Vehicle air conditioning device

Abstract

To provide a vehicle air conditioning device that can sufficiently ensure a foot space for front-seat occupants.SOLUTION: A vehicle air conditioning device (20; 20A; 20B; 20C) is capable of blowing air toward a front seat (12) on which a vehicle occupant can be seated, and a rear seat (13) positioned behind the front seat (12). With a direction of airflow as a reference, a rear-seat warm air passage (RH) for guiding the blown air passing through a heating heat exchanger (33) to the rear seat (13) is provided on a downstream side of the heating heat exchanger (33). The rear-seat warm air passage (RH) is located between a cooling heat exchanger (32) and the heating heat exchanger (33). A rear-seat temperature control door (70; 70C) is positioned such that its lower end is located on a cold air passage (CP) side relative to a lower wall section (64; 64A; 64B; 64C), is also positioned below the upper end of the lower wall section (64; 64A; 64B; 64C) and includes a first water intrusion suppression section (73; 73C) that suppresses influx of water from a cold air intake opening (62).SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to an air conditioning system for a vehicle capable of blowing air to a rear seat. [Background technology]

[0002] Many vehicles are equipped with vehicle air conditioners to adjust the temperature inside the vehicle. Some vehicle air conditioners are capable of blowing air to the rear seats. A conventional technology related to such vehicle air conditioners is disclosed in Patent Document 1.

[0003] The vehicle air conditioner disclosed in Patent Document 1 includes a housing provided with a cooling heat exchanger capable of cooling the blown air, and a heating heat exchanger capable of heating the air that has passed through the cooling heat exchanger. A duct is provided behind the heating heat exchanger, extending toward the rear seats, for blowing air to the passengers in the rear seats. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2010-36738 A Summary of the Invention [Problem to be solved by the invention]

[0005] Typically, an air conditioner for a vehicle is disposed in front of the front seats, and if a duct for blowing air to the rear seats protrudes significantly rearward of the air conditioner, the space under the feet of the front seat passengers will be reduced.

[0006] An object of the present invention is to provide a vehicle air conditioner that can ensure sufficient leg space for front seat passengers. [Means for solving the problem]

[0007] In the following description, reference numerals in the accompanying drawings are placed in parentheses to facilitate understanding of the present invention, but the present invention is not limited to the illustrated form.

[0008] According to the present disclosure, air can be blown toward a front seat (12) in which a vehicle occupant can be seated and a rear seat (13) disposed behind the front seat (12), A cooling heat exchanger (32) capable of cooling the blown air and a heating heat exchanger (33) capable of heating the air that has passed through the cooling heat exchanger (32) are provided in an internal space (IS) of the housing (50); the heating heat exchanger (33) is provided rearward of the cooling heat exchanger (32) with respect to the traveling direction of the vehicle; In the internal space (IS), a cold air flow path (CP) through which the blown air that has passed only through the cooling heat exchanger (32) flows, a hot air flow path (HP) through which the blown air that has passed through the heating heat exchanger (33) flows, and a mixing flow path (MP) through which the blown air that has flowed through the cold air flow path (CP) and the blown air that has flowed through the hot air flow path (HP) are mixed, a rear seat air blowing member (60; 60A; 60B; 60C) for guiding the air that has passed through the heating heat exchanger (33) to the rear seat (13) is provided downstream of the heating heat exchanger (33) with respect to the flow direction of the air blown; the rear seat air blower member (60; 60A; 60B; 60C) extends in the vertical direction between the cooling heat exchanger (32) and the heating heat exchanger (33), and has a cold air intake opening (62) opened to take in air passing through the cold air flow path (CP), and a lower wall portion (64; 64A; 64B; 64C) whose upper end extends to the cold air intake opening (62); The opening degree of the cold air intake opening (62) can be adjusted by a rear seat temperature control door (70; 70C), The rear seat temperature control door (70; 70C) has a lower end located on the cold air flow path (CP) side relative to the lower wall portion (64; 64A; 64B; 64C) and is located lower than an upper end of the lower wall portion (64; 64A; 64B; 64C), and includes a first water intrusion suppression portion (73; 73C) that suppresses water intrusion from the cold air intake opening (62). Effect of the Invention

[0009] According to the present invention, it is possible to provide a vehicle air conditioner that can ensure sufficient leg space for front seat passengers. [Brief description of the drawings]

[0010] [Figure 1] 1 is a schematic diagram of a vehicle equipped with a vehicle air conditioner according to a first embodiment. [Diagram 2] FIG. 2 is a perspective view of the vehicle air conditioner shown in FIG. [Diagram 3] 3 is a cross-sectional view taken along line 3-3 of FIG. 2. [Figure 4] FIG. 4 is an enlarged view of part 4 of FIG. [Diagram 5] FIG. 6 is an enlarged cross-sectional view of a main part of a vehicle air conditioner according to a second embodiment. [Figure 6] 6 is a cross-sectional view taken along line 6-6 in FIG. 5. [Figure 7] FIG. 11 is an enlarged cross-sectional view of a main part of a vehicle air conditioner according to a third embodiment. [Figure 8] 8 is a cross-sectional view taken along line 8-8 in FIG. 7. [Figure 9] FIG. 11 is a cross-sectional view of a vehicle air conditioner according to a fourth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] An embodiment of the present invention will be described below with reference to the attached drawings. In the description, "front and rear" refers to front and rear based on the traveling direction of the vehicle in which the automotive air conditioner is installed, and "left and right" refers to left and right based on the vehicle occupants. In the drawings, Fr refers to the front based on the traveling direction of the vehicle, Rr refers to the rear based on the traveling direction of the vehicle, Le refers to the left as seen by the occupants, Ri refers to the right as seen by the occupants, Up refers to the top, and Dn refers to the bottom.

[0012] <Example 1> Please refer to Fig. 1. Fig. 1 shows a vehicle 10 equipped with an air conditioner 20 for vehicles (hereinafter referred to as "air conditioner 20"). The vehicle 10 is, for example, a passenger car, and has left and right front seats 12, 12 provided at the front of the passenger compartment VI, and a rear seat 13 provided behind the front seats 12, 12 across both ends in the vehicle width direction.

[0013] The air conditioning device 20 is provided in front of the front seats 12, 12, and is used to blow air conditioned to a predetermined temperature to the occupants in the front seats 12, 12 and the rear seat 13. Side vent switching units 14, 14 that can switch whether or not to blow out the blown air are formed in front of the front seats 12 at the right and left ends in the vehicle width direction, respectively. Center vent switching units 15, 15 that can switch whether or not to blow out the blown air are formed in front of the front seats 12, at the center in the vehicle width direction.

[0014] A rear duct 16 extending toward the rear seat 13 is connected to the air conditioning device 20, and air can be sent to the rear seat 13 via the rear duct 16. A rear seat air blowing switching unit 17 that can switch whether or not air is blown to the rear seat 13 is provided at the rear end or downstream end of the rear duct 16.

[0015] The rear duct 16 may be arranged, for example, so as to extend rearward along the lower surface of the center console and also so as to extend upward along the rear surface of the center console. Alternatively, it may be arranged so as to pass under the floor of the vehicle interior and stand up along the B-pillar. Also, it may be arranged so as to branch midway and be able to blow air to the upper and lower bodies of rear seat passengers.

[0016] Each of the switching sections 14, 15, 17 is formed of a louver, and the passenger can switch the airflow amount from fully open to fully closed by swinging the operating section 14a, 15a, 17a.

[0017] Please refer to Fig. 2. The air conditioner 20 has an air blower unit 21 capable of taking in air from inside the vehicle cabin and / or outside the vehicle and blowing it out, and a temperature adjustment unit 30 capable of adjusting the air blown from the air blower unit 21 to a predetermined temperature. The air blown to the left from the air blower unit 21 flows rearward inside the temperature adjustment unit 30.

[0018] The blower unit 21 can have a known configuration, for example, a built-in blower fan.

[0019] The air conditioner 20 may be configured so that the blower unit 21 is disposed on the left side of the temperature adjustment unit 30. This can be appropriately selected depending on the left-right position of the steering wheel, etc.

[0020] 3, the temperature adjustment unit 30 includes a housing 50 to which the blown air from the blower unit 21 (see FIG. 2) is sent, a cooling heat exchanger 32 that is provided in an internal space IS of the housing 50 and is capable of cooling the blown air, a heating heat exchanger 33 that is capable of heating the air that has passed through the cooling heat exchanger 32, a front seat temperature adjustment device 34 that is provided downstream of the heating heat exchanger 33 and adjusts the amount of blown air that passes through the heating heat exchanger 33, and an open-type air conditioner 35 that is provided downstream of the front seat temperature adjustment device 34. The vehicle has a defroster opening / closing door 36, a vent opening / closing door 37, and a foot opening / closing door 38 that switch the opening and closing of the openings 51-54, a rear seat air blower member 60 that extends downward in front of the heating heat exchanger 33 and guides air that has passed through the heating heat exchanger 33 to the rear seat 13 (see Figure 1), and a rear seat temperature adjustment door 70 that is swingably mounted on the rear seat air blower member 60 and adjusts the temperature of the air blown to the rear seat 13 by adjusting the amount of cool air and hot air introduced into the rear seat air blower member 60.

[0021] The housing 50 is composed of, for example, a plurality of parts. More specifically, it is composed of three parts: parts constituting the left and right upper parts, and a part constituting the lower part. An injection molded product can be used for each part. The housing 50 may be composed of two parts, or may be composed of four or more parts.

[0022] Also see Fig. 1. The housing 50 is provided with a defroster opening 51 through which the ventilated air to be sent to the windshield passes, vent openings 52 and 53 through which the ventilated air to be sent to the upper bodies of the occupants in the front seats 12 passes, a foot opening 54 through which the ventilated air to be sent to the feet of the occupants in the front seats 12 passes, and a rear opening 55 through which the ventilated air to be sent to the occupants in the rear seats 13 passes.

[0023] The internal space IS also has a cold air flow path CP through which the blown air that has passed only through the cooling heat exchanger 32 flows, a hot air flow path HP through which the blown air that has passed through the heating heat exchanger 33 flows, and a mixing flow path MP in which the blown air that has flowed through the cold air flow path CP and the blown air that has flowed through the hot air flow path HP are mixed.

[0024] The vent openings 52, 53 include a side vent opening 52 through which the air blown out from the side vent switching portion 14 passes, and a center vent opening 53 through which the air blown out from the center vent switching portion 15 passes.

[0025] It is not necessary that the vent openings 52, 53 are formed at two locations each for the center and outer sides of the vehicle width.

[0026] Please refer to Fig. 3. The cooling heat exchanger 32 is provided at the front of the housing 50 so that the blown air passes through in a substantially front-rear direction. The blown air is cooled by heat exchange with a heat medium passing through the inside of the cooling heat exchanger 32. For example, a fluorocarbon-based refrigerant or carbon dioxide can be used as the heat medium.

[0027] The heating heat exchanger 33 is provided behind the cooling heat exchanger 32 and is provided so that the blown air passes through it in a substantially vertical direction. The heating heat exchanger 33 is composed of, for example, a hot water heater 33a through which hot water heated by passing through an engine flows, and an electric heater 33b which is heated by passing electricity through it.

[0028] In the state shown in the figure, a part of the blown air that has passed through the cooling heat exchanger 32 passes through the left and right sides of the rear seat blower member 60, is guided below the heating heat exchanger 33, and flows upward. At this time, the blown air is heated by the heating heat exchanger 33.

[0029] The heat exchanger 33 for heating does not necessarily have to be composed of both the hot water heater 33a and the electric heater 33b, and may be composed of only one of them. The hot water flowing inside the hot water heater 33a may be heated by the heat of the engine, or may be heated by a heat medium other than hot water or an electrically-operated heating wire. Furthermore, a heater in which a heat medium other than hot water flows directly inside can also be used. For example, a fluorocarbon-based refrigerant or carbon dioxide can be used as the heat medium.

[0030] The front seat temperature control device 34 has a front seat temperature control actuator (not shown) that generates a rotational driving force when energized, a driving force transmission shaft that has a pinion gear 34a and is connected to the front seat temperature control actuator to rotate, and a door body 34b that is fitted with the pinion gear 34a and slides substantially in the front-rear direction as the driving force transmission shaft rotates. The door body 34b includes a rack that meshes with the pinion gear 34a.

[0031] The movement of the door body 34b adjusts the opening amount of the cold air flow path CP and the hot air flow path HP. This adjusts the amount of cold air and the amount of hot air flowing into the mixing flow path MP, and the air is at a predetermined temperature when mixed in the mixing flow path MP.

[0032] The front seat temperature control device 34 may be configured as a swing door that is rotatable around a rotation axis, instead of a slide door.

[0033] The defroster opening / closing door 36 is configured as a swing door, and the opening amount of the defroster opening 51 can be adjusted by swinging it.

[0034] The vent opening / closing door 37 is configured as a swing door, and the opening amount of the vent openings 52, 53 can be adjusted by swinging it.

[0035] The foot opening / closing door 38 is a swing door, and the amount of opening of the foot opening 54 can be adjusted by swinging it.

[0036] The rear seat air blower member 60 is a duct-shaped member extending in the vertical direction in front of the heating heat exchanger 33. The left-right width of the rear seat air blower member 60 is formed smaller than the left-right width of the heating heat exchanger 33. This allows the air that has passed through the cooling heat exchanger 32 to pass through the left and right of the rear seat air blower member 60 and flow to the heating heat exchanger 33. An upper end of the rear seat air blower member 60 faces the downstream end of the heating heat exchanger 33, and a lower end of the rear seat air blower member 60 is connected to the rear duct 16.

[0037] The rear seat air blower member 60 has a hot air introduction section 61 facing the hot air flow path HP and capable of taking in hot air, a cold air intake opening 62 facing the cold air flow path CP and opened to take in cold air, an upper wall section 63 extending from an upper end to the cold air intake opening 62, and a lower wall section 64 extending from a lower end to the cold air intake opening 62. The cold air intake opening 62, the upper wall section 63, and the lower wall section 64 are formed on the front surface of the duct-shaped rear seat air blower member 60.

[0038] The cold air intake opening 62 is an opening provided in the center in the vehicle width direction on the front surface of the rear seat air blower member 60. The rear seat air blower member 60 has middle wall portions (not shown) adjacent to both ends in the vehicle width direction of the cold air intake opening 62 and connecting the upper wall portion 63 and the lower wall portion 64. The middle wall portion may be provided in the center of the cold air intake opening 62 to increase the rigidity of the cold air intake opening 62. Alternatively, the middle wall portion may not be provided and the cold air intake opening 62 may be formed over the entire length in the vehicle width direction on the front surface of the rear seat air blower member 60.

[0039] The interior of the rear seat blower member 60 has a rear seat hot air flow path RH through which the blown air warmed by the heating heat exchanger 33 passes, and a rear seat mixed flow path RM in which the hot air that has passed through the rear seat hot air flow path RH and the cold air introduced from the cold air intake opening 62 are mixed. The rear seat hot air flow path RH and the rear seat mixed flow path RM can be said to be flow paths for guiding the blown air that has passed through the heating heat exchanger 33 to the rear seat 13 (see FIG. 1). The rear seat hot air flow path RH and the rear seat mixed flow path RM are provided between the cooling heat exchanger 32 and the heating heat exchanger 33.

[0040] Many parts of the rear seat air blower 60 face the cold air flow path CP. For this reason, there is a concern that the air flowing through the rear seat air blower 60 may be unintentionally cooled. In this case, for example, a heat insulating material such as urethane foam may be attached to the periphery of the rear seat air blower 60, or the rear seat air blower 60 itself may be made of foamed resin, thereby improving the heat insulating property and preventing unintentional heat exchange. Such heat insulating measures are not necessarily implemented, and are appropriately selected in consideration of the blowing temperature of the conditioned air blown out from the air conditioner 20, the cost, etc. In addition, when a heat insulating material is attached to the rear seat air blower 60, the place may be the outer surface of the rear seat air blower 60, or the inner surface facing the rear seat hot air flow path RH.

[0041] The rear seat air blower member 60 may be formed integrally with the housing 50 or may be configured as a separate member from the housing 50.

[0042] An upper portion of the lower wall portion 64 is bent toward the inside of the rear seat blower member 60 to form a valve seat portion 64s which serves as a valve seat for the rear seat temperature control door 70 when the cold air intake opening 62 is fully closed.

[0043] The rear seat temperature adjustment door 70 has, for example, a door axis portion 71 that rotates when a motor (not shown) is operated, a hot air flow rate adjustment portion 72 that extends from the door axis portion 71 toward the rear seat hot air flow path RH and adjusts the flow rate of hot air flowing into the rear seat mixing flow path RM, and a first water intrusion suppression portion 73 that extends from the door axis portion 71 toward the cold air flow path CP and suppresses water intrusion from the cold air intake opening 62.

[0044] The upper end of the door shaft portion 71 is located slightly above the upper end of the cold air intake opening 62. At least a portion of the front surface of the door shaft portion 71 is covered by the upper wall portion 63. The portion of the upper wall portion 63 covering the door shaft portion 71 is curved in an arc shape along the outer circumferential surface of the door shaft portion 71. The end of the upper wall portion 63 extends to a position close to the first water intrusion suppression portion 73 when the cold air intake opening 62 is fully open.

[0045] The lower end of the first water intrusion suppression part 73 is located on the cold air flow path CP side with respect to the lower wall part 64. Moreover, the lower end of the first water intrusion suppression part 73 is located below the upper end of the lower wall part 64 in any state from when the cold air intake opening part 62 is fully open to when it is fully closed.

[0046] The door shaft portion 71 rotates according to the temperature setting of the air to be blown to the rear seat 13 (see FIG. 1), and adjusts the flow rate of hot air and cold air flowing through the rear seat air blowing member 60, so that the hot air and cold air are mixed together to reach the specified temperature.

[0047] The rear seat temperature control door 70 can swing from a fully open state of the cold air intake opening 62 shown by a solid line in Fig. 3 to a fully closed state of the cold air intake opening 62 shown by a two-dot chain line. The fully open state of the cold air intake opening 62 can also be said to be a fully closed state of the rear seat hot air flow path RH, and the fully closed state of the cold air intake opening 62 can also be said to be a fully open state of the rear seat hot air flow path RH. When the cold air intake opening 62 is fully open, the temperature of the blown air sent to the rear seat 13 (see Fig. 1) is the lowest, and when the cold air intake opening 62 is fully closed, the temperature of the blown air sent to the rear seat 13 is the highest.

[0048] <Example 2> Second Embodiment Next, an air conditioner 20A according to a second embodiment will be described with reference to the drawings.

[0049] 5 shows an enlarged cross-sectional view of a main part of an air conditioner 20A (temperature adjustment unit 30A) according to the second embodiment. The air conditioner 20A according to the second embodiment differs in the configuration of a rear seat air blower member 60A. The same reference numerals are used for parts common to the first embodiment, and detailed descriptions thereof will be omitted.

[0050] The rear seat air blower member 60A has a hot air introduction section 61 facing the hot air flow path HP and capable of taking in hot air, a cold air intake opening 62 facing the cold air flow path CP and opened to take in cold air, an upper wall section 63A extending from an upper end to the cold air intake opening 62, and a lower wall section 64A extending from a lower end to the cold air intake opening 62.

[0051] The upper wall portion 63A includes a second water intrusion prevention portion 63Aa extending further downward from the portion covering the door shaft portion 71. The second water intrusion prevention portion 63Aa extends downward beyond the upper end of the lower wall portion 64A.

[0052] The upper end of the lower wall portion 64A serves as a valve seat portion 64As against which the first water intrusion suppression portion 73 abuts when closing the cold air intake opening 62. The upper end of the valve seat portion 64As is folded back toward the outside. The reason for this will be described later.

[0053] 6, the lower wall portion 64A is curved (inclined) from the outer side toward the center in the width direction so as to continuously move away from the cooling heat exchanger 32, and the central portion is further formed into a groove portion 64At in the shape of a trapezoidal groove.

[0054] The peripheral portion of the groove 64At on the front surface of the lower wall 64A does not necessarily have to be curved (inclined) and may be formed in a flat shape. Also, the entire front surface of the lower wall 64A may be formed in a groove shape.

[0055] <Example 3> Third Embodiment Next, an air conditioner 20B according to a third embodiment will be described with reference to the drawings.

[0056] 7 shows an enlarged cross-sectional configuration of a main part of an air conditioner 20B (temperature adjustment unit 30B) according to Example 3. The air conditioner 20B according to Example 3 differs in the configuration of a rear seat air blower member 60B. The same reference numerals are used for parts common to Example 1 and / or Example 2, and detailed description thereof will be omitted.

[0057] The rear seat air blower member 60B has a hot air introduction section 61 facing the hot air flow path HP and capable of taking in hot air, a cold air intake opening 62 facing the cold air flow path CP and opened to take in cold air, an upper wall section 63B extending from an upper end to the cold air intake opening 62, and a lower wall section 64B extending from a lower end to the cold air intake opening 62.

[0058] The upper end of the lower wall portion 64B is a valve seat portion 64Bs that comes into contact with the first water intrusion suppression portion 73 when the first water intrusion suppression portion 73 closes the cold air intake opening 62. The valve seat portion 64Bs is inclined toward the flow path of the rear seat air blower member 60B at the lower portion and gradually inclined toward the vertical direction toward the upper portion. The upper end of the valve seat portion 64Bs is inclined toward the cooling heat exchanger 32.

[0059] Please refer to Fig. 8. With respect to a plane perpendicular to the flow direction of the blown air, the lower wall portion 64B is closest to the cooling heat exchanger 32 at the center and gradually becomes farther away from the cooling heat exchanger 32 toward the outside.

[0060] <Example 4> Next, an air conditioner 20C according to a fourth embodiment will be described with reference to the drawings.

[0061] 9 shows a cross-sectional configuration of an air conditioner 20C (temperature adjustment unit 30C) according to Example 4. The air conditioner 20C according to Example 4 differs in the configuration of a rear seat air blower member 60C. The same reference numerals are used for parts common to any of Examples 1 to 3, and detailed descriptions thereof will be omitted.

[0062] The rear seat air blower member 60C has a hot air introduction section 61 facing the hot air flow path HP and capable of taking in hot air, a cold air intake opening 62 facing the cold air flow path CP and opened to take in cold air, an upper wall section 63C extending from an upper end to the cold air intake opening 62, and a lower wall section 64C extending from a lower end to the cold air intake opening 62. The cold air intake opening 62, the upper wall section 63C, and the lower wall section 64C are formed on the rear surface of the rear seat air blower member 60C, opposite to the above-mentioned air conditioners 20, 20A, and 20B.

[0063] The rear seat temperature control door 70C, which opens and closes the cold air intake opening 62, is made up of a door shaft 71 as a rotating shaft, and a first water intrusion suppression part 73C that extends downward from the door shaft 71 and suppresses the intrusion of water droplets scattered from the cooling heat exchanger 32 into the interior. The above-mentioned hot air flow rate adjustment part 72 (see FIG. 3) is not included. The lower end of the first water intrusion suppression part 73C is located below the upper end of the lower wall part 64C.

[0064] The air conditioners 20, 20A, 20B, and 20C described above will be summarized below.

[0065] Please refer to Fig. 1. First, the air conditioner 20 can send air toward a front seat 12 in which a vehicle occupant can be seated and a rear seat 13 disposed behind the front seat 12.

[0066] 3. In the air conditioner 20, a cooling heat exchanger 32 capable of cooling the blown air and a heating heat exchanger 33 capable of heating the air that has passed through the cooling heat exchanger 32 are provided in an internal space IS of a housing 50. The heating heat exchanger 33 is provided behind the cooling heat exchanger 32 with respect to the traveling direction of the vehicle. In the internal space IS, a cold air flow path CP through which the blown air that has passed only through the cooling heat exchanger 32 flows, a hot air flow path HP through which the blown air that has passed through the heating heat exchanger 33 flows, and a mixing flow path MP through which the blown air that has flowed through the cold air flow path CP and the blown air that has flowed through the hot air flow path HP are mixed are formed.

[0067] A rear seat air blowing member 60 is provided downstream of the heating heat exchanger 33 with respect to the flow direction of the blown air, for guiding the blown air that has passed through the heating heat exchanger 33 to the rear seat 13. The rear seat air blowing member 60 extends vertically between the cooling heat exchanger 32 and the heating heat exchanger 33, and has a cold air intake opening 62 that is opened to take in the blown air that passes through the cold air flow path CP, and a lower wall portion 64 whose upper end extends to the cold air intake opening 62. The cold air intake opening 62 is adjustable in opening degree by a rear seat temperature adjustment door 70, and the rear seat temperature adjustment door 70 includes a first water intrusion suppression portion 73 whose lower end is located on the cold air flow path CP side with respect to the lower wall portion 64 and which is located below the upper end of the lower wall portion 64 and suppresses the intrusion of water from the cold air intake opening 62.

[0068] The rear seat hot air flow path RH is provided between the cooling heat exchanger 32 and the heating heat exchanger 33. This allows the rear duct 16 (see FIG. 1) and the like to be connected while avoiding the rear lower part of the housing 50. Sufficient space can be secured for the feet of passengers in the front seats 12 (see FIG. 1).

[0069] 4. Furthermore, based on the cold air intake opening 62 being fully open, the lower end of the rear seat temperature control door 70 is located on the cold air flow path CP side and is located below the upper end of the lower wall portion 64. During operation of the cooling heat exchanger 32, water vapor in the internal space IS forms droplets and adheres to the surface of the cooling heat exchanger 32. When air is blown toward the cooling heat exchanger 32, the water droplets adhered to the surface of the cooling heat exchanger 32 by the blown air are scattered in the internal space IS. When the rear seat temperature control door 70 opens the cold air intake opening 62, there is a risk that the water droplets scattered from the cooling heat exchanger 32 will enter the rear seat air blower member 60. Because the lower end of the rear seat temperature control door 70 extends below the cool air flow path CP and the upper end of the lower wall portion 64, scattered water droplets cannot penetrate into the rear seat air blower member 60 unless they rise from below the rear seat temperature control door 70 to above. In other words, it is possible to prevent water droplets from penetrating into the rear seat air blower member 60. The same applies to the air conditioners 20A (see FIG. 5), 20B (see FIG. 7), and 20C (see FIG. 9).

[0070] Secondly, in the first air conditioner 20, the first water intrusion suppression portion 73 extends downward from the upper end of the cold air intake opening 62 and can swing around the cold air intake opening 62 so as to adjust the opening amount of the cold air intake opening 62. It is possible to suppress the intrusion of water droplets while adjusting the amount of cold air taken in by the rear seat blower member 60. The same applies to the air conditioners 20A (see FIG. 5), 20B (see FIG. 7), and 20C (see FIG. 9).

[0071] See Fig. 5. Thirdly, in the first or second air conditioner 20A, the rear seat air blower member 60A has an upper wall portion 63A extending from the upper end to the cold air flow path CP. The upper wall portion 63A includes a second water intrusion suppression portion 63Aa that extends below the upper end of the lower wall portion 64A between the cooling heat exchanger 32 and the first water intrusion suppression portion 73 and suppresses water intrusion from the cold air intake opening 62. This can further suppress the intrusion of water droplets into the rear seat air blower member 60. The same applies to the air conditioner 20B (see Fig. 7).

[0072] See Fig. 7. Fourthly, in any of the first to third air conditioners 20B, the inclination angle of the lower wall portion 64B approaches vertical as it approaches the cold air intake opening 62. This makes it difficult for water droplets to reach the upper end of the lower wall portion 64B, and thus makes it possible to suppress the intrusion of water droplets. If the upper end is inclined toward the cooling heat exchanger 32 rather than vertically, this is preferable because it makes it possible to further suppress the intrusion of water droplets.

[0073] See Fig. 8. Fifth, in any of the first to fourth air conditioners 20B, the lower wall portion 64B has a center portion located at the front end in the direction along the width of the vehicle, on the front surface facing the cooling heat exchanger 32 (see Fig. 7). Water droplets tend to collect at the left and right ends, and the collected water droplets fall under their own weight, thereby making it possible to suppress intrusion of water droplets adhering to the lower wall portion 64B.

[0074] See Fig. 6. Sixth, in any of the first to fourth air conditioners 20A, the lower wall portion 64A has a groove portion 64At extending in the vehicle up-down direction on the front surface facing the cooling heat exchanger 32 (see Fig. 5), and the groove portion 64At is concave so as to move away from the cooling heat exchanger 32. Water droplets tend to gather in the center, and the gathered water droplets fall under their own weight, thereby preventing the water droplets adhering to the lower wall portion 64A from penetrating. When the front surface of the lower wall portion 64A is inclined toward the groove portion 64At or when the entire front surface is formed of the groove portion 64At, the water droplets can be further guided toward the groove portion 64At, which is preferable.

[0075] See Fig. 5. Seventh, in any of the first to sixth air conditioners 20A, the lower wall portion 64A has an upper end (valve seat portion 64As) folded back toward the cooling heat exchanger 32. By folding back, it is possible to suppress the intrusion of water droplets that have adhered to the lower wall portion 64A and risen by the force of the blown air.

[0076] The components of each embodiment can be appropriately combined. For example, the upper end of the lower wall of the air conditioner of the first, third, and fourth embodiments can be bent toward the cooling heat exchanger 32. A groove may be formed in the lower wall of the air conditioner of the first and fourth embodiments. A second water intrusion suppression portion may be formed in the air conditioner of the first and fourth embodiments. The upper end of the lower wall of the first, second, and fourth embodiments can be gradually shaped to be closer to vertical. The lower wall of the first and fourth embodiments can be curved so that the center of the width direction protrudes most. As long as the operation and effect of the present invention are achieved, the present invention is not limited to the embodiments. [Industrial Applicability]

[0077] The air conditioner of the present invention is suitable for use in an air conditioner mounted in a passenger vehicle. [Explanation of symbols]

[0078] 12…Front seat 13…Rear seat 20, 20A, 20B, 20C...Vehicle air conditioning device 32…Cooling heat exchanger 33…Heating heat exchanger 50…Housing 60, 60A, 60B, 60C... Rear seat ventilation member 62...Cold air intake opening 63, 63A, 63B, 63C...Top wall part 64, 64A, 64B, 64C...Lower wall part 70, 70C... Rear seat temperature control door 73…First water ingress prevention section IS…interior space CP…Cold air flow path HP…Hot air flow path MP…Mixing channel

Claims

1. The air conditioner is capable of blowing air toward a front seat (12) in which a vehicle occupant can be seated and a rear seat (13) disposed behind the front seat (12); A cooling heat exchanger (32) capable of cooling the blown air and a heating heat exchanger (33) capable of heating the air that has passed through the cooling heat exchanger (32) are provided in an internal space (IS) of the housing (50); With respect to the traveling direction of the vehicle, the heating heat exchanger (33) is provided rearward of the cooling heat exchanger (32), In the internal space (IS), a cold air flow path (CP) through which the blown air that has passed only through the cooling heat exchanger (32) flows, a hot air flow path (HP) through which the blown air that has passed through the heating heat exchanger (33) flows, and a mixing flow path (MP) through which the blown air that has flowed through the cold air flow path (CP) and the blown air that has flowed through the hot air flow path (HP) are mixed are formed. A rear seat air blowing member (60; 60A; 60B; 60C) for guiding the air that has passed through the heating heat exchanger (33) to the rear seat (13) is provided downstream of the heating heat exchanger (33) with respect to the flow direction of the air blown, the rear seat air blower member (60; 60A; 60B; 60C) extends in the vertical direction between the cooling heat exchanger (32) and the heating heat exchanger (33), and has a cold air intake opening (62) opened to take in air passing through the cold air flow path (CP), and a lower wall portion (64; 64A; 64B; 64C) whose upper end extends to the cold air intake opening (62), The opening degree of the cold air intake opening (62) can be adjusted by a rear seat temperature control door (70; 70C), The rear seat temperature control door (70; 70C) has a lower end located on the cold air flow path (CP) side relative to the lower wall portion (64; 64A; 64B; 64C) and is located lower than an upper end of the lower wall portion (64; 64A; 64B; 64C), and includes a first water intrusion suppression portion (73; 73C) that suppresses water intrusion from the cold air intake opening (62).

2. 2. The vehicle air conditioning system of claim 1, wherein the first water intrusion prevention portion (73; 73C) extends downward from an upper end of the cold air intake opening (62) and is swingable around the cold air intake opening (62) to adjust the amount of opening of the cold air intake opening (62).

3. The rear seat air blowing member (60A; 60B) has an upper wall portion (63A) extending from an upper end to the cold air flow path (CP), 2. The vehicle air conditioning system of claim 1, wherein the upper wall portion (63A) extends below an upper end of the lower wall portion (64A; 64B) between the cooling heat exchanger (32) and the first water ingress prevention portion (73) and includes a second water ingress prevention portion (63Aa) that suppresses water ingress from the cold air intake opening (62).

4. 2. The vehicle air conditioning system according to claim 1, wherein the lower wall portion (64B) has an inclination angle approaching a vertical as it approaches the cold air intake opening (62).

5. 2. The vehicle air conditioning system according to claim 1, wherein a center portion of the lower wall portion (64B) is located at the front end thereof facing the cooling heat exchanger (32) in a direction along the width of the vehicle.

6. 2. The vehicle air conditioning device according to claim 1, wherein the lower wall portion (64A) has a groove portion (64At) extending in the vehicle vertical direction on a front surface facing the cooling heat exchanger (32), and the groove portion (64At) is concave so as to move away from the cooling heat exchanger (32).

7. 7. The vehicle air conditioning system according to claim 1, wherein an upper end of the lower wall portion (64A) is folded back toward the cooling heat exchanger (32).

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