JP3232913B2 - Automotive air conditioners - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for automobiles, and more particularly to an air conditioner unit in which air blown from a blower is introduced from below, and an air conditioner heat exchanger is installed at an almost horizontal angle on the downstream side. Related to the layout.

[0002]

2. Description of the Related Art Conventionally, air conditioner units for automobiles, which are generally provided, are often of the so-called horizontal type. Figure 1 shows this type
As shown in FIG. 4, the blower unit 1, the cooler unit 2a, and the heater unit 2b are arranged in a straight line in the vehicle lateral direction (width direction).

FIG. 15 shows a state in which the units 1, 2a, and 2b are mounted on a vehicle in an instrument panel P substantially halfway in a vehicle width direction (a front portion on a passenger seat side). As a result, the units 1, 2a and 2b occupy a very large part of the space inside the instrument panel P.

[0004]

However, in recent years, the number of in-vehicle computers has increased due to the development of electronics in vehicles.
Due to the increase in size, installation of a CD changer in the cabin, and an increase in the mounting rate of the airbag on the passenger seat, the space for installing the air conditioner units (1, 2a, 2b) in the instrument panel P has been reduced. It is becoming increasingly difficult to install air conditioner units in vehicles.

Further, as shown in FIG. 16, an air conditioner unit 2 in which a cooler evaporator 21 and a heater core 22 are arranged in the front-rear direction of the vehicle is installed in the center of the vehicle, and only the blower 1 is moved in the width direction from the center of the vehicle. There is also a center-type structure that is offset from the center. According to the layout of the center-placed type, since the cooler evaporator 21 and the heater core 22 are concentrated and installed in the center of the vehicle, it is easy to secure a space in the instrument panel P. An air conditioning heat exchanger (evaporator 21,
Since the heater core 22) is arranged so as to be substantially vertical, it is necessary to provide a ventilation duct section for introducing the ventilation air from the blower 1 on the vehicle front side of the evaporator 21. Similarly, a ventilation duct portion through which the ventilation air passing through the heater core 22 flows is required also on the vehicle rear side of the heater core 22.

As described above, since the air ducts are required before and after the evaporator 21 and the heater core 22, there is a problem that the size in the vehicle front-rear direction becomes large.
Also, the size in the front-rear direction of the vehicle increases,
It is often difficult to install a blow mode switching unit that switches the blow mode on the vehicle rear side of the heater core 22. Therefore, there is a case where an arrangement in which the blowout mode switching unit is installed above the heater core 22 is adopted,
In this case, there is also a problem that the dimension in the height direction becomes large due to the installation of the blowout mode switching unit above the heater core 22.

[0007] From the above, there is a problem in that it is difficult to mount on a vehicle even in a center-placed layout, and lacks versatility. In view of the above, it is an object of the present invention to provide an air conditioner for a vehicle that can be easily mounted even in a narrow vehicle interior space by adopting a heat exchanger layout pursuing space efficiency. Things.

Another object of the present invention is to provide an air conditioner for automobiles in which the drainage of condensed water in a cooling heat exchanger is improved.

[0009]

In order to achieve the above object, the present invention employs the following technical means. According to the first aspect of the present invention, the blower (14) for blowing the conditioned air and the air blown by the blower (14) are disposed substantially horizontally in the case (29a, 29b, 29c) of the air conditioner unit. A cooling heat exchanger (21) that is introduced from below and cools the blown air and leads it upward.
The cooling heat exchanger (21) is inclined downward toward the front side in the blowing direction of the blast air, and the cooling heat exchanger (21) is provided with a cooling heat exchanger (21) below the inclined forward end. The drainage guide member (2) is almost in contact with the heat exchanger (21).
1k, 21k ') are arranged.

In the invention according to claim 2, the blower (14) for blowing the conditioned air and the case (2) of the air conditioner unit are provided.
9a, 29b, and 29c), the blast air blown by the blower (14) is introduced from below, and the cooling heat exchanger (21) that cools the blast air and leads it upward. ), And a heating heat exchanger (22) that is disposed substantially horizontally above the cooling heat exchanger (21) and heats the blast air. The cooling heat exchanger (21) The cooling heat exchanger (21) is inclined downward toward the front side in the blowing direction of the blown air, and is substantially in contact with the cooling heat exchanger (21) below the inclined forward end of the cooling heat exchanger (21). An air conditioner for automobiles, in which drain guide members (21k, 21k ') are disposed.

According to a third aspect of the present invention, in the vehicle air conditioner according to the first or second aspect, the heat exchange medium flow tube (21) in the cooling heat exchanger (21) is provided.
f) is arranged so as to extend in the same direction as the blowing direction of the blown air blown by the blower (14). According to a fourth aspect of the present invention, in the vehicle air conditioner according to any one of the first to third aspects, the inclination angle of the cooling heat exchanger (21) is 10 ° to 3 °.
It is characterized by a minute angle of 0 °.

According to a fifth aspect of the present invention, in the vehicle air conditioner according to any one of the first to fourth aspects,
The drainage guide members (21k, 21k ') are formed on the side wall surface (29a) so as to secure a gap (21m) between the drainage guide members and the side wall surface (29a') of the case (29a, 29b, 29c) of the air conditioner unit. '), And is characterized in that a condensed water discharge port (21c) is opened below the gap (21m).

According to a sixth aspect of the present invention, in the vehicle air conditioner according to any one of the first to fifth aspects,
The drainage guide member is a large number of drainage guide plates (21k) formed integrally with the resin case (29a, 29b, 29c) of the air conditioner unit. In the invention according to claim 7, claims 1 to 5
In the automotive air conditioner according to any one of the above, the drainage guide member is formed of a number of drainage guide corrugations (21k ') integrally formed with a resin case (29a, 29b, 29c) of the air conditioner unit. It is characterized by being.

According to the present invention, the conditioned air is blown.
Blower (14) and the case (2
9a, 29b, 29c) are disposed substantially horizontally in
Cooling to cool the air blown by the blower (14)
Use heat exchanger (21) and a, the cooling heat exchanger (2
1) is downward toward the front side in the blowing direction of the blowing air.
It is inclined to the front slope of the cooling heat exchanger (21)
The lower part of the leading end is almost in contact with this cooling heat exchanger.
Drain guide members (21k, 21k ')
Vehicle air conditioner. Note that the reference numerals in parentheses of the above-mentioned units indicate the correspondence with specific units described in the embodiments described later.

[0015]

According to the first to eighth aspects of the present invention,
Having the above specific means, the cooling heat exchanger (2
Substantially horizontally disposed to 1) (claim 2 in the heating heat exchanger (22) also because it horizontally arranged), and substantially cooling heat exchanger of the vehicle front-rear direction dimension of the air conditioning units (21)
The size can be set to be equal to the size of the unit, and it can be significantly reduced from the conventional center-mounted unit.

Further, since the heat exchanger (21) is arranged in a substantially horizontal direction, the space of the heat exchanger section in the vertical direction can be made very small. As a result, the blow mode switching section is provided above the heat exchanger section. Even if it is installed, the size of the air conditioner unit in the vehicle vertical direction can be made sufficiently smaller than that of a conventional center-placed unit. Therefore, it is easy to mount the air conditioner unit even in a narrow vehicle interior space, and its practical effect is great.

Further, the cooling heat exchanger (21) is inclined downward toward the front side in the blowing direction of the blown air, and the cooling heat exchanger (21) is provided below the inclined forward end of the cooling heat exchanger (21). Since the drainage guide members (21k, 21k ') are arranged almost in contact with the cooling heat exchanger (21), condensed water collected at the inclined forward end of the cooling heat exchanger (21) is discharged. A bridge is formed with the members (21k, 21k '), and falls down almost continuously along the surface of the drainage guide member (21k, 21k').

Therefore, even if the cooling heat exchanger (21) is arranged substantially horizontally and the air is blown from below, the condensed water does not grow into a large mass in the cooling heat exchanger (21). , Can be smoothly dropped downward, and the drainage of condensed water can be greatly improved. In addition to the above operation and effect, in the invention according to the third aspect, the tube (21f) for flowing the heat exchange medium in the heat exchanger (21) for cooling.
Are arranged in the blowing direction, so that this tube (2
1f), the condensed water is pressed by the blast air on the surface, and the inclined forward end (FIGS. 3 and 5) of the cooling heat exchanger (21) is smoothly moved.
Of the condensed water can be further improved.

According to the fourth aspect of the present invention, the inclination angle of the cooling heat exchanger (21) is set to a small angle of 10 ° to 30 °, so that the water holding amount in the cooling heat exchanger (21) is reduced. Thus, drainage of condensed water can be improved. In the invention according to claim 5, the drainage guide member (21k, 21k ')
To the case (29a, 29b,
A gap (21m) between the side wall surface (29a ') and the side wall surface (29a').
Is disposed away from the side wall surface (29a ') so as to secure the condensed water discharge port (21c) below the gap (21m).
1k, 21k '), and the condensed water falling downward almost continuously along the surface can be smoothly discharged to the condensed water discharge port (21c) without any obstacle.

Further, the cooling heat exchanger (21) has a condensed water discharge port (21c) at a lower portion thereof, and the condensed water discharge port (21c) is located upstream of the cooling heat exchanger (21). Since the cooling heat exchanger (2
The condensed water of 1) flows down to the lower air upstream side, and the dropped condensed water is heated by the high-temperature air before cooling. Therefore, the case (29a, 29b, 2
Since the outer surface temperature of 9c) does not decrease so much, the dew on the case is greatly reduced or the dew is eliminated, so that the insulator (insulation material) which should be usually mounted inside the case should be eliminated. And cost reduction can be achieved.

In the invention according to claim 6, the drainage guide member is formed of a resin case (29a,
29b, 29c) and a plurality of drainage guide plates (21k) integrally formed therewith. In the invention according to claim 7, the drainage guide member is formed of a resin case (29a, 29b, 29c) of the air conditioner unit. ), The drainage guide member can be manufactured extremely simply and at low cost by integrally molding the resin case.

[0022]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. (First Embodiment) FIGS. 1 to 9 show a first embodiment.
1 and 2, an engine room A and a vehicle room B of an automobile
Are divided by a partition plate C (generally called a firewall and made of an iron plate). The blower unit 1 of the air conditioner is arranged offset from the center of the instrument panel P in the vehicle compartment B in the vehicle width direction (for a right-hand drive vehicle, offset to the left in the vehicle width direction).

The blower unit 1 has an inside / outside air switching box 1 for switching and introducing between the vehicle interior air and the vehicle exterior air in an upper portion thereof.
The inside / outside air switching box 11 has an outside air introduction port 12 and an inside air introduction port 13, and an inside / outside air switching door (not shown) for opening and closing the two introduction ports 12, 13 is provided in the inside. ) Is installed. Below the inside / outside air switching box 11,
As shown in FIG. 3, a blower 14 is arranged, and the blower 14 is a centrifugal multi-blade fan (sirocco fan) 1.
5, a fan drive motor 16 and a scroll casing 17.

The rotation axis of the fan 15 is arranged so as to be directed substantially vertically, and the rotation of the fan 15 causes suction from the inside / outside air switching box 11 through a bell mouth-shaped suction port 18 (see FIG. 3) in the upper part of the scroll casing 17. The blown air is blown in a substantially horizontal direction toward the outlet of the scroll casing 17 (from the left side to the right side of the vehicle compartment B as understood from FIG. 1).

On the other hand, an air conditioner unit 2 containing a heat exchanger for air conditioning, which will be described later, is arranged at a substantially central portion of an instrument panel P in a vehicle compartment B. In this air conditioner unit 2, the evaporator (cooling heat exchanger) 21 of the refrigeration cycle is installed in a substantially horizontal state, and the blast air from the blower unit 1 flows in from below.

A heater core (heating heat exchanger) 22 is installed in a substantially horizontal state on the downstream side of the evaporator 21 (upper side of the vehicle compartment).
Uses engine cooling water (warm water) as a heat source. The upper portion (downstream of air) of the heater core 22 in the vehicle interior is shown in FIG.
As shown in FIGS. 5 and 6, a blowing mode switching unit 23 is provided.

In this embodiment, a hot water control valve 24 (see FIGS. 3 and 4) for controlling the flow rate of hot water to the heater core 22 is provided as a temperature control means for air conditioning. By controlling the flow rate of hot water to the heater 22, the amount of air heating by the heater core 22 is adjusted to control the temperature of air blown into the vehicle interior. The outlet mode switching unit 23 is for switching the outlet mode to the vehicle interior, and as shown in FIGS. 4, 5, and 6, a center face (upper) outlet for blowing air toward the head of the occupant in the vehicle interior. (Not shown) and a side face air passage 26 communicating with a side face air outlet (not shown), and a foot (foot) blowing air toward a foot of an occupant in the vehicle cabin. A foot blowing air passage 27 communicating with an outlet (not shown), and a defroster blowing outlet (not shown) for blowing air toward a window glass.
And a plurality of blow-off air passages 25, 26, 27, 28, which are switched by door means (plate-like door, rotary door having an arc-shaped outer peripheral surface, film-like door). It opens and closes.

Since the blow-out mode switching section 23 may have a known configuration, a detailed description thereof will be omitted. In this embodiment, as shown in FIG. 6, the blow-out mode switching section 23 is formed in a cylindrical shape. Inside, a rotary door 23a having an air passage opening formed in a cylindrical outer peripheral surface is rotatably installed, and the plurality of blow-off air passages 25, 26, 27, and 28 are selectively opened and closed by selecting a rotation position of the rotary door 23a. A plurality of blowing modes such as a well-known face blowing mode, a bi-level blowing mode, a foot blowing mode, a defroster blowing mode, and a foot / defroster combined blowing mode can be selected.

The evaporator 21 and the heater core 22 are arranged adjacent to the partition plate C as shown in FIG.
And a refrigerant pipe 21 for allowing the refrigerant to enter and exit the evaporator 21
a are both disposed on the engine room A side, and the hot water pipe 22a and the refrigerant pipe 21a pass through the partition plate C (firewall) and protrude in the direction of the engine room A when assembled to the vehicle. Is provided.

Therefore, when the automotive air conditioner is mounted on a vehicle, the work of connecting the pipes to the hot water pipe 22a and the refrigerant pipe 21a only needs to be performed in the engine room A, but not in the vehicle room B. Absent. Since there is no need to perform the pipe connection work in a particularly narrow space of the instrument panel P, the workability of the pipe connection can be improved.

In FIG. 6, a pipe through hole (not shown) of the partition plate C is sealed with a seal member (grommet) G formed of an elastic material such as rubber. A temperature-operated expansion valve 21b is provided between the evaporator 21 and the refrigerant pipe 21a as a pressure reducing means for reducing and expanding the refrigerant. FIG. 7 shows a schematic configuration of the evaporator 21. A thin plate of a metal such as aluminum having excellent thermal conductivity and corrosion resistance is laminated in the vertical direction in the drawing to form a tube 21f, and a corrugate is provided between the tubes 21f. This is a laminated type in which the core portion 21h is formed with the fin 21g interposed.

At one end of the core portion 21h, a tank portion 21e for distributing the refrigerant to the large number of tubes 21f and collecting the refrigerant from the large number of tubes 21f is disposed. This makes the flow of the refrigerant in the tube 21f U-turn (see arrow A). A refrigerant inlet 21i through which the gas-liquid two-phase refrigerant decompressed by the expansion valve 21b flows into the tank 21e, and a core 2
A refrigerant outlet 21j from which the gas refrigerant evaporated in 1h flows out is provided.

FIG. 3 shows an assembling structure of the apparatus according to the present embodiment, in which a fan 15 of a blower 14 has a rotating shaft 16 of a motor 16.
a, and placed in the scroll casing 17 integrally formed with the resin lower case 29a,
The motor 16 is mounted and fixed to the scroll casing 17 at the flange portion 16b. The evaporator 21 is placed on the mounting surface of the lower case 29a, and is fixed between the two cases 29a and 29b by being sandwiched from above by a resin middle case 29b.

The bell mouth-shaped suction port 18 described above is opened in the upper lid portion 17a of the scroll casing 17 integrally formed with the middle case 29b, and the inside / outside air switching box 11 is provided above the bell mouth-shaped suction port 18. Are arranged and attached together. Heater core 22 and hot water control valve 24
Is mounted on the mounting surface of the middle case 29b and is fixed between the two cases 29b, 29c by being sandwiched from above by a resin upper case 29c.

The upper case 29c is provided with the above-described blow mode switching section 23, the center face blow air passage 25, the side face blow air passage 26, the foot blow air passage 27, and the defroster blow air passage 28, and is further provided with a rotary. The door 23a is built in. The connection between the cases 29a, 29b, 29c and the inside / outside air switching box 11 is detachable using a well-known elastic metal clip or screw.

In the air conditioning unit layout described above, the evaporator 21 is arranged in a substantially horizontal direction and the blown air is blown upward from below, so that the falling direction of the condensed water and the blow direction are opposite to each other. Therefore, improvement of drainage of condensed water generated in the evaporator 21 becomes a problem. Therefore, in the present embodiment, various measures are taken as described below in order to improve drainage of condensed water. That is, first, the evaporator 21 is disposed slightly inclined from the horizontal plane. More specifically, as shown in FIGS. 3 and 5, the evaporator 21 is moved downward (to the right in FIGS. 3 and 5) of the blown air blown by the blower 14 below the evaporator 21.
Are arranged to be inclined downward at a slight angle. Here, it is preferable that the inclination angle θ of the evaporator 21 be in the range of 10 to 30 ° as described later so that the water holding amount of the evaporator 21 itself is reduced.

Second, the tube 21 of the evaporator 21
f is arranged so as to extend in the same direction as the blowing direction of the blowing air (the direction from the left side to the right side in FIG. 5), whereby the condensed water is pressed on the surface of the tube 21f by the blowing air and smoothly inclined. Forward end (right end in Figs. 3 and 5)
It is going to move to. Here, the evaporator 21
The condensed water generated in step (1) is drawn out from a condensed water discharge pipe 21c provided at the inclined forward end of the evaporator 21 below the evaporator 21 (upstream of the air). 29a is formed integrally with the lowermost portion.

Further, the present inventor conducted detailed experimental observation on the behavior of the condensed water in the air conditioning unit layout when the condensed water was discharged, and found that the following drainage behavior occurred. That is, as shown in FIG. 8, the condensed water collects at the inclined forward end of the evaporator 21 due to the gravity and the pressure of the blowing air, and when the condensed water mass W grows to a certain size, the condensed water drops downward. It was found that the drainage falling motion was repeated.

In view of the above-described drainage behavior, the present inventor has proposed that the condensed water be supplied to the condensed water discharge pipe 21c side of the case 29a before the condensed water lump W becomes large in order to smoothly drain the condensed water. We have come up with a structure that can drain water continuously. For this reason, as shown in FIG. 9, the condensed water lump W is likely to concentrate on the lower portion of the inclined forward end of the evaporator 21 so as to substantially contact the tube 21 f of the evaporator 21 (a minute gap may be provided). , A vertical drain guide plate 21k is arranged. In this example, the drain guide plate 21k is a resin lower case 29.
9 (a), and a large number of drain guide plates 21k are arranged at predetermined intervals over the entire region in the depth direction below the inclined forward end of the evaporator 21 as shown in FIG. 9 (b). Have been.

Further, a gap 21m is provided between the drain guide plate 21k and the side wall surface 29a 'of the lower case 29a (FIG. 9).
The condensed water discharge pipe 21c is disposed below the space 21m so as to secure (a)). Next, the operation of the present embodiment in the above configuration will be described. In FIG. 5, the air flowing from the inside / outside air switching box 11 flows in the scroll casing 17 in a substantially horizontal direction by the blower fan 15 and flows into the lower part of the evaporator 21. Then, the blown air is dehumidified and cooled by the evaporator 21, flows further upward, is introduced into the heater core 22, and is heated here.

In the case of this example, the hot water control valve 2 for controlling the amount of hot water to the heater core 22 is used as the air conditioning temperature control means.
A so-called flow-regulating reheat method of obtaining a desired blown air temperature by adjusting the flow rate of hot water by the hot water control valve 24 is employed. Then, the conditioned air reheated to the desired temperature by the heater core 22 is distributed to a predetermined outlet by the rotary door 23a of the outlet mode switching unit 23 of the upper case.

In the present embodiment, the following effects can be obtained by adopting the above-described configuration. Both the evaporator 21 and the heater core 22 are arranged in a substantially horizontal direction and are arranged in a vertically overlapping layout so that air is introduced from the lower side and air is led out to the upper side. This eliminates the need for an air duct and greatly reduces the size of the air conditioner unit in the front-rear direction of the vehicle.

Since the space for the heat exchanger in the vertical direction can be reduced at the same time, it is easy to mount the air conditioner unit on the vehicle. Heat exchanger pipes 21a and 22a are directly connected to engine room A
With this configuration, sub-piping in the passenger compartment B is not required, so that significant cost reduction and simplification of pipe connection work can be realized.

As shown in FIG. 3, since most of the components of the air conditioner are vertically assembled, the air conditioner can be assembled by one-way assembly during mass production. In addition, the number of assembling steps can be reduced. The evaporator 21 is inclined downward toward the front side in the blowing direction of the blowing air blown downward,
Also, since the tubes 21f of the evaporator 21 are also arranged in the blowing direction, the condensed water is pressed by the blowing air on the surface of the tube 21f, and smoothly moves to the inclined forward end (the right end in FIG. 5) of the evaporator 21. get together.

Further, a vertical drainage guide plate 21k is arranged below the inclined forward end of the evaporator 21 so as to be almost in contact with the evaporator 21, so that as shown in FIG. The condensed water collected at the inclined forward end forms a bridge with the drainage guide plate 21k, and travels down the surface of the drainage guide plate 21k almost continuously downward.

Therefore, even in a layout in which the evaporator 21 is arranged substantially horizontally and air is blown from below, the condensed water smoothly falls downward without growing into a large lump by the evaporator 21. At this time, the drain guide plate 21k is formed apart from the side wall surface 29a 'so as to secure a gap 21m between the drain guide plate 21k and the side wall surface 29a' of the lower case 29a, and the condensed water discharge pipe 21c is provided below the gap 21m. Is disposed, the condensed water dropped along the large number of drain guide plates 21k smoothly flows into the pipe 21c and is discharged. Experiments confirmed that the condensed water forms a bridge with the drainage guide plate 21k, travels down the surface of the drainage guide plate 21k, and falls almost continuously downward.

Since the condensed water of the evaporator 21 flows down to the lower air upstream side, the dropped condensed water is heated by the high-temperature air before cooling. Therefore, the lower case 29
Since the outer surface temperature of a does not decrease so much, the dew on the lower case 29a is greatly reduced, or the dew is eliminated, so that an insulator (insulation material) to be normally mounted inside the case is abolished. The cost can be further reduced. (Second Embodiment) FIG. 10 shows that the drainage guide plate 21k is formed in a cross shape to further improve drainage. In other words, according to the cross-shaped drainage guide plate 21k, the airflow is blocked by the flange 210k, and a portion where no upward flow of the airflow is formed behind the flange 210k can be formed.

Therefore, the condensed water is more easily dropped on the back side of the flange 210k, and the drainage can be improved. As a modification of the second embodiment, the drain guide plate 21k is
It may be formed in the shape of a letter, and the drainage of the condensed water may be improved by using the back side of the T-shaped flange. FIG. 11 shows a numerical effect according to the second embodiment, in which the vertical axis represents the air volume when the voltage applied to the blower motor 16 (see FIG. 3) is 12 V, and the horizontal axis represents the inclination angle of the evaporator 21 with respect to the horizontal plane. Is taken.

In the drawing, the solid line indicates the case where the cross-shaped drainage guide plate 21k of the second embodiment is arranged, and the broken line indicates the case where the drainage guide plate 21k is not arranged, and the cross-shaped drainage guide plate 21k is arranged. In this case, the drainage of the condensed water can be improved, so that the amount of the condensed water held in the evaporator 21 decreases, and the ventilation resistance decreases. As a result, the air volume can be improved, which can contribute to the improvement of the air conditioning performance.

It should be noted that the inclination angle of the evaporator 21 is preferably in the range of 10 ° to 30 ° in order to reduce the amount of water retained in the evaporator 21 from the experimental results shown in FIG. (Third Embodiment) FIG. 12 shows a flat drain guide plate 21.
k is obliquely arranged with respect to the air flow, and a portion where the upward flow of the air flow is small is formed on the back surface 211k side, so that the condensed water easily falls on the back surface side of the drain guide plate 21k. . (Fourth Embodiment) FIG. 13 shows that a drain guide corrugated portion 21k 'is formed in the lower case 29a below the inclined forward end of the evaporator 21 to provide a drain guide function equivalent to the drain guide plate 21k. It is something that can be demonstrated.

In the above-described embodiment, the drain guide plate 21k and the drain guide corrugated portion 2 for improving drainability are provided.
Since 1k 'is integrally molded with the lower case 29a made of resin, there is an advantage that the members (21k, 21k') can be manufactured at extremely low cost.
k, 21k ') need not be integrally formed from the viewpoint of improving drainage. Therefore, these members (21k, 21k ')
May be formed as separate components and attached to the lower case 29a or the evaporator 21 by appropriate means.

The evaporator 21 is not limited to the above-described laminated type, but may be a so-called serpentine-type one in which a multi-hole flat tube is formed in a meandering shape and corrugated fins are combined with the meandering tube. May be used. Further, in the above-described embodiment, the flow control reheat system using the hot water control valve 24 for controlling the amount of hot water to the heater core 22 as the air conditioning temperature control means has been described. The present invention can also be applied to an air-mix type using an air-mix damper that controls the ratio of the amount of cold air that does not pass through the heater core 22 to the cool air.

[Brief description of the drawings]

FIG. 1 is a schematic plan view showing a state where a device of a first embodiment is mounted on a vehicle.

FIG. 2 is a schematic perspective view showing a state in which the device of the first embodiment is mounted on a vehicle.

FIG. 3 is an exploded view showing a method of assembling the device of the first embodiment.

FIG. 4 is a plan view of the first embodiment of the present invention.

FIG. 5 is a front view of FIG. 1;

FIG. 6 is a side view showing an arrangement relationship between the device of the first embodiment and a partition plate of a vehicle engine room.

FIG. 7 is a perspective view showing a schematic configuration of an evaporator in the apparatus of the first embodiment.

8A is a cross-sectional view showing the behavior of discharging condensed water from the evaporator in a state where the drainage guide plate is not arranged in the first embodiment, and FIG. 8B is a cross-sectional view as viewed from the right in FIG. FIG.

9A is a cross-sectional view showing a state in which a drainage guide plate is arranged in the device of the first embodiment, FIG. 9B is a cross-sectional view as viewed from the right side of FIG. 9A, and FIG. It is a partially enlarged view.

FIGS. 10A and 10B are a sectional view and a plan view showing a drainage guide plate according to a second embodiment of the present invention.

FIG. 11 is a graph showing the drainage improvement effect of the drainage guide plate according to the second embodiment of the present invention.

FIG. 12 is an explanatory view of a drainage guide plate according to a third embodiment of the present invention.

13A and 13B are a sectional view and a plan view of a drainage guide plate according to a fourth embodiment of the present invention.

FIG. 14 is a schematic perspective view of a conventional horizontal type automotive air conditioner.

FIG. 15 is a schematic perspective view showing a state in which a conventional horizontal-type automotive air conditioner is mounted on a vehicle.

FIG. 16 is a schematic perspective view showing a state where a conventional center-mounted type air conditioner for a vehicle is mounted on a vehicle.

[Explanation of symbols]

11: inside / outside air switching box, 14: blower, 15: fan, 17: scroll casing, 18: air inlet, 21: evaporator 21k ... drain guide plate, 21k ': drain guide waveform Part, 21 m ... gap, 22 ... heater core, 23 ...
... Blow-off mode switching unit, 29a ... Lower case, 29a '...
… Side wall surface

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Sugi Hikari 1-1-1, Showa-cho, Kariya-shi, Aichi Japan Inside Denso Co., Ltd. (56) References JP-A-4-238717 (JP, A) JP-A-1- 269609 (JP, A) Japanese Utility Model 63-32913 (JP, U) Japanese Utility Model 58-20873 (JP, U) Japanese Utility Model 3-122908 (JP, U) Japanese Utility Model 1-7018 (JP, U) 63-155714 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B60H 1/32

Claims (8)

(57) [Claims] 1. A blower for blowing conditioned air, and a blower arranged substantially horizontally in a case of an air conditioner unit, wherein blown air blown by the blower is introduced from below.
A cooling heat exchanger that cools the blast air and guides the cooling air upward. The cooling heat exchanger is inclined downward toward the front side in the blowing direction of the blast air. An air conditioner for a vehicle, wherein a drainage guide member is disposed below the inclined forward end of the exchanger so as to substantially contact the heat exchanger for cooling. 2. A blower that blows conditioned air, and a blower that is disposed substantially horizontally in a case of the air conditioner unit, and blown by the blower is introduced from below.
A cooling heat exchanger for cooling the blast air and leading it upward, and a heating heat exchanger disposed substantially horizontally above the cooling heat exchanger for heating the blast air, The cooling heat exchanger is inclined downward toward the front side in the blowing direction of the blown air, and a portion below the inclined forward end of the cooling heat exchanger is substantially in contact with the cooling heat exchanger. An air conditioner for an automobile, wherein a drainage guide member is disposed in the air conditioner. 3. The cooling heat exchanger according to claim 1, wherein a tube for flowing a heat exchange medium in the cooling heat exchanger is arranged to extend in the same direction as the blowing direction of the blown air blown by the blower. 3. The vehicle air conditioner according to 2. 4. The cooling heat exchanger has an inclination angle of 10 ° or more.
The vehicle air conditioner according to any one of claims 1 to 3, wherein the angle is a minute angle of 30 °. 5. The drainage guide member assures a gap between the drainage guide member and a side wall surface of a case of the air conditioner unit.
The vehicle air conditioner according to any one of claims 1 to 4, wherein the condensed water discharge port is disposed apart from the side wall surface and a condensed water discharge port is opened below the gap. 6. The vehicle according to claim 1, wherein the drainage guide member is a large number of drainage guide plates integrally formed with a resin case of the air conditioner unit. Air conditioner. 7. The automobile according to claim 1, wherein the drainage guide member is a plurality of drainage guide corrugations integrally formed with a resin case of the air conditioner unit. Air conditioner. 8. A blower for blowing conditioned air, Placed substantially horizontally in the case of the air conditioner unit,
Cooling heat exchange that cools the air blown by the blower
With a heat exchanger, This cooling heat exchanger is located on the front side in the blowing direction of the blowing air.
Inclined downward toward This cooling heat exchanger has a cooling heat
The drainage guide member is placed almost in contact with the heat exchanger for cooling.
An air conditioner for an automobile characterized by being used.