JP2008110762A - Overhead type vehicular air-conditioning unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an overhead type vehicular air-conditioning unit capable of balancing a secure drain water treatment with reduction of the thickness and size of the air-conditioning unit. <P>SOLUTION: This overhead type vehicular air-conditioning unit is composed by incorporating an evaporator 7 and a cross-flow fan 8A in an air-conditioning casing 31, and used by being installed in a ceiling part in a vehicle interior. In a first drain passage 57 formed on a heat exchanger installation surface of the air-conditioning unit and guiding heat exchanger drain water to a drain outlet, a partitioning rib 61 reducing the thickness of the passage is arranged. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an overhead type air conditioning unit for a vehicle, and more particularly to a technique for improving the in-vehicle performance by reducing the shape of the entire air conditioning unit.

  Conventionally, in vehicles such as so-called one-box cars and limousines, in addition to the air conditioning units installed in front of the driver's seat and passenger seat, dedicated for rear seats such as the second row and the third row. An air conditioning unit may be provided. As shown in FIGS. 14 and 15, many such rear seat air conditioning units are installed on the ceiling of the vehicle interior, and are generally called overhead type vehicle air conditioning units.

A conventional overhead vehicle air conditioning unit will be briefly described below with reference to FIGS.
14 and 15 show an example of an overhead type vehicle air conditioning unit (hereinafter referred to as a rear air conditioning unit) installed in a sedan type passenger car, and reference numeral 1 in the drawing is a rear air conditioning unit. In this case, the high-temperature and high-pressure refrigerant compressed by the compressor is cooled by the condenser and supplied to the rear air conditioning unit 1 and a front air conditioning unit (not shown).

FIG. 15 shows the rear air-conditioning unit 1 installed on the ceiling of the passenger compartment as viewed from the rear side of the passenger compartment. The rear air conditioning unit 1 is fixed to the vehicle body constituting member 3 at both side ends using brackets 2. Actually, in order to prevent the mounting member such as the bracket 2 from being exposed to the vehicle interior, a measure such as covering with an appropriate cover member (not shown) is taken.
Further, as shown in FIGS. 16 and 17, the rear air conditioning unit 1 is provided with reinforcing members 5 and 5 in the vehicle width direction provided on the vehicle compartment side of the roof panel 4 in order to minimize the protruding amount into the vehicle interior. It has been devised such as putting it in between. The main purpose of this is to provide a comfortable cabin space by ensuring as much passenger overhead space as possible under limited conditions.

Next, the configuration of the conventional rear air conditioning unit 1 will be briefly described with reference to FIGS.
The rear air-conditioning unit 1 sucks the air in the vehicle interior (inside air) into the casing 6 through an evaporator 7 that is a heat exchanger for cooling, and passes the air through the evaporator 7 to blow out the heat-conditioned air to the vehicle interior. And a blower 8. In addition, the code | symbol 9 in a figure is a suction inlet and 10 is a blower outlet.
In such an air conditioning unit 1, the casing 6 is divided into upper and lower parts (6a, 6b), and as the blower 8, as shown in FIG. 19, a cross flow fan 8A unit is incorporated, as shown in FIG. In some cases, a unit of the sirocco fan 8B is incorporated.

Further, since the rear air conditioning unit 1 described above is installed on the ceiling in the passenger compartment and incorporates an evaporator 7 for discharging drain water, this drain water drainage treatment becomes important.
FIGS. 21 and 22 are views for explaining the conventional drain water treatment. FIG. 21A is a plan view showing a heat exchanger installation surface of the lower casing 6b, and FIG. 21B is a front view of the lower casing 6b. FIG. In this case, basically, drain water is guided to the drain ports 11 provided on both sides and drained out of the vehicle through a drain hose (not shown) connected to the drain ports 11. Accordingly, as shown in FIG. 21B, the lower casing 6b has a shape curved in a convex shape so that the center portion is the highest and both sides are the lowest. In the lower casing 6b, a heat exchanger installation surface on the vehicle front side that functions as a drain pan and a blower installation surface on the vehicle rear side are integrated.

Furthermore, since the above-described rear air conditioning unit 1 is also used during traveling of the vehicle and drain water is discharged, it is necessary to perform drainage treatment in consideration of all situations that occur during traveling. Specifically, drain water leaks into the passenger compartment even when moving up and down a slope, moving in the front-rear direction of drain water caused by acceleration and deceleration, or moving in the left-right direction of drain water during turning. It is necessary not to put it out. Therefore, in the conventional rear air conditioning unit 1, as shown in FIGS. 21A and 22, ribs 12, 13, 14, 15 extending in the vehicle width direction and ribs 16, 17 in the vehicle front-rear direction are provided in the lower casing 6b. This is dealt with by forming four drainage channels 18, 19, 20, and 21.
In addition, the code | symbol 22 in a figure is an insulation member installed between the lower case 6a and the evaporator 7 for the purpose of heat insulation and protection of the evaporator 7. FIG.
The rib 12 located at the foremost end constitutes a part of the front surface of the casing 6, and a suction port 9 is opened above the rib 12.

By the way, since the rear air conditioning unit 1 described above is installed on the ceiling in the passenger compartment, it is required to be miniaturized as thin as possible so as to ensure as much space as possible on the passenger's head. Such a demand is particularly strong in a sedan type passenger car having a vehicle height lower than that of a one-box car because the vehicle interior space is also low.
However, in the conventional rear air-conditioning unit 1, the blower 8 itself incorporated in the casing 6 is provided with a dedicated casing 8a (see FIG. 18). It was.

Further, from the viewpoint of drain water treatment, in order to prevent the drain water that jumps forward due to inertia such as rapid deceleration, a rib that forms a part of the casing 6 is positioned at the foremost end. It is desirable to make 12 as high as possible.
However, since the thickness of the rear air-conditioning unit 1 is limited due to the problem of the installation position as described above, if the rib 12 is increased, the opening area of the suction port 9 is reduced by that amount, so the ventilation resistance is large. The problem of becoming will arise. Such an increase in ventilation resistance increases the operating noise of the rear air conditioning unit 1 and further increases the power consumption of the blower 8.

  Therefore, the present invention has been made in view of the above circumstances, and an object of the present invention is to provide an overhead type vehicle air conditioning unit that achieves both reliable drain water treatment and thinning and downsizing of the rear air conditioning unit. Is.

The present invention employs the following means in order to solve the above problems.
The overhead type vehicle air conditioning unit according to claim 1 is an overhead type vehicle air conditioning unit in which a cooling heat exchanger and a blower are incorporated in an air conditioning casing, and is used by being installed on a ceiling portion in a passenger compartment. The partition rib for narrowing the channel width is provided in the drainage channel for guiding the heat exchanger drain water formed on the heat exchanger installation surface of the air conditioning unit to the drain port.

  According to such an overhead type air conditioning unit for a vehicle, the distance that the heat exchanger drain water accumulated in the drainage channel moves in the front-rear direction by inertia force such as acceleration / deceleration can be shortened. It becomes difficult to leak.

  The overhead type vehicle air conditioning unit according to claim 2 is an overhead type vehicle air conditioning unit in which a cooling heat exchanger and a blower are incorporated in an air conditioning casing and installed on a ceiling portion of a passenger compartment. The first rib formed by the front end wall of the air conditioning casing on the heat exchanger installation surface of the air conditioning casing, and the second and third ribs extending in the vehicle width direction before and after the heat exchanger, respectively. And a fourth rib for partitioning between the heat exchanger installation surface and the rear fan installation surface, a first drainage channel between the first rib and the second rib, A second drainage channel between the second rib and the front surface of the heat exchanger; a third drainage channel between the rear surface of the heat exchanger and the third rib; and the third rib Forming a fourth drainage flow path between the first rib and the fourth rib Guides the emissions water drain outlet on both sides and is characterized in that a partition rib narrowing the flow path width in the first drain passage. In this case, the heat exchanger is installed on a heat exchanger installation surface of the air conditioning casing via an insulation member, and between the insulation member end surface and the wall the second rib and the third rib. It is preferable that the second drainage channel and the third drainage channel are formed by providing a gap in the first and second drainage channels. Preferably, the second rib approaches the first rib on both sides and is in the center. It is preferable that the partition ribs are provided so as to be separated from each other, and the partition ribs are disposed in a central portion of the first flow path.

  According to such an overhead type vehicle air conditioning unit, since the partition plate is provided in the first drainage channel located at the foremost end, the heat exchanger drain water accumulated in the first drainage channel is accelerated or decelerated. The moving distance in the front-rear direction can be shortened by the inertia force. For this reason, it is possible to prevent the heat exchanger drain water from jumping over the first drainage channel and flowing out of the air conditioning unit.

The overhead vehicle air conditioner according to the present invention has the following effects.
(1) Since the partition rib is provided in the drainage channel to narrow the channel width, it is possible to prevent drain water moving by the inertial force from being accelerated and flowing out so as to jump over the rib. If this is applied to the first drainage channel close to the suction port, the lower casing can be made thin to reduce the size of the rear air conditioning unit, and the suction port can be enlarged to reduce operating noise and power consumption. it can.
(2) Since the rear air-conditioning unit has been made thinner and smaller, it is possible to provide a good vehicle interior space even if it is installed in a sedan type passenger car that cannot take a height in the vehicle interior.

Hereinafter, an embodiment of an overhead type air conditioning unit for a vehicle according to the present invention will be described with reference to the drawings.
1 and 2, reference numeral 7 is an evaporator (heat exchanger), 8A is a cross flow fan (blower), 30 is an overhead air conditioning unit (hereinafter referred to as a rear air conditioning unit), 31 is an air conditioning casing, and 32 is A suction port, 33 is a blow-out port, 34 is a drain port, 40 is an upper casing of the air-conditioning casing 31 that is divided into two vertically, and 50 is a lower casing.
The rear air conditioning unit 30 includes an evaporator 7 and a cross flow fan 8A incorporated in an air conditioning casing 31. By operating the cross flow fan 8A, the inside air is sucked from a suction port 32 in front of the vehicle and passes through the evaporator 7. After exchanging heat with a refrigerant supplied from a refrigerant system, which will be described later, it has a cooling function of blowing conditioned air into the passenger compartment from the outlet 33 at the rear of the vehicle.
Here, the vehicle front means the front part of the vehicle body in the vehicle forward direction, and the vehicle rear means the rear part of the vehicle body.

3 to 6 show a configuration example of the lower casing 50.
In the plan view of FIG. 3, the lower casing 50 includes a heat exchanger installation surface 51 on the front side of the vehicle body and a blower installation surface 52 on the rear side of the vehicle body.
One heat exchanger installation surface 51 is a region where the evaporator 7 is installed via the insulation member 64, and has a function as a drain pan for draining drain water discharged from the evaporator 7. Also in this case, since the water is drained from the drain ports 34 provided on both sides, the heat exchanger installation surface 51 is at the center in the vehicle width direction as shown in the front view (viewed from the rear of the vehicle) shown in FIG. Is curved so as to be the highest.

Further, on the heat exchanger installation surface 51, the front end wall of the lower casing 50 is used as a first rib (hereinafter referred to as a first rib) 53, and a second rib (hereinafter referred to as a second rib) is sequentially arranged toward the rear side of the vehicle body. 54, a third rib (hereinafter referred to as a third rib) 55 and a fourth rib (hereinafter referred to as a fourth rib) 56 are provided. These ribs 53, 54, 55, and 56 all extend in the vehicle width direction. Among these, the 2nd rib 54 is curved and provided so that it may approach the 1st rib 53 on both sides, and may separate in the center part, and the evaporator 7 is installed between the 2nd rib 54 and the 3rd rib 55. . Both the second rib 54 and the third rib 55 are provided to the vicinity of both sides. The fourth rib 56 has a function of partitioning between the heat exchanger installation surface 51 and the blower installation surface 52 by connecting both ends thereof to both sides.
Reference numerals 62 and 63 in the figure are water guide ribs in the vehicle front-rear direction that guide the drain water flowing on both sides of the heat exchanger installation surface 51 to the drain ports 34 arranged in the front and rear directions. Can be guided smoothly. Note that both ends of the second rib 54 and the third rib 55 described above are not connected to the first rib 53, the fourth rib 56, and the water guiding ribs 62 and 63, and are openings serving as flow paths leading to the drain port 34. The part is formed.

  Then, by these ribs and the evaporator 7, as shown in FIGS. 2 and 11, a first drainage channel (hereinafter referred to as a first drainage channel) 57 is provided between the first rib 53 and the second rib 54. However, a second drainage channel (hereinafter referred to as a second drainage channel) 58 is provided between the second rib 54 and the front surface of the evaporator 7, and a third drainage is provided between the rear surface of the evaporator 7 and the third rib 55. A flow path (hereinafter, third drainage flow path) 59 is formed, and a fourth drainage flow path (hereinafter, fourth drainage flow path) 60 is formed between the third rib 55 and the fourth rib 56. Each of these drainage channels has a function of guiding drain water discharged from the evaporator 7 to drainage ports 34 on both sides. The first drainage channel 57 is provided with partition ribs 61 for the purpose of narrowing the channel width. The partition rib 61 is provided in the central portion where the flow path width is wide. As a result, the central portion of the first drainage flow path 57 is divided into a front flow path 57a on the front side of the vehicle and a rear flow path 57b on the rear side. Divided.

  The blower installation surface 52 is an area where the cross flow fan 8A is installed. In this embodiment, a pair of left and right cross flow fans each having a drive motor attached thereto is installed. As shown in the side view shown in FIG. 5 and the cross-sectional view shown in FIG. 6, the lower casing of the cross flow fan 8A is integrally formed on the blower installation surface 52, and a portion indicated by reference numeral 65 is a stabilizer.

7 to 10 show the upper casing 40. The upper casing 40 is combined with the lower casing 50 described above to form an air conditioning casing 31.
Similar to the lower casing 50 described above, the upper casing 40 also includes a heat exchanger installation area 41 and a blower installation area 42. One heat exchanger installation area 41 has a function of holding down and supporting the evaporator 7 installed on the heat exchanger installation surface 51 of the lower casing 50 from above. A fan casing portion 43 that forms a casing of the cross flow fan 8A is integrally formed in the blower installation region 42 together with a stabilizer 65 provided on the blower installation surface 52 of the lower casing 50.

  Usually, the evaporator 7 is installed on the insulation member 64 laid on the heat exchanger installation surface 51 for the purpose of heat insulation and protection of the evaporator. The insulation member 64 may be spread over the entire surface from the second rib 54 to the third rib 55, but in the embodiment of the present invention, the insulation member 64 includes the front and rear second ribs 54 and third ribs 55. Are provided so as to form a gap between them. As a result, the second deeper by the thickness of the insulation member 64 is formed between the front end surface of the insulation member 64 and the second rib 54 and between the rear end surface of the insulation member 64 and the third rib 55. A drainage channel 58 and a third drainage channel 59 are formed. This means that if the same drainage performance is obtained, the rib can be lowered by the thickness of the insulation member 64, which becomes a factor for reducing the thickness of the air conditioning casing 31.

Next, the configuration of the refrigerant system 80 will be described with reference to FIG. The refrigerant system 80 supplies a low-temperature and low-pressure liquid refrigerant to the evaporator 7, and includes a compressor 81, a condenser 82, and an expansion valve 83.
The compressor 81 compresses the low-temperature and low-pressure gas refrigerant vaporized by taking the heat in the vehicle compartment by the evaporator 7 and sends it to the condenser 82 as a high-temperature and high-pressure gas refrigerant. In the case of an automotive air conditioner, the compressor 81 receives a driving force from a normal engine via a belt and a clutch.
The condenser 82 is normally disposed in the front part of the engine room, and cools the high-temperature and high-pressure gas refrigerant supplied from the compressor 81 with the outside air to condense and liquefy the gaseous refrigerant. In the case of the rear air conditioning unit 30, a dedicated capacitor may be provided separately from the front air conditioning unit.
The refrigerant liquefied in this way is sent to a receiver (not shown) and separated into gas and liquid, and then sent to the expansion valve 83 as a high-temperature and high-pressure liquid refrigerant. The expansion valve 83 decompresses and expands the high-temperature and high-pressure liquid refrigerant to form a low-temperature and low-pressure liquid (mist-like) refrigerant and supplies the refrigerant to the evaporator 7.
Reference numeral 84 denotes a control unit that controls the temperature setting and the air flow rate in the air conditioner.

  FIG. 13 is an exploded perspective view showing an example of a structure for mounting the above-described rear air conditioning unit 30 to a vehicle. In FIG. 13, reference numeral 85 denotes a pair of left and right body fixing brackets, and 86 denotes a drain outlet 34. A drain hose that is connected and discharges drain water to the outside of the vehicle, 87 is a refrigerant pipe for circulating the refrigerant in the refrigerant system 80, 88 is a cover that covers the drain hose 86 and the refrigerant pipe 87 so as not to be exposed to the vehicle interior, and 89 is a bracket 85 Is a cover that covers the vehicle so that it is not exposed to the interior of the vehicle.

Hereinafter, the operation of the rear air conditioning unit 30 having the above-described configuration will be described.
As described above, in the present invention, the casing of the cross flow fan 8A is integrally formed with the air conditioning casing 31, but this eliminates the need for the casing of the cross flow fan 8A, thereby reducing the number of parts and the preparation costs of the molds and the like. In addition to cost reduction, the weight of the unit can be reduced. If the casing of the cross flow fan 8A is not necessary, the thickness of the rear air conditioning unit 30 can be reduced by about 5 to 8 mm. In the present invention, the cross flow fan 8A is used as a blower. This is advantageous in reducing the size and size of the rear air conditioning unit 30. The cross flow fan 8A also has an advantage that noise during operation is low.

  By the way, the accuracy of the casing, in particular, the stabilizer 65 and the fan casing portion 43 is important for securing the performance of the cross flow fan 8A. That is, in the configuration in which the blower unit having the conventional casing is incorporated, after adjustment at the time of assembling the blower unit itself, further adjustment is required when it is incorporated into the rear air conditioning unit 30, and the assembly work is troublesome. However, the structure of the present invention requires only one adjustment, which is simplified correspondingly and can reduce the number of assembly steps as a whole.

  Next, drainage of drain water discharged from the evaporator 7 will be described. After the drain water falls from the evaporator 7, it flows to the left and right drain ports 34 through drain channels 57, 58, 59, 60 in which both sides are set low. However, in a running vehicle, the drain water accumulated in the drainage flow path may be forced to move in the front-rear direction due to sudden braking or sudden start, or may be forced to move in the left-right direction due to sudden turning. is there.

Among these, when the drain water is forced to move in the front-rear direction, the drain water may jump out over the ribs forming the flow path. In such a phenomenon, if the flow path width (width in the front-rear direction) is larger under the same conditions, the movement speed of the drain water is accelerated and jumps over easily. In particular, when such a phenomenon occurs in the first drainage channel 57 close to the suction port 32, a serious problem of flowing out from the blowout port 32 into the vehicle interior occurs. Therefore, partition ribs 61 are provided in the first drainage channel 57 to narrow the channel width. In this embodiment, the second rib 54 is curved in order to perform smooth drainage, and thereby the channel width is widened and enlarged in the central portion of the first drainage channel 57. 61 is provided.
As a result, the first drain channel 57 is divided into the front channel 57a and the rear channel 57b, and the movement of the drain water in the front-rear direction is performed within a narrow range. For this reason, acceleration of the movement of the drain water can be suppressed and the drain water is less likely to flow out, so that the height of the first rib 53 positioned in front of the drain water can be set low. Therefore, the rear air conditioning unit 30 can be reduced in size by the amount that the first rib 53 is lowered, and the suction port 32 can be enlarged by the amount that the first rib 53 is lowered. .
Such partition rib 61 can also be applied to other drainage channels. For example, the partition rib 61 is applied when the fourth drainage channel is widened so that the drain water does not jump into the blower region 52 and flow into it. Alternatively, the present invention may be applied to drain water movement not only in the front-rear direction but also in the vehicle width direction.

The second drainage channel 58 and the third drainage channel 59 are formed as a drainage channel by forming a gap between the insulation member 64 and the front and rear second ribs 54 and third ribs 55. . For this reason, since the substantial depth of the drainage channel is increased by an amount corresponding to the thickness of the insulation member 64, the height of the second rib 54 and the third rib 55 is higher than when the insulation member 64 is laid on the entire surface. It is possible to reduce the thickness. This can be used to reduce the thickness of the lower casing 50 that functions as a drain pan. As a result, the rear air conditioning unit 30 can be made thinner and smaller.
In addition, it is expected that the thickness of the rear air conditioning unit 30 can be reduced by about 30 mm by devising the drain water drainage channel described above.

  In the embodiment described so far, the cross flow fan 8A is employed as the blower, but the drain water drainage treatment can also be applied to a rear air conditioning unit employing a sirocco fan. Moreover, it is not always necessary to provide a rib for forming the drainage channel, and an appropriate wall surface may be used effectively.

  The first reference example of the overhead type vehicle air conditioning unit described above is an overhead type vehicle air conditioning unit in which a cooling heat exchanger and a blower are incorporated in an air conditioning casing and installed on the ceiling of a vehicle interior. And the casing of the said air blower was integrally molded in the said air-conditioning casing. In this case, it is preferable that the blower is a cross flow fan, and the air-conditioning casing is preferably divided into two in the vertical direction, and includes a stabilizer portion provided in the lower casing and a fan casing portion provided in the upper casing. A casing of the cross flow fan may be configured.

  According to the first reference example of such an overhead type vehicle air conditioning unit, since the casing of the blower is integrated with the air conditioning casing, the air conditioning unit can be downsized and the number of parts can be reduced.

  The second reference example of the overhead type vehicle air conditioning unit described above is an overhead type vehicle air conditioning unit in which a cooling heat exchanger and a blower are incorporated in an air conditioning casing and installed on the ceiling of a vehicle interior. The heat exchanger is installed on the heat exchanger installation surface of the air conditioning casing via an insulation member, and a vertical wall surface extending in the vehicle width direction before and after the heat exchanger is formed, A drainage flow path is formed between the wall surface and the end face of the insulation member to guide the heat exchanger drain water to the drain outlets on both sides. In this case, the wall surface may be formed by a rib.

  According to the second reference example of such an overhead type vehicle air conditioning unit, the drainage channel can be deepened by the thickness of the insulation member, so that the wall surface can be lowered. Therefore, it can contribute to making the air conditioning unit thinner.

According to the first reference example and the second reference example described above, the following effects are obtained.
(1) Since a cross flow fan is used as the blower and the casing of the cross flow fan is formed integrally with the air conditioning casing, it is possible to reduce the number of parts and the preparation costs of the mold, etc. Play. Moreover, the integration of the casing is also effective in reducing the weight and assembling of the rear air conditioning unit.
(2) By integrating the casings described above, the space can be saved as much as the casing of the cross flow fan is eliminated, so that the rear air conditioning unit can be made thinner and smaller.
(3) By forming the drainage flow path with the insulation member and the front and rear ribs, the drainage flow path becomes deeper by the thickness of the insulation member, so that the height of the rib can be reduced. Therefore, the rear air conditioning unit can be made thinner and smaller as the rib becomes lower.

It is a partial section perspective view showing one embodiment of an overhead type air-conditioning unit for vehicles concerning the present invention. It is AA sectional drawing of FIG. It is a top view which shows the lower casing of the overhead type vehicle air conditioner unit shown in FIG. FIG. 4 is a front view of FIG. 3 (viewed from the rear of the vehicle). FIG. 4 is a left side view of FIG. 3. It is BB sectional drawing of FIG. It is a top view which shows the upper casing of the overhead type | formula air conditioning unit shown in FIG. FIG. 8 is a front view of FIG. 7 (viewed from the rear of the vehicle). FIG. 8 is a left side view of FIG. 7. It is CC sectional drawing of FIG. It is an expanded sectional view of the drainage channel part in the present invention. 1 is a system diagram illustrating an overall configuration of a vehicle air conditioner. It is a disassembled perspective view which shows the attachment structural example of an overhead type vehicle air conditioner unit. It is a figure which shows the overhead type vehicle air conditioner unit attached to the sedan type passenger car. It is the figure which looked at the overhead type | formula air conditioning unit of FIG. 14 from the vehicle interior back. It is a top view which shows the attachment position of an overhead type vehicle air conditioner unit. It is DD sectional drawing of FIG. It is sectional drawing which shows the conventional overhead type vehicle air conditioner unit. It is a disassembled perspective view of the main components which shows the conventional overhead type | formula air conditioning unit which employ | adopted the crossflow fan. It is a disassembled perspective view of the main components which shows the conventional overhead type | formula air conditioning unit which employ | adopted the sirocco fan. It is a figure which shows the conventional lower casing, (a) is a top view of a heat exchanger installation area | region, (b) is a front view. It is sectional drawing of Fig.21 (a), (a) is EE sectional drawing, (b) is FF sectional drawing, (c) is GG sectional drawing.

Explanation of symbols

30 Rear air conditioning unit (overhead vehicle air conditioning unit)
DESCRIPTION OF SYMBOLS 31 Air conditioning casing 32 Intake port 33 Outlet 34 Drain outlet 40 Upper casing 41 Heat exchanger installation area 42 Blower installation area 43 Fan casing part 50 Lower casing 51 Heat exchanger installation surface 52 Blower installation surface 53 1st rib 54 2nd rib 55 3rd rib 56 4th rib 57 1st drainage flow path 57a Front flow path 57b Rear flow path 58 2nd drainage flow path 59 3rd drainage flow path 60 4th drainage flow path 61 Partition rib 62,63 Water guide rib

Claims (4)

An overhead type air conditioning unit for a vehicle in which a heat exchanger for cooling and a blower are incorporated in an air conditioning casing and installed on the ceiling of a vehicle interior,
An overhead type air conditioning unit for a vehicle, wherein a partition rib for narrowing the channel width is provided in a drainage channel that guides heat exchanger drain water formed on a heat exchanger installation surface of the air conditioning unit to a drainage port. An overhead type air conditioning unit for a vehicle in which a heat exchanger for cooling and a blower are incorporated in an air conditioning casing and installed on the ceiling of a vehicle interior,
A first rib formed by a front end wall of the air conditioning casing on the heat exchanger installation surface of the air conditioning casing; and second and third ribs extending in the vehicle width direction before and after the heat exchanger; A fourth rib for partitioning between the heat exchanger installation surface and the rear fan installation surface; a first drainage channel between the first rib and the second rib; A second drainage channel between the second rib and the front surface of the heat exchanger, a third drainage channel between the rear surface of the heat exchanger and the third rib, and the third rib and the A fourth drainage channel between the fourth ribs is formed to guide the heat exchanger drain water to the drain outlets on both sides, and a partition rib for narrowing the channel width is provided in the first drainage channel. An overhead type air conditioning unit for vehicles.   The heat exchanger is installed on a heat exchanger installation surface of the air conditioning casing via an insulation member, and a gap is provided between the end surface of the insulation member and the second rib and the third rib. The overhead type vehicle air conditioning unit according to claim 2, wherein the second drainage channel and the third drainage channel are formed. The second rib is provided to be curved so as to approach the first rib on both sides and to be separated from the central portion, and the partition rib is disposed in the central portion of the first drainage flow path. The overhead type vehicle air conditioning unit according to claim 2, wherein the overhead type air conditioning unit is used.

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