JP2002166720A - Air conditioner for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To properly blast conditioned air to the inside of a vehicle without increasing size of a device. SOLUTION: A heater core 4 is provided above an evaporator 3, and a cross flow fan 5 is provided above it. Air flows in an air conditioning unit 1 from an air inflow port 8 by rotation of the fan 5, and the inflow air passes the heater core 4 or a by-pass passage 11 after it passes the evaporator 3. Hot air passing the heater core 4 and cold air passing the by-pass passage 11 are mixed by the fan 5, become the conditioned air of uniform temperature and blasted to the inside of a car room from a blow-off port 9. Consequently, an air mix chamber, etc., are eliminated, and it is possible to miniaturize the device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a vehicle air conditioner having an evaporator, a heater core, and a blower fan.

[0002]

2. Description of the Related Art An air conditioner for a vehicle includes a cooler unit such as an evaporator, a heater unit such as a heater core, and a blower unit for selectively supplying air inside or outside the vehicle to the cooler unit and the heater unit. In a conventional vehicle air conditioner,
Generally, a blower unit is arranged at the uppermost stream, and air sent by the blower unit passes through an evaporator and is cooled. Part of the cooled air passes through the heater core and becomes hot air in accordance with the degree of opening of the temperature adjustment air mix door, and the rest bypasses the heater core with cold air. These hot air and cold air are mixed in the air mix chamber to become conditioned air at a predetermined temperature, and are blown into the vehicle from a predetermined outlet.

[0003]

Generally, a vehicle air conditioner is installed in a narrow space inside an instrument panel in a vehicle, so that the overall shape thereof is more compact while maintaining a predetermined air conditioning performance. It is desirable. However, in the above-described conventional vehicle air conditioner, air flows in the order of a blower unit, an evaporator, and a heater core, and mixes hot air and cold air downstream of the heater core. There is a problem of becoming. In addition, passage resistance is required to uniformly mix warm air and cold air in the air mix chamber, and the blower motor needs to be increased in size to feed air in opposition to the passage resistance. As a result, there are problems such as an increase in the weight of the device and an increase in power consumption.

[0004] When air conditioning control is performed independently on the driver's seat side and the passenger's seat side, each air conditioning unit is arranged in the center of the vehicle, and air is guided from the center of the vehicle to the driver's seat side and the passenger's seat side. For this reason, the space for arranging the air conditioning units in the vehicle front-rear direction in the vehicle center becomes large, and the living space in the vehicle is restricted accordingly.

An object of the present invention is to provide an air conditioner for a vehicle which can appropriately blow conditioned air into a vehicle without increasing the size of the device.

[0006]

A description will be given with reference to the drawings showing an embodiment. (1) The invention of claim 1 is applied to a vehicle air conditioner in which air is blown into a unit 1 having an evaporator 3 and a heater core 4 by a blower fan 5, as shown in FIGS. The above-described object is achieved by disposing the blower fan 5 downstream of the evaporator 3 and the heater core 4. (2) In the vehicle air conditioner according to the first aspect of the present invention, the blower fan 5 is disposed near the defroster outlet 9 provided in the vehicle width direction near the lower end of the front window 6. Things. (3) The invention of claim 3 is the vehicle air conditioner according to claim 1, wherein a rectifying plate 13 for changing the blowing direction between the occupant side and the front window 6 side is provided in the defroster outlet 9. is there. (4) According to a fourth aspect of the present invention, in the vehicle air conditioner according to the second or third aspect, the blower fan 5 has substantially the same length as the defroster outlet 9 in the vehicle width direction. (5) 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 blower fan 5 is a once-through fan whose rotation axis extends in the vehicle width direction. (6) The invention of claim 6 is the vehicle air conditioner according to any one of claims 1 to 5, wherein a pair of left and right branch passages branching from the downstream side of the evaporator 3 and the heater core 4 to both left and right sides in the vehicle width direction. 17, a pair of left and right blower fans 16 arranged in the branch passage 17, and a duct 14 for guiding air sucked by the blower fan 16 through the branch passage 17 to a predetermined position. (7) According to a seventh aspect of the present invention, in the vehicle air conditioner according to the sixth aspect, the blower fans 16 are arranged near the left and right sides of the blower fan 5. (8) According to an eighth aspect of the present invention, in the vehicle air conditioner according to the sixth or seventh aspect, the blower fan 16 is a sirocco fan having a rotating shaft in a vehicle width direction. (9) The invention of claim 9 is the vehicle air conditioner according to any one of claims 6 to 8, wherein the condensed water generated in the evaporator 3 is discharged out of the unit 1 as shown in FIGS. And a discharge passage 32, 33 extending from the duct 14 to the drain passage 31. (10) As shown in FIGS. 10 and 11, the invention of claim 10 is applied to a vehicle air conditioner in which air is sent by blower fans 5 and 16 to a unit 50 having an evaporator 3 and a heater core 4. . A plurality of blower fans 5 and 16 are arranged downstream of the evaporator 3 and the heater core 4, and outlets 9A to 9C are provided downstream of the blowers 5 and 16, respectively. The above-described object is achieved by providing the partition member 52 that divides the inside of the unit 50 so that an independent air path is formed for each of the blower fans 5 and 16 between the evaporator 3 and the heater core 4. (11) The invention of claim 11 is the vehicle air conditioner according to claim 10, wherein the blower fan has a once-through fan 5 and a sirocco fan 16, and the sirocco fan 16 are arranged. (12) The invention according to claim 12 is the vehicle air conditioner according to claim 10 or 11, wherein, as shown in FIG.
The blower fans 5 and 16 are supported by the partition member 52. (13) The invention according to claim 13 is the vehicle air conditioner according to any of claims 10 to 12, wherein the evaporator 3
And at least one of the heater cores 4 is supported by the partition member 52. (14) The invention according to claim 14 is the vehicle air conditioner according to any of claims 10 to 13, wherein the air sucked by the blower fans 5, 16 flows into or bypasses the heater core 4 to adjust the temperature. An air mix door 51 is provided, and notches 52c and 51b are provided at the intersection of the partition member 52 and the air mix door 51 so that the air mix door 51 can rotate.

[0007] In the section of the means for solving the above-mentioned problems, which explains the configuration of the present invention, the drawings of the embodiments are used to facilitate understanding of the present invention. However, the present invention is not limited to this.

[0008]

According to the first aspect of the present invention, the blower fan is disposed downstream of the evaporator and the heater core, so that an air mixing chamber for mixing hot air and cold air and a passage resistance are not required. Uniform conditioned air without temperature distribution can be blown into the vehicle interior without increasing the size of the device. According to the second aspect of the present invention, since the blower fan is arranged near the defroster outlet, the airflow resistance can be reduced, and an air conditioning system with low power consumption can be obtained. According to the third aspect of the present invention, since the rectifying plate for changing the blowing direction between the occupant side and the defroster window side is provided, the space efficiency is improved. According to the invention of claim 4, since the blower fan is provided to have a length substantially equal to the defroster outlet in the vehicle width direction, it is possible to blow air uniformly in the vehicle width direction and to reduce the temperature distribution in the vehicle compartment. Can be reduced. According to the fifth aspect of the present invention, since the blower fan is a once-through fan, wide air can be easily blown. According to the invention of claim 6, a blower fan is provided in a branch passage branching from the downstream side of the evaporator and the heater core to the left and right sides in the vehicle width direction, and the conditioned air is guided to a predetermined position via the duct by rotation of the blower fan. Therefore, it is easy to blow air to a predetermined location. According to the seventh aspect of the present invention, since the blower fans are arranged near the left and right of the blower fan, there is no waste in the arrangement of the blower fans, and the entire air conditioning unit can be saved in space. According to the invention of claim 8,
Since the sirocco fan is used as the blower fan, the increase in space due to the provision of the blower fan is small, and the air downstream of the heater duct can be effectively blown to a predetermined position. According to the ninth aspect of the present invention, since the drain passage for discharging the condensed water generated in the evaporator to the outside and the exhaust passage from the duct to the drain passage are provided, the discharge of the condensed water from the drain pipe is promoted. At the same time, backflow of air from the drain pipe into the unit is prevented. According to the tenth aspect of the present invention, a plurality of blower fans are arranged downstream of the evaporator and the heater core, and an air outlet is provided downstream of each blower fan, so that an independent air path is formed for each blower fan. Since the inside of the unit is divided, the amount of air blown from each outlet is determined according to the static pressure characteristics and the ventilation resistance of each fan, and the amount of air blown from each outlet becomes appropriate. According to the eleventh aspect, since the sirocco fans are provided on both left and right sides in the rotation axis direction of the once-through fan, it is possible to blow various air without increasing the size of the device. According to the twelfth aspect of the invention, since the blower fan is supported by the partition member, there is no need to separately provide a support member, the number of components is reduced, and the apparatus can be downsized. According to the thirteenth aspect, at least one of the evaporator and the heater core is supported by the partition member, so that there is no need to separately provide a support member, and cost and weight can be reduced. According to the fourteenth aspect of the present invention, the notch is provided at the intersection of the partition member and the air mix door so that the air mix door can be rotated. It will be easier.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment A first embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a side sectional view showing a schematic configuration of an air conditioning unit 1 constituting a vehicle air conditioner according to a first embodiment of the present invention, and FIG. 2 is a sectional view seen from a vehicle rear side. (Not shown). As shown in FIGS. 1 and 2, an evaporator 3, a heater core 4, and a cross-flow fan 5 (blower fan) are vertically arranged in a case 2 of the air conditioning unit 1. The air-conditioning unit 1 is stored inside a center cluster in the center of the vehicle where audios and the like are arranged, and inside an instrument panel 7 below a front window 6 as shown in FIG. Is done.

In FIG. 1, an air inlet 8 is provided at a lower end of the case 2 and an air outlet 9 is provided at an upper end of the case 2. A switching door 10 is provided at the inflow port 8 so as to be rotatable around a rotation shaft 10a.
A or the outside air OA outside the vehicle compartment is selectively taken into the unit 1. The evaporator 3 is arranged above the inflow port 8. The evaporator 3 traverses the inside of the case 2 obliquely in the vehicle front-rear direction, that is, is arranged with an upward gradient in the vehicle front-rear direction. A heater core 4 is disposed above the evaporator 3. A bypass passage 11 is formed behind the heater core 4, and the rotating shaft 1 is formed in the bypass passage 11.
A bypass door 12 (air mix door) that is rotatable around 2a is provided. The passage area of the bypass passage 11 is changed according to the amount of rotation of the bypass door 12, and air is distributed to the heater core 4 and the bypass passage 11 according to the passage area.

As shown in FIG. 2, the evaporator 3 and the heater core 4 are formed in the vehicle width direction. Evaporator 3
And the length of the heater core 4 is substantially equal to the length of the center cluster described above. Pipes 3a and 3b for passing refrigerant and pipes 4a and 4b for passing hot water are connected to a vehicle width direction end of the evaporator 3 and a vehicle width direction end of the heater core 4, respectively. A cooling cycle is configured. Above the heater core 4, a pair of right and left flow-through fans 5 are arranged in the vehicle width direction. The cross-flow fan 5 is rotatably supported by a bracket 2 a fixed to the inner wall of the case 2, and the rotation of the fan 5 causes air to flow into the unit 1 from the inflow port 8.

As shown in FIG. 1, a plurality of flow straightening plates 13 are provided immediately downstream of the once-through fan 5, and the air passing through the fan 5 is blown out of the outlet 9 while being straightened by the flow straightening plate 13. The direction of the current plate 13 can be changed substantially upward and substantially rearward (obliquely upward). When the current plate 13 is directed substantially upward, the air in the unit 1 is disengaged from the front window 6.
And the outlet 9 functions as a defroster outlet. When the current plate 13 is directed substantially rearward, the air in the unit 1 is blown toward the occupant, and the outlet 9 functions as a vent outlet. By changing the direction of the flow straightening plate 13 in this manner, the same outlet 9 can function as an outlet in a different mode. The outlet 9 is provided over the length L of the once-through fan 5, and the air from the outlet 9 is uniformly blown in the vehicle width direction.

As shown in FIG. 2, ducts 14 are provided on the right and left outer sides of the case 2, respectively, and the ducts 14 reach an outlet (not shown) provided below the feet of the occupant. A foot door 15 is provided in the middle of the duct 14 and can be opened and closed about a rotation shaft 15a. A sirocco fan 16 is disposed in the duct 14 at a position substantially at the same height as the cross-flow fan 5 in the vehicle width direction, and the sirocco fan 16 is rotatably supported on a side wall of the duct 14. The downstream side of the heater core 4 and the duct 14 communicate with each other through a branch passage 17,
By the rotation of the fan 16, the air downstream of the heater core 4 flows into the duct 14 via the branch passage 17. A shroud 18 for improving fan efficiency is provided around the cross-flow fan 5 and the sirocco fan 16.

Here, the once-through fan 5 and the sirocco fan 1
The fan characteristics of No. 6 will be described. FIG. 4 shows the fans 5, 1
FIG. 6 is a diagram illustrating a relationship between a blowing amount and a pressure according to a sixth embodiment. In the figure,
The characteristic a is the characteristic of one sirocco fan 16, the characteristic b is the characteristic of a pair of left and right sirocco fans 16, the characteristic c is the characteristic of a pair of right and left cross-flow fans 5, and the characteristic T is the air conditioning system obtained by adding the characteristics b and c. Are the characteristics of the airflow resistance acting on the air conditioning system. The once-through fan 5 is a fan that discharges air sucked from the circumferential direction of the wing in the circumferential direction of the wing, and the sirocco fan 16 is a fan that blows air sucked from the axial direction of the wing in the circumferential direction of the wing. is there. The once-through fan 5 is usually used as a home air conditioner, and the sirocco fan 16 is usually used as a blower fan of a vehicle air conditioner. Since the axial length of the cross-flow fan 5 of the present embodiment is longer than that of the sirocco fan 16, the cross-flow fan 5 has a smaller pressure and a larger air flow than the sirocco fan as shown by characteristics b and c.
In FIG. 4, the airflow w1 at the intersection of the characteristic T and the characteristic d is the total airflow of the air conditioning system, and the pressure P at that time.
The blowing amount w2 of the characteristic c in 1 is the blowing amount by the once-through fan 5, and the blowing amount w3 of the characteristic b in the pressure P1 is the blowing amount by the sirocco fan 16.

The doors 10, 12, 15 and the current plate 13 shown in FIGS. 1 and 2 are driven by the following actuators. FIGS. 5 and 6 are layout diagrams of actuators provided in the air conditioning unit 1. 5 and 6, illustration of the evaporator 3 and the heater core 4 is omitted. An actuator 21 for switching between inside and outside air is provided on a rotation shaft 10 a of the switching door 10, and the switching door 10 is switched by driving the actuator 21. This actuator 2
1 is driven, for example, by operating an inside / outside air changeover switch. An actuator 22 for turning the bypass door is provided on a rotation shaft 12a of the bypass door 12, and the bypass door 12 is turned by the driving of the actuator 22.
The actuator 22 is driven, for example, by operating a temperature adjustment dial.

The left and right foot doors 15 are connected by a link 23. An actuator 24 for opening and closing the air outlet is provided on a rotation shaft 23 a of the link 23.
4 through the link 23 by driving the left and right foot doors 1
5 are simultaneously driven to open and close. In addition, the left and right once-through fans 5
An actuator 25 for controlling the wind direction is provided between
The driving of the actuator 25 simultaneously drives the plurality of rectifying plates 13 via the link and the gear. These actuators 24 and 25 are driven by operating a mode selection switch, for example.

The operation of the vehicle air conditioner configured as described above will be described. For example, when the operation start of the air conditioner is commanded by turning on a fan switch in the vehicle interior, the cross-flow fan 5 and the sirocco fan 16 rotate. This allows
Inside air or outside air is selectively taken into the air conditioning unit 1 according to the switching position of the switching door 10. After the entire amount of the air taken into the air conditioning unit 1 passes through the evaporator 3 and is turned into cool air, the air is taken into accordance with the opening degree of the bypass door 12.
Part of the air passes through the heater core 4 to become hot air, and the rest passes through the bypass passage 11 as cool air. The warm air that has passed through the heater core 4 and the cool air that has passed through the bypass passage 11 are agitated by the once-through fan 5, whereby uniform conditioned air having no temperature distribution can be obtained. The conditioned air is rectified by the rectifying plate 13 and is blown toward the occupant when the vent mode is selected, and is blown toward the inside of the front window 6 when the differential mode is selected.
In vent mode or defrost mode, the foot door 15
Is closed. Note that the vent mode is a so-called center vent, but also functions as a side vent since the outlet 9 extends in the vehicle width direction. in this case,
If the left and right outlets 9 are directed to the left and right outer sides, the function as a side vent is further increased.

On the other hand, when the differential foot mode or the foot mode is selected, the foot door 15 is opened. The hot air that has passed through the heater core 4 and the cool air that has passed through the bypass passage 11 pass through the branch passage 17 and are sucked into the sirocane 16, and are stirred by the sirocco fan 16 to form uniform conditioned air having no temperature distribution. . This conditioned air is in duct 1
4, the air is guided to a predetermined outlet, and is blown toward the feet of the occupant. At the time of the foot mode, in the conventional air conditioner, control is performed so that defrost is not completely stopped. This is because if the air is blown only under the occupant's feet in the foot mode, the inside of the front window may be clouded. Even in the foot mode, the front window is controlled by slightly performing defrost. In the embodiment according to the present invention, in the foot mode, the flow-through fan 5 stops rotating. However, the air-conditioning air leaking from a slight gap between the fan 5 and the case is directed to the front window 6 by the rectifying plate 13 so that the front window 6 is rotated. The cloudiness of the window 6 is suppressed.

As described above, according to the first embodiment, the fans 5 and 16 are arranged downstream of the evaporator 3 and the heater core 4, and the fans 5 and 16 agitate the warm air and the cool air. There is no need for an air mix chamber or passage resistance for mixing wind and cold air, and uniform conditioned air without temperature distribution can be obtained with a compact structure. Further, the evaporator 3 and the heater core 4 are extended in the vehicle width direction, and the once-through fan 5 and the air outlet 9 are extended in the vehicle width direction so that the conditioned air is directly blown from the fan 5 into the vehicle interior. As a result, the airflow resistance of the air conditioning system can be reduced, an air conditioning system with low power consumption can be obtained, air can be uniformly blown in the vehicle width direction, and the temperature distribution in the vehicle interior can be reduced.

Further, a straightening plate 13 is provided at the outlet 9 and the direction of the straightening plate 13 can be changed to the direction of the occupant or the direction of the windshield 6, so that one outlet 9 is provided for a vent outlet and a differential. It can be used as an air outlet, improving space efficiency. Furthermore, sirocco fans 16 are provided on both the left and right sides of the once-through fan 5, and air that has passed through the heater core 4 and the bypass passage 11 is blown from a predetermined outlet through the branch passage 17, the sirocco fan 16, and the duct 14. Therefore, the air having the same temperature as the air outlet 9 can be easily blown to the feet of the occupant and to the rear of the vehicle in a state where the components constituting the air conditioning unit are arranged without waste.

Further, since the components such as the evaporator 3, the heater core 4, and the fans 5, 16 are arranged in the vertical direction of the vehicle, the size of the air conditioning unit 1 in the longitudinal direction of the vehicle can be reduced. Furthermore, since the components of the air conditioning unit 1 are arranged symmetrically in the vehicle width direction, independent air conditioning control can be easily performed on the driver's seat side and the passenger seat side by configuring, for example, as shown in FIG. Become. That is, the bypass door 12 is divided into two parts, left and right, and the opening of each of the doors 12L, 12R is independently controlled by a pair of actuators 22R, 22L.
The downstream of R is partitioned by a partition wall 30. Actuators 24R and 24L for opening and closing the foot doors are provided on the rotating shafts 15a of the left and right foot doors 15, respectively.
Are controlled independently. This enables left-right independent air conditioning control.

By the way, in the above, since the fans 5 and 16 are arranged downstream of the evaporator 3, the pressure inside the unit 1 becomes lower than the pressure outside or inside the vehicle. As a result, there is a possibility that air may flow back into the unit 1 via the drain pipe 31 for discharging the condensed water generated in the evaporator 3. In order to prevent this, for example, the configuration shown in FIG.

In FIG. 8, a drain pipe 31 is provided substantially below one of the right and left ducts 14. The bottom surface of the case 1 below the evaporator 3 is formed obliquely, and condensed water generated by heat exchange between the inflow air sucked in from the inflow port 8 and the evaporator 3 is transmitted to the drain pipe 31 through the bottom surface of the case 2. I will On the other hand, duct 14
A pipe 32 is provided at a lower portion of the, and the foot door 15 is provided above the pipe 22. A venturi 32 a is provided at the tip of the pipe 32, and the tip of the pipe 32 is inserted into the drain conduit 31.

With such a configuration, the sirocco fan 1
Part of the air sucked in by the Venturi 32a
Is discharged from the drain line 31 via the This allows
The condensed water is discharged together with the air, and the discharge of the condensed water from the drain line 31 is promoted, and even if the pressure in the unit 1 becomes lower than the pressure outside or inside the vehicle,
Backflow of air from the drain line 31 into the unit 1 is prevented, and as a result, the inconvenience caused by disposing the fans 5 and 16 downstream of the evaporator 3 is eliminated. As shown in FIG. 9, the same effect can be obtained by forming the throttle passage 34 by extending the side wall 33 inside the case instead of the pipe 32.

-Second Embodiment- Next, a second embodiment of the present invention will be described with reference to FIGS. FIG. 10 is a side sectional view showing a schematic configuration of an air conditioning unit 50 constituting a vehicle air conditioner according to a second embodiment of the present invention, and FIG. 11 is a sectional view seen from the vehicle rear side. (Not shown). In addition,
1 and 2 are denoted by the same reference numerals, and the differences will be mainly described below. In the first embodiment, the air taken into the air conditioning unit 1 is diverted downstream of the heater core 4 to the cross-flow fan 5 and the sirocco fan 16, but in the second embodiment, the air upstream of the evaporator 3 To diverge the flow to the cross-flow fan 5 side and the sirocco fan 16 side.

As shown in FIG. 10, the rotary shaft 51a of the bypass door 51 is provided at a side end of the upstream side surface of the heater core 4, and the bypass door 51 and the heater core 4 are integrated. As shown in FIG. 11, a partition plate 52 (partition member) is provided vertically between the cross-flow fan 5 and the left and right sirocco fans 16, and the inside of the case 2 is divided into three parts by the partition plate 52. Evaporator 3 and heater core 4
Extends through the partition plate 52 to the left and right inner walls of the case 2. Air inlets 8A to 8C are provided at the lower end of the case 2 corresponding to the fans 5 and 16, respectively, and air outlets 9A to 9C are provided at the upper end of the case 2, respectively.

FIG. 12 is a perspective view of a main part of the air conditioning unit 50. As shown in FIG. 12, the partition plate 52 is formed of a single plate, and notches 52a and 52b are provided in a part thereof corresponding to the positions of the evaporator 3 and the heater core 4. The evaporator 3 and the heater core 4 are notched 52
a, 52b, and is supported by the partition plate 52. The partition plate 52 is provided with a notch 52c extending from the notch 52b to the back side (rear side) so that the bypass door 51 can be turned. The notch 51b is formed in the bypass door 51 further deeper than the notch 52c. Is provided. Thus, the bypass door 51 can rotate without interfering with the partition plate 52.

In the air conditioner constructed as described above, the rotation of the sirocco fan 16 causes air to be sucked into the unit 50 from the inflow ports 8B and 8C, and the air passes through the evaporator 3 to rotate the bypass door 51. Passes through the heater core 4 or the bypass passage 11 according to Then, the mixture is stirred by the sirocco fan 16 and the outlet 9
B, 9C. Air is sucked into the unit 50 from the inflow port 8A by the rotation of the once-through fan 5, and the air passes through the evaporator 3 and the heater core 4 or the bypass passage 11, is agitated by the once-through fan 5, and is blown from the outlet 9A. Is done.

As described above, in the second embodiment, the fans 5 and 16 are disposed downstream of the evaporator 3 and the heater core 4, so that the air mix chamber and the passage resistance are not required as in the first embodiment. Thus, the size of the device can be reduced. Further, since the partition plate 52 is provided in the case 2 to divide the inside of the unit 50 and form an independent air path for each of the fans 5 and 16, the amount of air blown by each of the fans 5 and 16 is the same as that of the fan alone. It is determined by the static pressure characteristics, that is, the characteristics a and c in FIG. 4 and the system ventilation resistance d in each air path. As a result, the following problems are solved.

That is, when an independent air path is not formed (when there is no partition plate 52), the fan 5,
The static pressure upstream of 16 becomes equal, and the amount of air blown by each of the fans 5 and 16 is determined from the total characteristic T and the system airflow resistance d as shown in FIG. Here, when the characteristic b of the left and right sirocco fans 16, the characteristic c of the cross-flow fan 5, and the characteristic d of the ventilation resistance are given as shown in FIG. 13, for example, the total characteristic T and the characteristic d obtained by adding the characteristics b and c are obtained. Is the total air flow of the air conditioning system. In addition, the blowing amount w2 of the characteristic b at the pressure at that time
Is the amount of air blown by the sirocco fan 16, and the amount of air w3 of the characteristic c is the amount of air blown by the once-through fan 5. As a result, the blowing amount w3 of the once-through fan 5 becomes negative, and the air flows backward from the outlet 9A to the once-through fan 5. On the other hand, in the second embodiment, since an air path is formed for each of the fans 5 and 16, the static pressure characteristics a and
The amount of air blown from each of the outlets 9A to 9C is determined according to c and the airflow resistance d, and air can be sufficiently blown from the outlet 9A.

In the second embodiment, the partition plate 52
Since the notches 52a and 52b are provided at the intersections, there is no need to divide the evaporator 2 and the heater core 4 at the intersection with the partition plate 52, so that an increase in the number of parts can be suppressed, and the arrangement of parts and the piping 3a, 3b, 4a and 4b. It does not require complicated handling. Further, since the evaporator 2 and the heater core 3 are supported by the partition plate 52, there is no need to separately provide a support member, and cost and weight can be reduced. Furthermore, since notches 52c and 51b are provided in the partition plate 52 and the bypass door 51 at the intersection of the partition plate 52 and the bypass door 51, the temperature of each air path can be adjusted with one bypass door 51. An increase in the number of parts is suppressed, and the configuration is simplified.

In FIG. 11, the once-through fan 5 is connected to the bracket 2
Although the support is made via the “a”, the support may be made from the partition plate 52 as shown in FIG. Thus, the number of components can be reduced, and the cross-flow fan 5 can be made longer or the air-conditioning unit 50 can be made smaller by an amount corresponding to the removal of the bracket 2a.

The fans 5 and 16 are not necessarily provided in case 2.
There is no need to place them inside. When the fans 5 and 16 are arranged outside the case 2, for example, the configuration may be as shown in FIG. In FIG. 15, an opening 2 b is provided at the upper end of the case 2, and the upper end of the case 2 and the sirocco fan 16 are connected by a duct 53. Thereby, an air path is formed from the inlet 8C to the outlet 9C.

Further, as shown in FIG. 16 (a), a switching door 54 is provided rotatably on the downstream side of the sirocco fan 16, and together with the rectifying plate 13 shown in FIG. May be controlled. Thus, without increasing the size of the apparatus, for example, FIG.
As shown in (c), it is possible to blow various air in accordance with the air conditioning mode.

In FIG. 16C, when the vent mode is selected, the current plate 13 is rotated to the position d, and the switching door 54 is moved to the position a.
Is rotated. As a result, the blowing from the outlet 9F toward the feet of the occupant via the duct 14 is stopped, and a large amount of air is blown from the outlet 9A of the center vent and the outlet 9S of the side vent. When the bi-level mode is selected, the current plate 13 is turned to the position d and the switching door 54 is turned to the position b. Thereby, each outlet 9F, 9
Medium flow air is blown from A and 9S, respectively. When the foot mode is selected, the current plate 13 is turned to the position e, and the switching door 54 is turned between the positions b and c. Furthermore, the rotation of the once-through fan 5 is set to a low output. Thereby, a large amount of air is blown from the outlet 9F, and the outlets 9A, 9S
A small flow of air is blown from the air. When the differential foot mode is selected, the current plate 13 is turned to the position e and the switching door 54 is turned to the position b. Thereby, each outlet 9F, 9A,
A medium flow of air is sent from 9S. When the defrost mode is selected, the current plate 13 is turned to the position e, and the switching door 54 is turned to the position a. Thus, a large flow of air is blown from the outlets 9A and 9S, and the blowing from the outlet 9F is stopped. When the fan switch is turned off, the current plate 13 is turned to the position f, and the switching door 54 is turned to the position c, the rotation of the fans 5 and 16 is stopped, and
The air supply from F, 9A, 9S is stopped.

In the above description, the cross-flow fan 5 and the sirocco fan 16 are simultaneously rotated, but they may be separately rotated according to the air conditioning mode. Further, the rotation of the left and right fans 5, 16 may be controlled separately. Further, the duct 14 may be led to a location other than the foot outlet (for example, a rear vent). Furthermore, the present invention may be applied to an automatic air conditioner. Further, in the second embodiment, the sirocco fans 16 are arranged on the left and right sides of the once-through fan 5, but the combination and arrangement of the fans 5, 16 are not limited to this. Furthermore, although the partition plate 52 is arranged from the suction ports 8A to 8C to the outlets 9A to 9C, it may be arranged from immediately downstream of the evaporator 3 to the outlets 9A to 9C. Furthermore, sirocco fan 16
May be supported not from the case 2 but from the partition plate 52.

[Brief description of the drawings]

FIG. 1 is a schematic side sectional view of an air conditioning unit according to a first embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view in the vehicle width direction of the air conditioning unit according to the first embodiment of the present invention.

FIG. 3 is a cross-sectional view of a vehicle showing a state where the air conditioning unit is mounted.

FIG. 4 is a diagram illustrating an example of fan characteristics of a once-through fan and a sirocco fan.

FIG. 5 is a side view of an actuator provided in the air conditioning unit.

FIG. 6 is a vehicle width direction arrangement diagram of an actuator provided in the air conditioning unit.

FIG. 7 is a diagram showing a modification of the air conditioning unit according to the first embodiment of the present invention.

FIG. 8 is a diagram showing another configuration of the air conditioning unit according to the first embodiment of the present invention.

FIG. 9 is a diagram showing still another configuration of the air conditioning unit according to the first embodiment of the present invention.

FIG. 10 is a schematic side sectional view of an air conditioning unit according to a second embodiment of the present invention.

FIG. 11 is a schematic cross-sectional view in the vehicle width direction of an air conditioning unit according to a second embodiment of the present invention.

FIG. 12 is an essential part perspective view of an air conditioning unit according to a second embodiment of the present invention.

FIG. 13 is a diagram illustrating a problem of an air conditioning unit having a plurality of fans.

FIG. 14 is a diagram showing a modification of the air conditioning unit according to the second embodiment of the present invention.

FIG. 15 is a diagram showing another configuration of the air conditioning unit according to the second embodiment of the present invention.

FIG. 16 is a diagram illustrating the flow of air in each air conditioning mode by the air conditioning unit according to the second embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Air-conditioning unit 3 Evaporator 4 Heater core 5 Through-flow fan 6 Front window 9 Blow-out port 13 Rectifier plate 14 Duct 16 Sirocco fan 17 Branch passage 31 Drain pipeline 32 Pipe 33 Side wall 50 Air-conditioning unit 51 Bypass door 52 Partition plate 51b, 52c Notch

Claims (14)

[Claims] 1. A vehicle air conditioner in which air is supplied to a unit having an evaporator and a heater core by a blower fan, wherein the blower fan is arranged downstream of the evaporator and the heater core. Vehicle air conditioners. 2. The vehicle air conditioner according to claim 1, wherein the blower fan is disposed near a defroster outlet provided in a vehicle width direction near a lower end of a front window. Air conditioner. 3. The air conditioner for a vehicle according to claim 1, wherein a rectifying plate for changing a blowing direction between an occupant side and the front window side is provided at the defroster outlet. apparatus. 4. The air conditioner for a vehicle according to claim 2, wherein the blower fan has a length substantially equal to the defroster outlet in a vehicle width direction. 5. The air conditioner for a vehicle according to claim 1, wherein the blower fan is a once-through fan whose rotation axis extends in a vehicle width direction. . 6. The vehicle air conditioner according to claim 1, wherein a pair of left and right branch passages branching from a downstream side of the evaporator and the heater core to left and right sides in a vehicle width direction, respectively. An air conditioner for a vehicle, comprising: a pair of left and right blowing fans arranged respectively; and a duct for guiding air sucked by the blowing fans via the branch passage to a predetermined position. 7. The air conditioner for a vehicle according to claim 6, wherein the blower fan is disposed near left and right of the blower fan. 8. The air conditioner for a vehicle according to claim 6, wherein the blower fan is a sirocco fan having a rotation axis in a vehicle width direction. 9. The vehicle air conditioner according to claim 6, wherein a drain passage for discharging condensed water generated by the evaporator to the outside of the unit, and an exhaust gas from the duct to the drain passage. A vehicle air conditioner having a passage. 10. A vehicle air conditioner in which air is blown into a unit having an evaporator and a heater core by a blower fan, wherein a plurality of the blower fans are arranged downstream of the evaporator and the heater core. And a partition member for dividing the inside of the unit so as to form an independent air path for each of the blower fans from at least the outlet to the evaporator and the heater core. Vehicle air conditioner. 11. The air conditioner for a vehicle according to claim 10, wherein the blower fan includes a once-through fan and a sirocco fan, and the sirocco fans are arranged on both left and right sides in the rotation axis direction of the once-through fan. Vehicle air conditioner. 12. The air conditioner for a vehicle according to claim 10, wherein the blower fan is supported by the partition member. 13. The air conditioner for a vehicle according to claim 10, wherein at least one of the evaporator and the heater core is supported by the partition member. 14. The air conditioner for a vehicle according to claim 10, further comprising an air mix door for adjusting the temperature by flowing or bypassing air sucked by the blower fan into the heater core. A notch is provided at an intersection of the partition member and the air mix door so that the air mix door can rotate.