Air distribution device

Abstract

Provided is an air distribution device capable of making the temperature of air blown from an air outlet uniform. The air distribution device (100) is applied to a vehicle and comprises an air distribution housing (20), an evaporator (1), a heater core (3), an air outlet (9), and a damper (8). The damper has a damper shaft (810) extending along a first direction (D1); a base plate (820) connected to the damper shaft and rotatable about the first direction, the base plate being plate-shaped and extending along the first direction and a second direction (D2); and a flow guide (830, 840) provided on the base plate for mixing air that has not been heated by the heater core with air that has been heated by the heater core, the flow guide extending from a first surface (821) and / or a second surface (822) along a third direction (D3) that intersects the first direction and the second direction, the first surface being a surface of the base plate facing the air outlet, and the second surface being a surface opposite the first surface.

Description

Technical Field

[0001] This utility model relates to an air distribution device. Background Technology

[0002] To achieve air conditioning inside a vehicle, the air distribution unit of a vehicle's air conditioning system typically has air vents for blowing air into the vehicle interior, such as face vents, foot vents, and defrost vents. Air within the air distribution housing is guided to the corresponding locations inside the vehicle interior through these vents.

[0003] Technical problem to be solved by the utility model

[0004] However, due to the limited internal space of the air distribution device or various reasons such as the arrangement of components inside the air distribution device, the hot and cold air are not fully mixed when they reach the air outlet, resulting in uneven air temperature when blown out of the air outlet. Utility Model Content

[0005] Therefore, this utility model was made in view of the above-mentioned technical problems, and its purpose is to provide an air distribution device that can make the air blown out from the air outlet uniform in temperature.

[0006] Technical means for solving technical problems

[0007] To achieve the above objectives, one aspect of this utility model is an air distribution device applied to a vehicle, comprising: an air distribution housing having an air passage for airflow inside; an evaporator disposed within the air distribution housing; a heater core disposed within the air distribution housing, heating at least a portion of the air passing through the evaporator; an air vent formed through an opening in the air distribution housing; and a damper disposed at the air vent, controlling the amount of air blown out from inside the air distribution housing through the air vent by adjusting the opening degree of the air vent, the damper having: a wind... A door hinge extending along a first direction; a base plate connected to the door hinge and rotatable about the first direction, the base plate being plate-shaped extending along the first direction and a second direction intersecting the first direction; and a guide rib disposed on the base plate for mixing air not heated by the heater core with air heated by the heater core, the guide rib extending from a first surface and / or a second surface along a third direction intersecting the first and second directions, the first surface being the surface of the base plate facing the air outlet, and the second surface being the surface opposite to the first surface.

[0008] According to this structure, by providing guide ribs extending from the base plate of the damper, the airflow direction passing through the base plate can be appropriately guided, allowing hot and cold air to mix thoroughly before reaching the air outlet. Thus, without increasing the number of components, the temperature of the air blown from the air outlet can be made uniform. Furthermore, regardless of the angle to which the damper is rotated, the guide ribs can guide hot and cold air to mix properly before reaching the air outlet.

[0009] In one possible embodiment, in the air distribution device described above, when viewed along a fourth direction perpendicular to the plane where the evaporator is located, the damper is located between the end of the evaporator and the end of the heater core.

[0010] According to this structure, by positioning the damper between the ends of the evaporator and the heater core when viewed from a fourth direction, the size of the air distribution device in, for example, the vehicle height direction can be reduced, thereby achieving an overall flattening of the air distribution device. Furthermore, combined with the aforementioned guide ribs on the damper, even with a smaller overall size of the air distribution device, hot and cold air can be thoroughly mixed.

[0011] In one possible embodiment, the distance between the damper shaft and the central position of the heater core in the length direction perpendicular to the first direction is less than half the dimension of the evaporator in the length direction perpendicular to the first direction.

[0012] According to this structure, by positioning the damper shaft close to the heater core, the air distribution device can be flattened. Combined with the guide ribs on the damper, even with a flattened air distribution device, hot and cold air can be thoroughly mixed.

[0013] In one possible embodiment, in the above-described air distribution device, a guide rib is provided in the air distribution housing, which is arranged on the downstream side of the air flow direction relative to the heater core.

[0014] According to this structure, in cases where hot air heated by the heater core does not flow to the air outlet due to the limitations of the air distribution device structure, by setting guide ribs on the downstream side of the heater core, even when the air distribution device is flattened, the hot air can be properly guided from the heater core to the air outlet.

[0015] In one possible embodiment, in the above-described air distribution device, in the first direction, the guide rib is disposed at a position corresponding to the end of the substrate in the first direction, and the guide rib is arranged such that the narrower the width of the guide rib in the first direction, the greater the inclination of the guide rib relative to the second direction.

[0016] The narrower the width of the guide rib in the first direction, the narrower the width of the hot air flow guided by the guide rib towards the air outlet. Therefore, according to this structure, by relating the inclination of the guide rib to the width of the guide rib on the air distribution shell, that is, increasing the inclination of the guide rib as the width of the guide rib is narrower, the mixing of hot and cold air in the first direction can be promoted more effectively.

[0017] In one possible embodiment, in the above-described air distribution device, the guide rib includes a first guide rib that extends from the first surface toward the air outlet.

[0018] According to this structure, a first guide rib is provided on the first surface of the damper substrate facing the air outlet. The air in the air distribution housing is guided by the first guide rib on the first surface of the damper substrate before reaching the air outlet, thereby making the temperature of the air blown out from the air outlet uniform.

[0019] In one possible embodiment, in the above-described air distribution device, the first guide ribs are arranged in pairs relative to the center of the substrate in the first direction, and at least one pair of first guide ribs are arranged in the middle region of the substrate in the first direction. The at least one pair of first guide ribs are arranged such that they move away from each other in the first direction as they approach the damper shaft in the second direction.

[0020] According to this structure, at least one pair of first guide ribs are arranged in the middle region of the substrate in the first direction to move away from each other in the first direction as they approach the damper shaft in the second direction. As a result, the air flowing in the middle region of the first direction is guided to the end region of the first direction and mixed with the air flowing in the end region, thereby enabling the temperature of the air in the first direction to be uniform.

[0021] In one possible embodiment, in the above-described air distribution device, the first guide ribs are arranged in pairs relative to the center of the substrate in the first direction, and at least one pair of first guide ribs are arranged in the end region of the substrate in the first direction. The at least one pair of first guide ribs are arranged to approach each other in the first direction as they approach the damper shaft in the second direction.

[0022] According to this structure, at least one pair of first guide ribs are arranged in the end region of the substrate in the first direction to approach each other in the first direction as they approach the damper shaft in the second direction. As a result, the air flowing in the end region of the substrate in the first direction is guided to the middle region of the substrate in the first direction and mixed with the air flowing in the middle region, thereby enabling the temperature of the air in the first direction to be uniform.

[0023] In one possible embodiment, in the above-described air distribution device, the guide rib includes a second guide rib that extends from the second surface in a direction away from the air outlet.

[0024] According to this structure, since a second guide rib is provided on the second surface of the damper substrate, the air blown out from the evaporator is first guided by the second guide rib in the first direction when it flows through the substrate, and then merges with the heated air blown out from the heater core, thereby making the temperature of the air blown out from the air outlet uniform.

[0025] In one possible embodiment, in the above-described air distribution device, the second guide ribs are arranged in pairs relative to the center of the substrate in the first direction, and at least one pair of second guide ribs are arranged in the middle region of the substrate in the first direction, and the at least one pair of second guide ribs are arranged to approach each other in the first direction as they approach the damper shaft in the second direction.

[0026] According to this structure, at least one pair of second guide ribs are arranged in the middle portion of the substrate in the first direction to approach each other in the first direction as they approach the damper shaft in the second direction. As a result, the cold air flowing in the middle region of the substrate in the first direction is guided to the end region of the substrate in the first direction. Therefore, the cold air dispersed to the end region can mix with the air flowing in the end region after it wraps around the first surface of the substrate, thereby making the temperature of the air in the first direction uniform.

[0027] In one possible embodiment, in the above-described air distribution device, the guide ribs include at least one pair of guide ribs centrally disposed in the first direction relative to the substrate.

[0028] According to this structure, the number of guide ribs can be set according to the length of the air outlet in the first direction. Even when the air outlet is long, multiple pairs of guide ribs can be used to make the temperature of the blown air in the first direction of the air outlet uniform.

[0029] In one possible embodiment, in the above-described air distribution device, the at least one pair of guide ribs are spaced apart from each other and do not contact each other.

[0030] According to this structure, the pressure loss when air flows through the at least one pair of guide ribs can be reduced due to the spacing.

[0031] In one possible embodiment, in the above-described air distribution device, the air outlet is a defrost air outlet.

[0032] This structure ensures that the air temperature blowing out of the defrost vent is uniform, preventing localized fogging of the windshield caused by excessively cold air blowing onto certain areas.

[0033] Effects of the utility model

[0034] According to this utility model, an air distribution device can be provided to make the temperature of the air blown out from the air outlet uniform. Attached Figure Description

[0035] Figure 1 It is a schematic cross-sectional view of the air distribution device viewed along the first direction.

[0036] Figure 2 It is a schematic enlarged top view of a part of the air distribution device observed along a third direction.

[0037] Figure 3 It is observed along the first direction. Figure 1 A schematic side view of the damper in the middle.

[0038] Figure 4 It is observed along a third direction. Figure 3 A schematic top view of the damper in the middle.

[0039] Figure 5 This is a schematic top view of the damper in the modified example, viewed along a third direction.

[0040] Figure 6 It is observed along a third direction. Figure 3 A schematic bottom view of the damper in the middle.

[0041] Symbol Explanation

[0042] 100… air distribution device, 1… evaporator, 2… sliding damper, 3… heater core, 4… cold air passage, 5… guide rib, 6… warm air passage, 7… mixing air passage, 8… damper, 810… damper shaft, 820… base plate, 821… first surface, 822… second surface, 830… first guide rib, 840… second guide rib, 9… air outlet, 20… air distribution housing. Detailed Implementation

[0043] The following description, with reference to the accompanying drawings, illustrates specific embodiments of the present invention. The specific embodiments described below are merely illustrative of the possible structures of the present invention and are not intended to limit it. In each embodiment, the same or similar elements are sometimes labeled with the same reference numerals, and repeated descriptions are omitted.

[0044] Furthermore, it should be understood that the terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The directional terms such as "up / down," "left / right," and / or "front / back" are defined based on the directions in the corresponding drawings for ease of explanation and are not intended to limit position or spatial orientation.

[0045] In the following text, for ease of description, the extending direction of the damper shaft 810 is defined as the first direction D1, the direction of the substrate 820 extending radially outward toward the damper shaft 810 is defined as the second direction D2, and the direction in which the first guide rib 830 and the second guide rib 840 extend outward from the substrate 820 is defined as the third direction D3.

[0046] Reference Figure 1 , Figure 2 The structure of the air distribution device 100 is described. Figure 1 This is a schematic cross-sectional view of the air distribution device 100 viewed along the first direction D1. Figure 2 This is a partial, enlarged top view of the air distribution device 100 viewed along the third direction D3.

[0047] The air distribution device 100 is used in a vehicle's air conditioning system to blow temperature-regulated air into spaces such as the passenger compartment. Figure 1 As shown, the air distribution device 100 includes an air distribution housing 20, an evaporator 1, a sliding damper 2, a heater core 3, a damper 8, and an air outlet 9. The evaporator 1, the sliding damper 2, and the heater core 3 are disposed within the air distribution housing 20.

[0048] Specifically, the evaporator 1 and the heater core 3 are arranged in a generally parallel manner along... Figure 1 The air distribution device 100 is arranged vertically within the air distribution housing 20. Here, "approximately parallel" means that the angle between the evaporator 1 and the heater core 3 is between 0 and 10 degrees. Compared to a structure where the heater core 3 is inclined relative to the evaporator 1, this arrangement avoids the air distribution device 100 being positioned in an angle, for example, in the vehicle's longitudinal direction (e.g., the front-to-rear direction). Figure 1 The dimension in the left-right direction is increased. The heater core 3 heats at least a portion of the air passing through the evaporator 1. The sliding damper 2 is sandwiched between the evaporator 1 and the heater core 3 to regulate the amount of air flowing from the evaporator 1 to the heater core 3, thereby adjusting the temperature of the air blown into the cabin.

[0049] The air distribution housing 20 has internal air passages, including, for example, a cold air passage 4 for cold air blowing from the evaporator 1, a warm air passage 6 for heated air, and a mixing air passage 7 for mixing cold and hot air. The cold air passing through the cold air passage 4 and the hot air passing through the warm air passage 6 merge in the mixing air passage 7.

[0050] Air vent 9 is formed through an opening in the air distribution housing 20. In this embodiment, air vent 9 is a defrosting air vent used to blow temperature-regulated air onto the vehicle's windshield. A damper 8 is provided at air vent 9. It has a damper shaft 810 and a base plate 820. The damper shaft 810 extends along a first direction D1, and the base plate 820 is connected to the damper shaft 810 and rotatable about the first direction D1. The base plate 820 is plate-shaped, extending along the first direction D1 and a second direction D2 intersecting the first direction. By rotating the base plate 820 about the first direction D1, the damper 8 can adjust the opening of air vent 9, thereby controlling the amount of air blown from the interior of the air distribution housing 20 through air vent 9 into the vehicle interior.

[0051] In order to minimize the impact of the air distribution device 100 in, for example, the vehicle height direction ( Figure 1 Regarding the dimensions in the vertical direction, the damper 8 is configured such that, when viewed along the fourth direction D4 perpendicular to the plane where the evaporator 1 is located, the damper 8 is located between the end of the evaporator 1 and the end of the heater core 3. This allows for the overall flattening of the air distribution device 100.

[0052] As another way to achieve a flattened air distribution device 100, such as Figure 1 As shown, the distance L1 between the damper shaft 810 of the damper 8 and the center position of the heater core 3 in the length direction perpendicular to the first direction D1 is less than half of the dimension L2 of the evaporator 1 in the length direction perpendicular to the first direction D1 (i.e., L1 < 1 / 2 * L2). That is, by reducing the distance between the damper shaft 810 and the heater core 3, the damper 8 is positioned closer to the heater core. This allows for the flattening of the air distribution device 100.

[0053] Because the distance between the damper shaft 810 and the heater core 3 is reduced, the damper 8 and the air vent 9 are located in the cold air passage 4. Specifically, the base plate 820 of the damper 8 has a first surface 821 facing the air vent 9 and a second surface 822 that is opposite to the first surface 821. The second surface 822, the housing of the heater core 3, and the air distribution housing 20 together form the cold air passage 4. In this configuration, although cold air can flow to the air vent 9 through the cold air passage 4, there is a possibility that the hot air heated by the heater core 3 may not flow to the air vent 9 but instead flow to other areas. This results in low air temperature blowing out of the air vent 9, especially when the air vent 9 is a defrosting air vent, the low temperature blowing onto the vehicle's windshield can also cause the windshield to fog up.

[0054] In this regard, such as Figure 1As shown, a guide rib 5 is provided in the air distribution housing 20, which is arranged on the downstream side of the air flow direction relative to the heater core 3. Thus, even when the air distribution device 100 is flattened, the guide rib 5 can be used to properly guide hot air from the heater core 3 to the air outlet 9, thereby appropriately increasing the temperature of the air blown out of the air outlet 9.

[0055] On the other hand, although cold and hot air merge in the mixing passage 7, the distribution of cold and hot air is not uniform in the first direction extended by the damper shaft 810. For example, because the grooves on both sides of the sliding damper 2 in the first direction D1 obstruct the airflow, the cold air passing from the evaporator 1 through the sliding damper 2 tends to concentrate in the middle area of ​​the sliding damper 2 in the first direction D1. In particular, due to the flattened structure of the air distribution device 100, the mixing passage 7 for the air flowing to the air outlet 9 is short, and the cold and hot air are not sufficiently mixed in the mixing passage 7. Therefore, for a temperature zone divided by a sliding damper 2, hot air tends to concentrate in the two sides of the first direction D1, and cold air tends to concentrate in the middle area of ​​the first direction D1. The substrate 820 in the damper 8 is provided, for example, corresponding to the temperature zone. In this embodiment, two temperature zones are arranged in the first direction D1, so there are two substrates 820 arranged in the first direction D1. That is, for a given temperature zone, the air blown out from the vent 9 is hotter on both sides of the substrate 820 in the first direction D1, and colder in the middle region of the substrate 820 in the first direction D1. This results in uneven air temperature from the vent 9. In particular, when the vent 9 is a defrost outlet, the uneven temperature in the first direction D1 can cause localized fogging of the windshield.

[0056] In this regard, a schematic side view of the damper 8 observed along the first direction D1 is shown. Figure 3 As shown, the damper 8 has guide ribs for mixing cold air that has not been heated by the heater core 3 with hot air that has been heated by the heater core 3. The guide ribs include a first guide rib 830 and a second guide rib 840. The first guide rib 830 and the second guide rib 840 are disposed on the substrate 820. The first guide rib 830 extends from the first surface 821 of the substrate 820 facing the air outlet 9 along a third direction D3 that intersects the first direction D1 and the second direction D2. The second guide rib 840 extends from the second surface 822 of the substrate 820, which is the surface opposite to the first surface 821, along the third direction D3.

[0057] By providing a first guide rib 830 and / or a second guide rib 840 extending from the substrate 820 of the damper 8, the airflow direction passing through the substrate 820 can be appropriately guided, allowing hot and cold air to mix sufficiently in the first direction D1 before reaching the air outlet 9. This enables uniform temperature of the air blown from the air outlet 9 without increasing the number of components. Furthermore, regardless of the angle to which the damper 8 is rotated, the first guide rib 830 and / or the second guide rib 840 can guide hot and cold air to mix appropriately before reaching the air outlet 9.

[0058] Additionally, guide ribs 5 are provided on the air distribution housing 20; specifically, guide ribs 5 are formed together with the air distribution housing 20. The damper shaft 810 is fixed to the side wall of the air distribution housing 20 in the first direction D1. For example... Figure 2 As shown, the guide rib 5 is typically positioned corresponding to the end of the substrate 820 in the first direction D1. As mentioned above, hot air tends to concentrate in the bilateral regions of the substrate 820 in the first direction D1, while cold air tends to concentrate in the central region of the substrate 820 in the first direction D1. Figure 2 In the diagram, solid lines represent hot air currents, and dashed lines represent cold air currents. For example... Figure 2 As shown, the hot airflow guided by the guide rib 5 may flow towards the air outlet 9 without mixing with the cold air in the first direction D1. Therefore, the placement of the guide rib 5 may exacerbate the problem of uneven temperature in the first direction D1 to some extent.

[0059] The narrower the width of the guide rib 5 in the first direction D1, the narrower the flow of hot air guided by the guide rib 5 towards the air outlet 9. Therefore, in order to properly mix the hot and cold air in the first direction, the first guide rib 830 is arranged such that the narrower the width of the guide rib 5 in the first direction D1, the greater the inclination of the first guide rib 830 relative to the second direction D2. For the same reason, although not shown, the second guide rib 840 is also arranged such that the narrower the width of the guide rib 5 in the first direction D1, the greater the inclination of the second guide rib 840 relative to the second direction D2. By relating the inclination of the first guide rib 830 and / or the second guide rib 840 relative to the second direction D2 to the width of the guide rib 5 on the air distribution housing 20 in the first direction D1, that is, the narrower the width of the guide rib 5, the greater the inclination of the first guide rib 830 and the second guide rib 840, the mixing of hot and cold air in the first direction D1 can be more effectively promoted.

[0060] The following is based on Figures 4-6 Further explanation of the specific structure of the first guide rib 830 and the second guide rib 840.

[0061] Figure 4 It is observed along the third direction D3. Figure 3 A schematic top view of damper 8 in the diagram. (See attached diagram.) Figure 4 As shown, the first guide rib 830 is positioned relative to the center of the first direction D1 of the substrate 820 (see...). Figure 4 The dotted lines in the diagram are arranged in pairs. These pairs of first guide ribs 830 are disposed in the middle region of the substrate 820 in the first direction D1. The pair of first guide ribs 830 are arranged such that they move further apart from each other in the first direction D1 as they approach the damper shaft 810 in the second direction D2. As a result, the cold air flowing in the middle region of the substrate 820 in the first direction D1 is guided towards the end region of the substrate 820 in the first direction D1, thereby mixing with the hot air flowing in that end region, thus enabling uniform temperature of the air in the first direction D1.

[0062] Furthermore, although a pair of first guide ribs 830 are disposed in the middle region of the substrate 820 in the first direction D1, they are arranged to be spaced apart from each other without contacting each other. In particular, there is a gap between the two ends of the pair of first guide ribs 830 that are close to each other. As a result, the pressure loss when air flows through the space between the pair of first guide ribs 830 can be reduced.

[0063] Figure 5 This is a schematic top view of the modified damper 8 viewed along the third direction D3. Figure 5 In the modified example shown, the arrangement of the first guide rib 830 is the same as... Figure 4 The differences. In Figure 5 In this configuration, a pair of first guide ribs 830 are disposed in the end region of the substrate 820 in the first direction D1, and are arranged such that they approach each other in the first direction D1 as they approach the damper shaft 810 in the second direction D2. As a result, hot air flowing in the end region of the substrate 820 in the first direction D1 is guided towards the middle region of the substrate 820 in the first direction D1, thereby mixing with the cold air flowing in the middle region, thus enabling uniform temperature of the air in the first direction D1.

[0064] Figure 6 It is observed along the third direction D3. Figure 3 A schematic bottom view of damper 8 in the diagram. (See attached image.) Figure 6As shown, the second guide rib 840, like the first guide rib 830, is arranged in pairs relative to the center of the first direction D1 of the substrate 820. Since the second surface 822 of the substrate 820 is located in the cold air channel 4 and only cold air flows through it, the second guide rib 840 provided on the second surface 822 is used to guide the cold air flow concentrated in the middle region of the first direction D1 of the substrate 820 to both sides of the first direction D1. Therefore, a pair of second guide ribs 840 are provided in the middle region of the substrate 820 in the first direction D1, and the pair of second guide ribs 840 are arranged to approach each other in the first direction D1 as they approach the damper shaft 810 in the second direction D2. Since the cold air flowing in the middle region of the first direction D1 of the substrate 820 is guided to the end region of the substrate 820 in the first direction D1, the cold air dispersed to the end region can mix with the hot air flowing in the end region after passing around the first surface 821 of the substrate 820, thereby making the temperature of the air in the first direction D1 uniform.

[0065] Furthermore, similar to the first guide rib 830, the pair of second guide ribs 840 are configured to be spaced apart from each other without contact. In particular, there is a gap between the two adjacent ends of the pair of second guide ribs 840. This reduces the pressure loss when air flows through the space between the pair of second guide ribs 840.

[0066] <Other variations>

[0067] In the above embodiment, the example shown is that the air vent 9 is a defrosting air vent, but the air vent 9 can also be a face air vent, foot air vent, or other air vent used to blow air to other parts of the vehicle interior.

[0068] In the above embodiment, an example is shown in which a first guide rib 830 and a second guide rib 840 are provided on the substrate 820, but only either the first guide rib 830 or the second guide rib 840 may be provided.

[0069] In the above embodiments, a flat-structured air distribution device 100 is illustrated, but in non-flat-structured air distribution devices, guide ribs (first guide rib 830 and / or second guide rib 840) can also be provided on the base plate of any damper.

[0070] In the above embodiment, an example with a pair of guide ribs (a pair of first guide ribs 830 and a pair of second guide ribs 840) is shown, but multiple pairs of guide ribs can also be provided. The number of pairs of guide ribs can be set according to the length of the air outlet 9 in the first direction D1. Therefore, even when the length of the air outlet 9 is long, multiple pairs of guide ribs can be used to make the temperature of the blown air at various points in the first direction D1 of the air outlet 9 uniform.

[0071] In the above embodiments, the first guide rib 830 and the second guide rib 840 are shown as being provided in pairs, but the first guide rib 830 and the second guide rib 840 may also be provided unpaired. The number of each of the first guide rib 830 and the second guide rib 840 can be one or more as needed.

Claims

1. An air distribution device, used in a vehicle, characterized in that, have: An air distribution housing having an internal air passage for airflow; An evaporator, which is disposed within the air distribution housing; A heater core disposed within the air distribution housing, which heats at least a portion of the air passing through the evaporator; An air vent, which is formed through an opening in the air distribution housing; as well as An air damper, located at the air outlet, controls the amount of air blown out from inside the air distribution housing through the air outlet by adjusting the opening degree of the air outlet. The damper has the following features: A damper shaft that extends along a first direction; A substrate, which is connected to the damper shaft and can rotate freely about the first direction, wherein the substrate is plate-shaped and extends along the first direction and a second direction intersecting the first direction; as well as A guide rib is disposed on the substrate for mixing air that has not been heated by the heater core with air that has been heated by the heater core. The guide rib extends from a first surface and / or a second surface along a third direction that intersects the first direction and the second direction. The first surface is the surface of the substrate facing the air outlet, and the second surface is the surface opposite to the first surface.

2. The air distribution device according to claim 1, characterized in that, When viewed along a fourth direction perpendicular to the plane in which the evaporator is located, the damper is situated between the end of the evaporator and the end of the heater core.

3. The air distribution device according to claim 1, characterized in that, The distance between the damper shaft and the center position of the heater core in the length direction perpendicular to the first direction is less than half the dimension of the evaporator in the length direction perpendicular to the first direction.

4. The air distribution device according to claim 2 or 3, characterized in that, The air distribution housing is provided with guide ribs, which are arranged on the downstream side of the air flow direction relative to the heater core.

5. The air distribution device according to claim 4, characterized in that, In the first direction, the guide rib is positioned at a location corresponding to the end of the substrate in the first direction. The guide ribs are arranged such that the narrower the width of the guide ribs in the first direction, the greater the degree of inclination of the guide ribs relative to the second direction.

6. The air distribution device according to any one of claims 1 to 3, characterized in that, The guide rib includes a first guide rib that extends from the first surface toward the air outlet.

7. The air distribution device according to claim 6, characterized in that, The first guide ribs are arranged in pairs relative to the center of the substrate in the first direction. At least one pair of first guide ribs are disposed in the middle region of the substrate in the first direction. The at least one pair of first guide ribs are arranged such that they move away from each other in the first direction as they approach the damper shaft in the second direction.

8. The air distribution device according to claim 6, characterized in that, The first guide ribs are arranged in pairs relative to the center of the substrate in the first direction. At least one pair of first guide ribs are disposed in the end region of the substrate in the first direction. The at least one pair of first guide ribs are arranged to approach each other in the first direction as they approach the damper shaft in the second direction.

9. The air distribution device according to any one of claims 1 to 3, characterized in that, The guide rib includes a second guide rib that extends from the second surface in a direction away from the air outlet.

10. The air distribution device according to claim 9, characterized in that, The second guide ribs are arranged in pairs relative to the center of the substrate in the first direction, and at least one pair of second guide ribs are arranged in the middle region of the substrate in the first direction. The at least one pair of second guide ribs are arranged to approach each other in the first direction as they approach the damper shaft in the second direction.

11. The air distribution device according to any one of claims 1 to 3, characterized in that, The guide ribs include at least one pair of guide ribs centrally disposed in the first direction relative to the substrate.

12. The air distribution device according to claim 11, characterized in that, The at least one pair of guide ribs are spaced apart from each other and do not contact each other.

13. The air distribution device according to any one of claims 1 to 3, characterized in that, The air vent is a defrosting air vent.

Images