Air conditioning unit for vehicle air conditioning device

Abstract

The present application aims to provide an air conditioning unit of a vehicle air conditioning device, which prevents condensate from falling directly into a drain hole from a sealing member covering a lower surface of an evaporator when a vehicle is tilted with the side of the vehicle air conditioning device provided with the drain hole lowered. An evaporator 20 housed in an inner space S of a housing 11 is provided with a sealing member 30 covering a lower surface 20a of the evaporator in a manner that the lower surface 20a of the evaporator is covered, a drain hole 16 is formed near an end portion of the lower surface 20a of the evaporator in a length direction of the bottom portion 15, and the sealing member 30 has a condensate falling promoting portion 36 and a condensate falling prevention region 37, the condensate falling prevention region 37 being located above a vertical direction L1 of the drain hole 16 when a surface of the sealing member 30 is lowered toward the drain hole 16 in a tilt (R) accompanying a tilt of the vehicle.

Description

Technical Field

[0001] The present invention relates to an air conditioning unit for a vehicle air conditioning system in which an evaporator is housed in an internal space of the housing for air supply and circulation, and particularly to a structure in which a sealing member is provided on the lower surface of the evaporator to cover the lower surface of the evaporator. Background Technology

[0002] In an air conditioning unit for a vehicle that houses an evaporator within the internal space of the housing, in order to prevent a portion of the supply air from failing to adequately exchange heat with the evaporator through the gap between the outer peripheral surface of the evaporator and the housing when the supply air flows through the evaporator, for example, in Patent Document 1, a sealing component is provided on the outer peripheral surface of the evaporator.

[0003] Furthermore, in order to discharge the condensate generated by the evaporator to the outside of the housing of the vehicle air conditioning unit, a drain hole is provided at the bottom of the housing, for example as shown in Patent Document 2.

[0004] For example, as in this application Figure 5 As shown, due to the vehicle's tilt in the lateral direction, or, although not shown, in the longitudinal direction, or both, in the lateral and longitudinal directions, the surface of the sealing member opposite the bottom of the housing may tilt downwards towards the drain hole. In this case, condensate generated in the evaporator and circulating back to the sealing member opposite the bottom of the housing may flow on the surface of the sealing member, or soak into the sealing member and move towards the drain hole, forming droplets above the drain hole and falling directly towards it. When the condensate droplets falling directly into the drain hole collide with the cylindrical portion extending from the drain hole outwards from the housing, or with the drain hose connected to that cylindrical portion, abnormal noise may occur.

[0005] Existing technical documents

[0006] Patent documents

[0007] Patent Document 1: Japanese Patent Application Publication No. 2006-273148

[0008] Patent Document 2: Japanese Patent Application Publication No. 2003-136950 Summary of the Invention

[0009] The technical problem that the invention aims to solve

[0010] The sealing member shown in Patent Document 1 has a cutout formed at the lower surface of the evaporator, consisting of a portion extending from the center of the lower surface of the evaporator in a direction orthogonal to the ventilation direction and a portion extending downwind from the portion extending in the direction orthogonal to the ventilation direction.

[0011] However, the cutout formed in the sealing component of the aforementioned Patent Document 1 is used to prevent the condensate from freezing by exposing the portion of the evaporator that is prone to low temperature.

[0012] Furthermore, Patent Document 1 does not specify the positional relationship between the cut-out portion and the drain hole provided in the housing. It is unclear whether the condensed water that falls as water droplets in the drain hole will collide with the cylindrical portion extending from the drain hole outward from the housing or the drain hose connected to the cylindrical portion and produce abnormal noise.

[0013] The present invention was made to solve the above-mentioned technical problems, and its purpose is to provide an air conditioning unit for a vehicle air conditioning device that can prevent condensate from falling directly into the drain hole as water droplets even when the surface of the sealing member opposite to the bottom of the housing is tilted downward toward the drain hole.

[0014] Technical solutions for solving technical problems

[0015] To achieve the above objectives, the air conditioning unit (10) of the vehicle air conditioning device (1) described in technical solution 1 houses an evaporator (20) in a housing (11) having an internal space (S) for supplying airflow. A drain hole (16) is provided at the bottom (15) of the housing (11) for discharging condensate generated in the evaporator (20) to the outside of the housing (11). The air conditioning unit (10) of the vehicle air conditioning device (1) is characterized in that the evaporator (20) has a lower surface (20a) on its side, which faces the inner side (15a) of the bottom (15) and extends longitudinally in a direction orthogonal to the ventilation direction of the supply air. 20a) A sealing member (30) covered by a drain hole (16) is formed near the end of the lower surface (20a) of the evaporator in the bottom (15) along the length direction. The sealing member (30) has a stepped condensate drip-promoting portion (36) and a condensate drip-preventing region (37) surrounded by the condensate drip-promoting portion (36). The condensate drip-preventing region (37) is located above the drain hole (16) in the vertical direction (L1) when the surface of the sealing member (30) is lower towards the drain hole (16) due to an inclination (R) that causes one side of the sealing member (30) to be lower than the other side in the left-right direction and / or front-rear direction of the vehicle (100). The air conditioning unit also includes offset type, semi-integrated type, and fully integrated type, which are arranged side by side with a blower unit that houses the blower.

[0016] Therefore, with the surface of the sealing member inclined downwards towards the drain hole, and the sealing member being lower than one side relative to the vehicle's left-right and / or front-back directions, the condensate dripping prevention area surrounded by the condensate dripping promotion part is located above the drain hole of the sealing member in the vertical direction. Thus, when the condensate reaches the stepped condensate dripping promotion part, it forms droplets and drips downwards, preventing droplets from falling into the condensate dripping prevention area. This prevents condensate from dripping directly into the drain hole and colliding with the cylindrical protrusion or drain hose extending downwards from the drain hole, thus preventing noise.

[0017] In the air conditioning unit (10) of the vehicle air conditioning device (1) described in technical solution 2, the condensate dripping prevention area (37) is a cut-out portion (38) that cuts off a part of the sealing member (30), and the condensate dripping promotion portion (36) is a step formed by the sealing member (30) and the cut-out portion (38).

[0018] Therefore, with the surface of the sealing member inclined downwards towards the drain hole, and the sealing member being lower than one side relative to the vehicle's left-right and / or front-back directions, the cut-out portion is located above the drain hole in the vertical direction of the sealing member when condensate moves on the sealing member towards the drain hole. Around the cut-out portion, a step formed by the cut-out portion and the sealing member, i.e., a condensate drip-promoting portion, is formed. Therefore, when the condensate reaches the step between the sealing member and the cut-out portion, it forms droplets and promotes dripping, preventing droplets from falling from the cut-out portion. Thus, it prevents condensate from falling directly into the drain hole as droplets and colliding with the cylindrical protrusion or drain hose extending downwards from the drain hole, thereby preventing abnormal noise.

[0019] In the air conditioning unit (10) of the vehicle air conditioning device (1) described in technical solution 3, the cutout (38) is formed at a position separated from the drain hole (16) by a constant distance (D1).

[0020] In this way, by forming the cut at a constant distance from the drain hole, it is possible to prevent condensate from dripping into the drain hole and to reduce the area of ​​the cut.

[0021] In the air conditioning unit (10) of the vehicle air conditioning device (1) described in technical solution 4, the condensate dripping promotion part (36) is characterized in that the condensate dripping promotion part (36) further has a corner part (39), which is formed by a portion (39a) extending along the ventilation direction of the air supply air flowing in the evaporator (20) and a portion (39b) extending orthogonally to the ventilation direction of the air supply air.

[0022] Depending on the vehicle's tilt, the evaporator may tilt not only in a direction perpendicular to the ventilation direction, but also in a direction along the ventilation direction or a combination thereof. By forming an angle in the condensate dripping promotion section, water droplets will collect in any tilted state, further promoting the dripping of water droplets. By preventing water droplets from falling in the condensate dripping prevention area, water droplets can be prevented from falling directly into the drain hole.

[0023] In the air conditioning unit (10) of the vehicle air conditioning device (1) described in technical solution 5, the condensate dripping prevention area (37) is a region in which a secondary sealing member (40) is disposed overlapping the sealing member (30), and the condensate dripping promotion part (36) is a step formed by the sealing member (30) and the secondary sealing member (40).

[0024] Therefore, with the sealing component's surface tilted downwards towards the drain hole, and the side lower than the other in the left-right and / or front-back directions of the vehicle, the area where the secondary sealing component overlaps is located above the drain hole in the vertical direction. The secondary sealing component is surrounded by a step formed by the sealing component and the secondary sealing component, i.e., a condensate dripping promotion section. Thus, when the condensate reaches the step between the sealing component and the secondary sealing component, it forms droplets and drips downwards, preventing droplets from falling from the area where the secondary sealing component overlaps with the sealing component. Therefore, it prevents condensate from dripping directly into the drain hole and colliding with the cylindrical protrusion or drain hose extending downwards from the drain hole, thus preventing abnormal noise.

[0025] The effects of the invention

[0026] As described above, according to the present invention, even if the surface of the sealing member opposite to the bottom of the housing is inclined downward toward the drain hole, it is possible to prevent condensate from falling directly into the drain hole as water droplets. Attached Figure Description

[0027] Figure 1 This is an illustrative diagram showing an example of a vehicle air conditioning unit with an evaporator fitted with a sealing component.

[0028] Figure 2 This is a cross-sectional view of the air conditioning unit of the vehicle air conditioning system along line I-I, and an explanatory diagram showing the state with the upper side of the housing removed.

[0029] Figure 3These are explanatory diagrams showing the state of the evaporator with the sealing member provided in the first embodiment. (a) is a view viewed from the upstream side in the ventilation direction, (b) is a view viewed from the downstream side in the ventilation direction, (c) is a bottom view, and (d) is a side view.

[0030] Figure 4 These are explanatory diagrams illustrating an example of an evaporator to which the present invention can be applied: (a) is a view viewed from the ventilation direction, (b) is a side view, and (c) is a bottom view.

[0031] Figure 5 This is an explanatory diagram showing a vehicle and its vehicle air conditioning unit tilted at a specified angle.

[0032] Figure 6 This indicates that in the first embodiment... Figure 5 This diagram illustrates the positional relationship between the drain hole and the condensate drainage prevention area (cutout) when the vehicle is tilted.

[0033] Figure 7 (a) indicates that in the first embodiment... Figure 5 (a) is an explanatory diagram showing the movement of condensate toward the drain hole when the vehicle is tilted. (b) is a partial enlarged view of (a) showing the condensate falling from the condensate fall promoter.

[0034] Figure 8 (a) and (b) are explanatory diagrams showing the state in which the center line of the cut and the position of the drain hole are offset from the center line of the evaporator in the width direction, respectively.

[0035] Figure 9 (a) is an explanatory diagram showing a modified example of the first embodiment, and (b) is a partial enlarged view of (a).

[0036] Figure 10 These are explanatory diagrams illustrating a scheme in which the secondary sealing member of the second embodiment is overlapped with the sealing member in the evaporator. (a) is a view viewed from the upstream side in the ventilation direction, (b) is a view viewed from the downstream side in the ventilation direction, (c) is a bottom view, and (d) is a side view.

[0037] Figure 11 This indicates that in the second embodiment... Figure 5 A diagram illustrating the positional relationship between the drain hole and the condensate-prevention zone formed by overlapping the sub-seal component with the seal component when the vehicle is tilted.

[0038] Figure 12 (a) indicates that in the second embodiment... Figure 5 (a) is an explanatory diagram showing the movement of condensate toward the drain hole when the vehicle is tilted. (b) is a partial enlarged view of (a) showing the condensate falling from the condensate fall promoter. Detailed Implementation

[0039] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Figure 1 , Figure 4 , Figure 5 The diagram illustrates an example of the structure of a vehicle air conditioning unit 1 and an evaporator 20, which are common structures in this invention, and an example of the vehicle air conditioning unit 1 being mounted on a vehicle 100. Figure 2 , Figure 3 , Figures 6 to 8 In the image, the first example of an embodiment of the present invention is represented. Figure 9 The example shown is a modified version of the first embodiment of the present invention. Figures 10 to 12 The text in the image represents a second example of an embodiment of the present invention.

[0040] exist Figure 1 In the present invention, an example of a vehicle air conditioning unit 1 to which the present invention is applicable is shown, which is the appearance as viewed from the rear of the vehicle. Figure 1 The vehicle air conditioning unit 1 shown is also as described in this invention. Figure 5 As shown, the blower unit 2 and the air conditioning unit 10 are arranged in a transverse configuration in the left-right direction of the vehicle 100.

[0041] Figure 1 The blower unit 2 has a blower housing 5 consisting of an upper housing component 6 and a lower housing component 7. The upper housing component 6 is appropriately provided with an external gas inlet 3 and an internal gas inlet 4, and houses an internal / external gas switching damper for appropriately adjusting the ratio of external gas introduced from the external gas inlet 3 to internal gas introduced from the internal gas inlet 4. The lower housing component 7 houses a blower. The blower has an electric motor and a blower fan. The electric motor has a rotating shaft, and the blower fan is mounted on the rotating shaft. The internal / external gas switching damper and the blower fan are not shown in the figure.

[0042] The air conditioning unit 10 is directly or indirectly connected to the blower unit 2, such as... Figure 1 general Figure 1 The air conditioning unit 10 is divided at the position of line I-I. Figure 2 The device shown includes a housing 11, which has an internal space S for the flow of supply air from the blower unit 2. It should be noted that... Figure 2 The diagram shows the structure with the upper part of the housing 11 removed. Regarding the housing 11 that forms the internal space S, it is unnecessary to provide a specific description in this invention, except for the bottom 15 of the housing 11; therefore, Figure 2 The upper part of the housing 11 is omitted from the illustration.

[0043] In this embodiment, such as Figure 2 As shown, an evaporator 20, serving as a heat exchanger for cooling, is housed within the internal space S of the casing 11. Air conditioning equipment such as a heating element or an air mixing damper is also housed there. Air conditioning equipment other than the evaporator 20 is not shown in the diagram. Figure 1 As shown, a defrost outlet 12, a ventilation outlet 13, and a foot outlet 14 are provided on the outer surface for blowing out air appropriately regulated by the air conditioning equipment. A drain hole 16 is formed at the bottom 15 of the housing 11 for discharging condensate generated in the evaporator 20 to the outside of the housing 11. Furthermore, in this embodiment, a cylindrical portion 17 extends downward from the outer periphery of the drain hole 16, and a drain hose 18 is connected to the cylindrical portion 17. The wall thickness of the cylindrical portion 17 is thinner than the wall thickness of the housing 11.

[0044] Figures 2 to 4 , Figures 6 to 12 The evaporator 20 shown, together with a compressor (not shown), constitutes a refrigeration cycle. In the evaporator 20, especially... Figure 4 As shown, pipes 21 and fins 22, each having a refrigerant flow path inside, are alternately stacked. End plates 23 are arranged on both sides of the stacking direction, and the openings on both sides of the pipe 21 in the longitudinal direction are connected to the upper tank 24 and the lower tank 25. Inlet and outlet portions 26 and 27 are provided on one side of the upper tank 24 in the longitudinal direction, and the tanks 24 and 25 are appropriately divided. Thus, the refrigerant entering the upper tank 24 from the inlet portion 26 flows appropriately within the pipes 21, tanks 24 and 25, then flows to the upper tank 24 and exits from the outlet portion 27.

[0045] In this embodiment, the lower surface of the lower tank 25 is the lower surface 20a of the evaporator. The lower surface 20a of the evaporator faces the inner side 15a of the bottom 15 of the housing 11 and extends in a direction orthogonal to the ventilation direction of the airflow passing between the pipes 21, 21 or between the pipes 21 and the end plate 23 of the evaporator 20. That is, the length direction of the lower surface 20a of the evaporator is not limited to the direction along the left-right direction of the vehicle 100. The types of evaporators 20 to which this invention is applicable are only limited to those having a lower surface 20a extending in a direction orthogonal to the ventilation direction of the airflow. Figure 4 The tube 21 shown is a separate evaporator 20 consisting of tanks 24 and 25.

[0046] In the housing 11 that houses the evaporator 20, the aforementioned drain hole 16 is as follows: Figure 2 , Figure 11 As shown, it is formed near the end of the lower surface 20a of the evaporator in the length direction in the bottom 15, and opens on the inner side 15a of the bottom 15 in such a way as to the side of the lower surface 20a of the evaporator.

[0047] In the evaporator 20, in order to seal between it and the housing 11 and to prevent vibration of the evaporator 20, particularly as Figure 2 , Figure 3 and Figure 10 The sealing component 30 is installed as shown. The sealing component 30 is made of a foamed resin material such as polyethylene foam or polyurethane foam. The shape of the sealing component 30 and its installation position and range relative to the evaporator 20 are extensive. Figure 2 , Figure 3 and Figure 10 The illustration shows one example. As a sealing member 30 to which the present invention is applied, it has a cover portion 33a that covers the lower surface 20a of the evaporator.

[0048] The following is about Figure 2 , Figure 3 and Figure 10 An example of the common structure of the sealing member 30 shown in the figure will be described. The sealing member 30 has an upper portion 31, a side portion 32, and a lower portion 33. The upper portion 31 is shaped as follows: Figure 4 The upper surface of the upper tank 24, the upstream side in the ventilation direction, the downstream side in the ventilation direction, and the side surface along the ventilation direction are covered in a U-shape. The side portions 32, 32 are... Figure 4 The end plates 23, 23 have a plate-like shape covering their outer side surfaces. The lower part 33 is shaped like... Figure 4 The lower tank 25 has a U-shaped cover on its side (lower surface 20a of the evaporator), upstream side in the ventilation direction, downstream side in the ventilation direction, and along the side in the ventilation direction. At the junction of the upper portion 31 and the side portion 32, and at the junction of the side portion 32 and the lower portion 33, as shown... Figure 3 (d) Figure 10 As shown in (d), a stepped structure is created. The lower part 33 is particularly as follows: Figure 3 (b) Figure 10 As shown in (b), there are plate-shaped upright installation portions 33b and 33c that are erected from both edges along the length direction of the plate-shaped cover portion 33a that covers the lower surface 20a of the evaporator, wherein the upright installation portion 33c on the downstream side of the ventilation direction has a drainage response portion 34 cut out in an upward-open form at the central part in the length direction of the lower surface 20a of the evaporator.

[0049] With the structure of such a sealing component 30 and the positional relationship between the drain hole 16 and the lower surface 20a of the evaporator, accompanied by... Figure 5 As shown, when vehicle 100 tilts at a predetermined angle R (e.g., 10°) in the left-right direction, vehicle 100 exhibits a tilt that is lower than one side in the left-right and / or front-back directions compared to the other side, thus creating a tilt. Figure 6 , Figure 11As shown, the surface of the cover portion 33a of the sealing member 30 is also tilted at a predetermined angle R, and the surface of the cover portion 33a of the sealing member 30 is lowered towards the drain hole 16.

[0050] Therefore, the condensate produced in evaporator 20 is as follows Figure 7 (a) Figure 12 As indicated by the arrow in (a), the evaporator passes over the step between the ventilation surface and the lower part 33 of the sealing member 30, or falls from the drain response part 34 of the lower part 33, and after reaching the cover part 33a, it moves toward the drain hole 16 in the form of flowing on the surface of the cover part 33a, or seeps into the cover part 33a and moves toward the drain hole 16 within the cover part 33a.

[0051] To prevent condensate moving in this manner from forming droplets above the drain hole 16 in the vertical direction and falling into the drain hole 16, the sealing member 30 selected in this invention has a stepped condensate drop-promoting portion 36 and a condensate drop-prevention region 37 surrounded by the condensate drop-promoting portion 36. Hereinafter, a first and a second example will be described, focusing on the condensate drop-promoting portion 36 and the condensate drop-prevention region 37.

[0052] (First example of an embodiment of the present invention)

[0053] Regarding the first example of the condensate runoff promotion section 36 and the condensate runoff prevention area 37, the following was used: Figure 2 , Figure 3 , Figure 6 as well as Figure 7 Let's explain. In the first example, the condensate drip prevention area 37 is a cutout 38 where a portion of the cover portion 33a of the sealing member 30 is cut off. The condensate drip promotion portion 36 is a step formed by the cover portion 33a of the sealing member 30 and the cutout 38.

[0054] 38 incisions Figure 6 and Figure 7 As shown in (a), a circle (hereinafter referred to as the drainage hole projection circle) 16A that projects the opening circle of the drainage hole 16 upward in the vertical direction L1 is formed in the region when the surface of the cover portion 33a of the sealing member 30 is tilted at a predetermined angle R. It is located on one side of the cover portion 33a of the sealing member 30 in the length direction (in this embodiment, the inlet / outlet portion 26, 27 side).

[0055] Incision 38 Figure 7The cut 38 extends to the longitudinal end of the cover portion 33a from the perspective of ease of formation. It should be noted that the cut 38 may not extend to the longitudinal end of the cover portion 33a. In this case, the cut 38 is surrounded by the condensate drip-promoting portion 36 around its entire circumference.

[0056] Incision 38 Figure 7 The shape of the center, with reference lines C1 and C2 coinciding with the center of the projection circle 16A of the drain hole and the center of the ventilation direction of the evaporator 20, and extending along the length of the cover portion 33a of the sealing member 30, is a combination of a semi-circular portion and a quadrilateral portion, or a generally elliptical shape. When the surface of the cover portion 33a is inclined at a predetermined angle R and the projection circle 16A of the drain hole is housed within the cutout portion 38, the shortest distance D1 from the condensate dripping promotion portion 36 to the circumference of the projection circle 16A of the drain hole is the minimum distance that prevents condensate from dripping directly into the drain hole 16 even if it falls as water droplets from the condensate dripping promotion portion 36. This is preferably achieved at a point where the area of ​​the cutout portion 38 can be reduced. Moreover, as long as such a shortest distance D1 from the condensate dripping promotion portion 36 to the circumference of the projection circle 16A of the drain hole can be obtained, preventing water droplets from falling from the drain hole 16, the shape of the cutout portion 38 is not particularly limited.

[0057] Thus, the condensate dripping prevention area 37 is the cut-out portion 38, and the condensate dripping promotion portion 36 is the step between the sealing member 30 and the cut-out portion 38. Therefore, as... Figure 6 As shown, at a specified angle R, the surface of the cover portion 33a lowers towards the drain hole 16, as... Figure 7 As shown in (a), when the condensate moves along the length of the shroud portion 33a (in a direction perpendicular to the ventilation direction), the condensate... Figure 7 As shown in (b), the condensate is dispersed in the stepped portion of the condensate dripping promotion section 36. Therefore, even if it forms droplets, each droplet is small and therefore difficult to fall. When the condensate falls as droplets, it falls from the stepped portion between the sealing member 30 and the cutout portion 38, i.e., the condensate dripping promotion section 36, and therefore does not fall directly into the drain hole 16. Therefore, it is possible to prevent the condensate from forming droplets and falling directly into the drain hole 16, colliding with the cylindrical portion 17 or the drain hose 18, and causing abnormal noise.

[0058] exist Figure 7 In the diagram, the reference line C1, extending along the length of the cover portion 33a of the sealing member 30 from the center of the projected circle 16A through the drain hole, coincides with the reference line C2, extending along the length of the cover portion 33a of the sealing member 30 from the center of the ventilation direction of the evaporator 20. Conversely, depending on the location of the drain hole 16 at the bottom 15 of the housing 11, as shown... Figure 8As shown in (a), there is a situation where baseline C1 is offset from baseline C2 towards the upwind side in the width direction (ventilation direction) of evaporator 20, or as... Figure 8 As shown in (b), there is a situation where the baseline C1 is offset from the baseline C2 towards the downwind side of the width direction (ventilation direction) of the evaporator 20.

[0059] In this situation, the center of the cut 38 can be moved to align with the baseline C1. Thus, as... Figure 8 (a) Figure 8 As shown in (b), even if the drain hole 16 is positioned offset from the reference line C2 at the center of the width direction of the evaporator 20, the condensate drip prevention area 37 can be positioned above the drain hole 16 in the vertical direction L1.

[0060] (A variation of the first embodiment of the present invention)

[0061] exist Figure 9 In the middle, it means using Figure 7 The first example of the condensate drainage promoting part 36 and the cut part 38, as described above, is a modified example. Hereinafter, using... Figure 9 A variation of the first example will be described. It should be noted that for structures identical to those in the first example of the previous embodiment, the same reference numerals are used and their descriptions are omitted.

[0062] The cutout 38 is a roughly rectangular shape with reference lines C1 and C2 passing through its center. The condensate drip-promoting part 36 also has a corner 39 formed on the side opposite to the end side in the length direction of the lower surface 20a of the evaporator, consisting of a portion 39a extending along the ventilation direction of the air supply to the evaporator 20 and a portion 39b extending in a direction orthogonal to the ventilation direction of the air supply to the evaporator 20.

[0063] Depending on the tilt of vehicle 100, not only the evaporator 20, but also... Figure 6 As shown, there are also cases where the air is tilted in a direction perpendicular to the ventilation direction of the supplied air. Figure 9 This includes situations where the upstream side of the ventilation direction is higher and the downstream side is lower, or situations where the ventilation direction is tilted along the ventilation direction, or a combination of both. Even with this tilt in any direction, by having the condensate dripping promotion section 36 have a corner 39, water droplets collect at the corner 39, thereby further promoting the dripping of water droplets.

[0064] (Second example of an embodiment of the present invention)

[0065] use Figures 10 to 12A second example of the condensate dripping promotion section 36 and the condensate dripping prevention area 37 will be described. It should be noted that for structures identical to the first example of the previous embodiment, the same reference numerals are used, and their descriptions are omitted.

[0066] In the second example, the condensate drip prevention area 37 is the area where the secondary sealing member 40 is overlapped with the cover portion 33a of the sealing member 30 (the area of ​​the secondary sealing member 40 opposite to the inner side 15a of the bottom 15 of the housing 11). The condensate drip promotion section 36 is a step formed by the sealing member 30 and the secondary sealing member 40 overlapped with the cover portion 33a of the sealing member 30.

[0067] Sub-sealing component 40 Figure 11 and Figure 12 As shown in (a), the drain hole projection circle 16A, which projects the opening circle of the drain hole 16 upward in the vertical direction L1, is disposed in the region when the surface of the cover portion 33a of the sealing member 30 is tilted at a predetermined angle R. It is located near one side of the cover portion 33a of the sealing member 30 in the length direction (in this embodiment, the inlet / outlet portion 26, 27 side).

[0068] Sub-sealing component 40 in Figure 10 and Figure 11 The middle does not reach the longitudinal end of the cover portion 33a, and a step is also formed on the longitudinal end side of the cover portion 33a and between the cover portion 33a and the secondary sealing member 40.

[0069] The secondary sealing component 40 has a shape centered on the center of the projection circle 16A through the drain hole and the center of the ventilation direction of the evaporator 20, and the reference lines C1 and C2 extending along the length direction of the cover portion 33a of the sealing component 30. Figure 10 (c) Figure 12 It is a shape that combines a semi-circular part and a quadrilateral part, or a roughly elliptical shape.

[0070] When the surface of the cover portion 33a is inclined at a predetermined angle R and the projection circle 16A of the drain hole is located on the surface of the sub-sealing member 40 opposite to the bottom 15, the shortest distance D2 from the condensate dripping promotion portion 36 to the circumference of the projection circle 16A of the drain hole becomes the minimum distance that can prevent condensate from falling directly into the drain hole 16 even if it forms droplets and falls from the condensate dripping promotion portion 36. Therefore, it is preferable to reduce the size of the sub-sealing member 40. Furthermore, as long as the shortest distance D2 from the condensate dripping promotion portion 36 to the circumference of the projection circle 16A of the drain hole that can prevent droplets from falling from the drain hole 16 can be obtained in this way, the shape of the sub-sealing member 40 is not particularly limited.

[0071] The secondary sealing component 40 can be made of the same material as the sealing component 30, or it can be made of a different material than the sealing component 30, or it can be made of a material with lower water permeability than the sealing component 30. The secondary sealing component 40 may also have a skin layer. In this way, by making the secondary sealing component 40 have lower water permeability than the sealing component 30, it is possible to prevent condensate from seeping into the secondary sealing component 40 and falling off as water droplets from the surface of the secondary sealing component 40 opposite to the bottom 15.

[0072] Thus, the condensate dripping prevention area 37 is the area where the secondary sealing member 40 is overlapped in the cover portion 33a of the sealing member 30, and the condensate dripping promotion portion 36 is a step formed by the sealing member 30 and the secondary sealing member 40 overlapped in the cover portion 33a of the sealing member 30, thereby... Figure 11 As shown, under an inclination of a specified angle R, the surface of the cover portion 33a becomes lower toward the drain hole 16, although as... Figure 12 As shown in (a), the condensate moves along the length of the shroud 33a (in the direction perpendicular to the ventilation direction), but the condensate... Figure 12 As shown in (b), the condensate is dispersed in the stepped portion of the condensate dripping promotion section 36. Therefore, even if it forms droplets, each droplet is small and therefore difficult to fall. When the condensate falls as droplets, it falls from the stepped portion 33a of the sealing member 30 and the sub-sealing member 40, i.e., the condensate dripping promotion section 36, and therefore does not fall directly into the drain hole 16. Therefore, it is possible to prevent the condensate from falling directly into the drain hole 16 as droplets and colliding with the cylindrical portion 17 or the drain hose 18, thus preventing abnormal noise.

[0073] Explanation of reference numerals in the attached figures

[0074] 1. Air conditioning unit for vehicles;

[0075] 10. Air conditioning unit;

[0076] 11. Shell;

[0077] 15. Bottom;

[0078] 15a Inner surface;

[0079] 16. Drainage holes;

[0080] 20 Evaporator;

[0081] 20a Lower surface of evaporator;

[0082] 30 Sealing components;

[0083] 36. Condensate drainage facilitator;

[0084] 37. Condensation drip prevention area;

[0085] 38. Incision site;

[0086] 39 corners;

[0087] 39a The portion extending along the ventilation direction of the supplied air;

[0088] 39b is the portion that extends orthogonally to the ventilation direction of the supplied air;

[0089] 40 sets of sealing components;

[0090] 100 vehicles;

[0091] S internal space;

[0092] L1 is in the vertical direction;

[0093] The distance from the D1 cut to the drain hole.

Claims

1. An air conditioning unit (10) for a vehicle air conditioning system (1), wherein an evaporator (20) is housed in a housing (11) having an internal space (S) for airflow, and a drain hole (16) is provided at the bottom (15) of the housing (11) for discharging condensate generated in the evaporator (20) to the outside of the housing (11), the air conditioning unit (10) for the vehicle air conditioning system (1) is characterized in that, The evaporator (20) has a sealing member (30) on its lower surface (20a) which is opposite to the inner side (15a) of the bottom (15) and whose length direction is orthogonal to the ventilation direction of the supply air. The drain hole (16) is formed near the end of the lower surface (20a) of the evaporator in the length direction in the bottom (15). The sealing component (30) has a condensate drip-promoting section (36) formed in a stepped shape and a condensate drip-preventing area (37) surrounded by the condensate drip-promoting section (36). The condensate drip prevention area (37) is located above the drain hole (16) in the vertical direction (L1) when it is tilted (R) with one side lower than the other in the left-right and / or front-back directions of the vehicle (100) and the surface of the sealing member (30) lower toward the drain hole (16). in, The condensate drip prevention area (37) is the area where a secondary sealing member (40) is overlapped with the sealing member (30), and the condensate drip promotion section (36) is a step formed by the sealing member (30) and the secondary sealing member (40). The raw material of the secondary sealing component (40) is different from that of the sealing component (30).

2. The air conditioning unit (10) of the vehicle air conditioning device (1) according to claim 1, characterized in that, The condensate drip prevention area (37) is a cut-out portion (38) formed by cutting off a part of the sealing component (30). The condensate dripping promotion section (36) is a step formed by the sealing member (30) and the cut section (38).

3. The air conditioning unit (10) of the vehicle air conditioning device (1) according to claim 2, characterized in that, The cut (38) is formed at a position that is separated from the drain hole (16) by a constant distance (D1).

4. The air conditioning unit (10) of the vehicle air conditioning device (1) according to claim 2, characterized in that, The condensate dripping promotion section (36) also has a corner section (39), which is formed by a portion (39a) extending along the ventilation direction of the supply air flowing in the evaporator (20) and a portion (39b) extending orthogonally to the ventilation direction of the supply air.

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