JP2018203063A - Vehicular air-conditioning device - Google Patents

Abstract

To provide a vehicular air-conditioning device that can improve the heat exchange efficiency in a cooling heat exchanger by uniformly passing the air flowing through an air flow passage over the entire surface of the cooling heat exchanger.SOLUTION: On the surface of a first air flow passage 216, to which the end surface of an evaporator 15 facing the upstream side in the air flow direction is opposed, there is provided a flow direction changing portion 216a that extends in the up and down direction and protrudes toward the evaporator 15 side to change the flow direction of the air flowing through the first air flow passage 216. The flow direction changing portion 216a is formed such that the protruding size to the evaporator 15 side on the lower side of the first air flow passage 216 is larger than that on the upper side.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a vehicle air conditioner in which, for example, a blower unit and an air conditioning unit are arranged in the vehicle width direction.

  Conventionally, this type of vehicle air conditioner includes an air conditioning case in which an air flow passage is formed, and a cooling heat exchanger that is disposed in the air flow passage and cools air flowing through the air flow passage. The air flow passage has an upstream flow passage located on the upstream side in the air flow direction of the cooling heat exchanger, and a downstream flow passage located on the downstream side in the air flow direction of the cooling heat exchanger, The upstream-side flow passage is formed so as to extend in the horizontal direction from the cooling heat exchanger toward the upstream side in the air flow direction in parallel with the end face facing the upstream side in the air flow direction of the cooling heat exchanger. The passage has a width dimension substantially the same as the width dimension of the cooling heat exchanger, and is formed to extend while maintaining the width dimension from the upper side of the space into which the air that has passed through the cooling heat exchanger flows, End facing the upstream side of the air flow direction of the cooling heat exchanger in the upstream flow passage And a surface that is provided with a flow direction changing portion that extends in the vertical direction and protrudes toward the cooling heat exchanger and changes the flow direction of the air flowing through the upstream flow passage. (For example, refer to Patent Document 1).

Japanese Patent No. 4715857

  In the vehicle air conditioner, the flow direction changing portion changes the flow direction of a part of the air flowing through the upstream flow passage, and from the entire longitudinal direction of the air discharge port extending parallel to the end face of the cooling heat exchanger. Air is uniformly discharged.

  In the vehicle air conditioner, the downstream-side flow passage extends upward or sideward from the upper side of the space into which the air that has passed through the cooling heat exchanger flows. For this reason, in the upstream flow passage of the vehicle air conditioner, in the space of the upstream flow passage that faces the upstream side in the air flow direction of the cooling heat exchanger, the air flow is biased toward the upper side and the heat exchange for cooling Will pass through the vessel. Therefore, in the vehicle air conditioner, the air flowing through the air flow passage cannot be uniformly passed over the entire surface of the cooling heat exchanger, and the heat exchange efficiency in the cooling heat exchanger is reduced.

  An object of the present invention is to provide a vehicle capable of improving the heat exchange efficiency in the cooling heat exchanger by allowing the air flowing through the air flow passage to uniformly pass through the entire surface of the cooling heat exchanger. It is to provide an air conditioning apparatus for use.

  In order to achieve the above object, the present invention includes an air conditioning case in which an air flow passage is formed, and a cooling heat exchanger that is disposed in the air flow passage and cools the air that flows through the air flow passage. The air flow passage has an upstream flow passage located upstream of the cooling heat exchanger in the air flow direction, and a downstream flow passage located downstream of the cooling heat exchanger in the air flow direction. The side flow passage is formed so as to extend in the horizontal direction parallel to the end face of the cooling heat exchanger facing the upstream side in the air flow direction from the cooling heat exchanger toward the upstream side in the air flow direction. Has a first downstream flow passage into which air that has passed through the cooling heat exchanger flows, and a second downstream flow passage that communicates with the space on the upper side of the first downstream flow passage. On the surface facing the end face facing the upstream side of the air flow direction of the cooling heat exchanger in the flow path A flow direction changing portion is provided that extends in the vertical direction and protrudes toward the cooling heat exchanger side and changes the flow direction of the air flowing through the upstream flow passage. The flow direction changing portion is provided on the cooling heat exchanger side. The projecting dimension is larger on the lower side than on the upper side of the upstream flow passage.

  As a result, a part of the air flowing under the upstream flow passage is circulated toward the portion located on the upstream side in the air flow direction on the lower side of the cooling heat exchanger, and the cooling heat Air flowing through the upstream side flow passage uniformly passes over the entire surface of the exchanger.

  According to the present invention, the air flowing through the upstream side flow passage can be uniformly passed over the entire surface of the cooling heat exchanger, so that the efficiency of heat exchange between the air and the refrigerant in the cooling heat exchanger is improved. It becomes possible to make it.

1 is a schematic configuration diagram of a vehicle air conditioner showing an embodiment of the present invention. It is a perspective view of an air-conditioning unit. It is a front view of a ventilation unit and an air-conditioning unit. It is AA sectional drawing of FIG. It is a figure which shows the distribution direction change part and subflow direction change part in the upper side of a 1st airflow path. It is a figure which shows the distribution direction change part and subflow direction change part in the lower side of a 1st airflow path. It is side surface sectional drawing of the air conditioning unit which shows other embodiment of this invention.

  1 to 6 show an embodiment of the present invention. In addition, the description showing the front-back direction, the left-right direction (width direction), and an up-down direction in this embodiment respond | corresponds to the front-back direction, the left-right direction (width direction), and the up-down direction of the vehicle provided with the air conditioner for vehicles of this invention. It shall be.

  The vehicle air conditioner 10 of the present invention is for cooling operation for lowering the temperature in the passenger compartment C, heating operation for increasing the temperature in the passenger compartment C, and reducing the humidity in the passenger compartment C. A dehumidifying operation is performed.

  As shown in FIG. 1, the vehicle air conditioner 10 includes a refrigerant circuit 11 that is used to cool and dehumidify the air supplied into the passenger compartment C.

  The refrigerant circuit 11 includes a compressor 12 for compressing and discharging the sucked refrigerant, a capacitor 13 for condensing the refrigerant discharged from the compressor 12, and a pressure for depressurizing the refrigerant condensed in the capacitor 13. The expansion valve 14 and an evaporator 15 as a cooling heat exchanger for evaporating the refrigerant decompressed in the expansion valve 14 are connected by a metal pipe such as copper or aluminum.

  Moreover, the vehicle air conditioner 10 is provided with the heater core 16 as a heating apparatus for heating the air supplied in the compartment C, as shown in FIG. The heater core 16 is connected to an engine cooling circuit 17 for cooling the engine E. The heater core 16 heats the air supplied into the passenger compartment C by exchanging heat between the engine cooling water that has absorbed the heat discharged from the engine E and the air supplied into the passenger compartment C.

  As shown in FIG. 1, the vehicle air conditioner 10 includes a blower unit 100 for inhaling and discharging one or both of air outside the passenger compartment C and air inside the passenger compartment C, and the interior of the passenger compartment C. The air conditioning unit 200 is provided adjacent to the blower unit 100 in the width direction, and cools or heats the air sent from the blower unit 100 and supplies the air into the passenger compartment C.

  The blower unit 100 includes a blower that is driven by the power of the electric motor, and an air suction unit that adjusts the ratio of the air outside the passenger compartment C and the air inside the passenger compartment C to cause the blower to inhale. ing. The blower unit 100 discharges air in a substantially horizontal direction toward the air conditioning unit 200 adjacent in the width direction of the vehicle.

  As shown in FIG. 4, the air conditioning unit 200 heats the air in the air conditioning case 210, the air conditioning case 210 in which the air can flow, the evaporator 15 for cooling the air flowing in the air conditioning case 210, and the air in the air conditioning case 210. Heater core 16, an air mix damper 220 that adjusts the amount of air heated by the heater core 16 in the air flowing through the air conditioning case 210, a center vent outlet (not shown) and a side vent in the passenger compartment C A first damper 230 for adjusting the flow rate of air blown from an outlet (not shown), and a second damper 240 for adjusting the flow rate of air blown from the defroster outlet in the passenger compartment C; And a third damper 250 for adjusting the flow rate of air blown from a foot blower outlet (not shown).

  The air conditioning case 210 is formed into a hollow box by, for example, injection molding of a synthetic resin material. As shown in FIGS. 2 and 3, the air conditioning case 210 includes a lower case 210 a as a case member located on the lower side and a case member located on one side in the width direction on the upper side (left side, right side in FIG. 3). Formed by assembling the first upper case 210b and the second upper case 210c as a case member located on the other side in the width direction on the upper side (right side, left side in FIG. 3) with fastening members such as bolts and nuts. Is done.

  As shown in FIG. 3, an inflow opening 211 for allowing the air sent from the blower unit 100 to flow in is provided on the front side of the surface of the air conditioning case 210 in the width direction. As shown in FIG. 4, a center vent opening 212 communicating with the center vent outlet is provided at the center in the front-rear direction and the center in the width direction on the upper surface of the air conditioning case 210 so as to face upward. A pair of side vent openings 213 communicating with the side vent outlets are provided on both sides in the width direction of the center vent opening 212 so as to face upward. Further, a defroster opening 214 communicating with the defroster outlet is provided in front of the center vent opening 212 and the pair of side vent openings 213 on the upper surface of the air conditioning case 210 so as to extend in the width direction and face upward. Further, a foot opening 215 communicating with the foot outlet is provided on the rear side of the air conditioning case 210 so as to extend in the width direction and face the lower side.

  In the air conditioning case 210, as shown in FIG. 4, the evaporator 15 is disposed on the front side, and the heater core 16 is disposed on the rear side of the evaporator 15. The evaporator 15 and the heater core 16 are disposed in the air conditioning case 210 with a posture in which the longitudinal direction is directed in the width direction and the short direction is substantially directed in the vertical direction. The evaporator 15 and the heater core 16 are disposed in the air conditioning case 210 in such a posture that an end surface facing the upstream side in the air circulation direction is directed forward and an end surface facing the downstream side in the air circulation direction is directed rearward.

  In the air conditioning case 210, a first air flow passage 216 as an upstream flow passage through which air flowing in from the inflow opening 211 flows toward the evaporator 15, and a downstream flow passage through which the air that has passed through the evaporator 15 flows ( A second air flow passage 217 as a first downstream flow passage) and a downstream flow passage (second downstream flow passage) through which the air passing through the heater core 16 through the second air flow passage 217 flows. Air that flows in from the third airflow passage 218, one or both of the second airflow passage 217 and the third airflow passage 218, and flows out of the center vent opening 212, the side vent opening 213, the defroster opening 214, and the foot opening 215 And a fourth air flow passage 219 serving as a downstream flow passage (second downstream flow passage).

  As shown in FIGS. 5 and 6, the first air flow passage 216 extends from the evaporator 15 toward the inflow opening 211 in a substantially horizontal direction substantially parallel to an end surface facing the upstream side of the air flow direction of the evaporator 15. Yes.

  As shown in FIG. 4, the flow direction of the air flowing through the first air flow passage 216 is set on the surface facing the end surface facing the upstream side in the air flow direction of the evaporator 15 in the first air flow passage 216. The flow direction changing unit 216a and the sub flow direction changing unit 216b are provided.

  The flow direction change part 216a is provided in the up-down direction on the surface of the first air flow passage 216 that faces the end face of the evaporator 15. The flow direction changing portion 216a is formed at one third of the width dimension of the evaporator 15 from the upstream end portion in the air flow direction of the end surface of the evaporator 15 toward the downstream end portion in the first air flow passage 216. It is provided at the corresponding position. The flow direction changing portion 216a is a step whose downstream side protrudes toward the evaporator 15 side with respect to the upstream side of the air flow direction, and the front-rear direction dimension of the first air flow passage 216 on the downstream side of the step is the upstream side of the step. Smaller than the front-rear dimension. In addition, the flow direction changing portion 216a is formed such that, in the vertical direction of the first air flow passage 216, the dimension protruding toward the evaporator 15 is larger on the lower side than on the upper side. The flow direction changing part 216a is formed inside the lower case 210a and inside the first upper case 210b. As shown in FIG. 5, the flow direction changing portion 216a on the first upper case 210b side is formed substantially the same in the vertical direction with a predetermined height dimension H1U, and the flow direction changing portion 216a on the lower case 210a side is As shown in FIG. 6, the height dimension H1L is larger than the height dimension H1U on the first upper case 210b side, and is formed substantially the same in the vertical direction. That is, the flow direction changing unit 216a has a step between the lower case 210a and the first upper case 210b, as shown in FIG.

  The secondary flow direction changing unit 216b is provided in the first air flow passage 216 on the downstream side in the air flow direction of the flow direction changing unit 216a in the vertical direction. The sub-flow direction changing portion 216b is a second third of the width direction dimension of the evaporator 15 from the upstream end portion in the air flow direction of the end surface of the evaporator 15 toward the downstream end portion in the first air flow passage 216. It is provided at a position corresponding to the portion. The sub-circulation direction changing portion 216b is a step whose downstream side protrudes toward the evaporator 15 side with respect to the upstream side of the air flow direction, and the dimension in the front-rear direction of the first air flow passage 216 on the downstream side of the step is a step. It becomes smaller than the dimension in the longitudinal direction on the upstream side. Further, the sub-circulation direction changing portion 216b is formed such that, in the vertical direction of the first air flow passage 216, the dimension protruding toward the evaporator 15 is larger on the upper side than on the lower side. The sub-circulation direction changing part 216b is formed inside the lower case 210a and inside the second upper case 210c. As shown in FIG. 5, the secondary flow direction changing portion 216b on the second upper case 210c side is formed substantially the same in the vertical direction with a predetermined height dimension H2U, and the secondary flow direction changing portion 216b on the lower case 210a side is As shown in FIG. 6, the height dimension H2L is smaller than the height dimension H2U on the second upper case 210c side, and they are formed substantially the same in the vertical direction. The height of the secondary flow direction changing portion 216b differs between the lower case 210a side and the second upper case 210c side. However, the total height dimension (H1L + H2L) of the height dimension H1L of the flow direction changing portion 216a on the lower case 210a side and the height dimension H2L of the sub-flow direction changing portion 216b and the flow direction on the first upper case 210b side. The total height dimension (H1U + H2U) of the height dimension H1U of the change part 216a and the height dimension H2U of the secondary flow direction change part 216b on the second upper case 210c side is configured to be the same height dimension. ing. Therefore, as shown in FIG. 4, the inner surface of the lower case 210a and the inner surface of the second upper case 210c are formed flush with each other on the downstream side in the air flow direction of the sub-flow direction changing portion 216b.

  The second air flow passage 217 is formed on the downstream side in the air flow direction of the evaporator 15, and the rear surface of the upper space 217a communicates with the third air flow passage 218 via the communication portion 217b. The upper surface communicates with the fourth air flow passage 219 via the communication portion 217c.

  The third air flow passage 218 is disposed behind the space 217 a on the upper side of the second air flow passage 217. A partition wall 218a that partitions the second air flow passage 217 and the third air flow passage 218 is provided below the communication portion 217b. The partition wall 218 a is for preventing dew condensation water generated by cooling the air in the evaporator 15 from entering the third air flow passage 218 from the second air flow passage 217. The heater core 16 is disposed in the third air flow passage 218, and the downstream side of the heater core 16 in the air flow direction is curved upward to communicate with the fourth air flow passage 219.

  The fourth air flow passage 219 is disposed above the second air flow passage 217 and the third air flow passage 218. In the fourth air flow passage 219, a flow path communicating with the center vent opening 212 and the pair of side vent openings 213 is opened and closed by the first damper 230, and a flow path communicating with the defroster opening 214 is opened and closed by the second damper 240. The flow path communicating with the foot opening 215 is opened and closed by the third damper 250.

  The air mix damper 220 is a rectangular plate-like member extending in the width direction, and is swingably supported in the air conditioning case 210 via a support shaft that protrudes from one end in the short direction of both ends in the longitudinal direction. . The air mix damper 220 can be driven by an electric motor (not shown), and the opening degree is adjusted according to the temperature of the air blown into the passenger compartment C.

  When the air mix damper 220 rotates the other end side in the short direction downward and rearward to close the communication portion 217b, the communication portion 217c is opened. At this time, a first path through which air flows is formed in the air conditioning case 210 in the order of the first air flow path 216, the second air flow path 217, and the fourth air flow path 219.

  Further, when the air mix damper 220 rotates the other end side in the short-side direction upward and forward to close the communication portion 217c, the communication portion 217b is opened. At this time, in the air conditioning case 210, a second path through which air flows is formed in the order of the first air flow path 216, the second air flow path 217, the third air flow path 218, and the fourth air flow path 219. .

  Further, when the air mix damper 220 is positioned between the communication part 217b and the communication part 217c on the other end side in the short direction, the communication part 217b and the communication part 217c are simultaneously opened. At this time, a first path and a second path are simultaneously formed in the air conditioning case 210.

  The air flow path on the upstream side in the air flow direction of the evaporator 15 in the first path and the second path is substantially parallel to the end face facing the upstream side in the air flow direction of the evaporator 15 from the evaporator 15 toward the upstream side in the air flow direction. It extends in a substantially horizontal direction. Further, the air flow path on the downstream side in the air flow direction of the evaporator 15 in the first path and the second path is the width of the evaporator 15 from the space 217a on the upper side of the second air flow path 217 on the downstream side in the air flow direction of the evaporator 15. It extends upward or backward while maintaining a width dimension substantially the same as the dimension.

  In the vehicle air conditioner configured as described above, the air sent from the blower unit 100 flows into the first air flow passage 216 from the inflow opening 211 of the air conditioning case 210. The air that has flowed into the first air flow passage 216 flows in a substantially horizontal direction, and passes through the evaporator 15 while changing the flow direction backward in the space in front of the evaporator 15. The air that has passed through the evaporator 15 and has flowed into the second air flow passage 217 directly flows into the fourth air flow passage 219 or flows into the fourth air flow passage 219 via the third air flow passage 218. The gas flows out of any one of the vent opening 212, the side vent opening 213, the defroster opening 214, and the foot opening 215.

  Here, the air flow path on the upstream side in the air flow direction of the evaporator 15 in the air conditioning case 210 is substantially horizontal in parallel with the end surface facing the upstream side in the air flow direction of the evaporator 15 from the evaporator 15 toward the inflow opening 211. Extending in the direction. Further, in the air conditioning case 210, the air flow passage on the downstream side in the air flow direction from the evaporator 15 extends upward and backward from the space 217 a on the upper side of the second air flow passage 217 located on the downstream side in the air flow direction of the evaporator 15. It extends. For this reason, the air flowing through the first air flow passage 216 is the end on the inflow opening 211 side in the width direction of the end surface facing the upstream side in the air flow direction of the evaporator 15 in the vertical direction of the first air flow passage 216. It becomes easy to flow in a part away from the part. That is, the air flowing through the first air flow passage 216 is a portion where the lower side in the vertical direction and the inflow opening 211 side in the width direction are difficult to flow on the end face facing the upstream side in the air flow direction of the evaporator 15.

  Further, in a state where the second path is formed in the air conditioning case 210, the lower part of the communication portion 217b that communicates the second air flow path 217 and the third air flow path 218 is partitioned by the partition wall 218a. Accordingly, the air flowing under the second air flow passage 217 is prevented from flowing into the third air flow passage 218 by the partition wall 218a. For this reason, it becomes difficult for air to flow below the second air flow passage 217, and air flowing through the first air flow passage 216 tends to flow biased upward.

  However, a flow direction changing portion 216a is provided on a surface of the first air flow passage 216 that faces the end surface facing the upstream side of the evaporator 15 in the air flow direction. The flow direction changing part 216a is formed such that the height dimension of the lower step is larger than the upper side. Accordingly, the lower side in the vertical direction of the first air flow passage 216 has a large effect of changing the air flow direction to the evaporator 15 side by the flow direction changing unit 216a. Therefore, the air flowing through the first air flow passage 216 is also guided to the lower side in the vertical direction and the inflow opening 211 side in the width direction on the end face facing the upstream side in the air flow direction of the evaporator 15.

  Further, in the first air flow passage 216, a sub-flow direction changing unit 216b is provided on a surface facing the end surface facing the upstream side in the air flow direction of the evaporator 15 on the downstream side of the flow direction changing unit 216a. ing. The sub-circulation direction changing portion 216b is formed such that the height dimension of the upper step is larger than the lower side. Therefore, the upper side in the vertical direction on the downstream side of the air flow direction of the flow direction changing portion 216a of the first air flow passage 216 has a large effect of changing the air flow direction to the evaporator 15 side by the sub flow direction changing portion 216b. For this reason, the air flowing through the first air flow passage 216 is also guided to the upper side in the vertical direction and the central portion in the width direction on the end surface facing the upstream side in the air flow direction of the evaporator 15.

  The air flowing through the first air flow passage 216 is uniformly guided over the entire surface of the evaporator 15 by the flow direction changing unit 216a and the sub-flow direction changing unit 216b, and passes through the evaporator 15.

  Thus, according to the vehicle air conditioner of the present embodiment, the first air flow passage 216 faces the end face facing the upstream side in the air flow direction of the evaporator 15 on the surface facing the evaporator 15 while extending in the vertical direction. The flow direction changing portion 216a is provided to change the flow direction of the air flowing through the first air flow passage 216, and the flow direction changing portion 216a has a protruding dimension toward the evaporator 15 side so that the first air flow The lower side is formed larger than the upper side of the path 216.

  Thereby, the air flowing through the first air flow passage 216 can be uniformly passed over the entire surface of the evaporator 15, so that the heat exchange efficiency between the air and the refrigerant in the evaporator 15 can be improved.

  Further, the flow direction changing part 216a is formed over the vertical direction of the first air flow passage 216.

  Thereby, since it becomes possible to distribute | circulate a part of air which distribute | circulates the 1st airflow path 216 toward the evaporator 15 side by the distribution direction change part 216a over the up-down direction of the 1st airflow path 216, it is an evaporator. Thus, air can be reliably guided to the upstream side in the air flow direction on the end face facing the upstream side in the air flow direction.

  Further, the first air flow passage 216 has a flow direction changing portion 216a on the downstream side in the air flow direction, and extends in the vertical direction and protrudes toward the evaporator 15 side, and flows on the downstream side in the air flow direction of the flow direction changing portion 216a. A sub-flow direction changing unit 216b that changes the flow direction of air is provided.

  Thus, in the first air flow passage 216, the air flow direction is changed to the evaporator 15 side before the air that has passed through the flow direction changing portion 216a is circulated to the downstream end of the first air flow passage 216. Since the flow of air is changed by the wall surface of the downstream end of the flow direction changing unit 216a, the sub flow direction changing unit 216b, and the first air flow passage 216, the second air flow passage In 217, air can be uniformly distributed over the width direction, and air can be blown into the passenger compartment C from the center vent outlet, the side vent outlet, the defroster outlet, and the foot outlet without any lateral deviation. It becomes.

  Further, the auxiliary flow direction changing portion 216b is formed such that the protruding dimension toward the evaporator 15 is larger on the upper side than on the lower side of the upstream flow passage.

  As a result, the upper side in the vertical direction on the downstream side in the air flow direction of the flow direction changing portion 216a of the first air flow passage 216 has a large effect of changing the air flow direction to the evaporator 15 side by the sub flow direction changing portion 216b. Therefore, by changing the air flow direction on the upper side where the flow rate of air is larger than that on the lower side, it is possible to distribute air uniformly in the width direction in the second air flow passage 217.

  In addition, the air conditioning case 210 is configured by assembling the lower case 210a and the first and second upper cases 210b and 210c in the vertical direction, and the flow direction changing unit 216a and the sub-flow direction changing unit 216b include the lower case 210a and the second case 210a. At the connecting portion between the first and second upper cases 210b210c, the projecting dimension toward the evaporator 15 changes.

  Thereby, when forming the member which comprises the air-conditioning case 210 by the injection molding of a synthetic resin material, it becomes possible to form the distribution direction change part 216a and the sub distribution direction change part 216b integrally, and an increase in manufacturing cost Can be suppressed.

  In the above embodiment, the height dimension of the flow direction changing portion 216a is changed through a step between the upper side and the lower side of the first air flow passage 216. However, the present invention is not limited to this. is not. For example, as shown in FIG. 7, the height dimension gradually changes from the upper side to the lower side of the first air flow passage 216 without a step between the upper side and the lower side of the first air flow passage 216. The distribution direction changing unit 216a1 may be used.

  Moreover, in the said embodiment, the flow direction change part 216a and the subflow direction change part 216b are each provided in the surface facing the end surface which faces the upstream of the air flow direction of the evaporator 15 in the 1st airflow path 216. Although what was shown was shown, it is not restricted to this. If at least one flow direction changing portion 216a is provided on the surface of the first air flow passage 216 that faces the end surface facing the upstream side in the air flow direction of the evaporator 15, heat exchange between the air and the refrigerant in the evaporator 15 is performed. Efficiency can be improved. Further, in the first air flow passage 216, a plurality of flow direction change units 216 a and a plurality of sub flow direction change units 216 b may be provided on the surface facing the end surface facing the upstream side in the air flow direction of the evaporator 15. The same effects as in the above embodiment are achieved.

  Moreover, although the said embodiment showed what formed the flow direction change part 216a and the subflow direction change part 216b over the up-down direction of the 1st airflow path 216, respectively, it is not restricted to this. The flow direction change unit 216a and the sub flow direction change unit 216b do not need to be provided in the vertical direction of the first air flow passage 216, for example, the flow direction change unit and the sub flow direction change of a predetermined length, for example. A plurality of parts may be arranged in the vertical direction. In this case, the height dimensions of the flow direction changing unit and the sub-flow direction changing unit arranged on the upper side of the first air flow passage 216 and the flow direction changing unit and the sub-flow direction changing unit arranged on the lower side are set. By using different height dimensions, the same effects as in the above embodiment can be obtained.

  In the above embodiment, the heater core 16 is shown as a heating device for heating the air flowing through the third air flow passage 218, but the present invention is not limited to this. As long as it is a heating device capable of heating the air flowing through the third air flow passage 218, for example, it may be a heat exchanger for exchanging heat between the refrigerant and the air, or air with electric power from a PTC heater or the like. May be used.

  DESCRIPTION OF SYMBOLS 10 ... Air conditioning apparatus for vehicles, 15 ... Evaporator, 16 ... Heater core, 100 ... Air blow unit, 200 ... Air conditioning unit, 210 ... Air conditioning case, 216 ... 1st air flow path, 216a, 216a1 ... Distribution direction change part, 216b ... Sub-flow direction changing section, 217 ... second air flow passage, 217a ... space, 217b, 217c ... communication portion, 218 ... third air flow passage, 218a ... partition wall, 219 ... fourth air flow passage.

Claims (6)

An air conditioning case in which an air flow passage is formed;
A cooling heat exchanger that is disposed in the air flow passage and cools the air flowing through the air flow passage,
The air flow passage has an upstream flow passage located on the upstream side in the air flow direction of the cooling heat exchanger, and a downstream flow passage located on the downstream side in the air flow direction of the cooling heat exchanger,
The upstream side flow passage is formed so as to extend in the horizontal direction parallel to the end face facing the upstream side in the air flow direction of the cooling heat exchanger from the cooling heat exchanger toward the upstream side in the air flow direction.
The downstream flow passage has a first downstream flow passage into which air that has passed through the cooling heat exchanger flows, and a second downstream flow passage that communicates with the space on the upper side of the first downstream flow passage. And
Air that extends in the up-down direction and protrudes toward the cooling heat exchanger side on the surface facing the upstream side in the air flow direction of the cooling heat exchanger in the upstream flow passage and flows through the upstream flow passage A distribution direction changing unit is provided to change the distribution direction of
The airflow conditioner for a vehicle, wherein the flow direction changing portion is formed such that a protruding dimension toward the heat exchanger for cooling is larger on the lower side than on the upper side of the upstream flow passage. The vehicle air conditioner according to claim 1, wherein the flow direction changing unit is formed in a vertical direction of the upstream side flow passage. The flow of air that extends in the vertical direction and protrudes toward the cooling heat exchanger side on the downstream side of the flow direction changing portion in the flow direction changing portion in the upstream flow passage, and flows through the downstream side of the flow direction changing portion in the air flow direction. The vehicle air conditioner according to claim 2, wherein a sub-flow direction changing unit that changes the direction is provided. The vehicular air conditioner according to claim 3, wherein the auxiliary flow direction changing portion is formed such that a protruding dimension toward the cooling heat exchanger is larger on the upper side than on the lower side of the upstream flow passage. The air conditioning case is configured by assembling a plurality of case members in the vertical direction,
The vehicle air conditioner according to claim 4, wherein the distribution direction changing unit and the sub-distribution direction changing unit change a protruding dimension toward the cooling heat exchanger at a connection portion between adjacent case members. The second downstream flow path is provided with a heating device for heating the air,
2. A partition wall for partitioning the first downstream flow path and the second downstream flow path is provided below a communication portion that communicates the first downstream flow path and the second downstream flow path. The vehicle air conditioner according to any one of claims 5 to 5.