member 27a. The front ends of the heater pipes 44 and 45 protrude from a through hole formed in a dash panel (not shown) of the vehicle to the engine room. Pipes in the engine room are connected to the front ends of the heater pipes 44 and 45.

  As shown in FIG. 4, the partition wall 38 of the rear casing component member 27b extends substantially in the vertical direction in a state of facing the opposing wall portion 50a of the front casing component member 27a. The upper end of the partition wall 38 is located above the upper end of the opposing wall portion 50a. The partition wall 38 and the facing wall portion 50a are separated in the front-rear direction, and a water retention space capable of retaining condensed water is formed inside.

  The opposing wall portion 50a of the front casing component member 27a and the partition wall 38 of the rear casing component member 27b are located between the lower portion of the heater core 22 and the lower portion of the evaporator 21, so that a double wall with high heat insulation is formed. Will form. Thereby, it becomes difficult for the heat of the heater core 22 to be transmitted to the evaporator 21, and the cooling performance is improved.

  As shown in FIG. 10, the partition wall 38 of the rear casing component member 27 b is provided with an inner peripheral recess 65 that constitutes an inner peripheral seal portion 67 together with the inner peripheral protrusion 61. The part which forms the inner peripheral side groove part 65 protrudes from the partition wall 38 to the front side, and the inner peripheral side groove part 65 is formed in this protruding part so as to be recessed rearward.

  An outer peripheral ridge 66 that constitutes the outer peripheral seal portion 68 together with the outer peripheral recess 62 is formed in a portion of the partition wall 38 that is spaced below the inner peripheral recess 65. The outer peripheral ridge 66 protrudes forward and extends in a U-shape like the outer peripheral ridge 62. The outer peripheral ridge 66 is thinner as it approaches the distal end in the protruding direction.

  When the front casing constituent member 27a and the rear casing constituent member 27b are combined, the inner peripheral convex portion 61 enters the inner peripheral concave portion 65, so that they are unevenly fitted, and the outer peripheral concave portion is also provided. When the outer peripheral ridge 66 enters into 62, both are concavo-convexly fitted. As a result, a double seal structure is obtained that is arranged away from the inside and outside of the casing 27.

  The rigidity of the opposing wall portion 50a is increased by forming the inner circumferential convex portion 61 and the outer circumferential concave portion 62 on the opposing wall portion 50a. In addition, the partition wall 38 is also formed with the inner circumferential recess 65 and the outer projection 66 so that the rigidity of the partition 38 is increased. Therefore, deformation of the opposing wall portion 50a and the partition wall 38 is suppressed, and occurrence of abnormal noise such as chatter noise is also suppressed.

  Since it is made to combine things which are hard to deform | transform in this way, fitting with the inner peripheral side concave strip part 65 and the inner peripheral side convex strip part 61, and the outer peripheral side concave strip part 62 and the outer peripheral side convex strip part 66. And the assembly workability and the sealing performance are improved. In this fitting state, each of the inner peripheral side seal portion 67 and the outer peripheral side seal portion 68 is designed to ensure water tightness. Therefore, in this embodiment, another portion made of rubber or the like is provided between the inner circumferential recess 65 and the inner projection 61 and between the outer recess 62 and the outer projection 66. No body seal material is provided. Thereby, the number of parts of the vehicle air conditioner 1 is reduced, the number of manufacturing steps is reduced, and thus the cost can be reduced.

  Next, the operation of the vehicle air conditioner 1 configured as described above will be described. The air-conditioning air blown from the blower unit flows through the introduction duct 30 and flows into the cooling passage R1 of the air-conditioning unit 20 and passes through the evaporator 21 and is cooled. At this time, condensed water is generated on the surface of the evaporator 21. Condensed water on the surface of the evaporator 21 is collected by dripping into the condensed water drainage portion 49 of the casing 27 mainly through the tubes and fins, and drained outside the vehicle compartment through the drain portion D and the drain hose H.

  However, a large amount of condensed water may adhere to the evaporator 21 depending on the humidity or temperature state of the air-conditioning air. In this case, for example, if the amount of air blown by the blower unit is suddenly increased, it adheres to the evaporator 21. The condensate that is flowing may ride on the air-conditioning air flow and scatter to the downstream side (rear casing component member 27b side).

  The condensed water scattered may adhere to the inner circumferential side seal portion 67. In this case, the inner peripheral side seal portion 67 is originally designed to ensure water tightness, but the condensed water is not sealed in the inner peripheral side seal portion 67 due to secular changes, manufacturing errors, the amount of attached condensed water, and the like. It is conceivable that the gas leaks downward through the space between the inner circumferential ridge portion 61 and the inner circumferential ridge portion 65.

  If there is water leakage from the inner peripheral side seal portion 67, the inner peripheral side seal portion 67 and the outer peripheral side seal portion 68 are separated from each other, so the condensed water leaked from the inner peripheral side seal portion 67 is the inner peripheral side seal portion. Between 67 and the outer peripheral side seal part 68, it adheres to the opposing wall part 50a and the partition 38, and water is temporarily retained.

  In particular, in the present embodiment, the water retaining portions 63, 63,... Are provided in the opposing wall portion 50 a, so the condensed water flowing downward through the opposing wall portion 50 a is retained in each water retaining portion 63. At this time, since each water retention part 63 is U-shaped to open upward, it is possible to reliably receive and retain the condensed water flowing from above. Thereby, the amount of condensed water reaching the outer peripheral side seal portion 68 is extremely reduced, or the condensed water does not reach the outer peripheral side seal portion 68. Since the condensed water that has reached the outer peripheral side seal portion 68 is prevented from leaking to the outside of the casing 27 by the outer peripheral side seal portion 68, it can be prevented from leaking into the passenger compartment.

  Note that the condensed water retained in the water retention unit 63 does not spontaneously evaporate when the air conditioner 1 is stopped, for example.

  As described above, according to the vehicle air conditioner 1 according to this embodiment, the casing 27 is divided into the front casing constituent member 27a and the rear casing constituent member 27b by the dividing surface passing through the bottom wall portion of the casing 27. In this case, since the outer peripheral side seal portion 68 and the inner peripheral side seal portion 67 are provided apart from each other, the condensed water of the evaporator 21 is exposed to the outside even if it adheres to the mating portions of the casing constituent members 27a and 27b. Leakage can be suppressed.

  In this case, since the water retaining portions 63, 63,... Are provided between the outer peripheral side seal portion 68 and the inner peripheral side seal portion 67, the condensed water is more difficult to leak.

  Moreover, since the water retention part 63 functions as a rib of the opposing wall part 50a, this also improves the rigidity of the opposing wall part 50a.

  Moreover, in the said embodiment, the inner peripheral side seal part 67 is comprised by the inner peripheral side convex strip part 61 and the inner peripheral side concave strip part 65, and the outer peripheral side seal part 68 is comprised by the outer peripheral side concave strip part 62 and the outer peripheral side convex part. Although comprised with the strip part 66, it is not restricted to this, For example, the combination of an unevenness | corrugation can be arbitrarily set like the modifications 1-3 shown in FIGS. 11-13.

  In the first modification shown in FIG. 11, the inner circumferential side seal portion 67 is constituted by the inner circumferential side concave strip portion 70 of the opposing wall portion 50 a and the inner circumferential side convex strip portion 71 of the partition wall 38.

  In the modification 2 shown in FIG. 12, the outer peripheral side seal part 68 is comprised by the outer peripheral side convex strip part 72 of the opposing wall part 50a, and the outer peripheral side concave strip part 73 of the partition wall 38. As shown in FIG.

  In the third modification shown in FIG. 13, the inner peripheral seal portion 67 is configured by the inner peripheral concave portion 70 of the opposing wall portion 50 a and the inner peripheral convex portion 71 of the partition wall 38, and the outer peripheral seal portion 68 is formed. It is comprised by the outer peripheral side convex strip part 72 of the opposing wall part 50a, and the outer peripheral side concave strip part 73 of the partition wall 38. FIG.

  Further, as in Modification 4 shown in FIG. 14, the inner circumferential side convex strip portion 61 and the inner circumferential side concave strip portion 65 of the inner circumferential side seal portion 67 are connected to the outer peripheral side concave strip portion 62 of the outer peripheral side sealing portion 68. You may form larger than the outer peripheral side protruding item | line part 66. FIG. In this case, since the sealing performance by the inner peripheral side seal portion 67 is particularly enhanced, the leakage of condensed water to the water retention space is further reduced.

  Further, as in Modification 5 shown in FIG. 15, the outer peripheral side concave strip 62 and the outer peripheral convex strip 66 of the outer peripheral seal portion 68 are connected to the inner peripheral convex portion 61 of the inner peripheral seal portion 67 and the inner side. You may form larger than the circumferential groove 65 part. In this case, since the sealing performance by the outer peripheral side seal portion 68 is particularly enhanced, the leakage to the vehicle compartment can be suppressed when the condensed water retained in the water retention portion 63 flows downward.

  In addition, the shape of the water retaining portion 63 is not limited to the above-described shape, and the water retaining portion 63 may be configured with a rib extending in the vertical direction as in Modification 6 shown in FIG. The water retaining portion 63 extends while being bent to the left and right, and a sufficient amount of condensed water is retained by the bent portion. Moreover, since the rib is the water retaining portion 63, the rigidity of the front casing component member 27a can be increased using the water retaining portion 63. Thereby, a sealing performance can be further improved. In the modified example 6, the water retaining part 63 may extend obliquely, or may extend substantially horizontally in the left-right direction.

  Further, as in Modification 7 shown in FIG. 17, short ribs may be used as the water retaining portions 63a and 63b. The water retention part 63a extends toward the upper right and the water retention part 63b extends toward the upper left. By arranging these water retaining portions 63a and 63b alternately in the vertical direction, the condensed water flowing from above can be reliably retained. The length of the water retaining parts 63a and 63b can be set arbitrarily.

  Further, as in Modification 8 shown in FIG. 18, the water retention part 63 may be configured by a protrusion. In this modified example 8, the water retention parts 63 are arranged so as to be diagonally arranged from the lower left to the upper right of the opposing wall part 55a. As a result, the condensed water flowing from above reaches one of the water retaining portions 63, so that the condensed water can be reliably retained. The shape of the water retaining part 63 may be a polygonal protrusion or an elliptical protrusion in addition to the circular protrusion, or a combination thereof.

  Moreover, you may combine arbitrarily the water retention part 63 concerning the said embodiment, and the water retention parts 63, 63a, and 63b concerning the modifications 6-9.

  Further, the water retaining portions 63, 63a, 63b may be provided in the partition wall 38 of the rear casing component member 27b, or may be provided in both the partition wall 38 and the opposing wall portion 50a.

  Further, the water retaining part 63 may be configured by attaching another member having water retaining capacity to the partition wall 38 or the opposing wall part 50a.

  The front casing component member 27a may be an integrally molded product.

  Moreover, as the vehicle air conditioner 1, in addition to the semi-center type in which the air conditioning unit 20 and the air blowing unit as described above are arranged side by side in the left-right direction, the heat exchanger and the air blower are provided at the center in the vehicle width direction. The present invention can be applied to any of the arranged full center types.

  As described above, the vehicle air conditioner according to the present invention can be applied to a vehicle including a casing divided into a plurality of casing constituent members.

DESCRIPTION OF SYMBOLS 1 Vehicle air conditioner 20 Air conditioning unit 21 Evaporator (cooling heat exchanger)
22 heater core 27 casing 27a front casing component (upstream casing component)
27b Rear casing component (downstream casing component)
47 Supply side cooler pipe 48 Discharge side cooler pipe 67 Inner peripheral side seal part 68 Outer peripheral side seal part 63 Water retention part R Air passage

Claims (3)

A heat exchanger for cooling;
A housing divided into a plurality of casing constituent members while containing the cooling heat exchanger,
In the vehicle air conditioner configured to supply the air conditioning air introduced into the casing to each part of the passenger compartment by adjusting the temperature after passing through the cooling heat exchanger and cooling,
The casing includes an upstream casing constituent member and a downstream casing constituent member whose split surfaces pass through the bottom wall portion of the casing and are located upstream and downstream in the air flow direction,
The cooling heat exchanger is accommodated in the upstream casing component,
At the bottom of the upstream casing component member, a mating portion with the downstream casing component member is provided with an opposing wall portion extending in the vertical direction so as to face the lower portion of the cooling heat exchanger,
At the bottom of the downstream casing component member, in the vertical direction with the mating portion with the upstream casing component member facing the opposing wall portion and forming a gap between the opposing wall portion An extending wall is provided,
The opposing wall portion of the upstream casing constituent member and the wall portion of the downstream casing constituent member are provided with an outer peripheral side seal portion by concave and convex fitting on the outer peripheral side, the inner peripheral side from the outer peripheral side seal portion An air conditioner for vehicles is provided with an inner peripheral side seal portion by concave-convex fitting at a part far away from each other. In the vehicle air conditioner according to claim 1,
A vehicle air conditioner is provided between the outer peripheral seal portion and the inner peripheral seal portion, wherein a water retention portion for retaining condensed water leaking from the inner peripheral seal portion is provided. . In the vehicle air conditioner according to claim 2,
The vehicle air conditioner, wherein the water retaining portion is a rib formed on one of the upstream casing constituent member and the downstream casing constituent member.

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