JP2015217916A - Vehicular air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular air conditioner capable of preventing condensed water from a drain port of a drain pipe from being flowed by travel wind, flowing down along an outside surface of the drain pipe and intruding into a cabin.SOLUTION: A drain pipe 16 has a projection 164 which projects from a lower side section 162 to a vehicle lower side on a vehicle rear side of a drain port 163 and outside a cabin. Accordingly, even if discharged condensed water does not drop from the drain port 163 and flows down to the vehicle rear side on an outside surface 162a of the lower side section 162 due to a small quantity of the condensed water, for instance, the condensed water on the outside surface 162a is not flowed to the vehicle rear side of the projection 164 by travel wind. Therefore, the condensed water flowing out from the drain port 163 can be prevented from flowing down along the outside surface 162a of the lower side section 162 and intruding into the cabin by the projection 164.

Description

  The present invention relates to a structure of a vehicle air conditioner that performs air conditioning in a vehicle interior.

  Conventionally, as this type of vehicle air conditioner, there is one described in Patent Document 1, for example. The vehicle air conditioner described in Patent Document 1 includes a cooling heat exchanger for cooling conditioned air blown into the vehicle interior in an air conditioning case. And the drain pipe which drains the condensed water condensed with the heat exchanger for cooling to the exterior of a compartment is connected to the air-conditioning case.

  In the condensate drainage structure using this drain pipe, the drain pipe protrudes out of the passenger compartment from the air conditioning case, and the drain pipe is formed with a drain hole that opens to the vehicle lower side. Further, the front end of the drain pipe on the vehicle front side is closed. Furthermore, the protrusion part which protruded below to the position lower than a drainage hole is provided in the vehicle forward side rather than the drainage hole. Thereby, in the vehicle air conditioner of patent document 1, it is supposed that the drainage of condensed water can be improved.

JP 2008-290684 A

  However, in the condensed water drainage structure such as the vehicle air conditioner disclosed in Patent Document 1, when there is a small amount of drainage from the drainage hole, water droplets that have remained in the vicinity of the drainage hole are caused by traveling wind to be on the lower outer periphery of the drain pipe. May flow from the drainage hole to the rear side of the vehicle and enter the passenger compartment.

  In view of the above points, the present invention provides a vehicle air conditioner that can prevent condensed water from a drain outlet of a drain pipe from flowing into a traveling wind and entering the vehicle interior through the outer surface of the drain pipe. Objective.

In order to achieve the above object, in the invention of the vehicle air conditioner according to claim 1, a cooling heat exchanger (12) for cooling the conditioned air blown into the vehicle interior;
An air conditioning case (14) installed in the passenger compartment and containing a heat exchanger for cooling;
A drain pipe (16) provided so as to protrude out of the passenger compartment by protruding from the air conditioning case to the front side of the vehicle, and allowing the condensed water (Wc) condensed by the cooling heat exchanger to flow down toward the front side of the vehicle;
The drain pipe is formed with a drain outlet (163) that opens to the vehicle lower side outside the passenger compartment and drains the condensed water flowing down the drain pipe.
The drain pipe includes a lower side portion (162) that constitutes the vehicle lower side of the drain pipe, and a protrusion (164) that protrudes from the lower side portion to the vehicle lower side on the vehicle rear side and outside the passenger compartment from the drain port. It is characterized by having.

  According to the above-described invention, the drain pipe has the protrusion, and the protrusion protrudes from the lower side portion to the vehicle lower side outside the passenger compartment and out of the passenger compartment. Even if the outside of the lower side portion is transmitted to the rear side of the vehicle without running, it is possible to prevent the condensed water from flowing toward the rear side of the vehicle by the traveling wind. Therefore, it is possible to prevent the condensed water from the drain outlet of the drain pipe from flowing into the traveling wind and entering the vehicle interior along the outer surface of the drain pipe.

  In addition, each code | symbol in the bracket | parenthesis described in a claim and this column is an example which shows a corresponding relationship with the specific content as described in embodiment mentioned later.

It is sectional drawing which showed the structure of the heat exchanger 12 vicinity for cooling of the vehicle air conditioner 10 in 1st Embodiment. FIG. 2 is an enlarged detailed view of the drain pipe 16 of the first embodiment, and is a detailed view of a portion II in FIG. 1. FIG. 3 is a sectional view taken along line III-III in FIG. 2. FIG. 4 is a view in the direction of arrows IV in FIG. 2. It is a figure for demonstrating the subject solved in 1st Embodiment, Comprising: It is a figure corresponded in FIG. FIG. 3 is a detailed view corresponding to FIG. 2 in which the drain pipe 16 is enlarged in the vehicle air conditioner 10 of the second embodiment, and is a detailed view of a portion II in FIG. 1.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiments, the same or equivalent parts are denoted by the same reference numerals in the drawings.

(First embodiment)
FIG. 1 is a cross-sectional view showing a configuration in the vicinity of a cooling heat exchanger 12 of a vehicle air conditioner 10 in the present embodiment. Each arrow DR1, DR2 in FIG. 1 indicates a direction in a vehicle mounted state in which the vehicle air conditioner 10 is mounted on the vehicle. That is, the double-ended arrow DR1 in FIG. 1 indicates the vehicle longitudinal direction DR1, and the double-ended arrow DR2 indicates the vehicle vertical direction DR2.

  The vehicle air conditioner 10 is an air conditioner that air-conditions a vehicle interior, and includes a cooling heat exchanger 12, an air conditioning case 14, and a drain pipe 16, as shown in FIG. And the vehicle air conditioner 10 controls a blower (not shown) and an air flow, in addition to the cooling heat exchanger 12, the air conditioning case 14, and the drain pipe 16, in the same manner as the vehicle air conditioner of the cited document 1. For example, a plurality of doors are provided. These blowers, doors, and the like are the same as those provided in a general vehicle air conditioner.

  The air conditioning case 14 shown in FIG. 1 has an air passage 18 through which conditioned air is circulated, and is disposed inside the instrument panel at the front of the passenger compartment. Specifically, as shown in FIG. 1, the air conditioning case 14 is disposed on the vehicle rear side with respect to the partition plate 20 that separates the vehicle interior from the engine room outside the vehicle interior. In short, since the vehicle front side with respect to the partition plate 20 is the engine room and the vehicle rear side with respect to the partition plate 20 is the vehicle interior, the air conditioning case 14 is installed in the vehicle interior adjacent to the partition plate 20. The air conditioning case 14 is made of a resin molded by injection molding.

  The air conditioning case 14 houses the cooling heat exchanger 12. The cooling heat exchanger 12 is disposed in the air passage 18 on the downstream side of the blower that flows air to the air passage 18.

  The cooling heat exchanger 12 constitutes a part of the refrigeration cycle in which the refrigerant circulates, and is an evaporator that evaporates the refrigerant. The cooling heat exchanger 12 exchanges heat between the refrigerant flowing through the cooling heat exchanger 12 and the conditioned air blown into the vehicle interior through the air passage 18 and evaporates the refrigerant by the heat exchange. And cool the conditioned air.

  In FIG. 1, a lower space 22 is formed immediately below the cooling heat exchanger 12 in the air conditioning case 14. The lower space 22 has a substantially horizontal bottom surface 221 and constitutes a part of the air passage 18. The lower space 22 is located downstream of the blower and upstream of the cooling heat exchanger 12 in the air flow of the air passage 18. That is, the conditioned air blown out from the blower flows into the lower space 22 from the vehicle width direction (in other words, the vehicle left-right direction), and moves the cooling heat exchanger 12 from the vehicle lower side to the vehicle upper side as indicated by an arrow ARf. Pass through.

  The drain pipe 16 is a tubular member that discharges condensed water Wc condensed on the surface of the cooling heat exchanger 12 to the outside of the passenger compartment, and is made of rubber. FIG. 2 is an enlarged detailed view of the drain pipe 16 and is a detailed view of a portion II in FIG. As shown in FIGS. 1 and 2, the drain pipe 16 allows the condensed water Wc accumulated on the bottom surface 221 of the lower space 22 of the air conditioning case 14 to flow into the drain pipe 16 as indicated by an arrow AR1 (see FIG. 1). , Connected to the lower space 22. The drain pipe 16 is joined to the air conditioning case 14 so that water does not leak from the joint portion with the air conditioning case 14.

  Specifically, the drain pipe 16 is provided so as to protrude out of the passenger compartment by protruding from the air conditioning case 14 toward the front side of the vehicle. In order to arrange the drain pipe 16 in this way, a through hole 20a is formed in the partition plate 20, and the drain pipe 16 protrudes out of the passenger compartment through the through hole 20a. In order to prevent water or the like from entering the vehicle interior from the outside of the vehicle compartment through the through hole 20a, a sealing material 24 made of an elastic material such as urethane foam is provided. This sealing material 24 is pressed between them by the air-conditioning case 14 and the partition plate 20, and is arrange | positioned over the perimeter around the through-hole 20a.

  The drain pipe 16 is provided with a slight inclination with respect to the horizontal so that the vehicle front side is lower than the vehicle rear side. Therefore, the drain pipe 16 causes the condensed water Wc flowing from the lower space 22 of the air conditioning case 14 to flow down toward the vehicle front side.

  The axial end of the drain pipe 16 is closed. That is, the drain pipe 16 has a blocking wall 161 at its axial tip, and the blocking wall 161 causes the traveling wind Fair flowing from the vehicle front side to the vehicle rear side into the drain pipe 16 from the axial tip. Preventing direct intrusion.

  As shown in FIGS. 2 and 3, the drain pipe 16 has a cylindrical shape with its axial tip closed by a blocking wall 161. Accordingly, the lower side portion 162 constituting the vehicle lower side of the drain pipe 16 is curved so as to swell toward the vehicle lower side when viewed from the vehicle front-rear direction DR1, and the outer side surface 162a constituting the outer side of the lower side portion 162. Similarly, it is curved so as to swell toward the vehicle lower side. 3 is a cross-sectional view taken along the line III-III in FIG.

  Further, the drain pipe 16 is formed with a drain port 163 that opens to the vehicle lower side outside the passenger compartment. Specifically, the drain outlet 163 is formed in the lower side portion 162 of the drain pipe 16 and is disposed near the axial tip of the drain pipe 16, that is, near the axial tip. And the drain outlet 163 drains the condensed water Wc (refer FIG. 1) which flowed down the drain pipe 16 out of a vehicle interior. The opening shape of the drainage port 163 is, for example, a substantially rectangular shape as shown in FIG.

  The drain pipe 16 includes a protrusion 164 as shown in FIGS. The protrusion 164 is disposed outside the passenger compartment and on the vehicle rear side with respect to the drain port 163. The protrusion 164 protrudes from the lower side portion 162 to the vehicle lower side.

  The protrusion 164 is configured by a rib whose axial direction is the thickness direction of the drain pipe 16. The protrusion 164 is provided at a portion 162b located on the lowermost side of the vehicle on the outer side surface 162a of the lower side portion 162 that swells to the lower side of the vehicle in the cross section orthogonal to the axial direction of the drain pipe 16, for example, the cross section of FIG. ing.

  Further, the protrusion 164 has a lowermost end portion 164 a located on the vehicle lower side among the protrusions 164. The lowermost end 164a of the projection 164 is a vehicle compared to any part of the drain pipe 16 that constitutes the front side of the vehicle (specifically, the axial range WDf in FIG. 2) relative to the projection 164. Located on the lower side. In the present embodiment, as shown in FIG. 2, the lowermost end 164a of the protrusion 164 is a vehicle having a dimension L1 with respect to a portion 165 of the drain pipe 16 that is located on the vehicle front side and the vehicle lower side relative to the protrusion 164. Located on the lower side. Note that the lowest end portion 164a of the protrusion 164 is located on the vehicle lower side compared to any part of the axial direction range WDf in FIG. 2 is temporarily projected to the vehicle lower side in the axial range WDf. If there is a projecting part, it is located on the vehicle lower side than the projecting part.

  As shown in FIG. 3, the protrusion 164 is formed such that the lower edge 164b of the protrusion 164 is inclined with respect to the horizontal direction. And the lowest end part 164a of the protrusion 164 constitutes the lowermost part of the lower edge 164b.

  Next, the flow of the condensed water Wc generated in the cooling heat exchanger 12 will be described. The conditioned air flowing into the lower space 22 of the air conditioning case 14 from a blower (not shown) passes through the cooling heat exchanger 12 from the lower side to the upper side in FIG. At this time, the condensed water Wc is generated on the surface of the cooling heat exchanger 12 along with the cooling of the conditioned air, and the condensed water Wc is dripped from the cooling heat exchanger 12 by its own weight, and on the bottom surface 221 of the lower space 22. Can be stored.

  When the condensed water Wc is accumulated to some extent on the bottom surface 221, it flows out to the drain pipe 16 side. The condensed water Wc that has flowed out to the drain pipe 16 side flows down in the drain pipe 16 toward the vehicle front side, and the drain port 163 that opens downward near the front end of the drain pipe 16 on the vehicle front side (see FIG. 2). It is discharged outside, that is, outside the passenger compartment.

  Here, if the amount of condensed water Wc flowing out from the drain outlet 163 is a certain amount or more, the traveling wind Fair flows from the vehicle front side to the rear side in the vicinity of the drain outlet 163 as the vehicle travels forward. However, the condensed water Wc drops or flows down from the drain outlet 163 to the vehicle lower side. However, when the amount of condensed water Wc flowing out from the drain port 163 is small, the condensed water Wc remaining around the drain port 163 or around the drain port 163 is outside the lower side portion 162 as indicated by an arrow AR2. It may flow from the drain outlet 163 to the vehicle rear side through the side surface 162a (see FIG. 2). In that case, if the projection 164 is not provided as shown in FIG. 5, the condensed water Wc transmitted through the outer surface 162a reaches the sealing material 24 and deteriorates the sealing material 24. As a result, finally, Passes through the sealing material 24 and enters the vehicle interior. FIG. 5 is a diagram for explaining the problem solved in the present embodiment, and corresponds to FIG. 1 assuming that there is no protrusion 164.

  On the other hand, according to the present embodiment, as shown in FIG. 2, the drain pipe 16 has a protrusion 164, and the protrusion 164 is provided outside the passenger compartment. It protrudes from the part 162 to the vehicle lower side. Therefore, even if the outer surface 162a of the lower side portion 162 is transmitted to the vehicle rear side without dripping from the drain port 163 due to, for example, a small amount of the condensed water Wc shown in FIG. The condensate water Wc is not caused to flow further to the vehicle rear side than the protrusion 164 by the traveling wind Fair. For example, as shown in FIG. 1, the condensed water Wc adhering to the protrusion 164 drops at the position of the protrusion 164. Therefore, the protrusion 164 can prevent the condensed water Wc flowing out from the drain outlet 163 from entering the vehicle interior along the outer side surface 162a of the lower side portion 162.

  Further, as shown in FIG. 3, the protrusion 164 has a shape pointed downward, so that the area of the surface of the protrusion 164 facing the front side of the vehicle becomes narrower toward the vehicle lower side, and the condensed water adhering to the protrusion 164 Wc is easy to drip. That is, the protrusion 164 can promote the dripping of the condensed water Wc.

  Further, according to the present embodiment, the lowermost end portion 164a of the protrusion 164 is located on the vehicle lower side compared to any part of the drain pipe 16 that constitutes the front side of the vehicle with respect to the protrusion 164. The protrusion 164 is easily subjected to the traveling wind Fair. When the traveling wind Fair is blowing, the condensed water Wc is transmitted to the vehicle rear side on the outer side surface 162a of the lower side portion 162. Therefore, it becomes easy to promote dripping of the condensed water Wc from the protrusion 164.

  Further, according to the present embodiment, the outer surface 162a of the lower side portion 162 of the drain pipe 16 is curved so as to swell toward the vehicle lower side when viewed from the vehicle front-rear direction DR1, and the protrusion 164 is the vehicle front-rear direction DR1. Is provided at a portion 162b (see FIG. 3) located on the lowermost side of the vehicle in the outer side surface 162a in a cross section orthogonal to the above. Therefore, the condensed water Wc transmitted on the outer side surface 162 a by the traveling wind Fair tends to gather on the protrusion 164 in the circumferential direction of the drain pipe 16. Therefore, it is possible to improve the reliability of bypassing the projection 164 and preventing the condensed water Wc from flowing further to the vehicle rear side than the projection 164.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. In the present embodiment, differences from the first embodiment will be mainly described, and the same or equivalent parts as those in the first embodiment will be omitted or simplified.

  FIG. 6 is a detailed view corresponding to FIG. 2 in which the drain pipe 16 is enlarged in the vehicle air conditioner 10 of the present embodiment, and is a detailed view of a portion II in FIG. In the first embodiment described above, the protrusion 164 of the drain pipe 16 is arranged at a certain distance from the drain port 163 toward the vehicle rear side as shown in FIG. 2, but the vehicle air conditioner 10 of the present embodiment. That's not the case. Specifically, as shown in FIG. 6, the protrusion 164 is disposed adjacent to the drain outlet 163. In other words, the protrusion 164 constitutes a part of the peripheral edge 163a of the drain outlet 163 on the vehicle rear side.

  According to this embodiment, the same effects as those of the first embodiment described above can be obtained. Furthermore, according to the present embodiment, since the projection 164 of the drain pipe 16 is disposed adjacent to the drain port 163, the condensed water Wc flowing out from the drain port 163 travels along the outer side surface 162a of the lower side portion 162. The condensed water Wc can be dripped before starting. That is, the condensed water Wc can be dripped more reliably as compared with the configuration of the first embodiment as shown in FIG.

(Other embodiments)
(1) In each of the above-described embodiments, the lowermost end portion 164a of the protrusion 164 included in the drain pipe 16 is on the vehicle lower side compared to any part of the drain pipe 16 that constitutes the vehicle front side of the protrusion 164. However, it does not have to be located on the vehicle lower side as compared with any of the above-mentioned parts. For example, a protruding portion that protrudes toward the lower side of the vehicle is provided on the vehicle front side of the drain pipe 16 relative to the protrusion 164, and the protruding portion extends further to the lower side of the vehicle than the lowermost end portion 164 a of the protrusion 164. There is no problem.

  (2) In each of the above-described embodiments, the drain pipe 16 has a shape that extends straight. However, the drain pipe 16 does not have to be straight. For example, the drain pipe 16 may have a curved shape.

  (3) In the first embodiment described above, the protrusion 164 of the drain pipe 16 is partially provided on the lower side portion 162 as shown in FIG. 2 and FIG. As long as it protrudes downward, it may be extended to a portion other than the lower side portion 162. For example, the protrusion 164 may be an annular rib that protrudes like a bowl on the outer periphery of the drain pipe 16 and extends in the circumferential direction. The same applies to the second embodiment.

  (4) In each of the above-described embodiments, the drain pipe 16 is a pipe having a cylindrical shape. However, the drain pipe 16 does not have to be a cylindrical shape. For example, the drain pipe 16 is a pipe having a square cross section as in the vehicle air conditioner of Patent Document 1. There is no problem.

  (5) In each of the embodiments described above, the vehicle air conditioner 10 does not include a heater core that heats the conditioned air that has flowed out of the cooling heat exchanger 12. For example, the cooling heat exchanger in the air conditioning case 14 The heater core may be provided on the downstream side of the 12 air flows.

  In addition, this invention is not limited to above-described embodiment, In the range described in the claim, it can change suitably. In each of the above-described embodiments, it is needless to say that elements constituting the embodiment are not necessarily essential unless explicitly stated as essential and clearly considered essential in principle. Yes. Further, in each of the above embodiments, when numerical values such as the number, numerical value, quantity, range, etc. of the constituent elements of the embodiment are mentioned, it is clearly limited to a specific number when clearly indicated as essential and in principle. The number is not limited to the specific number except for the case. In each of the above embodiments, when referring to the material, shape, positional relationship, etc. of the constituent elements, etc., unless otherwise specified, or in principle limited to a specific material, shape, positional relationship, etc. The material, shape, positional relationship, etc. are not limited.

DESCRIPTION OF SYMBOLS 10 Vehicle air conditioner 12 Cooling heat exchanger 14 Air conditioning case 16 Drain pipe 162 Lower side part 163 Drain outlet 164 Protrusion Wc Condensed water

Claims (4)

A cooling heat exchanger (12) for cooling the conditioned air blown into the passenger compartment;
An air-conditioning case (14) installed in the passenger compartment and containing the cooling heat exchanger;
A drain pipe (16) provided so as to protrude out of the passenger compartment by protruding from the air conditioning case to the front side of the vehicle, and flowing down the condensed water (Wc) condensed by the cooling heat exchanger toward the front side of the vehicle; Prepared,
The drain pipe is formed with a drain outlet (163) that opens to the vehicle lower side outside the passenger compartment and drains the condensed water that has flowed down the drain pipe.
The drain pipe includes a lower side portion (162) that constitutes the vehicle lower side of the drain pipe, and a protrusion that protrudes from the lower side portion to the vehicle lower side outside the passenger compartment and outside the passenger compartment. (164). The vehicle air conditioner characterized by the above-mentioned. The protrusion has a lowermost end portion (164a) positioned on the vehicle lower side among the protrusions,
2. The vehicle air conditioner according to claim 1, wherein the lowermost end portion is located on the vehicle lower side compared to any portion of the drain pipe that constitutes the vehicle front side of the protrusion. .   The vehicle air conditioner according to claim 1, wherein the protrusion is disposed adjacent to the drain port. The lower side portion of the drain pipe has an outer surface (162a) that swells toward the vehicle lower side when viewed from the vehicle longitudinal direction (DR1).
The said protrusion is provided in the site | part (162b) located in the vehicle lower side among this outer surface in the cross section orthogonal to a vehicle front-back direction, The one of Claim 1 thru | or 3 characterized by the above-mentioned. Vehicle air conditioner.

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