JPH09109658A - Air conditioner for car - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce an arrangement space for a heat exchanger part and also uniform the distribution of air velocities. SOLUTION: At the center part of an instrument panel inside a cabin, an evaporator 21 is arranged approximately horizontal, air is blown by a blower 14 from its under side to upper side, a heater core 22 is arranged approximately horizontal over the evaporator 21, and a blowing mode switchover part is arranged over it. Also an air guide plate 30 extending in the flow direction of blowing air from the scroll casing 17 of the blower 14 is arranged on the passage part located under the evaporator 21. Thus the distribution of velocities of air flowing in the evaporator 21 in the longitudinal direction of a vehicle is uniformed by an air guide action by the air guide plate 30.

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 an automobile, 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 a substantially 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. This type is shown in Figure 1.
As shown in FIG. 3, 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).

The mounting state on the vehicle is as shown in FIG. 14, in which the units 1, 2a and 2b are installed over almost half of the space in the instrument panel P of the vehicle in the vehicle width direction (front portion on the passenger side). As a result, the units 1, 2a, 2b occupy a very large portion of the internal space of 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. 15, an air conditioner unit 2 in which a cooler evaporator 21 and a heater core 22 are arranged in the vehicle front-rear direction and integrated is installed in the vehicle central portion, and only the blower 1 is widthwise from the vehicle central portion. A center-placed type structure that is offset from the center is also considered. 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 in terms of space. Therefore, an arrangement may be adopted in which the blowout mode switching unit is installed above the heater core 22. In this case, however, the heater core 2 that is vertically set
Since the outlet mode switching unit is further provided above the upper part 2, there is a problem that the dimension in the height direction becomes large.

[0007] As described above, there is a problem that even in a center-placed layout, it is difficult to mount it on a vehicle and lacks versatility. Therefore, in view of the above points, the present invention has an object to provide a compact automobile air conditioner that can be easily mounted even in a narrow vehicle interior space by adopting a heat exchanger layout in pursuit of space efficiency. It is what

Another object of the present invention is to make the air velocity distribution in the air conditioning heat exchanger part uniform in such a compact automobile air conditioning system.

[0009]

In order to achieve the above object, the present invention employs the following technical means. In the invention according to claim 1, the cooling heat exchanger (21) is arranged substantially horizontally in the vehicle interior instrument panel portion (P), and the blast air blown by the blower (14) is cooled. It is introduced into (21) from its lower side so that this blast air is cooled and discharged upward, and this heat exchanger for cooling (2
Above the 1), there is a heating heat exchanger (2) for heating the blast air.
2) is arranged substantially horizontally, and the blowout mode is changed over to the air downstream side of the heating heat exchanger (22) to switch the blowing direction of the air heated and temperature-controlled by the heating heat exchanger (22). The part (23) is arranged.

Further, the scroll casing (17) of the blower (14) is arranged in a substantially horizontal direction, and the winding end portion (17b) of the scroll casing (17) is located below the cooling heat exchanger (21). An air guide plate (which is connected to the air flow path and extends along the flow direction of the air blown from the scroll casing (17) of the blower (14) in the air flow path below the cooling heat exchanger (21) ( 30) is arranged.

According to the invention as set forth in claim 1, since it has the above-mentioned technical means, both the cooling heat exchanger (21) and the heating heat exchanger (22) are arranged substantially horizontally. Since the layout is such that they are vertically stacked, the space for the heat exchanger in the vertical direction can be made very small, and as a result, the height dimension can be made sufficiently smaller than the conventional center placement unit.

Moreover, since the space of the heat exchanger in the vertical direction can be made extremely small as described above, the temperature is adjusted above the heating heat exchanger (22) by being heated by the heating heat exchanger (22). Even if the blowout mode switching unit (23) for switching the blown air direction is arranged, the vertical dimension of the air conditioner as a whole can be kept small. Further, the two heat exchangers (21, 2) arranged substantially horizontally.
Since the blast air is introduced from the lower side of 2) and is blown to the upper side, there is no need to provide a blast duct section before and after the heat exchanger section as in the conventional center placement unit, and the front and rear of the vehicle. The dimension in the direction can be significantly shortened.

From the above, the device of the present invention can be easily mounted on a vehicle, and its practical effect is great. Further, an air guide plate (30) is arranged in the air flow path below the cooling heat exchanger (21), and the air guide plate (30) is arranged.
By the scroll casing (17) of the blower (14)
By guiding the air blown from the vehicle, the wind speed distribution in the vehicle front-rear direction can be made uniform. Therefore, the heat exchange efficiency can be improved by performing uniform heat exchange in each part of the cooling heat exchanger (21), and can also contribute to the uniformization of the wind velocity distribution of the inflowing air into the heating heat exchanger (22). .

In addition to the above function and effect, in the invention according to claim 2, the upper surface of the air guide plate (30) is brought into contact with the lower surface portion of the cooling heat exchanger (21), and the air guide plate (30) is used. Since the cooling heat exchanger (21) is supported, the cooling heat exchanger (21) having a large shape can be stably supported.
Further, in the invention according to claim 4, the air guide plate (30)
Among these, since a smooth bent portion (30a) along the air flow from the centrifugal fan (15) is formed at the end of the blower (14) on the centrifugal fan (15) side, the centrifugal fan The air from 15 can be smoothly guided by the air guide plate (30). Therefore, the occurrence of turbulence in the air flow due to the installation of the air guide plate 30 can be suppressed.

According to the sixth aspect of the invention, a plurality of air distribution plates (31) are arranged in the air flow path between the cooling heat exchanger (21) and the heating heat exchanger (22). Since the wind velocity distribution in the vehicle width direction in the heating heat exchanger (22) is made uniform, the wind velocity distribution and temperature distribution of the air blown into the vehicle interior can be made uniform, and the air conditioning feeling can be improved. Further, in the invention according to claim 7, in the unit case (29a) that accommodates the cooling heat exchanger (21), a step-like unevenness is formed in a portion located below the cooling heat exchanger (21). Since the surface (32) is formed and the wind velocity distribution of the air flowing into the cooling heat exchanger (21) in the vehicle width direction is made uniform,
The heat exchange in each part of the cooling heat exchanger (21) can be made more uniform, and the heat exchange efficiency can be improved.

The reference numerals in parentheses of the above-mentioned means indicate the correspondence with the concrete means described in the embodiments described later.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. (First Embodiment) FIGS. 1 to 5 show the first embodiment. In FIG. 1, an engine room A and a vehicle room B of an automobile are shown.
Are partitioned by a partition plate C (generally called a fire wall and made of an iron plate). The blower unit 1 of the air conditioner is arranged offset from the central portion in the vehicle width direction of the instrument panel P in the vehicle compartment B in the vehicle width direction (offset to the left side in the vehicle width direction for a right-hand drive vehicle).

As shown in FIG. 2, the blower unit 1 has an inside / outside air switching box 11 at the upper part thereof for switching and introducing the air inside the vehicle and the air outside the vehicle. The inlet 12 and the inside air inlet 13 are opened, and inside and outside air switching doors (not shown) for opening and closing both the inlets 12 and 13 are installed inside thereof. A blower 14 is arranged below the inside / outside air switching box 11, and the blower 14 includes a centrifugal multi-blade fan (sirocco fan) 15,
It is composed of a fan driving motor 16 and a scroll casing 17.

The rotating shaft of the fan 15 is arranged so as to be oriented in a substantially vertical direction, and the rotation of the fan 15 sucks the air from the inside / outside air switching box 11 through a bellmouth-shaped suction port 18 (see FIG. 5) in the upper part of the scroll casing 17. The air is blown toward the outlet of the scroll casing 17 in a substantially horizontal direction (from the left side to the right side of the vehicle compartment B as understood from FIG. 1).

On the other hand, the air conditioner unit 2 incorporating a heat exchanger for air conditioning, which will be described later, is arranged in the vehicle width direction central portion of the instrument panel P in the vehicle compartment B as shown in FIG. In this air conditioner unit 2, an evaporator (cooling heat exchanger) 21 of the refrigeration cycle is installed in a substantially horizontal state, and blown air from the blower unit 1 is introduced from the lower side thereof.

As shown in FIGS. 2 and 3, a heater core (heat exchanger for heating) 22 is installed in a substantially horizontal state on the air downstream side of the evaporator 21 (upper side of the passenger compartment),
The heater core 22 uses engine cooling water (warm water) as a heat source, and a blowout mode switching unit 23 (see FIG. 3) is arranged above the heater core 22 in the passenger compartment (on the air downstream side).

Here, in this example, a known hot water control valve 24 (see FIG. 5) for controlling the flow rate of hot water to the heater core 22 is provided as a temperature control means for air conditioning. Control the flow of hot water to 22
The temperature of air blown into the vehicle compartment is controlled by adjusting the amount of air heated by the heater core 22. The blowout mode switching unit 23 is for switching the blowout mode into the passenger compartment, and is a centerface blower that communicates with a centerface (upper) outlet (not shown) that blows air toward the passenger's head inside the passenger compartment. A side face outlet air passage 26 that communicates with the air passage 25 and a side face outlet (not shown), and a foot that communicates with a foot (foot) outlet (not shown) that blows air toward the occupant's feet in the passenger compartment. It has a blow-out air passage 27 and a defroster blow-out air passage 28 communicating with a defroster blow-out port (not shown) for blowing air toward the window glass, and these plural blow-out air passages 25, 26, 27, 28 are provided. A door means (a plate-like door, a rotary door having an arc-shaped outer peripheral surface, a film-like door) is used for switching and opening / closing.

The blow-out mode switching unit 23 may have a known structure, so a detailed description thereof will be omitted. In this example, the blow-out mode switching unit 23 is formed in a cylindrical shape extending in the left-right direction in FIG. A rotary door (not shown) having an air passage opening formed in a cylindrical outer peripheral surface is rotatably installed therein, and the plurality of blowout air passages 25, 26, 27, 28 are selected by selecting a rotational position of the rotary door. 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 by opening and closing. Note that, in FIG. 2, for simplification of the illustrated shape, the illustration of the cylindrical blowout mode switching unit 23 is omitted.

Further, the evaporator 21 is disposed at a slight inclination from the horizontal plane in order to improve the drainability of condensed water generated by its cooling action. That is, FIGS.
As shown in FIG.
The evaporator 21 is arranged so as to incline downward toward the front side (the right direction in FIG. 3) of the blown air blown by the blower 4.

Here, the inclination angle θ of the evaporator 21
Is preferably in the range of 10 to 30 ° so that the water holding capacity of the evaporator 21 itself is reduced. The evaporator 21 is made up of a plurality of thin metal plates made of aluminum or the like having excellent thermal conductivity and corrosion resistance in a direction perpendicular to the plane of FIG. 5 to form a large number of tubes 21a. It is a well-known laminated type in which a core portion is formed with a corrugated fin (not shown) interposed therebetween. As shown in FIG. 5, a tank portion 21b for distributing and collecting the refrigerant in the tube 21a is provided at one end portion of the evaporator 21, and the tank portion 21b is provided.
A temperature type expansion valve 21c for decompressing and expanding the refrigerant flowing into the evaporator 21 is provided adjacent to.

The tube 21a of the evaporator 21 is arranged so as to extend in the same direction as the blowing direction of the blown air (the direction from the left side to the right side in FIG. 3), whereby condensed water is discharged onto the surface of the tube 21a. The upper part is pressed by the blown air and smoothly moves to the inclined forward end (right end in FIG. 3). Here, the condensed water generated in the evaporator 21 is discharged from a condensed water discharge pipe 21c provided below the inclined forward end of the evaporator 21 on the lower side (air upstream side) of the evaporator 21. 21c is a resin lower case 2
It is integrally formed at the bottom of 9a (see FIG. 5).

On the other hand, a portion on the lower side of the evaporator 21,
In other words, the air guide plate 30 is installed at a site on the air upstream side of the evaporator 21 so as to extend in the direction along the flow of the blown air from the blower 14.
In this example, the air guide plate 30 is the resin lower case 2
9a is integrally molded. This air guide plate 30 is
As will be described later in detail, this is for uniforming the wind speed distribution of the air passing through the evaporator 21 in the vehicle front-rear direction.

Further, as shown in FIG. 3, the upper surface of the air guide plate 30 is an inclined surface 30a along the inclination of the evaporator 21, and the inclined surface 30a of the upper surface portion of the air guide plate 30 is an evaporator. The evaporator 21 is supported by contacting the lower surface of the evaporator 21. The air guide plate 30 divides the lower air flow passage of the evaporator 21 into two independent flow passages.

FIG. 5 shows the assembly structure of the apparatus of this embodiment. The fan 15 of the blower 14 is integrally connected to the rotary shaft 16a of the motor 16, and then the resin lower case 29a.
The motor 16 is mounted and fixed to the scroll casing 17 by its 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 located above the bell mouth-shaped suction port 18. Are placed 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-mentioned blow mode switching portion 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. The rotary door (not shown) 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.

Next, the operation of the first embodiment having the above structure will be described. 2 and 3, the air that has flowed in from the inside / outside air switching box 11 flows in a substantially horizontal direction inside the scroll casing 17 by the blower fan 15, and the evaporator 21
Flows into the lower part of. The blown air is the evaporator 2
After being dehumidified and cooled by 1, it flows further upward, is introduced into the heater core 22, and is heated there.

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 the upper case 2
A rotary door of the blowing mode switching unit 23 of 9c distributes the air to a predetermined blowing air passage.

In this embodiment, with the above-mentioned configuration, the following effects can be obtained. Since the evaporator 21 and the heater core 22 are both arranged in a substantially horizontal direction and have a layout in which the evaporator 21 and the heater core 22 are overlapped in the vertical direction, the space for the heat exchanger section in the vertical direction can be made very small, and as a result, the height is higher than that of the conventional center-mounted unit The dimensions can be made sufficiently small. Also in the vehicle front-back direction,
Since it is not necessary to provide a ventilation duct part in front of and behind the heat exchanger part, the size in the vehicle front-rear direction can be reduced, and therefore the air conditioner can be significantly downsized and installed in the vehicle interior easily.

As shown in FIG. 5, since most parts of the air conditioner are assembled vertically, the air conditioner can be assembled by stacking from bottom to top during mass production. The number of assembling steps can be reduced. The evaporator 21 is inclined downward toward the front side in the air blowing direction of the air blown below.
Further, the tubes 21a of the evaporator 21 are also arranged in the blowing direction (left and right directions in FIGS. 2 and 3), so that condensed water is pressed against the blowing air on the surface of the tubes 21a,
It smoothly gathers at the inclined forward end of the evaporator 21 (right end in FIGS. 2 and 3) and falls.

Then, the condensed water is discharged to the outside from the condensed water discharge pipe 21c located below the inclined forward end of the evaporator 21. Therefore, the condensed water is supplied to the evaporator 21
Can be discharged smoothly. Since the condensed water of the evaporator 21 flows down to the lower air upstream side, the falling condensed water is warmed by the blast air having a high temperature before cooling. Therefore, the outer surface temperature of the lower case 29a does not drop so much, and the dew condensation on the lower case 29a is greatly reduced or disappears. ) Can be abolished and the cost can be further reduced.

By installing the air guide plate 30, the wind velocity distribution of the air passing through the evaporator 21 in the vehicle front-rear direction can be made uniform. Since this air guide plate 30 forms an essential part of the present invention, the operation of this air guide plate 30 will be described in detail below. FIG. 4 is a cross-sectional view taken along line CC of FIG. 3, in which the winding end portion 17b of the scroll casing 17 of the blower 14 is connected to the lower side portion of the evaporator 21 of the lower case 29a, and the winding end portion 17b.
The portion extending from to the lower case 29a extends substantially parallel to the vehicle width direction (see FIG. 1).

The air guide plate 30 is arranged so as to extend substantially parallel to the vehicle width direction as shown in FIG. The flow direction D of the air blown out from the winding end portion 17b of the scroll casing 17 is the tangential direction of the winding end portion 17b, and the flow direction D is directed to the vehicle compartment side region R in the lower case 29a. Therefore, the wind speed distribution in the vehicle front-rear direction of the air passing through the evaporator 21 is large in the vehicle compartment side region R and small in the engine room side region E when the air guide plate 30 is not provided, resulting in unevenness. There is a problem that This non-uniform wind speed distribution causes a problem such as a decrease in heat exchange efficiency in the evaporator 21.

The inventors of the present invention used the experimental apparatus shown in FIGS. 6 and 7 to compare the comparative example without the air guide plate 30 with the air guide plate 3.
When the above wind speed distribution was measured for both of the products of the present invention having 0, the following results were obtained. That is, in the experimental device shown in FIGS. 6 and 7, the heater core 22 and the like on the air downstream side of the evaporator 21 are removed from the air conditioner shown in FIG. 3, and instead, an eight-divided wind speed measurement duct F is installed. There is. In FIG. 6, E _{1 to} E ₄ indicate engine room side openings of the wind speed measurement duct F, and R _{1 to} R ₄ indicate vehicle compartment side openings.

FIG. 8 shows the results of the wind velocity distribution measured using this experimental apparatus. FIG. 8 (a) shows the air guide plate 3
It is the wind speed distribution of the comparative example without 0, and the numbers 1 to 4 of the parts in FIG. 8 correspond to the numbers given to the respective openings in FIG. The blower 14 has a drive motor 16
It is operated with the applied voltage to 12V. In the case of the comparative example without the air guide plate 30, for the reasons described above, the wind speeds in the vehicle compartment side openings R _{1 to} R ₄ are higher than those in the engine room side openings E _{1 to} E ₄ , and FIG. As shown in a), the average wind speed on the engine room side is 7.5 m / s, while the average wind speed on the vehicle compartment side is 8.1 m / s. Therefore, the ratio between the average wind speed on the engine room side and the average wind speed on the vehicle compartment side is 7.5 / 8.1 = 0.92.

On the other hand, according to the product of the present invention in which the air guide plate 30 is provided, the air flow direction D of the air blown from the winding end portion 17b of the scroll casing 17 toward the vehicle interior side region R is set. Since it can be changed to the engine room side area E by 30, as shown in FIG.
Since the average wind speed on the engine room side and the average wind speed on the vehicle compartment side can be brought close to each other, the average wind speed on the engine room side increases to 7.9 m / s, while the average wind speed on the vehicle compartment side increases to 7.7 m. / S down to Therefore, the ratio of the average wind speed on the vehicle compartment side to the average wind speed on the engine room side is 7.
7/7, 9 = 0.97, and the difference between the average wind speeds is reduced to a marginal error value.

It should be noted that changing the air blowing direction D from the winding end portion 17b of the scroll casing 17 so as to be directed toward the engine room side area E also causes problems such as deterioration of the blower performance and expansion of the installation space in the passenger compartment. Occurs and is not preferable, so it cannot be carried out. (Second Embodiment) FIG. 9 shows a second embodiment. In this example, two air guide plates 30 are provided, and the air passage below the evaporator 21 is provided in three independent regions (flow paths). )
It is divided into E, M and R. The other points are the same as in the first embodiment. (Third Embodiment) FIG. 10 shows a third embodiment.
In this example, the centrifugal fan 15 of the air guide plate 30 is used.
An arc-shaped smooth bent portion 30a along the air flow from the centrifugal fan 15 is formed at the end portion on the side. By forming the bent portion 30a, the air from the centrifugal fan 15 can be guided to the engine room side area E more smoothly. Therefore, the occurrence of turbulence in the air flow due to the installation of the air guide plate 30 can be suppressed. (Fourth Embodiment) In the above-described first to third embodiments, the evaporator 21 is arranged so as to incline downward toward the front side in the blowing direction of the blown air blown downward. Since the air blown from the evaporator 21 obliquely flows into the heater core 22, the left and right wind velocity distribution in the heater core 22 varies. That is, the wind velocity distribution is generated such that the wind velocity of the air passing through the heater core 22 increases as it goes to the front side (right side in FIG. 11) of the evaporator 21 in the blowing direction.

Moreover, due to the variation in the wind velocity distribution, the amount of heat exchange at each of the left and right portions of the heater core 22 also varies, so that the blowing temperature also varies. Due to the variations in the wind speed distribution and the outlet temperature, the air conditioning feeling of the automobile air conditioner differs between the left and right sides of the passenger compartment, which causes the air conditioning feeling to deteriorate. Therefore,
In the fourth embodiment, as shown in FIG.
A plurality of air distribution plates 31 are arranged in the air flow path between the heater core 22 and the heater core 22 so that the wind speed distribution in the vehicle width direction in the heater core 22 is also made uniform.

The arrangement structure of the air distribution plate 31 will be specifically described. The air distribution plate 31 is arranged so as to be perpendicular to the air inflow surface of the heater core 22, and a plurality of air distribution plates 31 (three in this example) are arranged. The intervals between the air distribution plates 31 in () are set to be equal. The air distribution plate 31 is integrally formed with a resin case of the air conditioner unit 2, specifically, the middle case 29b. Therefore, the air distribution plate 31 can be easily formed at low cost.

In the fourth embodiment, the blast air that has passed through the evaporator 21 is forcibly guided by the air distribution plate 31 located immediately after the outlet of the evaporator 21, and the heater core 22
Flows perpendicularly to the air inflow surface. As a result, it is possible to remarkably improve the variation in the blowout air velocity distribution of the heater core 22, and to make the heater core blowout air velocity distribution uniform. (Fifth Embodiment) In the fifth embodiment, the wind velocity distribution in the vehicle longitudinal direction of the air flowing into the evaporator 21 is made uniform by the air guide plate 30, and at the same time, the wind velocity distribution in the vehicle width direction is made uniform. It is the one.

The air blown from the blower unit 14 of the blower unit 1 changes its direction at a substantially right angle in the lower portion of the evaporator 21 and flows upward, so that the front side of the evaporator 21 in the blowing direction (the right side in FIG. 12). ) Wind velocity distribution becomes high. Therefore, the air guide plate 30 is integrally formed with a resin case, specifically, the lower case 29a located below the evaporator 21, and the step-like uneven surface 32 is integrally formed with the resin case to form a vehicle of the evaporator 21. The wind velocity distribution is made uniform in the front-rear direction and the vehicle width direction.

The step-like concavo-convex surface 32 is formed so as to extend in a direction perpendicular to the flow direction of the blown air from the blower 14 (left-right direction in FIG. 12) (front-rear direction of the vehicle). In the example of FIG. 12, the staircase-like uneven surface 32 has two steps at the top of the staircase, and the step between the stepwise top and bottom of the uneven surface 32 is determined by an experiment conducted by the inventor. If
It has been found that setting the size to about 15 to 20 mm is preferable for uniforming the wind speed distribution. (Other Embodiments) The evaporator 21 is not limited to the above-described laminated type, and is a so-called serpentine type in which a multi-hole flat tube is formed in a meandering shape and corrugated fins are combined with the meandering tube. For example, other formats may be used.

[Brief description of the drawings]

FIG. 1 is a schematic plan view showing a state in which a device according to a first embodiment of the present invention is mounted on a vehicle.

FIG. 2 is a perspective view of the first embodiment of the present invention.

FIG. 3 is a front view of the first embodiment of the present invention.

FIG. 4 is a sectional view taken along the line CC of FIG. 3;

FIG. 5 is an exploded view showing an assembling method of the device of the first embodiment.

FIG. 6 is a plan view showing an experimental device for measuring a wind speed distribution in the device of the first embodiment and a comparative example.

7 is a front view of the experimental device of FIG.

FIG. 8 is a table showing experimental results obtained by the experimental apparatus shown in FIGS.

FIG. 9 is a cross-sectional view of an essential part showing a second embodiment.

FIG. 10 is a main-portion cross-sectional view showing a third embodiment.

FIG. 11 is a perspective view showing a fourth embodiment.

FIG. 12 is a perspective view showing a fifth embodiment.

FIG. 13 is a schematic perspective view of a conventional horizontal type automotive air conditioner.

FIG. 14 is a schematic perspective view showing a state in which a conventional horizontal type air conditioner for a vehicle is mounted on a vehicle.

FIG. 15 is a schematic perspective view showing a state where a conventional center-standing type air conditioner for automobiles is mounted on a vehicle.

[Explanation of symbols]

11: inside / outside air switching box, 14: blower, 15: fan, 1
7 ... Scroll casing, 18 ... Air inlet, 21 ...
Evaporator, 22 ... Heater core, 23 ... Blowout mode switching section, 30 ... Air guide plate, 31 ... Air distribution plate, 32 ... Uneven surface.

Front page continued (72) Inventor Koji Ito 1-1, Showa-cho, Kariya, Aichi Prefecture, Nihon Denso Co., Ltd. (72) Inventor Teruhiko Kameoka 1-1, Showa-cho, Kariya, Aichi Nihondenso Co., Ltd.

Claims (7)

[Claims] 1. A blower (14) for blowing conditioned air, and a blower (14) which is arranged substantially horizontally on an instrument panel section (P) in a vehicle compartment, and blows air blown by the blower (14) from below. A cooling heat exchanger (21) that cools the blown air and guides the blown air upward, and a heating heat exchanger that is arranged substantially horizontally above the cooling heat exchanger (21) and heats the blown air. Bowl (2
2) and is arranged on the air downstream side of the heating heat exchanger (22),
A blowout mode switching unit (2) that switches the blowout direction of the air that has been heated in the heating heat exchanger (22) and the temperature of which has been adjusted.
3), the blower (14) includes a scroll casing (17) arranged in a substantially horizontal direction, and a centrifugal fan (15) incorporated in the scroll casing (17) to blow air in a substantially horizontal direction. ) And a winding end portion (1) of the scroll casing (17).
7b) is connected to the lower air flow passage of the cooling heat exchanger (21), and the scroll casing (17) is provided in the lower air flow passage of the cooling heat exchanger (21). An air conditioner for a vehicle, characterized in that an air guide plate (30) extending along the flow direction of air blown from is arranged. 2. The upper surface of the air guide plate (30) is in contact with the lower surface of the cooling heat exchanger (21) so that the cooling heat exchanger (21) is removed by the air guide plate (30). The vehicle air conditioner according to claim 1, which is supported. 3. The air guide plate (30) partitions an air flow path below the cooling heat exchanger (21) into a plurality of independent flow paths, according to claim 1 or 2. Automotive air conditioner. 4. The air guide plate (30) is provided with a smooth bent portion (30) along an air flow from the centrifugal fan (15) at an end portion on the centrifugal fan (15) side.
The vehicle air conditioner according to any one of claims 1 to 3, wherein a) is formed. 5. A unit case (29a) for accommodating the cooling heat exchanger (21) is provided, and a winding end portion (1) of the scroll casing (17) is provided.
7b) is connected to the lower part of the cooling heat exchanger (21) of the unit case, and extends from the winding end portion (17b) of the scroll casing (17) to the unit case (29a). 5. The air guide plate (30) is arranged so as to extend substantially parallel to the vehicle width direction, and the air guide plate (30) is arranged so as to extend substantially parallel to the vehicle width direction. The automobile air conditioner described. 6. A wind speed distribution in the vehicle width direction of the heating heat exchanger (22) is provided in an air flow path between the cooling heat exchanger (21) and the heating heat exchanger (22). The air conditioning system for an automobile according to claim 1, wherein a plurality of uniform air distribution plates (31) are provided. 7. The cooling heat exchanger (21) is housed in a unit case (29a) accommodating the cooling heat exchanger (21) at a portion located below the cooling heat exchanger (21). 7. The automobile according to any one of claims 1 to 6, characterized in that a step-like uneven surface (32) is formed to make the wind velocity distribution in the vehicle width direction of the air flowing into (21) uniform. Air conditioner.