JPH0924722A - Air-conditioning device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a two-layer type air-conditioning device for vehicle which has a good air quantity balance. SOLUTION: A blower housed in an inside and outside air case 1a has a first fan 3b and a second fan 3c. At both sides of an electric motor in the axial direction, the first and second inside air intake ports 19 and 21 are provided respectively. In the inside and outside air case 1a, the first and the second communicating passages 22 and 23 to communicate the first and the second inside air intake port 19 and 20, and suction ports 17 and 18 respectively are provided. The upstreams of the first and the second communicating passages 22 and 23 are communicated by the third communicating passage 100. An outside air intake port 20 is formed to the third communicating passage 100. The distance of the first inside air intake port 19 and the suction port 17, and the distance of the second inside air intake port 21 and the suction port 18, are made almost equal. The distance of the outside air intake port 21 and the suction port 17, and the distance of the outside air intake port 20 and the suction port 18, are also made almost equal.

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 electric vehicle that requires power to generate heat for heating, or a hot water heater using engine cooling water, which has a high engine thermal efficiency and a low hot water temperature, such as diesel. The present invention particularly relates to an inside / outside air switching device in a vehicle air conditioner.

[0002]

2. Description of the Related Art Conventionally, in a vehicle in which it is difficult to obtain a heat quantity for heating, in order to increase the heating capacity, Japanese Patent Laid-Open No. 5-1244
There is one disclosed in Japanese Patent No. 26. This one is
The inside of the air passage is divided into two to make the first and second air passages,
A centrifugal multi-blade fan (sirocco fan) is arranged in each of the first and second air passages (generally called a two-layer flow unit).

Then, the inside / outside air state in which outside air (hereinafter, outside air) or inside air (hereinafter, inside air) is sent to both air passages, and the outside air is in one air passage and the inside is in the other air passage. The inside / outside air switching device is different from a general vehicle air conditioner (which does not divide the air passage into two) because of the necessity of the inside / outside air state for blowing air.
Specifically, the outside air intake port (9, same as below numbers in the publication)
And the inside air suction port (11) are arranged on the first air passage side and the second air passage side, respectively, and the outside air suction port (9) and the inside air suction port (11) are opened and closed. Outside air switching door (13) and inside air switching door (1
5) is installed.

When, for example, the outside air is taken into both the first and second air passages, the outside air switching door (13) is operated to the position Pc in FIG. 1 of the publication, and the outside air intake port (9).
Is fully opened, the inside air switching door (15) is operated to the position Pb in FIG. 1, and the inside air inlet (11) is fully closed. On the contrary, when the inside air is taken into both the first and second air passages, the outside air switching door (13) is operated to the position of Pb in the above FIG. Let
The outside air inlet (9) is fully closed, and the inside air inlet (1
1) is operated to the position Pa in FIG. 1, and the inside air introduction port (1
Fully open 1).

When the outside air is taken into the first air passage and the inside air is taken into the second air passage, the outside air switching door (1
3) is operated to the position Pa in FIG. 1 in the publication, and the outside air intake port (9) is fully opened so that the inside air is not sent to the second air passage side. Then, the inside air intake port (11) is fully opened.

[0006]

However, the above-mentioned conventional publications have the following problems. that is,
For example, when the inside air is taken into the first and second air passages, the outside air suction port (9) and the suction port of the fan arranged in the first air passage are close to each other, so that the pressure loss is small. Become. On the other hand, when the outside air taken in from the outside air intake port (9) is sent to the second air passage, it is sent to the intake port of the fan arranged in the second air passage so as to go around the fan. , Pressure loss becomes large.

In other words, the air volume balance between the first air passage and the second air passage is extremely poor, which causes a decrease in the overall air volume, and as a result, the air volume required for, for example, max cool cannot be obtained. There is such a problem. Also,
On the contrary, even when the inside air is taken into both the first and second air passages, there is a similar problem. Further, in the above-mentioned conventional publication, in order to take in the inside air or the outside air into both the first and second air passages, the inside air into the first air passage, and the outside air into the second air passage, the outside air switching door is used. (13) requires three stop positions Pa, Pb, and Pc in FIG. 1, and there is a problem that sealing is difficult at the position of Pb which is an intermediate operating position.

Therefore, it is an object of the present invention to provide a vehicle air conditioner having a good air flow balance as a first object. A second object is to provide a vehicle air conditioner having an inside / outside air switching device that can be easily sealed.

[0009]

The present invention employs the following construction as technical means. The reference numerals in parentheses correspond to the concrete means of the embodiments described below. In the invention according to claim 1, the case (1a) for guiding air into the vehicle compartment, and the fan (3b, 3c) housed in the case and generating an air flow toward the vehicle interior. And a motor (3d) for rotationally driving the fan, and the fan has one and the other suction ports (17, 18) on both sides in the axial direction of the motor.
And a blower (3) configured to suck air from these suction ports and blow the air radially outward of the fan, and the inside of the case on the downstream side of the blower, A partition member (5) for partitioning into a first passage (6) through which the air sucked from the suction port is blown and a second passage (7) through which the air sucked from the other suction port is blown A case which is provided at a portion of the case corresponding to each of the suction ports, opens at a predetermined interval in the axial direction of the motor, and is capable of taking in vehicle outside air or vehicle interior air into the case; First and second air intakes (19, 21)
And a first communication passage provided in the case for communicating the first air intake port with the one suction port,
A second communication passage that is provided in the case and that communicates the second air intake port with the other suction port, and the first air intake port and the one suction port that is provided in the case A first communication passageway (22) communicating with the mouth;
A second communication passage (23) provided in the case and connecting the first air intake port and the other suction port
And a third communication passage (10 provided in the case and connecting the first communication passage and the second communication passage).
0), and at least one third air intake port that is provided so as to open in the third communication passage and that introduces the outside-compartment air or the interior-compartment air that is opposite to the first air intake port into the case. (20) and an opening / closing means (28, 29, 30, 31) for opening and closing the first air inlet, the second air inlet, and the third air inlet. There is.

[0010] According to the second aspect of the present invention, in the first aspect,
In the invention described above, the third air intake port is formed in the case such that at least a part of the third air intake port is radially outward of the fan and between the pair of suction ports. I am trying. Further, in the invention according to claim 3, in the invention according to claim 1 or claim 2, the distance between each of the first and second air intake ports and each of the corresponding suction ports is substantially the same. It is characterized in that it is formed in the case so that.

According to the invention described in claim 4,
In the invention according to any one of claims 1 to 3, the opening / closing means includes a first opening / closing means (28, 30) and a second opening / closing means (29, 31). Means are provided between the first air intake and the third air intake, and the second opening and closing means is provided between the second air intake and the third air intake. The first opening / closing means, which is provided between the first communication path and the third communication path, connects the first communication path and the third communication path, and fully closes the first air intake port (FIG. (Position c in 3)
And selectively actuating a second operating position (position d in FIG. 3) that shuts off the first communication passage and the third communication passage and fully opens the first air intake. The second opening / closing means allows the second communication passage and the third communication passage to communicate with each other, and
The third operating position (the position of f in FIG. 3) that completely closes the air intake of the second air passage, the second communication passage and the third communication passage, and the second air intake is closed. Fully open fourth
It is characterized in that it is configured to selectively operate with the operating position (position e in FIG. 3).

According to the invention described in claim 5, claim 4
In the invention described above, the first and second opening / closing means are plate-shaped switching doors (28,
29), and when each of the first and second opening / closing means is in the first operating position and the third operating position, the first and second opening / closing means respectively include the above-mentioned The first and second opening / closing means are in contact with the opening edges (32, 33) of the first and second air intakes over the entire circumference, and the first and second opening / closing means respectively have the second operating position and the fourth When in the operating position, the first and second opening / closing means are in contact with contact portions (261, 34) provided in the case.

According to the invention of claim 6, claim 5
In the invention described above, the first air intake port and the second air intake port take in vehicle interior air into the case, and the third air intake port introduces vehicle exterior air into the case. The first and second opening / closing means are respectively in the second operating position and the fourth operating position, and the vehicle interior air is provided in both the first and second passages. And the first and second opening / closing means are in the first operating position and the third operating position, respectively, and air outside the vehicle compartment is provided in both the first and second passages. And the first and second opening / closing means are in the first operating position and the fourth operating position, respectively, and the outside air in the vehicle compartment and the second operating air are provided in the first passage. The two-layer flow mode that takes in the vehicle interior air for communication It is characterized that the conversion can be made.

According to the invention described in claim 7, claim 6
In the invention described above, an evaporator (4) disposed in the first and second passages on the air downstream side of the blower to cool the passing air, and a downstream of the evaporator in the first and second passages. Heater core (8) for heating air that has passed through the evaporator, and a foot outlet for blowing air toward the foot of the occupant, which is formed on the second passage side on the downstream side of the heater core. (13) and the first portion on the downstream side of the heater core
Is formed on the aisle side of the vehicle and has a defroster outlet (12) for blowing air toward the inner surface of the window glass of the vehicle and a face outlet for blowing air toward the upper half of the occupant. .

According to the invention described in claim 8,
In the invention described above, the abutting portion accommodates the fan and has a scroll casing shape (2).
4, 25). Further, in the invention according to claim 9, in the invention according to any one of claims 1 to 8, the third air intake is the first air intake and the second air intake. It is characterized by being formed between.

According to a tenth aspect of the invention, in the ninth aspect of the invention, the first to third air intake ports are formed along the axial direction.

[0017]

According to the configuration of the invention described above,
In the inventions according to claims 1 to 10, when the first and second air intakes are fully opened and the third air intake is fully closed by the opening / closing means, the first and second air intakes are provided. Are formed at a predetermined interval so as to correspond to each of the pair of suction ports of the fan, so that, for example, when the vehicle interior air is taken into the case, it is well balanced from the first air intake port to the one suction port. It is possible to send air from the second air intake to the other intake.

Further, at this time, if the distances between the first and second air intake ports and the respective suction ports corresponding thereto are substantially the same, a further effect can be obtained. Further, when the first and second air intake ports are closed and the third air intake port is opened by the opening / closing means, the first air intake port is formed in the third communication passage depending on the formation position of the third air intake port. It is possible to equalize the pressure loss between the communication passage and the second communication passage. Further, at this time, if the third air intake port is formed so as to be at least partially open in the radially outer region of the fan and between the pair of suction ports, a further effect can be obtained.

As a result, the air inside the vehicle and the air outside the vehicle can be taken into the case with good balance. Further, in particular, in the invention described in claims 4 to 6, the first opening / closing means selectively operates in the first operating position and the second operating position, and the second opening / closing means operates in the first operating position. The third operating position and the fourth operating position are selectively operated, so that a combination of two operating positions is used.
It is possible to switch between the all-inside-air mode, the all-outside-air mode, and the two-layer flow mode described in (1). Further, since it is possible to switch the modes by combining the two operating positions in this way, the first and second opening / closing means are connected to the first and second air intake ports as described in claim 7. Abutting the opening edge of
By making contact with the contact portion, a reliable seal can be obtained.

Further, in the invention according to claim 7, for example,
In a blowout mode that blows out air from both the foot blowout port and the defroster blowout port, or in a blowout mode that blows out air from both the foot blowout port and the face blowout port,
Since the balance is good as described above, it is possible to obtain substantially the same air volume very easily without biasing the air volume to one outlet. In addition, since the two-layer flow mode is possible, vehicle outside air can be blown out from the defroster outlet and face outlet, and vehicle inside air can be blown out from the foot outlet. In other words, fresh air outside the vehicle compartment can be blown out from the defroster outlet, and air inside the vehicle where a heating effect can be easily obtained can be blown out from the foot outlet.

Further, in the invention according to the eighth aspect, since the abutting portion is constituted by the scrolling portion for accommodating the fan, the seal can be secured with a simple structure.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 2 shows a schematic configuration diagram of the vehicle air conditioner 1 in the present embodiment. The vehicle air conditioner 1 according to the present embodiment is mounted on, for example, a diesel vehicle equipped with a diesel engine. Since a diesel engine generally generates less heat than a gasoline engine, it is difficult to obtain sufficient heating and heating capacity in winter.

In this vehicle air conditioner 1, the upper side of FIG. 2 is the front direction of the vehicle (E / G side), the lower side of FIG. 2 is the rear side of the vehicle (inside the passenger compartment), and the left-right direction of FIG. 2 is the vehicle width direction. Mounted on the vehicle. The vehicle air conditioner 1 includes a case 2 that forms an air passage for sending air toward the vehicle interior. The case 2 is made of a resin material such as polypropylene, and is configured by connecting an inside / outside air switching device (box) 2a, a cooler unit 2b, and a heater unit 2c in order from the air upstream side. These binding sites are indicated by alternate long and short dash lines X and Y in FIG.

The inside / outside air switching device 2a is for taking in at least one of the air inside the vehicle (hereinafter referred to as "inside air") and the air outside the vehicle (hereinafter referred to as "outside air"), and generates an air flow inside. The blower 3 is provided. The details of the inside / outside air switching device 2a will be described later. Inside the cooler unit 2b, an evaporator 4 which is a refrigerant evaporator for cooling the air passing therethrough is arranged so as to completely block the air passage thereof. Evaporator 4
Is a component of a refrigeration cycle (not shown) mounted on a vehicle.

In this refrigeration cycle, a compressor that compresses a refrigerant by a driving force of an engine of a vehicle to obtain a high-temperature high-pressure gas-phase refrigerant, a condenser that condenses and liquefies the high-temperature high-pressure gas-phase refrigerant, and a condensed-liquefied refrigerant It is a well-known device including a decompression expansion means (for example, an expansion valve) for decompressing and expanding, and the evaporator 4 for evaporating the decompressed and expanded refrigerant.

The heater unit 2c includes an evaporator 4
A heater core 8 that is a heating heat exchanger that heats the air passing through is disposed in a part of the air passage. The heater core 8 uses the engine cooling water as a heat source and intermittently interrupts the flow rate of the engine cooling water and the engine cooling water to the heater core 8 to appropriately heat the air that has passed through the evaporator 4.

Since the heater core 8 is arranged in a part of the air passage in the heater unit 2c, the air passing through the evaporator 4 in the heater unit 2c bypasses the heater core 8 in the cold air bypass passage ( Figure 2
Since it is provided on the back side of the middle heater core 8 in the drawing, (not shown) is formed. On the air downstream side of the evaporator 8 and on the air upstream side of the heater core 8, a cool air bypass passage and an air mix door 9 which is a temperature adjusting means for adjusting the rate of the amount of air sent to the heater core 8 are provided. A rotary shaft 10 is fixed to one end of the air mix door 9, and the air mix door 9 is rotatably installed by the rotary shaft 10 from the upper side of the plane of FIG.

Cooler unit 2b and heater unit 2
For example, the c is connected by a coupling means such as a claw fitting or a screw member. The insides of the cooler unit 2b and the heater unit 2c are provided with a first passage 6 located on the vehicle front side in FIG. 2 and a vehicle rear side in FIG. 2 by a partition wall 5 extending in a substantially vertical direction as shown in FIG. It is separated from the second passage 7 located. That is, the first passage 6 is located on the vehicle front side in the cooler unit 2a and the heater unit 2c, and the second passage 7 is located in the cooler unit 2a.
And located on the rear side of the vehicle in the heater unit 2c. Further, the evaporator 4, the heater core 8 and the air mix door 9 are arranged so as to straddle both the first passage 6 and the second passage 7.

On the air downstream side of the heater core 8 of the heater unit 2c, there are formed blowout openings for sending conditioned air to blowout openings, which will be described later, arranged at different positions in the passenger compartment. Specifically, the blowout openings are, in order from the upper side in FIG. 2 to the lower side in FIG. 2, the face opening 12, the defroster opening 11, and the second opening 6 that are opened to the first passage 6 side.
And an opening 13 for the foot that is open to the passage 7 side.

These blowout openings (11-13) have
Actually, an extension duct (not shown) is connected.
A defroster outlet (not shown) opened in the vehicle compartment, a center face outlet (not shown), a side face outlet (not shown), and a foot outlet (not shown) are respectively provided on the air downstream sides of these extension ducts. Are formed.

The defroster outlet is for blowing the conditioned air toward the inner surface of the window glass (not shown) of the vehicle, and the face outlet is mainly for the occupant's upper body. The foot outlet is for blowing out conditioned air toward the lower body of the occupant. Each blowout opening (11
13 to 13), a center face switching door 15, a defroster switching door 14, and a foot switching door 16 are arranged, and these switching doors 14 to 16 open and close the blowout openings (11 to 13). To be done. Then, these switching doors are rotated within a range indicated by an arrow in FIG. 2 by a servo motor (not shown) or the like as a driving unit so as to be in a predetermined blowing mode.

The predetermined blowout mode will be briefly described below. In the vehicle air conditioner 1 of this embodiment, the face mode in which only the face opening 12 is opened, the face opening 12 and the foot opening 13 are provided. A bi-level mode in which only both of them are opened, both the foot opening 13 and the defroster opening 12 are opened, and most of the air (for example, 80%) passing through the heater core 8 is blown to the foot opening 13. The rest (20%) of the defroster opening 1
2, the foot mode in which the air is blown to 2, the foot opening 13 and the defroster opening 12 are opened, and the heater core 8 is opened.
The foot openings 13 that are approximately equal in amount of the air that has passed through
Further, it is possible to switch between a foot diff mode that blows air to the defroster opening 12 and a defroster mode that blows conditioned air only to the defroster opening 12.

In this embodiment, the side face outlets are constructed so that the conditioned air is blown out in all of the above-mentioned blowing modes regardless of the operating positions of the switching doors 14-16. In these blowout modes, if the vehicle air conditioner 1 is an automatic air conditioner having an automatic temperature control function, the air conditioning environmental factors that affect the air conditioning state in the vehicle compartment are read from each sensor group, and the detected values are set in advance based on the detected values. It is determined that the set blowing mode is set.

Further, the partition wall 5 is interrupted on the downstream side of the heater core 8 and on the upstream side of the air of the blowout openings (11 to 13). As a result, the first passage 6 and the second passage 7 can communicate with each other at the downstream side portion of the heater core 8. The communication state between the first passage 6 and the second passage 7 is opened and closed by the foot switching door 16. Specifically, when the foot switching door 16 is in the rotating position shown by a in FIG. 2, the foot opening 13 is fully opened, and the first passage 6 and the second passage 7 are blown into the vehicle interior. It will be completely partitioned to the exit.

That is, in this state, the conditioned air in the first passage 6 is blown to either the defroster opening 11 or the face opening 12, and the conditioned air in the second passage 7 is always in the foot. The air will be blown to the opening 13 for use.
Next, details of the inside / outside air switching device 2a, which is a main part of the present invention, will be described with reference to the drawings. FIG. 1 shows a schematic perspective view seen from the direction A in FIG. FIG. 3 shows a detailed view of FIG. FIG. 4 shows a detailed perspective view of the inside / outside air switching box 2a of FIG. FIG.
FIG. 2 shows a detailed perspective view from the B direction in FIG.

As shown in FIGS. 1 and 3, the inside / outside air switching device 2a comprises an inside / outside air case 1a constituting the most upstream air side of the case 1 and a blower 3 housed in the inside / outside air case 1a. Has been done. The inside / outside air case 1a is formed of a resin material such as polypropylene, and forms an air passage by connecting the three divided cases 1b, 1c, and 1d (see FIG. 3).

The blower 3 is disposed substantially in the center of the inside / outside air case 1a, and includes the fan 3a and the fan 3a.
It is composed of an electric motor 3e which is a driving means for rotationally driving a. The blower 3 is arranged such that the axial direction of the drive shaft (not shown) of the electric motor 3e is orthogonal to the partition wall 5 described above. The above-mentioned fan 3a is attached to this drive shaft. The fan 3a has a first diameter different from that of the first fan 3a as shown in FIG.
The first fan 3b and the second fan 3c having a larger diameter than the first fan 3b are integrally formed.

The first and second fans 3b and 3c are
As shown in Fig. 1, centrifugal multi-blade fan (Sirocco fan)
In addition, the inside air or the outside air is sucked from the pair of suction ports 17 and 18 located on both sides of the electric motor 3e in the axial direction, and the air flow is generated outward in the radial direction of the fan. Then, these first fan 3b and second fan 3
c is housed in scroll-shaped scroll casing portions 24 and 25, the suction sides of which have a bellmouth shape. The respective end portions (air-blowing side) of the scroll casing portions 24, 25 are formed so as to communicate with the first passage 6 and the second passage 7, respectively. Also,
One end side of the scroll casing portions 24, 25 in the axial direction is shared with the partition portion 26.

That is, the partition 26 and the partition wall 5 partition the air streams generated by the first and second fans 3b and 3c so that they do not intersect with each other. The air flow generated in the fan 3b of the above is sent to the first passage 6, and the air flow generated in the second fan 3c is sent to the second passage 7. Further, as shown in FIG. 5, the electric motor 3e is fixed by three stays 27 to a wall portion 261 forming one surface on the suction side of the scroll casing portion 25. Thereby, the blower 3 is housed and fixed in the inside / outside air case 1a.

Incidentally, the first fan 3b and the second fan 3
The latter has a larger diameter with c because the stay 27 and the electric motor 3e are installed so as to partially block the suction port 18, so that it is difficult to obtain the air volume on the second passage 7 side. is there. In the inside / outside air case 1a, a first inside air inlet 19 and a second inside air inlet 21 opened on both sides in the axial direction of the electric motor 3e respectively corresponding to one suction port 17 and the other suction port 18. Are formed. And these 1st, 2nd inside air intakes 19 and 21 are 1st
Of the inside air intake 19 and the one intake port 17 corresponding to the first inside air intake 21, and the second inside air intake 21 and the other inside air intake 21 corresponding to the second inside air intake 21. The inside / outside air case 1a is formed so that the distance to the suction port 18 is substantially the same.

In the inside / outside air case 1a, a first communication passage 22 for connecting the first inside air intake 19 and the suction port 17, a second inside air intake port 21 and the suction port 18 are provided.
And a second communication passage 23 that communicates with.
Further, these first and second communication passages 22 and 23 are formed such that the flow direction of the air flowing inside is from the top direction to the ground direction.

Further, inside the inside / outside air case 1a, there is provided a third communication passage 100 which connects the upstream side of the first communication passage 22 and the upstream side of the second communication passage 23. The third communication passage 100 is provided so that air flows in the axial direction of the drive shaft of the electric motor 3d (vehicle front-rear direction) as shown in FIGS. 1 and 3. In the third communication passage 100, an outside air intake 20 for taking in outside air into the inside / outside air case 1a is formed. As shown in FIG. 3, the outside air intake port 20 is opened between the suction ports 17 and 18 and in a radially outward region of the fan, which is a connecting portion between the first fan 3b and the second fan 3c. Is formed in. In addition, the outside air intake 20 has a distance between the outside air intake 20 and the suction port 17, and the outside air intake 2
It is formed so that the distance between 0 and the suction port 18 is almost the same.

As shown in FIG. 4, the first inside air intake 19, the outside air intake 20, and the second inside air intake 21 are arranged along the axial direction of the rotating shaft of the electric motor 3e (vehicle front-rear direction). Are formed. In the inside / outside air case 1a, as an opening / closing means, a first switching door 28 for selectively connecting or blocking the first communication passage 22 and the third communication passage 100, and a second communication passage 23 and a second communication passage 23 are provided. A second switching door 29 that selectively connects or disconnects with the third communication passage 100 is provided. Then, the first switching door 28
Is provided between the outside air intake port 20 and the first inside air intake port 19, and the second switching door 29 is provided between the outside air intake port 20 and the second inside air intake port 19.
It is provided between the inside air intake 21 and the inside air intake 21.

The first and second switching doors 2 have a flat plate shape, and drive shafts 30 and 31 for driving these switching doors are attached to one end side. This drive shaft 3
In 0 and 31, the axial direction is the vehicle width direction (the inside / outside air switching device 2a
And the cooler unit 2b). Both ends of the drive shafts 30 and 31 in the axial direction are rotatably supported by the case 1a, so that the first,
The second switching doors 28 and 29 are adapted to operate in the range indicated by the arrow in FIG. In addition, these drive shafts 30,
31 is a servo motor (not shown) as a driving means.
Are connected to each other, and the first and second switching doors 28 and 29 are driven by the servo motor or the like to be in a predetermined inside / outside air mode.

Next, the first and second switching doors 28, 29
The operation in each of the inside / outside air mode will be described in order. FIG. 1 shows the first and second switching doors 28 and 29 in the all outside air mode.
Shows the operating position of. In this all-outside air mode, both the first and second fans 3b and 3c suck in outside air,
This is the inside / outside air mode in which the outside air is blown to both the passages 6 and 7. In this all-outside air mode, the first and second switching doors 2
8 and 29 are the first and second inside air intakes 19 and 2, respectively.
1 is fully closed (the first switching door 28 is in the operating position indicated by c in FIG. 3 and the second switching door 29 is in the operating position indicated by f in FIG. 3).

As a result, the outside air intake port 20 communicates with each of the suction ports 17 and 18 (the first communication passage 22 and the third communication passage 100 communicate with each other, and the second communication passage 23 and the third communication passage 23 communicate with each other. By communicating with the passage 100, the outside air taken in from the outside air intake port 20 is sent to both the first passage 6 and the second passage 7. Further, at this time, since the distance between the outside air intake port 20 and each of the intake ports 17 and 18 is substantially equal, the pressure loss in the flow path connecting the outside air intake port 20 and the intake port 17 and the outside air intake port 20 are The pressure loss in the flow path communicating with the suction port 18 becomes almost equal,
It is possible to blow air to the first and second passages 6 and 7 in good balance.

At this time, the first switching door 28 is connected to the opening edge 32 of the first inside air intake 19 and the second switching door 2
9 contacts (or press-contacts) the opening edge 33 of the second inside air intake port 21, so that the first and second inside air intake ports 19 and 21
This prevents inside air from entering the case 1a. Next, the all inside air mode will be described. FIG. 6 shows the operating positions of the first and second switching doors 28 and 29 in the all inside air mode.

This all-inside-air mode is an inside / outside air mode in which both the first and second fans 3b, 3c suck in the inside air and blow the inside air to the first and second passages 6, 7. In this total inside air mode, the first and second switching doors 28 and 29 fully open the first and second inside air intakes 19 and 21, respectively (the operation of the first switching door 28 shown by d in FIG. 3). Position, second
The switching door 29 of FIG. 3 is in the operating position indicated by e in FIG.

At this time, the first switching door 28 comes into contact (or pressure contact) with the wall portion 34 of the scroll casing portion 24 so that the first communication passage 22 and the third communication passage 100 are completely connected. To be shut off. This allows the suction port 17 to communicate only with the first inside air intake port 19. Further, the second switching door 29 comes into contact (or pressure contact) with the wall portion 26 of the scroll casing portion 25, so that the second communication passage 23 and the third communication passage 100 are completely shut off from each other. As a result, the suction port 18 communicates only with the second inside air intake port 21.

That is, the first and second switching doors 28, 29
The outside air intake port 20 and each suction port 17, 18 are closed by the first internal air intake port 19 and the suction port 17
And the second inside air intake 21 and the suction port 18 are communicated with each other, and the inside air taken in from the first and second inside air intakes 19 and 21 is the first passage 6 and the second inside 6 respectively.
Will be sent to the passage 7. At this time, the first
The pressure loss in the flow path communicating the inside air intake port 19 and the suction port 17 with the pressure loss in the flow path communicating the second interior air intake port and the suction port 18 are substantially equal to each other.
Air can be blown to the second passage in good balance.

Next, the two-layer flow mode will be described. Figure 7
The first and second switching doors 2 in this two-layer flow mode
8 and 29 show operating positions. The two-layer flow mode is an inside / outside air mode used in the foot mode and the foot differential mode in this embodiment. In the foot mode, the foot switching door 16 is at the position indicated by a in FIG.
The air flowing through the second passage 7 is always taken into the foot opening 13. On the other hand, the defroster opening 11 is slightly open, and the air flowing through the first passage 6 is always taken into the defroster opening 11. The same applies to the foot differential mode.

That is, in the two-layer flow mode, the inside air, which is likely to obtain the heating effect, is taken into the second passage 7 and the second passage 7 is used.
In this mode, the outside air is easily taken in to obtain the anti-fog effect, and the inside / outside air switching device 2a may take the outside air into the first passage 6 and the inside air into the second passage 7. Therefore,
As shown in FIG. 7, the first switching door 28 fully closes the first inside air intake 19, and the second switching door 29 fully opens the second inside air intake 21 (first The switching door 28 of FIG. 3 is at the position indicated by c in FIG. 3, and the second switching door 29 is shown in FIG.
Position indicated by middle e). That is, at the first switching door 28,
The first communication passage 22 and the third communication passage 100 are communicated with each other, the first inside air inlet 28 is fully closed, and the second communication passage 23 and the third communication passage are closed by the second switching door 29. 10
0 is cut off, and the second air intake 23 is fully opened.

As a result, the outside air intake port 20 and the suction port 17 communicate with each other, the second inside air intake port 21 and the suction port 18 communicate with each other, and the outside air enters the first passage 6.
The inside air is taken into the second passage 7. In this case, the first switching door 28 comes into contact (or pressure contact) with the opening edge 32 of the first inside air intake 19 so that the inside air does not enter the case 1 a from the first inside air intake 19. It is sealed to. Further, the second switching door 29 is brought into contact with (or pressure-contacted with) the wall portion 26 of the scroll casing portion 25, so that the intake port 1 is sucked from the outside air intake port 20.
8 is sealed so that air does not leak out.

Next, the layout of the inside / outside air switching device 2a of the present embodiment and the prior art (Japanese Patent Laid-Open No. 5-124426).
Table 1 shows the experimental results of the air volume in the layouts of and.
FIG. 8 shows a layout of an inside / outside air switching device similar to the conventional publication. The cooler unit and the heater unit are the same as those in the present embodiment, and the same reference numerals are given.

The inside / outside air switching device 2a 'is different from the above-described inside / outside air switching device 2a in the formation positions of the inside air inlets 40 and 41 and the outside air inlet 42. When this inside / outside air switching device operates in the total outside air mode, the switching door 43 fully opens the outside air intake 42 and fully closes the inside air intake 40. Further, the switching door 44 is the inside air intake 41
Fully close. As a result, in the all outside air mode, the outside air intake port 42 and one suction port 45 are close to each other,
Pressure loss is reduced.

On the other hand, the outside air intake port 42 and the other suction port 46 are separated from each other, and the outside air taken in from the outside air intake port 42 is sucked into the suction port 46 so as to wrap around through the communication passage 47. Therefore, the pressure loss becomes large. In other words, the balance between the first passage 6 and the second passage 7 is very poor, and it becomes difficult to obtain the required air volume in the defroster mode, which is used in the all outside air mode, for example.

[0057]

[Table 1] From this, it can be seen that the air volume is larger in the present embodiment particularly in the all outside air mode. This is because the air flow amount balance between the first passage 6 and the second passage 7 is very poor in the case of FIG. 8 as described above, whereas in the present embodiment, the outside air intake port 20 is It is considered that the first passage 6 and the second passage 7 are well balanced because the distances from the suction ports 17 and 18 are substantially the same. In addition, even in the all inside air mode,
Since the distance between each of the second inside air intakes 19 and 21 and each of the suction ports 17 and 18 is almost equal, the balance is good and a larger air volume can be obtained as compared with the case of FIG.

By configuring the inside / outside air switching device 2a as described above, for example, in the foot differential mode, the foot opening 13 and the defroster opening 1 are formed.
When the conditioned air is sent to the face opening 11 and the foot opening 13 in equal amounts, the first passage 6 and the second passage 7 have a good balance, and thus the air flow rate can be easily adjusted. Can be obtained.

Further, the first and second switching doors 28, 29
Since it is in contact with the scroll casing portions 24 and 25, it is not necessary to form a contacting portion, and a seal can be obtained with a simple structure. that's all,
Although the embodiment of the present invention has been described, the present invention can also be applied to the modifications described below. It should be noted that components having the same configuration are given the same reference numerals as above.

(Second Embodiment) In the inside / outside air switching device 2a shown in FIG. 9, the outside air intake port 20a is formed at one end of the fan 3a in the radial direction, and the third and fourth inside air is formed at the other end. Intakes 50, 51 are formed. And the outside air intake 2
No. 0a and the suction port 17a communicate with the fourth communication passage 4
8a, a fifth communication passage 49a that communicates the outside air intake port 20a and the suction port 18a, a sixth communication passage 48b that communicates the third inside air intake port 50 and the suction port 17a, and a fourth inside air intake port A seventh communication passage 49b is formed which connects 51 to the suction port 18a.

Further, third and fourth switching doors 28a and 29a, which are V-shaped butterfly doors, are provided at the air upstream side portions of the suction ports 17a and 18a.
The switching door 28a communicates the suction port 17a with the sixth communication passage 48b when it is in the solid line position in the figure, and the suction port 17a and the fourth communication channel 4 when it is in the alternate long and short dash line position in the figure.
Communicate with 8a. Further, the switching door 29a is provided with the suction port 18a and the seventh communication passage 4 when the switch door 29a is in the solid line position in the figure.
9b, and the suction port 18a and the fifth communication passage 49a are communicated with each other at the position indicated by the alternate long and short dash line in the figure.

(Third Embodiment) In each of the above embodiments, the first fan 3b and the second fan 3c have different diameters, but they may have the same diameter as shown in FIG. (Fourth Embodiment) As shown in FIG. 11, an electric motor 51
Is a double shaft motor 3f, and the first fan 3b,
The second fan 3c may be attached.

(Fifth Embodiment) As shown in FIG. 12, the second switching door 29 in the first embodiment may be a butterfly door 29b. In this case, the width of the inside / outside air switching device 2a in the vertical direction in FIG. 12 can be reduced. (Sixth Embodiment) As shown in FIG. 13, the inside / outside air switching device 2a includes an outside air intake 2 at an end on one radial side of the fan 3a.
No. 0a, the inside air intake 52 is formed at the other end, and the third and fourth switching doors 2 that are the same as those shown in FIG. 9 are provided at the air upstream side portions of the respective suction ports 17a, 18a.
8a and 29a are provided.

A high pressure loss first filter 53 capable of efficiently capturing pollen and dust is provided in the inside / outside air case 1a around the outside air intake 20a, and the inside / outside air case 1a around the inside air intake 52 is provided. A second filter 54 having a lower pressure loss than the first filter 53 is provided inside. That is, since pollen and dust in the outside air must be efficiently captured by the first filter 53, a high-pressure loss filter is used. Further, since the amount of dust and the like in the inside air is not so large, it suffices that the dust and the like in the inside air can be cleaned by the second filter 54 while the inside air is circulated several times, so a low-pressure loss filter is used. .

As described above, by providing the first filter 53 with high pressure loss at the portion of the outside air intake 20a and the second filter 54 with low pressure loss at the portion of the inside air intake 54, the switching door 28a In the two-layer flow mode in which the solid line position in the drawing and the switching door 29a in the one-dot chain line position in the drawing are used, dust and pollen in the outside air can be efficiently captured by the first filter 53, and the pressure loss of the second filter 54 It is possible to suppress the amount of decrease in the amount of air sucked in by the air as much as possible.

The first filter 53 and the second filter 54 may be filters having the same pressure loss. (Seventh Embodiment) As described above, since the amount of dust in the inside air is not so large, the second filter 54 shown in FIG. 13 may be omitted as shown in FIG. By doing so, the amount of intake air in the inside air can be increased as compared with the case where the second filter 54 is provided.

(Eighth Embodiment) In each of the above embodiments, the inside air is taken in through the outside air intake ports (20a, 20),
The outside air may be taken in through the inside air intake port (19, 21, 50 to 52).

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an inside / outside air switching device 2a according to a first embodiment of the present invention.

FIG. 2 is an overall schematic configuration diagram of the vehicle air conditioner of the embodiment.

FIG. 3 is a view taken in the direction of arrow A in FIG. 2;

FIG. 4 is a detailed view of an essential part of FIG.

5 is a view on arrow B of FIG. 2. FIG.

FIG. 6 is a view showing a state of an inside / outside air switching device 2a of the above embodiment in an all inside air mode.

FIG. 7 is a diagram illustrating a state of a two-layer flow mode of the inside / outside air switching device 2a of the embodiment.

FIG. 8 is a diagram showing a layout of an inside / outside air switching device 2a ′ similar to the conventional publication.

FIG. 9 is a schematic configuration diagram of an inside / outside air switching device 2a according to a second embodiment of the present invention.

FIG. 10 is a schematic configuration diagram of an inside / outside air switching device 2a according to a third embodiment of the present invention.

FIG. 11 is a schematic configuration diagram of an inside / outside air switching device 2a according to a fourth embodiment of the present invention.

FIG. 12 is a schematic configuration diagram of an inside / outside air switching device 2a according to a fifth embodiment of the present invention.

FIG. 13 is a schematic configuration diagram of an inside / outside air switching device 2a according to a sixth embodiment of the present invention.

FIG. 14 is a schematic configuration diagram of an inside / outside air switching device 2a according to a seventh embodiment of the present invention.

[Explanation of symbols]

 1a Inside / Outside air case 3 Blower 3b First fan (fan) 3c Second fan (fan) 3d Electric motor (motor) 5 Partition wall (partitioning member) 17 One suction port 18 The other suction port 19 First inside air Intake port (first air intake port) 20 Outside air intake port (third air intake port) 21 Second internal air intake port (second air intake port) 22 First communication passageway 23 Second communication passageway 28 First switching door (first opening / closing means) 29, 29a Second switching door (first opening / closing means) 30 Drive shaft (first opening / closing means) 31 Drive shaft (second opening / closing means) 100 Third Communication passage

Continued Front Page (72) Inventor Koji Nonoyama 1-1, Showa-cho, Kariya city, Aichi prefecture

Claims (10)

[Claims] 1. A case having a case for guiding air into a vehicle compartment, a fan housed in the case for generating an air flow directed to the vehicle compartment, and a motor for rotationally driving the fan. In addition, the fan has one and the other suction ports on both sides in the axial direction of the motor, and a fan configured to suck air from these suction ports and blow the air radially outward of the fan. A first passage through which air sucked from the one suction port is blown, and a second passage through which air sucked from the other suction port is blown in the case on the downstream side of the blower. A partition member for partitioning into a passage and a case, which is provided at a portion of the case corresponding to each of the suction ports, and opens at a predetermined interval in the axial direction of the motor. Both, first and second air inlets capable of taking in vehicle exterior air or vehicle interior air into the case, and the first air inlet provided in the case and the one suction port A first communication passage communicating with the second communication passage, the second communication passage provided in the case, the second communication passage communicating the second air intake port with the other suction port, and the second communication passage provided in the case. A third communication passage communicating between the first communication passage and the second communication passage; and a vehicle exterior air that is provided so as to open to the third communication passage and that is opposite to the first air intake port or At least one third air intake for taking in vehicle interior air into the case; and opening and closing means for opening and closing the first air intake, the second air intake, and the third air intake. An air conditioner for a vehicle, comprising: 2. The third air intake port is formed in the case such that at least a part of the third air intake port is radially outward of the fan and between the pair of suction ports. The vehicle air conditioner according to claim 1. 3. The case is formed so that the distance between each of the first and second air inlets and each of the corresponding suction ports is substantially the same. The vehicle air conditioner according to claim 1 or 2. 4. The opening / closing means includes a first opening / closing means and a second opening / closing means.
The first opening / closing means is provided between the first air intake opening and the third air intake opening, and the second opening / closing means includes the second opening / closing means. Is provided between the second air intake port and the third air intake port, and the first opening / closing means includes the first communication passage and the third air passage.
The first operating position in which the first air intake port is fully closed, the first communication passage and the third communication passage, and the first communication position. It is configured to selectively operate a second operating position in which the air intake port is fully opened, and the second opening / closing means includes the second communication passage and the third communication path.
And a third operating position in which the second air intake is fully closed, the second communication passage and the third communication passage are shut off, and the second communication passage is closed. The vehicle air conditioner according to any one of claims 1 to 3, wherein the air conditioner is configured to selectively operate in a fourth operation position in which the air intake is fully opened. 5. The first and second opening / closing means are constituted by plate-shaped switching doors that rotate about one end side as a drive fulcrum, and each of the first and second opening / closing means includes the first / second opening / closing means. In the first operating position and the third operating position, the first and second opening / closing means respectively come into contact with the opening edges of the first and second air intake ports over the entire circumference, When each of the first and second opening / closing means is in the second operating position and the fourth operating position, the first and second opening / closing means include a contact portion provided in the case. The air conditioner for a vehicle according to claim 4, wherein the air conditioner is in contact with the air conditioner. 6. The first air intake port and the second air intake port take in vehicle interior air into the case, and the third air intake port introduces vehicle exterior air into the case. The first and second opening / closing means are respectively in the second operating position and the fourth operating position, and the vehicle interior air is provided in both the first and second passages. And the first and second opening / closing means are in the first operating position and the third operating position, respectively, and air outside the vehicle compartment is provided in both the first and second passages. And the first and second opening / closing means are in the first operating position and the fourth operating position, respectively, and the outside air in the vehicle compartment and the second Switchable between two-layer flow mode that takes in vehicle interior air for communication Vehicular air conditioning apparatus according to claim 5, wherein the has ability. 7. An evaporator disposed in the first and second passages on the air downstream side of the blower to cool the passing air, and an evaporator disposed in the first and second passages on the downstream side of the evaporator. A heater core that is installed to heat the air that has passed through the evaporator; A defroster outlet for blowing out air toward the inner surface of the window glass of the vehicle and a face outlet for blowing out air to the upper half of the occupant of the vehicle. The vehicle air conditioner according to claim 6. 8. The vehicle air conditioner according to claim 5, wherein the abutting portion is a scroll casing portion that accommodates the fan and has a scroll shape. 9. The method according to claim 1, wherein the third air intake is formed between the first air intake and the second air intake. The vehicle air conditioner according to claim 1. 10. The first to third air intakes are:
10. The structure is formed along the axial direction.
An air conditioner for a vehicle as described in the above.