Vehicle air conditioning device and automobile air conditioning system

Abstract

This invention discloses a vehicle air conditioning device, comprising: an air conditioning housing; an evaporator; a heater; and a damper for regulating air temperature. The evaporator and heater are sequentially housed within the air conditioning housing in the airflow direction. The damper is disposed between the evaporator and the heater. A cold air passage bypassing the heater and a hot air passage passing through the heater are formed within the air conditioning housing. The damper is selectively rotatable between a first limit position and a second limit position, thereby allowing air to selectively flow through either the cold air passage or the hot air passage. The damper has a door panel portion and a rotating shaft portion. A blocking member is provided on the rotating shaft portion to prevent condensate dripping from the evaporator from being introduced into the heater. This invention also discloses an automotive air conditioning system including this vehicle air conditioning device.

Description

Technical Field

[0001] This invention relates to an air conditioning unit for a vehicle. It also relates to an automotive air conditioning system including the aforementioned air conditioning unit. Background Technology

[0002] This section provides background information relevant to this application, which does not necessarily constitute prior art.

[0003] Vehicles are typically equipped with an air conditioning system. This system regulates the temperature and humidity inside the passenger compartment by supplying cool or warm air, or a mixture of both, to the passenger compartment.

[0004] On the one hand, vehicle air conditioning systems utilize refrigerant (such as R-134a, R-1234yf, etc.) circulating in a refrigeration cycle loop to absorb heat from the air inside the vehicle and expel it into the outside air, thus lowering the temperature of the air inside the vehicle. The refrigeration cycle loop typically consists of an evaporator, compressor, condenser, expansion valve, receiver-drier, air conditioning ducts, and condenser fan.

[0005] In a refrigeration cycle, refrigerant typically undergoes the following process: The compressor draws in low-temperature, low-pressure gaseous refrigerant from the evaporator outlet, compresses it into high-temperature, high-pressure gaseous refrigerant, and discharges it from the compressor; the high-temperature, high-pressure superheated gaseous refrigerant enters the condenser, where the pressure and temperature decrease, causing the gaseous refrigerant to condense into a liquid and release a large amount of heat; the high-temperature, high-pressure liquid refrigerant passes through the expansion device, its volume increases, and its pressure and temperature drop sharply, causing the mist-like liquid refrigerant (fine droplets) to exit the expansion device; the mist-like liquid refrigerant enters the evaporator, where, because the boiling point of the refrigerant is much lower than the temperature inside the evaporator, the liquid refrigerant evaporates into a gaseous state.

[0006] On the other hand, the vehicle air conditioning unit includes an air conditioning housing and a blower housed within the air conditioning housing, wherein the blower blows air into the air conditioning housing. The interior of the air conditioning housing also houses the aforementioned evaporator for performing a cooling function and a heater for performing a heating function.

[0007] The air conditioning housing also includes a mode damper for switching airflow modes and a temperature damper for regulating air temperature. The temperature damper allows air cooled by the evaporator to selectively bypass or pass through the heater, or allows some air to bypass the heater while others pass through it, and then blows the mixed air at the appropriate temperature into the passenger compartment through the corresponding air passage in the air conditioning housing.

[0008] During the operation of a vehicle's air conditioning system, condensation is generated on the evaporator. To prevent water accumulation inside the air conditioning housing, a drain outlet is usually installed at the bottom of the housing to drain the condensation. A small amount of condensation on the evaporator may be carried away by airflow as tiny droplets or mist, travel a distance, accumulate on the temperature damper, and then flow down with gravity.

[0009] Existing air dampers have a door panel portion and a rotating shaft portion. A groove is formed within the air conditioning housing to accommodate the rotating shaft portion. The rotating shaft portion of the damper rotates within this groove and is supported at both ends via structures such as support members (e.g., bearings) through holes on the air conditioning housing. In some vehicle air conditioning systems, the evaporator is tilted towards the heater. When the temperature damper is in a certain extreme or intermediate position, the rotating shaft portion of the temperature damper is closer to the evaporator than the distal end of the temperature damper, and condensate dripping from the evaporator may be introduced into the downstream heater. Furthermore, during the operation of the vehicle air conditioning system, the airflow cooled by the evaporator carries some small water droplets, which accumulate on the door panel portion of the temperature damper, forming condensate. When the door panel is rotated above the rotating shaft position, the condensate may flow into the groove in the air conditioning housing. The condensate accumulated in the groove may leak into the passenger compartment through the support member through holes supporting the rotating shaft portion of the damper. This may be considered a vehicle quality problem during vehicle use. Summary of the Invention

[0010] To address these existing problems, the present invention aims to provide a vehicle air conditioning unit that can prevent condensate dripping from the evaporator from being introduced into the heater and also prevent condensate from leaking into the passenger compartment. This unit can guide the condensate to the drain outlet of the air conditioning housing and avoid complex structural designs.

[0011] According to one aspect of the present invention, an air conditioning device for a vehicle is provided, comprising: an air conditioning housing; an evaporator; a heater; and a damper for regulating air temperature, wherein the evaporator and the heater are sequentially housed within the air conditioning housing in the airflow direction, the damper is disposed between the evaporator and the heater, a cold air passage bypassing the heater and a hot air passage passing through the heater are formed within the air conditioning housing, the damper is selectively rotatable between a first limit position and a second limit position, thereby allowing air to selectively flow through the cold air passage or the hot air passage, the damper having a door panel portion and a rotating shaft portion, and a blocking member provided on the rotating shaft portion for preventing condensate dripping from the evaporator from being introduced into the heater.

[0012] According to one aspect of the invention, the blocking members are a first skirt and a second skirt extending radially outward from the rotating shaft portion, and an airflow sealing rib that mates with the first skirt and the second skirt is provided inside the air conditioning housing.

[0013] According to one aspect of the invention, both the first skirt and the second skirt extend along the axial direction of the rotation axis portion. At a first extreme position, the first skirt of the damper abuts against the airflow sealing rib and forms a seal; at a second extreme position, the second skirt of the damper abuts against the airflow sealing rib and forms a seal. This seal isolates cold air from hot air within the air conditioning housing, ensuring maximum thermal efficiency output.

[0014] According to one aspect of the invention, the damper can be positioned between a first extreme position and a second extreme position, thereby allowing a portion of air to flow through a cold air passage and another portion of air to flow through a hot air passage, whereby the two portions of air are mixed. This enables a gradual adjustment of the air conditioner's outlet temperature for both cooling and heating.

[0015] According to one aspect of the invention, the damper is integrally injection molded from a rigid engineering plastic and a thermoplastic elastomer material.

[0016] According to one aspect of the invention, the door panel portion is generally rectangular flat, the rotating shaft portion is integrally formed on one long side of the door panel portion, and a plurality of reinforcing ribs are integrally provided between the door panel portion and the rotating shaft portion.

[0017] According to one aspect of the invention, the first and second skirts are made of thermoplastic elastomer material and are molded together with the rotation axis portion.

[0018] According to one aspect of the invention, an airflow sealing rib extends upward from the upper surface of a partition in the air conditioner housing, and the upper surface of the partition is flat or convex.

[0019] According to one aspect of the present invention, a hot air passage sealing rib and a cold air passage sealing rib are formed on the inner wall near the air outlet of the air conditioner housing, which respectively cooperate with the damper at the first limit position and the second limit position.

[0020] According to one aspect of the invention, a sealing edge 54 is formed on the side of the door panel portion of the damper, and the sealing edge cooperates with the hot air passage sealing rib and the cold air passage sealing rib to form a cold air passage and a hot air passage, respectively.

[0021] According to one aspect of the invention, a rotary output shaft 55 is formed at both ends of the rotary shaft portion. The rotary output shaft extends through the support through hole in the air conditioner housing. A bushing that surrounds the rotary shaft portion and opens outward from the rotary shaft portion in a trumpet shape is formed at the portion of the rotary shaft portion near the rotary output shaft. The bushing abuts against the air conditioner housing and covers the support through hole.

[0022] According to one aspect of the invention, the evaporator is tilted toward the heater.

[0023] According to one aspect of the invention, the air conditioner housing includes a drainage system, the drainage system including a first drain outlet and a second drain outlet, the first drain outlet being disposed downstream of the evaporator, and the second drain outlet being connected to the first drain outlet for discharging condensate guided by a blocking member.

[0024] According to one aspect of the invention, when the damper is in the first extreme position or the intermediate position, the rotating shaft portion is closer to the evaporator than the far end of the damper.

[0025] According to one aspect of the present invention, an automotive air conditioning system is also provided, comprising a vehicle air conditioning device as described in any of the preceding claims.

[0026] The vehicle air conditioning unit according to the present invention can prevent condensate from accumulating near the air damper and seeping to the outside of the air conditioning unit, but instead guides the condensate to the drain outlet of the air conditioning housing, and avoids complex structural design. Attached Figure Description

[0027] The foregoing and other features and characteristics of this application will become clearer from the following detailed description with reference to the accompanying drawings, which are merely illustrative and not necessarily drawn to scale. The same reference numerals are used in the drawings to indicate the same parts, in which:

[0028] Figure 1 This is a perspective view showing a vehicle air conditioning unit according to the present invention.

[0029] Figure 2 This is a cross-sectional view showing a vehicle air conditioning unit according to the present invention.

[0030] Figure 3 This is a partial cross-sectional view showing the temperature damper of the vehicle air conditioning device according to the present invention in the first extreme position.

[0031] Figure 4 This is a partial cross-sectional view showing the temperature damper of the vehicle air conditioning device according to the present invention in the second extreme position.

[0032] Figure 5 This is a partial cross-sectional view showing the temperature damper of the vehicle air conditioning device according to the present invention in the middle position.

[0033] Figure 6 This is a perspective view showing the temperature damper of a vehicle air conditioning unit according to the present invention.

[0034] Figure 7 This is a partial perspective view showing the temperature damper of the vehicle air conditioning device according to the present invention. Detailed Implementation

[0035] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, so that those skilled in the art can readily implement the present invention. However, the present invention can be implemented in various different ways and is therefore not limited to the embodiments described in this specification.

[0036] For ease of illustration, the dimensions and thicknesses of each component shown in the accompanying drawings are shown arbitrarily. Therefore, the invention is not limited to the components shown in the drawings, and the thicknesses are shown in magnification to clearly illustrate each part and area.

[0037] In addition, in the detailed description below, the names of the parts are divided into first, second, etc. to distinguish the same components, and are not limited to the order in the following description.

[0038] Throughout the specification, unless otherwise stated, when a part is described as including a component, it indicates that other components may also be included, rather than excluding other components.

[0039] In addition, the terms "unit," "device," "component," and "section" used in the specification refer to the overall structural unit that performs at least one function or operation.

[0040] Figure 1 This is a perspective view showing a vehicle air conditioning unit 1 according to the present invention.

[0041] Figure 2 This is a cross-sectional view showing a vehicle air conditioning unit 1 according to the present invention.

[0042] like Figure 1 and Figure 2 As shown, the vehicle air conditioning unit 1 includes a blower 20, an evaporator 30, and a heater 40, which are sequentially housed within an air conditioning housing 10 in the direction of airflow. The evaporator 30 is inclined toward the heater 40. A cold air passage 12 bypassing the heater 40 and a hot air passage 14 passing through the heater 40 are formed within the air conditioning housing 10.

[0043] The evaporator 30 is connected to the refrigeration cycle loop (not shown) of the automotive air conditioning system to absorb heat through the evaporation of refrigerant, i.e., to cool the air flowing around the evaporator 30. The heater 40 is connected to the heating loop of the automotive air conditioning system, for example, to the coolant loop of the automotive engine, to obtain heat from the coolant in the engine to heat the flowing air. A temperature damper 50 for regulating the air temperature is provided between the evaporator 30 and the heater 40. The temperature damper 50 can selectively rotate between a first extreme position and a second extreme position, or be in an intermediate position between the first extreme position and the second extreme position. Using the temperature damper 50, air blown into the air conditioning housing 10 by the blower 20 can selectively flow through the cold air passage 12 or the hot air passage 14, or a portion of the air can flow through the cold air passage 12 and another portion through the hot air passage 14, and then the two portions of air can be mixed.

[0044] Figure 3 , Figure 4 and Figure 5 These are cross-sectional views of an air conditioning unit with the damper in its first extreme position (also known as the maximum cold air position), second extreme position (also known as the maximum hot air position), and intermediate position. As shown, a hot air passage sealing rib 17 and a cold air passage sealing rib 13 are formed on the inner wall near the air outlet 16 of the air conditioning housing 10. These ribs cooperate with the temperature dampers 50 in their first and second extreme positions, respectively, to switch the outlet air temperature. Additionally, a partition 19 is formed on the air conditioning housing 10 opposite to the air outlet 16 to separate the cold air passage 12 and the hot air passage 14. The partition 19 is located below the temperature damper 50 and has an airflow sealing rib 15 protruding upward from its upper surface. As detailed below, the airflow sealing rib 15 is used to press and seal against the skirt of the temperature damper 50 to form a complete hot air passage 14 or cold air passage 12. Furthermore, the upper surface of the partition 19 with the airflow sealing rib 15 is either flat or convex to prevent condensation buildup.

[0045] Figure 6This is a perspective view showing the temperature damper 50 of a vehicle air conditioning unit 1 according to the present invention. Preferably, the temperature damper 50 is integrally injection molded from a rigid engineering plastic and a thermoplastic elastomer. The temperature damper 50 has a door panel portion 51 and a rotating shaft portion 52. As shown, the door panel portion 51 is generally rectangular flat. However, those skilled in the art will understand that the shape of the door panel portion 51 is not limited to this, but only needs to be able to fit with the internal cavity of the air conditioning housing 10 to seal the air passage. The rotating shaft portion 52 is integrally formed on one long side of the rectangular flat door panel portion 51. A plurality of reinforcing ribs 53 are integrally provided between the door panel portion 51 and the rotating shaft portion 52. The door panel portion 51, the rotating shaft portion 52, and the reinforcing ribs 53 are made of rigid engineering plastic. Sealing edges 54 are formed on the other three sides of the door panel portion 51. The sealing edges 54 fit with the inner wall of the air conditioning housing 10 to seal the air passage. The sealing edge 54 is made of thermoplastic elastomer material and is injection molded together with the door panel portion 51.

[0046] Figure 7 This is a partial perspective view showing the temperature damper 50 of a vehicle air conditioning device 1 according to the present invention. Rotary output shafts 55 are formed at both ends of a rotating shaft portion 52. The rotating output shafts 55 extend through support holes in the air conditioning housing 10. A first skirt 56 and a second skirt 57 are provided on the rotating shaft portion 52, extending radially outward from the rotating shaft portion 52. Both the first skirt 56 and the second skirt 57 extend between the rotating output shafts 55 along the axial direction of the rotating shaft portion 52. The first skirt 56 and the second skirt 57 are made of thermoplastic elastomer material and are molded together with the rotating shaft portion 52. Those skilled in the art will understand that the first skirt 56 and the second skirt 57 can also be fixed to the rotating shaft portion 52 by other means. As shown, a drive surface 58 is provided on the rotating output shaft 55, thereby enabling the rotation of the temperature damper 50 to be driven by a drive member (not shown). The portion of the rotating shaft portion 52 near the rotating output shaft 55 is provided with a flared bushing 59 that surrounds the rotating shaft portion 52 and flares outward from the rotating shaft portion 52. The bushing 59 abuts against the housing 10 and covers the support through-hole, thereby additionally preventing condensate from seeping out along the support through-hole. When the temperature damper 50 is in the first extreme position, the second extreme position, or an intermediate position between the first extreme position and the second extreme position, one of the first skirt 56 and the second skirt 57 acts as a blocking member to prevent condensate dripping from the evaporator 30 from being introduced into the heater 40.

[0047] Return to Figure 3 , Figure 3 This is a partial cross-sectional view showing the temperature damper of the vehicle air conditioning unit according to the present invention in its first extreme position. Figure 3In the diagram, hollow arrows schematically illustrate the flow of air cooled by the evaporator 30. For example... Figure 3 As shown, the sealing edge 54 of the temperature damper 50 abuts against the cold air passage sealing rib 13 formed on the inner wall of the air conditioning housing 10 to form a seal, while the first skirt 56 of the temperature damper 50 abuts against the airflow sealing rib 15 formed on the inner wall of the air conditioning housing 10 to form a seal. Therefore, the cooled air, after encountering the temperature damper 50, mainly exits from the air outlet 16 via the cold air passage 12. Figure 3 The solid arrows schematically illustrate the flow of condensate formed on the temperature damper 50 after the cooled air, carrying tiny water droplets, encounters it. The condensate flows downwards along the temperature damper 50, over the inner wall of the air conditioner housing 10, and finally to the drainage system 60 located at the bottom of the air conditioner housing 10. The drainage system 60 includes a first drain outlet 62 and a second drain outlet 64. The first drain outlet 62 is located downstream of the evaporator 30. The second drain outlet 64 is connected to the first drain outlet 62 to drain the condensate guided by one of the first skirt 56 and the second skirt 57, which act as a blocking member. As shown, the condensate is discharged from the air conditioner housing 10 via the second drain outlet 64. Thus, condensate does not accumulate at the rotating shaft portion 52 of the temperature damper 50, and therefore, no condensate seeps out of the air conditioner housing 10 through the support holes supporting the temperature damper 50. Specifically, as... Figure 3 As shown, when the damper 50 is in the first extreme position, the rotating shaft portion 52 is closer to the evaporator 30 than the far end of the damper 50.

[0048] Figure 4 This is a partial cross-sectional view showing the temperature damper of the vehicle air conditioning unit according to the present invention in its second extreme position. Figure 4 In the diagram, hollow arrows schematically illustrate the flow of air cooled by the evaporator 30. For example... Figure 4 As shown, the sealing edge 54 of the temperature damper 50 abuts against the hot air passage sealing rib 17 formed on the inner wall of the air conditioning housing 10 to form a seal, while the second skirt 57 of the temperature damper 50 abuts against the airflow sealing rib 15 formed on the inner wall of the air conditioning housing 10 to form a seal. Thus, after encountering the temperature damper 50, the cooled air first enters the hot air passage 14, and is then heated by the heater 40. The heated air then exits from the air outlet 16. Figure 4The solid arrows schematically illustrate the flow of condensate formed on the temperature damper 50 after the cooled air encounters it. The condensate flows downward along the temperature damper 50, over the inner wall of the air conditioning housing 10, and finally to the drain port 64 located at the bottom of the air conditioning housing 10, from where it is discharged. Therefore, condensate does not accumulate at the rotating shaft portion 52 of the temperature damper 50, and thus no condensate seeps out of the air conditioning housing 10 through the support holes supporting the temperature damper 50.

[0049] Figure 5 This is a partial cross-sectional view showing the temperature damper of the vehicle air conditioning unit according to the present invention in the middle position. Figure 5 In the diagram, hollow arrows schematically illustrate the flow of air cooled by the evaporator 30. For example... Figure 5 As shown, the sealing edge 54 of the temperature damper 50 does not abut against either the cold air passage sealing rib 13 formed on the inner wall of the air conditioning housing 10, nor against the hot air passage sealing rib 17 formed on the inner wall of the air conditioning housing 10. Simultaneously, the airflow sealing rib 15 formed on the inner wall of the air conditioning housing 10 is located between the first skirt 56 and the second skirt 57 of the temperature damper 50 and does not form a seal. Therefore, the cooled air, partly encountering the temperature damper 50 and partly entering the hot air passage 14, is heated by the heater 40. The heated air mixes with the cold air at the end of the temperature damper 50 and finally exits from the air outlet 16. Figure 5 The solid arrows schematically illustrate the flow of condensate formed on the temperature damper 50 after the cooled air encounters it. The condensate flows downwards along the temperature damper 50, over the inner wall of the air conditioning housing 10, and finally to the drain port 64 located at the bottom of the air conditioning housing 10, from where it is discharged. Therefore, condensate does not accumulate at the rotating shaft portion 52 of the temperature damper 50, and thus no condensate seeps out of the air conditioning housing 10 through the support holes supporting the temperature damper 50. Specifically, as... Figure 5 As shown, when the damper 50 is in the middle position, the rotating shaft portion 52 is closer to the evaporator 30 than the far end of the damper 50.

[0050] By using the design of the first skirt 56 and the second skirt 57 of the temperature damper 50 of the present invention to cooperate with the airflow sealing rib 15 formed on the inner wall of the air conditioner housing 10, and further since the airflow sealing rib 15 protrudes from the inner wall surface, and the partition where the airflow sealing rib is formed is flat or convex and there is no groove, the sealing performance of the temperature damper 50 at the extreme position is ensured, while ensuring that no condensate water is generated and the condensate water is guided to flow and drip to the drain port at the bottom of the air conditioner housing.

[0051] The above-described design of the present invention also avoids the need to provide additional drainage holes or outlets at the sealing ribs, thus simplifying the structural design.

[0052] The present invention has been described above with reference to specific embodiments. It is understood that the above description is exemplary only and not restrictive, and various modifications and variations will arise in those skilled in the art without departing from the scope of the invention. These modifications and variations are also included within the scope of protection of this application.

Claims

1. A vehicle air conditioning unit (1), comprising: Air conditioner housing (10); Evaporator (30); Heater (40); as well as Damper (50) used for regulating air temperature. The evaporator (30) and the heater (40) are sequentially housed within the air conditioning housing (10) in the airflow direction. A damper (50) is disposed between the evaporator (30) and the heater (40). A cold air passage (12) bypassing the heater (40) and a hot air passage (14) passing through the heater (40) are formed within the air conditioning housing (10). The damper (50) is selectively rotatable between a first limit position and a second limit position, thereby allowing air to selectively flow through the cold air passage (12) or the hot air passage (14). The damper (50) has a door panel portion (51) and a rotating shaft portion (52). The rotating shaft portion (52) is characterized by a blocking member provided on it to prevent condensate dripping from the evaporator (30) from being introduced into the heater (40). The blocking member is a first skirt (56) and a second skirt (57) that extend radially outward from the rotating shaft portion (52), and an airflow sealing rib (15) that cooperates with the first skirt (56) and the second skirt (57) is provided inside the air conditioning housing (10).

2. The vehicle air conditioning unit according to claim 1, wherein, Both the first skirt (56) and the second skirt (57) extend along the axial direction of the rotating shaft portion (52). At the first extreme position, the first skirt (56) of the damper (50) abuts against the airflow sealing rib (15) and forms a seal. At the second extreme position, the second skirt (57) of the damper (50) abuts against the airflow sealing rib (15) and forms a seal.

3. The vehicle air conditioning unit according to claim 1, wherein, The damper (50) can be positioned between the first extreme position and the second extreme position, so that a portion of the air flows through the cold air channel (12) and another portion of the air flows through the hot air channel (14), and then the two portions of air are mixed.

4. The vehicle air conditioning unit according to claim 1, wherein, The damper (50) is integrally injection molded from rigid engineering plastic and thermoplastic elastomer material.

5. The vehicle air conditioning unit according to claim 1, wherein, The door panel portion (51) is generally rectangular flat, and the rotating shaft portion (52) is integrally formed on one long side of the door panel portion (51). Multiple reinforcing ribs (53) are integrally provided between the door panel portion (51) and the rotating shaft portion (52).

6. The vehicle air conditioning unit according to claim 1, wherein, The first skirt (56) and the second skirt (57) are made of thermoplastic elastomer material and are molded together with the rotating shaft portion (52).

7. The vehicle air conditioning unit according to claim 1, wherein, The airflow sealing rib (15) extends upward from the upper surface of the partition (19) in the air conditioner housing (10), and the upper surface of the partition (19) is flat or convex.

8. The vehicle air conditioning unit according to claim 1, wherein, Hot air passage sealing ribs (17) and cold air passage sealing ribs (13) are formed on the inner wall near the air outlet (16) of the air conditioner housing (10), respectively cooperating with the dampers (50) in the first extreme position and the second extreme position.

9. The vehicle air conditioning unit according to claim 8, wherein, A sealing edge (54) is formed on the side of the door panel portion (51) of the damper (50). The sealing edge (54) cooperates with the hot air passage sealing rib (17) and the cold air passage sealing rib (13) to form the cold air passage (12) and the hot air passage (14) respectively.

10. The vehicle air conditioning unit according to claim 1, wherein, Rotary output shafts (55) are formed at both ends of the rotating shaft portion (52). The rotating output shafts (55) pass through the support through hole in the air conditioner housing (10). A bushing (59) is formed on the part of the rotating shaft portion (52) near the rotating output shaft (55), which is flared outward from the rotating shaft portion (52) and surrounds the rotating shaft portion (52). The bushing (59) abuts against the air conditioner housing (10) and covers the support through hole.

11. The vehicle air conditioning unit according to claim 1, wherein, The evaporator (30) is tilted toward the heater (40).

12. The vehicle air conditioning unit according to claim 1, wherein, The air conditioner housing (10) includes a drainage system (60) including a first drain outlet (62) and a second drain outlet (64). The first drain outlet (62) is located downstream of the evaporator (30), and the second drain outlet (64) is connected to the first drain outlet (64) to discharge condensate guided by the blocking member.

13. The vehicle air conditioning unit according to claim 3, wherein, When the damper (50) is in the first extreme position or the intermediate position, the rotating shaft portion (52) is closer to the evaporator (30) than the far end of the damper (50).

14. An automotive air conditioning system, comprising a vehicle air conditioning unit (1) according to any one of claims 1-13.

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