Vehicle air conditioner

Abstract

Provided is a vehicle air conditioner capable of ensuring a sufficient foot space for a front seat occupant. A vehicle air conditioner (20; 20A; 20B; 20A, 20B) can blow air towards a front seat (12) on which a vehicle occupant can sit and a rear seat (13) arranged behind the front seat (12). A rear seat hot air passage (RH) for guiding the blowing air, which has passed through the heating heat exchanger (33), to the rear seat (13) with respect to the flow direction of the blowing air is provided on the downstream side of the heating heat exchanger (33). A rear seat hot air passage (RH) is provided between the cooling heat exchanger (32) and the heating heat exchanger (33).

Description

Technical Field

[0001] The present invention relates to a vehicle air conditioner capable of blowing air to a rear seat. Background Art

[0002] Many vehicles are equipped with a vehicle air conditioner to adjust the temperature in the vehicle cabin. Some vehicle air conditioners can blow air to the rear seat. Background technology related to such a vehicle air conditioner is disclosed in PTL 1.

[0003] The vehicle air conditioner disclosed in PTL 1 is provided with a cooling heat exchanger and a heating heat exchanger in a housing. The cooling heat exchanger can cool the blown air, and the heating heat exchanger can heat the air that has passed through the cooling heat exchanger. Behind the heating heat exchanger, a duct extending toward the rear seat is provided to blow air toward the rear seat occupants.

[0004] [Citation List]

[0005] [Patent Document]

[0006] PTL 1:JP2010-36738A Summary of the invention

[0007] [Technical issues]

[0008] Generally, a vehicle air conditioner is arranged in front of a front seat. In the case where a duct for blowing air to a rear seat protrudes far behind the vehicle air conditioner, a foot space for a front seat passenger is reduced.

[0009] An object of the present invention is to provide a vehicle air conditioner capable of ensuring sufficient foot room for front seat passengers.

[0010] [Solution to the problem]

[0011] In the following description, reference numerals in the drawings are appended in parentheses to facilitate understanding of the present invention, but the present invention is not limited to the illustrated embodiments.

[0012] The present invention provides a vehicle air conditioner capable of blowing air toward a front seat (12) on which a vehicle occupant can sit and a rear seat (13) arranged behind the front seat (12).

[0013] 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 the internal space (IS) of the housing (50).

[0014] The heating heat exchanger (33) is arranged behind the cooling heat exchanger (32) relative to the vehicle's forward direction, and

[0015] The internal space (IS) is formed with: a cold air flow path (CP) through which the blowing air that has passed through the cooling heat exchanger (32) flows; a hot air flow path (HP) through which the blowing air that has passed through the heating heat exchanger (33) flows; and a mixed flow path (MP) in which the blowing air that has passed through the cold air flow path (CP) and the blowing air that has passed through the hot air flow path (HP) are mixed, wherein

[0016] A rear seat hot air passage (RH) for guiding the blown air having passed through the heating heat exchanger (33) to the rear seat (13) is provided on the downstream side of the heating heat exchanger (33) with respect to the flow direction of the blown air, and

[0017] The rear seat hot air passage (RH) is provided between the cooling heat exchanger (32) and the heating heat exchanger (33).

[0018] [Beneficial Effects of the Invention]

[0019] The present invention can provide a vehicle air conditioner capable of ensuring sufficient foot room for front seat passengers. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of a vehicle on which a vehicle air conditioner according to a first example is installed.

[0021] Figure 2 yes Figure 1 A perspective view of a vehicle air conditioner is shown.

[0022] Figure 3 is along Figure 2 A cross-sectional view taken along line 3-3 in FIG.

[0023] Figure 4 is a cross-sectional view of a state where a vehicle air conditioner according to a second example is viewed from the side.

[0024] Figure 5 1 is a cross-sectional view showing a state in which a vehicle air conditioner according to a third example is viewed from the side. DETAILED DESCRIPTION

[0025] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the specification, the front-rear direction refers to the front-rear direction relative to the forward direction of the vehicle on which the vehicle air conditioner is installed, and the left-right direction refers to the left-right direction relative to the vehicle occupant. In the accompanying drawings, the front direction relative to the forward direction of the vehicle is represented by Fr, the rear direction relative to the forward direction of the vehicle is represented by Rr, the left direction from the occupant is represented by Le, the right direction from the occupant is represented by Ri, the upper direction is represented by Up, and the lower direction is represented by Dn.

[0026] First example

[0027] refer to Figure 1 . Figure 1 A vehicle 10 is shown in which a vehicle air conditioner 20 (hereinafter referred to as "air conditioner 20") is installed. The vehicle 10 is, for example, a passenger car, and has a right front seat 12 and a left front seat 12 arranged at the front portion of a vehicle compartment VI; and rear seats 13 arranged behind these front seats 12, 12 at both ends in the vehicle width direction.

[0028] The air conditioner 20 is provided in front of the front seats 12, 12, and is used to blow air that has been adjusted to a predetermined temperature to the occupants in the front seats 12, 12 and the rear seat 13. The side vent switching parts 14, 14 are respectively formed in the part located in front of the front seats 12, 12 and at the right and left ends in the vehicle width direction, each of which can be switched to allow or not allow the blowing of the blowing air. The central vent switching parts 15, 15 are respectively formed in the part located in front of the front seats 12, 12 and at the central side in the vehicle width direction, each of which can be switched to allow or not allow the blowing of the blowing air.

[0029] The rear duct 16 extending toward the rear seat 13 is connected to the air conditioner 20, and air can be blown to the rear seat 13 via the rear duct 16. A rear seat blower switching portion 17 is provided at the rear end or downstream end of the rear duct 16, which can be switched to allow or not allow blowing air to be blown to the rear seat 13.

[0030] The rear duct 16 may be arranged, for example, in a manner extending rearward along the lower surface of the center console and extending upward along the rear surface of the center console. Alternatively, the rear duct 16 may extend under the floor of the vehicle interior and rise along the B-pillar. Further alternatively, the rear duct 16 may branch in the middle so that air can be blown to the upper and lower bodies of the rear seat occupants.

[0031] Each of the switching portions 14 , 15 , 17 is formed to include a shutter, and when the occupant swings the operating portions 14 a , 15 a , 17 a , respectively, the air volume can be switched from fully opened to fully closed.

[0032] refer to Figure 2 The air conditioner 20 has a blower unit 21 that can suck air inside and / or outside the vehicle compartment to blow the air, and a temperature adjustment unit 30 that can adjust the blown air delivered from the blower unit 21 to a predetermined temperature. The air blown leftward from the blower unit 21 flows backward in the temperature adjustment unit 30.

[0033] The blower unit 21 may adopt a known configuration, for example, a blower fan is installed therein.

[0034] The air conditioner 20 may also be configured such that the blower unit 21 is arranged on the left side of the temperature adjustment unit 30. This arrangement may be appropriately selected according to the right or left position of the steering wheel or the like.

[0035] refer to Figure 3 The temperature adjustment unit 30 comprises: a housing 50, a blower unit 21 (see Figure 2 ) to deliver the blown air into the housing 50; a cooling heat exchanger 32, which is arranged in the internal space of the housing 50 and can cool the blown air; a heating heat exchanger 33, which is capable of heating the air that has passed through the cooling heat exchanger 32; a front seat temperature regulator 34, which is arranged on the downstream side of the heating heat exchanger 33 to adjust the amount of the blown air that passes through the heating heat exchanger 33; a defrost opening / closing door 36, a ventilation opening / closing door 37 and a foot opening / closing door 38, which are arranged on the downstream side of the front seat temperature regulator 34 to switch the opening / closing of the openings 51 to 54 respectively; a rear seat blower member 41, which extends downward in front of the heating heat exchanger 33 to guide the air that has passed through the heating heat exchanger 33 to the rear seat 13 (see Figure 1 ); a cold air introduction portion 42, which extends along the rear portion of the rear seat blower component 41 and can introduce cold air; and a mixing portion 60, which is arranged at the lower portion of the shell 50 to mix the blowing air that has passed through the rear seat blower component 41 and the blowing air that has passed through the cold air introduction portion 42.

[0036] For example, the housing 50 is formed to include a plurality of parts. More specifically, the housing 50 is formed to include three parts, which are parts constituting the upper right and upper left parts and the lower part. An injection molded product can be used as each part. The housing 50 can be formed to include two parts, or can be formed to include four or more parts.

[0037] Also referred to Figure 1 The housing 50 is opened to have: a defroster opening 51 through which blowing air to be delivered to the front windshield passes; vents 52, 53 through each of which blowing air to be delivered to the upper body of the occupant in the front seat 12 passes; a foot opening 54 through which blowing air to be delivered to the feet of the occupant in the front seat 12 passes; and a rear opening 55 through which blowing air to be delivered to the occupant in the rear seat 13 passes.

[0038] The internal space IS has: a cold air flow path CP, through which only the blown air that has passed 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 mixed 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.

[0039] The vents 52 , 53 are: the side vents 52 through which the air blown out from the side vent switching portion 14 passes; and the center vents 53 through which the air blown out from the center vent switching portion 15 passes.

[0040] Each of the vents 52 , 53 does not always have to be formed at two locations, the center and the outer side in the vehicle width direction.

[0041] refer to Figure 3 The cooling heat exchanger 32 is disposed at the front of the housing 50 so that the blowing air passes therethrough substantially in the front-rear direction. The blowing air is cooled by exchanging heat with the heat medium passing through the cooling heat exchanger 32. For example, fluorocarbon refrigerant or carbon dioxide may be used as the heat medium.

[0042] The heating heat exchanger 33 is arranged behind the cooling heat exchanger 32 and is arranged so that the blowing air passes therethrough substantially in the up-down direction. For example, the heating heat exchanger 33 includes: a hot water heater 33a, in which hot water that has flowed and has been heated by the engine flows; and an electric heater 33b that is heated when power is turned on.

[0043] In the state shown in the figure, the blowing air having passed through the cooling heat exchanger 32 partially passes through the right and left sides of the rear seat blower member 41 and is guided below the heating heat exchanger 33 and flows upward. At this time, the blowing air is heated by the heating heat exchanger 33.

[0044] The heating heat exchanger 33 does not always have to include two components, namely the hot water heater 33a and the electric heater 33b, and may include only one of them. Alternatively, a heater using a heat medium other than hot water may be adopted as the heating heat exchanger 33. For example, a fluorocarbon refrigerant or carbon dioxide may be used as the heat medium.

[0045] The front seat temperature regulator 34 has: a front seat temperature regulator actuator not shown, which generates a rotational driving force when energized; a driving force transmission shaft, which has a pinion 34a, is coupled to the front seat temperature regulator actuator and rotates; and a door body 34b, which slides substantially in the front-rear direction when engaged with the pinion 34a to rotate the driving force transmission shaft. The door body 34b has a rack meshing with the pinion 34a.

[0046] The opening amount of the cold air flow path CP and the hot air flow path HP is adjusted by moving the door body 34b. In this way, the volume of the cold air and the hot air flowing into the mixing flow path MP is adjusted so that when the cold air and the hot air are mixed in the mixing flow path MP, the temperature of the mixed air becomes a predetermined temperature.

[0047] The front seat temperature regulator 34 may not include a sliding door, but may include a swing door rotatable about a rotation axis.

[0048] The defroster opening / closing door 36 is a swing door that can swing to adjust the opening amount of the defroster opening 51 .

[0049] The vent opening / closing door 37 is a swing door that can swing to adjust the opening amount of the vents 52 , 53 .

[0050] The foot opening / closing door 38 is a swing door that can swing to adjust the opening amount of the foot opening 54 .

[0051] The rear seat blower member 41 is a duct-shaped member extending in the up-down direction in front of the heating heat exchanger 33. The rear seat blower member 41 is formed so that its width in the left-right direction is smaller than the width in the left-right direction of the heating heat exchanger 33. In this way, the blown air having passed through the cooling heat exchanger 32 can pass through the right and left sides of the rear seat blower member 41 and flow into the heating heat exchanger 33. The upper end of the rear seat blower member 41 faces the downstream end of the heating heat exchanger 33, and the lower end of the rear seat blower member 41 faces the mixing portion 60.

[0052] The interior of the rear seat blower member 41 serves as a rear seat hot air passage RH through which the blown air heated by the heating heat exchanger 33 passes. The rear seat hot air passage RH can be described as a flow path for guiding the blown air that has passed through the heating heat exchanger 33 to the rear seat 13 (see FIG. Figure 1 ). The rear seat hot air passage RH is provided between the cooling heat exchanger 32 and the heating heat exchanger 33.

[0053] As described above, the rear seat hot air passage RH is surrounded by the cold air flow path CP. Therefore, there is a concern that the hot air flowing through the rear seat hot air passage RH is unintentionally cooled. Alternatively, there is a concern that the cold air flowing through the cold air flow path CP is unintentionally heated. In this case, for example, a heat insulating material such as polyurethane foam is bonded around the rear seat blower component 41, or the rear seat blower component 41 itself is formed of a foam resin. In this way, the heat insulating performance of the rear seat blower component 41 can be improved, and undesirable heat exchange can be prevented. Such heat insulating measures do not always have to be taken, but are appropriately selected in consideration of the temperature, cost, etc. of the harmonic air blown out from the air conditioner 20. In addition, in the case where the heat insulating material is bonded to the rear seat blower component 41, the bonding position may be the outer surface of the rear seat blower component 41, or may be its inner surface facing the rear seat hot air passage RH.

[0054] The rear seat blower member 41 may be formed integrally with the housing 50, or may be formed by a member separate from the housing 50. In addition, the entire cool air introduction portion 42 is particularly preferably located in front of the heating heat exchanger 33.

[0055] The cool air introduction portion 42 is a portion that guides the cool blown air flowing in the cool air flow path CP to the mixing portion 60. The cool air introduction portion 42 is provided behind the rear seat blower member 41 and below the heating heat exchanger 33.

[0056] For example, the cold air introduction portion 42 is formed of a duct-shaped member, the upper surface of which is open, and is formed integrally with the rear surface of the rear seat blower member 41. The upper end of the cold air introduction portion 42 serves as a cold air inlet 42a, which is opened to allow the blown air from the cold air flow path CP to enter. The cold air inlet 42a is formed to be inclined rearward and downward.

[0057] The cool air introduction portion 42 may be provided separately from the rear seat blower component 41, and may be formed of a member different from the rear seat blower component 41. The cool air intake port 42a may also be formed by the rear opening 55.

[0058] The mixing portion 60 is a member in which the hot blown air having passed through the rear seat hot air passage RH and the cold air introduced from the cold air introduction portion 42 are mixed. The mixing portion 60 is formed by a member separate from the housing 50 and is attached to the lower portion of the housing 50. In other words, it can be described that the mixing portion 60 is provided outside the housing 50 and adjacent thereto.

[0059] Furthermore, a portion of the mixing section 60 is located in front of the heating heat exchanger 33, and the remaining portion thereof is located below the heating heat exchanger 33. The mixing section 60 is preferably provided in front of at least the rear end of the heating heat exchanger 33. The entire mixing section 60 is most preferably provided in front of the heating heat exchanger 33. The reason for this will be described below.

[0060] The mixing section 60 has a mixing section housing 61 which is closely attached to the lower surface of the housing 50 , and a rear seat temperature regulator 70 which is provided in the mixing section housing 61 to regulate the temperature of the blown air.

[0061] The rear seat temperature regulator 70 has: a rear seat temperature regulator actuator 71, which is provided outside the mixing portion housing 61 and generates a rotational driving force when powered; and a rear seat temperature regulator door 72, which is provided in the mixing portion housing 61 and swings when the rear seat temperature regulator actuator 71 is actuated to adjust the mixing ratio between hot air and cold air. For example, a stepping motor can be used as the rear seat temperature regulator actuator 71.

[0062] The rear duct 16 is connected to the lower portion of the mixing section 60. The rear duct 16 extends downward from the lower end of the mixing section 60, and extends rearward along the floor surface.

[0063] Second example

[0064] Next, an air conditioner 20A according to a second example will be described with reference to the drawings.

[0065] Figure 4 A temperature adjustment unit 30A used in an air conditioner 20A according to a second example is shown. The same components as those of the first example will be denoted by the same reference numerals and will not be described in detail.

[0066] A cool air intake port 41Aa for sucking the blown air passing through the cool air flow path CP is formed on the rear surface (side surface of the rear seat hot air passage RH) of the rear seat blower component 41A. The inner portion of the rear seat blower component 41A from the heating heat exchanger 33 to the portion where the cool air intake port 41Aa is formed serves as the rear seat hot air passage RH through which the blown air heated by the heating heat exchanger 33 passes. A rear seat temperature adjuster 70A for adjusting the temperature of the blown air is provided in the portion where the cool air intake port 41Aa of the rear seat blower component 41A is formed.

[0067] The rear seat temperature regulator 70A includes a rear seat temperature regulator actuator 71 disposed outside the rear seat blower member 41A and a rear seat temperature regulator door 72A that swings when the rear seat temperature regulator actuator 71 is actuated. The rear seat temperature regulator door 72A can swing inside the rear seat blower member 41A.

[0068] An inner portion of the rear seat blower member 41A on the downstream side of the rear seat hot air passage RH serves as a rear seat mixing flow path RM in which the blown air having flowed through the rear seat hot air passage RH and the blown air having been sucked from the cool air intake port 41Aa are mixed.

[0069] The rear seat temperature adjustment door 72A is set to be able to swing from a position where the rear seat hot air passage RH is fully closed to a position where the cold air intake port 41Aa is fully closed. Figure 1 ) is adjusted by the position of the rear seat temperature adjustment door 72A.

[0070] Here, the entire rear-seat temperature adjustment door 72A and the entire rear-seat blower member 41A (the entire rear-seat mixing flow path RM) are particularly preferably located in front of the heating heat exchanger 33 .

[0071] Third Example

[0072] Next, an air conditioner 20B according to a third example will be described with reference to the drawings.

[0073] Figure 5A temperature adjustment unit 30B used in an air conditioner 20B according to a third example is shown. Common components of the first example and / or the second example will be denoted by the same reference numerals and will not be described in detail.

[0074] A cool air intake port 41Ba for sucking the blown air passing through the cool air flow path CP is formed on the lower surface of the front portion of the rear seat blower component 41B (the side surface of the rear seat hot air passage RH). The inner portion of the rear seat blower component 41B from the heating heat exchanger 33 to the portion where the cool air intake port 41Ba is formed serves as the rear seat hot air passage RH through which the blown air heated by the heating heat exchanger 33 passes. A rear seat temperature adjuster 70A for adjusting the temperature of the blown air is provided in the portion where the cool air intake port 41Ba of the rear seat blower component 41B is formed.

[0075] The rear seat temperature regulator 70A includes a rear seat temperature regulator actuator 71 disposed outside the rear seat blower member 41 and a rear seat temperature regulator door 72A that swings when the rear seat temperature regulator actuator 71 is actuated. The rear seat temperature regulator door 72A can swing inside the rear seat blower member 41B.

[0076] An inner portion of the rear seat blower member 41 on the downstream side of the rear seat hot air passage RH serves as a rear seat mixing flow path RM in which the blown air having flowed through the rear seat hot air passage RH and the blown air having been sucked from the cold air intake port 41Ba are mixed.

[0077] The rear seat temperature adjustment door 72A is configured to be swingable from a position where the rear seat hot air passage RH is fully closed to a position where the cold air intake port 41Ba is fully closed. Figure 1 ) is adjusted by the position of the rear seat temperature adjustment door 72A.

[0078] Other Examples

[0079] It has been described so far that the heating heat exchanger 33 is arranged so that the blowing air passes through it substantially in the up-down direction. However, the embodiments of the present invention are not limited to this. For example, the heating heat exchanger 33 can be arranged vertically (arranged to extend in the up-down direction), and can be arranged so that the blowing air passes through it substantially in the front-back direction. At this time, it can be configured that the rear seat blower component 41 is opened behind the heating heat exchanger 33 (i.e., the hot air flow path HP, through which the hot air that has flowed out of the heating heat exchanger 33 flows), and is arranged between the cooling heat exchanger 32 and the heating heat exchanger 33 through the upper surface of the heating heat exchanger 33.

[0080] The present invention will be summarized as follows.

[0081] refer to Figure 1 and Figures 3 to 5 . As a first case, the air conditioners 20, 20A, 20B can each blow air toward the front seat 12 on which the vehicle occupant can sit and the rear seat 13 arranged behind the front seat 12. In addition, in each of the air conditioners 20, 20A, 20B, 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 the internal space IS of the housing 50. The heating heat exchanger 33 is provided behind the cooling heat exchanger 32 with respect to the forward direction of the vehicle. The internal space IS is formed with: 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 mixed 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. A rear seat hot air passage RH for guiding the blown air having passed through the heating heat exchanger 33 to the rear seat 13 is provided on the downstream side of the heating heat exchanger 33 with reference to the flow direction of the blown air and between the cooling heat exchanger 32 and the heating heat exchanger 33 .

[0082] refer to Figures 3 to 5 The rear seat hot air passage RH is provided between the cooling heat exchanger 32 and the heating heat exchanger 33. In this way, the rear duct 16 can be connected by avoiding the lower rear portion of the housing 50 (see Figure 1 ) etc. Therefore, it is possible to ensure sufficient foot room for the occupant in the front seat 12.

[0083] refer to Figure 3 As a second case, in the air conditioner 20 of the first case, a mixing portion 60 for mixing the blown air having passed through the rear seat hot air passage RH and the blown air having passed through the cold air flow path CP is provided outside the housing 50 and adjacent to the outside of the housing 50. The mixing portion 60 is provided with a rear seat temperature regulator 70 capable of adjusting a ratio of the blown air from the rear seat hot air passage RH and a ratio of the blown air from the cold air flow path CP.

[0084] The mixing portion 60 accommodating the rear seat temperature regulator 70 is provided outside the housing 50 and adjacent to the outside of the housing 50. In the case where the air conditioner 20 is used as the air conditioner 20 that can adjust the temperature of only the front seat 12, by closing the opening (rear opening 55) in the housing 50 where the mixing portion 60 is provided, the air conditioner 20 can be used for the front seat 12. This configuration is preferable in terms of improving the versatility of components.

[0085] As a third case, in the air conditioner 20 of the second case, the mixing portion 60 is disposed at the front side relative to the vehicle forward direction, compared to the rear end of the heating heat exchanger 33. By disposing the mixing portion 60 in front of the rear end of the heating heat exchanger 33, the foot space of the occupant in the front seat 12 can be further reliably ensured.

[0086] refer to Figure 4 and Figure 5 As a fourth case, the air conditioner 20A of the first case 20B includes: cold air intake ports 41Aa, 41Ba, each of which is formed on a side surface of the rear seat hot air passage RH with respect to the flow direction of the blowing air flowing through the rear seat hot air passage RH, and each of which is opened to allow the blowing air from the cold air flow path CP to enter; a rear seat mixing flow path RM, which is formed on the downstream side of the rear seat hot air passage RH, and in which the blowing air that has flowed through the rear seat hot air passage RH and the blowing air that has been sucked from the cold air intake ports 41Aa, 41Ba are mixed; and a rear seat temperature regulator 70A, which is capable of opening / closing the rear seat hot air passage RH and the cold air intake ports 41Aa, 41Ba, and is capable of adjusting the ratio of the blowing air that has passed through the rear seat hot air passage RH and the ratio of the blowing air that has been sucked from the cold air intake ports 41Aa, 41Ba. The rear seat temperature regulator 70A includes: a rear seat temperature regulation actuator 71 as a driving source; and a rear seat temperature regulation door 72A which is provided in a boundary portion between the rear seat hot air passage RH and the rear seat mixing flow path RM and is driven by the rear seat temperature regulation actuator 71. At least the rear seat temperature regulation door 72A is provided in the housing 50.

[0087] Since the rear seat temperature adjustment door 72A is provided in the housing 50 , it is possible to reduce the size of the air conditioners 20A, 20B, and further reliably ensure the foot room for the occupant in the front seat 12 .

[0088] As a fifth case, in the air conditioner 20A, 20B of the fourth case, the rear seat temperature adjustment door 72A and the rear seat mixing flow path RM are provided in front of the rear end of the heating heat exchanger 33 with respect to the vehicle forward direction. By providing the rear seat temperature adjustment door 72A and the rear seat mixing flow path RM in front of the rear end of the heating heat exchanger 33, the foot room of the occupant in the front seat 12 can be further reliably ensured.

[0089] As a sixth aspect, in the air conditioner 20, 20A, 20B of any one of the first to fifth aspects, the heating heat exchanger 33 is arranged so that the blown air passes therethrough substantially in the up-down direction. By arranging the heating heat exchanger 33 substantially horizontally, the vertical dimension of the rear portion of each air conditioner 20, 20A, 20B can be reduced, and the foot space of the occupant in the front seat 12 can be further reliably ensured.

[0090] The present invention is not limited to these examples as long as the operational effects of the present invention can be exerted.

[0091] [Industrial Applicability]

[0092] The air conditioner of the present invention is suitable for being installed in a passenger car.

[0093] Reference numerals list

[0094] 12: Front seat

[0095] 13: Backseat

[0096] 20, 20A, 20B: Vehicle air conditioning

[0097] 32: Cooling heat exchanger

[0098] 33: Heating heat exchanger

[0099] 42a, 41Aa, 41Ba: Cold air intake

[0100] 50: Shell

[0101] 60: Mixed part

[0102] 70, 70A: Rear seat temperature regulator

[0103] 71: Rear seat temperature control actuator

[0104] 72, 72A: Rear seat temperature control door

[0105] IS: Interior Space

[0106] CP: Cold Air Flow Path

[0107] HP: Hot air flow path

[0108] MP: Mixed Flow Path

[0109] RH: Rear seat hot air duct

[0110] RM: Rear Mixing Flow Path

Claims

1. A vehicle air conditioner capable of blowing air toward a front seat (12) on which a vehicle occupant can sit and a rear seat (13) arranged 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 having passed through the cooling heat exchanger (32) are provided in the internal space (IS) of the housing (50). The heating heat exchanger (33) is arranged behind the cooling heat exchanger (32) relative to the vehicle's forward direction, and The internal space (IS) is formed with: a cold air flow path (CP) through which the blowing air that has passed through the cooling heat exchanger (32) flows; a hot air flow path (HP) through which the blowing air that has passed through the heating heat exchanger (33) flows; and a mixed flow path (MP) in which the blowing air that has passed through the cold air flow path (CP) and the blowing air that has passed through the hot air flow path (HP) are mixed. in, A rear seat hot air passage (RH) for guiding the blown air having passed through the heating heat exchanger (33) to the rear seat (13) is provided on the downstream side of the heating heat exchanger (33) with respect to the flow direction of the blown air, and The rear seat hot air passage (RH) is provided between the cooling heat exchanger (32) and the heating heat exchanger (33).

2. The vehicle air conditioner according to claim 1, in, A mixing portion (60) is provided outside the housing (50) and adjacent to the outside of the housing (50), the mixing portion being used to mix the blown air having passed through the rear seat hot air passage (RH) and the blown air having passed through the cold air flow path (CP), and The mixing portion (60) is provided with a rear seat temperature regulator (70) capable of adjusting the ratio of the blown air from the rear seat hot air passage (RH) and the ratio of the blown air from the cold air flow path (CP).

3. The vehicle air conditioner according to claim 2, in, The mixing portion (60) is disposed in front of a rear end of the heating heat exchanger (33) relative to the vehicle's advancing direction.

4. The vehicle air conditioner according to claim 1, further comprising: include: a cold air intake port (41Aa; 41Ba) formed on a side surface of the rear seat hot air passage (RH) with respect to a flow direction of the blowing air flowing through the rear seat hot air passage (RH) and opened to allow the blowing air to be sucked in from the cold air flow path (CP); a rear seat mixing flow path (RM) which is formed on the downstream side of the rear seat hot air passage (RH) and in which the blown air having flowed through the rear seat hot air passage (RH) and the blown air having been sucked from the cold air intake port (41Aa; 41Ba) are mixed; as well as A rear seat temperature regulator (70A) capable of opening / closing a rear seat hot air passage (RH) and a cold air intake port (41Aa; 41B) and capable of adjusting a ratio of blown air passing through the rear seat hot air passage (RH) and a ratio of blown air having been sucked from the cold air intake port (41Aa; 41Ba), wherein The rear seat temperature regulator (70A) has: a rear seat temperature regulation actuator (71) as a driving source; and a rear seat temperature regulation door (72A) which is provided in a boundary portion between a rear seat hot air passage (RH) and a rear seat mixed flow path (RM) and is driven by the rear seat temperature regulation actuator (71), and At least a rear seat temperature adjustment door (72A) is disposed within the housing (50).

5. The vehicle air conditioner according to claim 4, in, The rear seat temperature adjustment door (72A) and the rear seat mixing flow path (RM) are arranged in front of the rear end of the heating heat exchanger (33) with respect to the vehicle forward direction.

6. The vehicle air conditioner according to any one of claims 1 to 5, in, The heating heat exchanger (33) is arranged so that the blowing air passes therethrough substantially in the up-down direction.

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