JPH0680010A - Vehicular air conditioner - Google Patents

Abstract

PURPOSE:To introduce outside air and inside air respectively to a passage in which outside air in a duct is introduced and a passage in which inside air is introduced by sucking the outside air and the inside air by means of an air blower. CONSTITUTION:A centrifugal type air blower 3 has an inside and outside separating guide 8 in a scroll part 7 of a scroll case 4. In an air intake port 10 on one side surface of the scroll case 4, the first opening 11 where outside air can be introduced to the upper side is provided, and the second opening 12 where inside air is sucked in to the lower side is provided. The lower side of a duct 2 is used as the first passage 18 in which the outside air is introduced to be blown off mainly to the window or the upper half of the body of an occupant, and the upper side is used as the second passage 19 in which the inside air is introduced to be blown off mainly to the foot side of the occupant. The outside air sucked in from the first opening 11 passes through mainly inside the guide 8, and is introduced to the first passage 18, and the inside air sucked in from the second opening 12 passes through mainly outside the guide 8, and is introduced to the second passage 19.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a passage (first passage) for introducing outside air (outside air) and a passage (second passage) for introducing inside air (inside air) into a duct. The present invention relates to a vehicle air conditioner.

[0002]

2. Description of the Related Art As an air conditioner provided with a passage for introducing outside air into a duct and a passage for introducing inside air, for example, a technique disclosed in JP-A-60-8105 is known. This air conditioner has 1
It has two centrifugal blowers driven by one motor. The outside air can be introduced into one of the blowers so that the outside air can be introduced into the passage in the duct, and the inside air can be introduced into the other blower so that the inside air can be introduced into the passage in the duct. It was being done.

[0003]

However, in the technique described above, since the air conditioner has two blowers mounted, the space for mounting the blowers becomes large, and it may be difficult to mount the blowers. In addition, the weight of the blower increases and the cost also increases.

The present invention has been made in view of the above circumstances, and an object thereof is to guide the outside air and the inside air into a passage into which the outside air is introduced and a passage into which the inside air is introduced by one blower, respectively. It is to provide an air conditioner for a vehicle.

[0005]

The vehicle air conditioner of the present invention employs the following technical means. The vehicle air conditioner includes a duct for sending air toward the vehicle compartment, and a blower provided upstream of the duct to generate an air flow toward the vehicle compartment. And a second passage through which air in the vehicle compartment is introduced. The blower includes a scroll case including a scroll portion, a guide that divides the inside of the scroll case into an inner peripheral side and an outer peripheral side along a scroll shape, and is housed inside the scroll case. And a second opening for sucking the air outside the vehicle compartment, and an air suction port of the scroll case for sucking the air outside the vehicle compartment. The air is mainly introduced into the first passage, and the air sucked from the second opening is mainly introduced into the second passage.

[0006]

When the blower operates, the centrifugal fan rotates to suck the outside air through the first opening and the inside air through the second opening. The outside air sucked into the scroll case through the first opening is mainly guided to the first passage through one of the outer peripheral side and the inner peripheral side of the scroll section defined by the guide.
Further, the inside air sucked into the scroll case through the second opening is guided to the second passage mainly through the other of the outer side or the inner side of the skull roll section partitioned by the guide.

[0007]

As described above, in the vehicle air conditioner of the present invention, the air inlet of the scroll case is divided into the first opening for introducing the outside air and the second opening for introducing the inside air. By partitioning the inside of the scroll portion with the guide, the outside air sucked from the first opening is mainly sent to the first passage and the second passage.
The inside air sucked from the opening can be mainly guided to the second passage. That is, the outside air and the inside air can be sucked by one blower, and the outside air and the inside air can be introduced into the first passage into which the outside air is introduced and the second passage into which the inside air is introduced, respectively. And since only one blower is required, the space for installing the blower is smaller than before, making it easier to install the blower, reducing the weight of the blower, and lowering the cost of the blower. become.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a vehicle air conditioner of the present invention will be described based on an embodiment shown in the drawings. [Configuration of Embodiment] FIGS. 1 to 15 are for explaining a first embodiment of the present invention. FIG. 1 is a schematic configuration diagram of a duct of an air conditioner, and FIG. It is a perspective view of the mounted state. The vehicle air conditioner 1 of this embodiment is mounted on, for example, an electric vehicle, and includes a duct 2 that forms an air passage for sending air toward the interior. A blower 3 is connected to the upstream end of the duct 2 to generate an air flow toward the room inside the duct 2.

As shown in FIG. 3, the blower 3 is a centrifugal blower, and includes a scroll case 4 formed in a scroll shape, a sirocco type centrifugal fan 5 housed in the scroll case 4, and a scroll case. 4 and a motor 6 that rotates and drives a centrifugal fan 5. Then, when the motor 6 drives the centrifugal fan 5, air is sucked into the scroll case 4 from the air suction port 10 provided on the side surface of the scroll case 4, and the sucked air passes through the scroll portion 7 to move to the scroll case 4. Blow into the duct 2 from the outlet. In the scroll portion 7 of the inside of the scroll case 4 that guides the blown air from the centrifugal fan 5 to the outlet, a guide 8 that divides the scroll portion 7 into an inner peripheral side and an outer peripheral side according to the scroll shape is provided. It is provided integrally with 4. This guide 8
As shown in FIGS. 4 and 5, the upstream end 8a is at a position shifted by 180 ° from the nose position 4a of the scroll case 4, that is, an extension of the nose position 4a and the drive shaft of the motor 6. A V-shaped notch 9 is provided at the upstream end of the guide 8. The notch 9 suppresses the generation of noise and improves the separability of the inside air and the outside air.
The length L1 of the notch 9 is set to be approximately half the length L of the guide 8. Further, the shape of the guide 8 is not necessarily limited to the V shape, and may be changed according to requirements such as the die splitting of the scroll case.

Further, the air suction port 1 of the scroll case 4
0 has a first opening 11 that mainly guides the sucked air to the inner peripheral side of the guide 8 and a second opening 12 that mainly guides the sucked air to the outer peripheral side of the guide 8. As shown in FIG. 3, the first opening 11 is provided with an inside / outside air switching means 13 for switching the sucked air between the outside air and the inside air. The inside / outside air switching unit 13 includes an inside / outside air switching box 16 provided with an inside air introduction port 14 into which the inside air is introduced and an outside air introduction port 15 into which the outside air is introduced. The inside / outside air switching unit 13 includes an inside / outside air switching damper 17, and the inside / outside air switching damper 17 can switch the air sucked by the first opening 11 of the blower 3 between the inside air and the outside air. In addition, the second opening 12
, Which always sucks only the inside air, communicates with the passenger compartment.

The blower 3 constructed as described above sucks the outside air or the inside air selected by the inside / outside air switching means 13 from the first opening 11 of the air suction port 10, and the scroll portion 7 on the inner peripheral side of the guide 8. The lower side of the duct 2 (the first described later)
The internal air discharged to the passage 18) and sucked from the second opening 12 is discharged to the upper side (the second passage 19 described later) in the duct 2 from the scroll portion 7 on the outer peripheral side of the guide 8. It should be noted that the upper side and the lower side in the text refer to the upper side and the lower side in a state where the vehicle air conditioner 1 is mounted on a vehicle as shown in FIG. 2.

Upstream of the duct 2, a first passage 18 for introducing the outside air or the inside air blown from the inside of the guide 8 of the blower 3 and a second passage 18 for introducing the inside air blown from the outside of the guide 8 of the blower 3 are introduced. 19 and this first passage 1
8 and the second passage 19 are separated by a first partition wall 20. The first passage 18 of the present embodiment is provided below the second passage 19 when the duct 2 is mounted on the vehicle. As a result, the first opening 11 of the blower 3 is provided above the second opening 12, and the air sucked from the first opening 11 is guided to the first passage 18 on the upstream lower side of the duct 2 and then from the second opening 12. The sucked air is guided to the second passage 19 on the upstream side of the duct 2.

Inside the duct 2, cooling means 21 for cooling all of the air passing through the first passage 18 and a part of the air passing through the second passage 19 is arranged. A cooling bypass passage 22 is provided above the cooling means 21 in the duct 2 so that a part of the air passing through the second passage 19 bypasses the cooling means 21. Further, downstream of the cooling means 21 in the duct 2, a heating means 23 for heating all the air that has passed through the cooling bypass passage 22 and a part of the air that has passed through the cooling means 21 is arranged. Below the heating means 23 in the duct 2, a heating bypass passage 24 is provided in which a part of the air passing through the cooling means 21 bypasses the heating means 23. A cooling damper 25 that opens and closes the heating bypass passage 24 is provided in the heating bypass passage 24. By closing the heating bypass passage 24 by the cool damper 25, all the air that has passed through the cooling means 21 is heated. Pass 23.

Further, in this embodiment, the air passing through the cooling means 21 and the air passing through only the heating means 23 without passing through the cooling means 21 are separated downstream of the cooling means 21 in the duct 2. A second partition wall 27 is provided. Then, the heating means 23 is arranged in the duct 2 while penetrating the second partition wall 27. Further, downstream of the second partition wall 27, in the defroster mode, a diff mode opening 28 is provided for guiding the air passing through only the heating means 23 to a defroster outlet 31 described later. The differential mode opening 28 is provided with a differential mode damper 26 for opening and closing the differential mode opening 28, and an operation panel 5 to be described later.
It is provided to open the differential mode opening 28 when the defroster mode is selected by the blowout mode changeover switch 51 of No. 2.

At the downstream end of the duct 2, there is formed a blowout port for blowing out the air passing through the duct 2 toward each part in the room. The outlet is a center face outlet 29 that mainly blows cool air toward the upper half of the occupant from the center of the front of the passenger compartment, and both sides of the front of the passenger compartment toward the upper half of the passenger or the window glass of the side. It includes a side face outlet 30 that blows cold air to the front, a defroster outlet 31 that mainly blows warm air toward the front window glass, and a foot outlet 32 that mainly blows warm air toward the feet of the occupant. Then, in the duct 2, the side face outlet 3
A center face damper 33, a defroster damper 34, and a foot damper 35 that control the air flow to each of the air outlets are provided in the air passages leading to the air outlets other than 0.

The cooling means 21 of this embodiment is a refrigerant evaporator of the refrigeration cycle 36, and the heating means 23 of this embodiment is a refrigerant condenser of the refrigeration cycle 36. An example of the refrigeration cycle 36 used in this embodiment is shown in the refrigerant circuit diagram of FIG. The refrigerating cycle 36 of the present embodiment is an accumulator cycle, and in addition to the refrigerant evaporator (cooling means 21) and the refrigerant condenser (heating means 23), the outdoor heat exchanger 37, the refrigerant compressor 38, the decompression device 39, the accumulator. 40, and a flow path switching means 41 for switching the flow direction of the refrigerant.
The outdoor heat exchanger 37 exchanges heat between the outside air and the refrigerant outside the duct 2, and includes an outdoor fan 42 and an outside air shutter 43. The refrigerant compressor 38 sucks, compresses, and discharges the refrigerant, and is driven by an electric motor 44. The refrigerant compressor 38 is arranged in the sealed case 45 integrally with the electric motor 44. The rotation speed of the electric motor 44 that drives the refrigerant compressor 38 is variable under the control of the inverter 46, and the change in the rotation speed of the electric motor 44 changes the refrigerant discharge capacity of the refrigerant compressor 38. In addition, the vehicle air conditioner 1 of the present embodiment,
The blowout temperature is controlled by a change in capacity due to a change in the rotation speed of the refrigerant compressor 38. Pressure reducing device 39
Is an expansion valve for decompressing and expanding the refrigerant flowing into the refrigerant evaporator (cooling means 21), and is provided so as to adjust the supercool amount of the refrigerant condenser (heating means 23) during dehumidifying operation, for example. The refrigerant flow path switching unit 41 switches the flow direction of the refrigerant between the cooling operation, the heating operation, and the dehumidifying operation. Specifically, a four-way valve 47 that switches the discharge direction of the refrigerant compressor 38 to the outdoor heat exchanger 37 or the refrigerant condenser (heating means 23), the refrigerant evaporator (cooling means 2 during heating operation).
The solenoid valve 48 for bypassing 1), an electromagnetic three-way valve 49 for bypassing the refrigerant condenser (heating means 23) during the cooling operation, and a check valve for restricting the flow direction of the refrigerant.

The flow path switching means 41 switches the flow of the refrigerant as follows in accordance with the cooling operation, the heating operation and the dehumidifying operation. Refrigerant compressor 3 during cooling operation
The discharged refrigerant of 8 is a four-way valve 47 → an outdoor heat exchanger 37 →
Bypassing the refrigerant condenser (heating means 23) → pressure reducing device 39
→ Refrigerant evaporator (cooling means 21) → Four-way valve 47 → Accumulator 40 → Refrigerant compressor 38 (see arrow C in the figure). During the heating operation, the refrigerant discharged from the refrigerant compressor 38 is bypassed by the four-way valve 47 → refrigerant condenser (heating means 23) → pressure reducing device 39 → refrigerant evaporator (cooling means 21) → outdoor heat exchanger 37 (outdoor). Fan 42 ON, outside air shutter 43
Open) → 4-way valve 47 → Accumulator 40 → Refrigerant compressor 3
Flow in the order of 8 (see arrow H in the figure). During the dehumidifying operation, the refrigerant discharged from the refrigerant compressor 38 is supplied with the four-way valve 47 → refrigerant condenser (heating means 23) → pressure reducing device 39 → refrigerant evaporator (cooling means 21) → outdoor heat exchanger 37 (outdoor fan 42OFF). , Outside air shutter 43 closed) → four-way valve 47 → accumulator 40
→ Flow in the order of the refrigerant compressor 38 (see arrow D in the figure).

The blower 3, the inverter 46 of the electric motor 44, the outdoor fan 42, the four-way valve 47, the electromagnetic opening / closing valve 4 described above.
The controller 50 controls the energization of electrical components such as 8, the electromagnetic three-way valve 49, each damper, and an actuator (not shown) that drives the outside air shutter 43. Control device 5
0 controls energization of each electric component in accordance with an operation signal of an operation panel 52 (see FIG. 7) operated by an occupant, and the operation panel 52 is installed at a position where operability is good in a room. The operation panel 52 includes a blow mode switching switch 53 for setting each blow mode, an air volume setting switch 54 for setting the amount of air blown into the room from the duct 2, a cooling / heating switch 55 for instructing start and stop of the refrigeration cycle 36, and dehumidification. A dehumidifying switch 56 for giving an instruction and a temperature adjusting lever 57 for adjusting the temperature of air blown into the vehicle interior are provided. The blowout mode changeover switch 53 is a face mode switch 53a for discharging the air in the duct 2 toward the upper half of the occupant, a relatively cool air to the upper half of the occupant, and a bi-level for discharging relatively warm air to the occupant's feet. It comprises a mode switch 53b, a foot mode switch 53c for ejecting relatively warm air mainly to the feet of an occupant, and a diff mode switch 53d for ejecting relatively warm air mainly to the windshield. In addition, the air conditioning heating switch 55,
The refrigerant compressor 38 of the refrigeration cycle 36 is turned on and off. When both the heating / cooling switch 55 and the face mode switch 53a are simultaneously operated, the refrigeration cycle 3
6 performs cooling operation, and bi-level mode switch 5
3b, any one of the foot mode switch 53c and the diff mode switch 53d, and the cooling / heating switch 55 are simultaneously operated, the refrigeration cycle 36 is provided to perform heating operation. Further, the inside / outside air switching means 1
The inside / outside air switching damper 17 of No. 3 selects inside air when the face mode switch 53a is selected, and selects outside air when the other bilevel mode switch 53b, the foot mode switch 53c and the diff mode switch 53d are selected. In this embodiment, the inside / outside air is switched according to the blowing mode, but the inside / outside air may be switched by a manual operation. The temperature adjusting lever 57 sets the rotation speed of the refrigerant compressor 38 according to the set position. For example, as the temperature adjusting lever 57 is moved to the cool side during the cooling operation, the refrigerant compressor 38 is cooled.
The rotation speed of the refrigerant compressor 38 is increased, and conversely, the rotation of the refrigerant compressor 38 is increased as the refrigerant compressor 38 is moved to the hot side during the heating operation and the dehumidifying operation.

[Operation of Embodiment] Next, the operation of the above embodiment will be described. (Cooling operation in face mode, see FIG. 8) The occupant selects the face mode with the face mode switch 53a of the operation panel 52, the air conditioning switch 55 is turned on, the air volume setting switch 54 is turned on, and the temperature adjusting lever 57 is cooled. When set to the side, the refrigeration cycle 36
Performs the cooling operation, the inside / outside air switching damper 17 automatically selects the inside air, and the first opening 11 of the blower 3 sucks the inside air, and the second opening 12 also sucks the inside air. First opening 11
The more sucked inside air passes through the upper second passage 19 upstream of the duct 2, but since the foot outlet 32 and the differential mode opening 28 are closed, all of the inside air is cooled by the cooling means 21. Further, in this mode, the cool damper 25 is opened, and the center face damper 33 and the side face outlet 30 are opened. Therefore, the cold air passing through the heating means 23 that has been bypassed or stopped is the center face outlet 29 and the side face. The air is blown from the air outlet 30 to the upper body of the occupant. By changing the setting position of the temperature adjusting lever 57, the rotation speed of the refrigerant compressor 38 changes, and the blowout temperature is, for example, about 3 to 1.
It varies in the range of 5 ° C.

(Dehumidifying operation in face mode, see FIG. 9)
When the dehumidifying switch 56 is turned on in the above operation mode,
The refrigeration cycle 36 performs the dehumidifying operation, and the inside / outside air switching damper 17 automatically selects the outside air so that the first opening 11 sucks the outside air and the second opening 12 sucks the inside air. The outside air sucked from the first opening 11 is mainly guided to the first passage 18,
It is cooled and dehumidified through the cooling means 21. Second opening 1
The inside air sucked from 2 is mainly guided to the second passage 19, and at this time as well, the foot outlet 32 and the differential mode opening 2
Since 8 is closed, all the air that has passed through the second passage 19 passes through the cooling means 21 and is cooled and dehumidified. Further, in this mode, the cool damper 25 is closed, the center face damper 33 and the side face air outlet 30 are opened, and the heating means 23 is operating, so that the cold air passing through the cooling means 21 causes the heating means 23 to operate. Reheated through. Then, the reheated and dehumidified air is blown to the upper half of the occupant from the center face outlet 29 and the side face outlet 30. By changing the setting position of the temperature adjusting lever 57, the rotation speed of the refrigerant compressor 38 changes, and the blowout temperature is, for example, about 10 to 10.
It varies in the range of 30 ° C.

(Dehumidifying operation in bi-level mode, see FIG. 10) When the bi-level mode is selected and the dehumidifying switch 56 is turned on, the refrigeration cycle 36 performs dehumidifying operation and the inside / outside air switching damper 17 is automatically operated. The outside air is selected, the first opening 11 sucks the outside air, and the second opening 12 sucks the inside air. The outside air sucked from the first opening 11 is mainly guided to the first passage 18 and passes through the cooling means 21 to be cooled and dehumidified. Further, the inside air sucked from the second opening 12 is mainly guided to the second passage 19, is partially cooled and dehumidified through the cooling means 21, and the other inside air is heated through the heating means 23. In this mode, the cool damper 25 is closed,
Center face damper 33, side face outlet 3
0, since the foot damper 35 is opened, the cooling means 2
The air that has passed through 1 (outside air and inside air) is all heating means 23.
And is reheated through the center face outlet 29 and the side face outlet 30 to be blown to the upper body of the occupant. Further, the inside air that has passed only the heating means 23 is blown out from the foot outlet 32 to the feet of the occupant. Then, by changing the setting position of the temperature adjusting lever 57, the rotation speed of the refrigerant compressor 38 is changed, and the blowout temperatures of the center face outlet 29 and the side face outlet 30 are in the range of about 15 to 30 ° C., for example. And the outlet temperature of the foot outlet 32 changes in the range of, for example, about 30 to 45 ° C. In the present embodiment, the division ratio between the upper layer and the lower layer of the heating means 23 is approximately 2: 1, and the difference between the temperature of the inside air sucked in the upper layer and the temperature immediately after the refrigerant evaporator (cooling means 21) of the lower layer is approximately. Since it is 20 °, the vertical temperature difference can be about 15 ° when the cool damper 25 is closed. In addition, in the present embodiment, the example in which the cool damper 25 is closed in the bi-level mode is shown.
The opening may be opened or the opening may be adjusted to provide a large difference between the temperature blown to the feet and the temperature blown to the upper body.

(Bi-level mode heating operation) When the bi-level mode is selected and the dehumidifying switch 56 is turned off, the refrigeration cycle 36 performs heating operation and cooling in the above-described bi-level mode dehumidifying operation. Means 2
Only the operation of 1 stops. As a result, the air (outside air and inside air) blown from the center face outlet 29 and the side face outlet 30 to the upper body of the occupant becomes warm air that has passed through the heating means 23. Further, the inside air blown to the feet is the same inside air circulation heating as in the dehumidifying operation in the above-mentioned bilevel mode.

(Foot mode dehumidification operation, see FIG. 11)
The foot mode is selected and the dehumidification switch 56
When is turned on, the refrigeration cycle 36 performs the dehumidifying operation, the inside / outside air switching damper 17 automatically selects the outside air, and the first opening 11 sucks the outside air and the second opening 12 sucks the inside air. The outside air sucked through the first opening 11 is mainly the first passage 1
It is guided to 8 and passed through the cooling means 21 to be cooled and dehumidified. The inside air sucked through the second opening 12 is mainly guided to the second passage 19 and partially cooled and dehumidified through the cooling means 21, and the other air is heated through the heating means 23. In this mode, the cool damper 25 is closed, the side face outlet 30, the defroster damper 34, and the foot damper 35.
Is opened, all the air (outside air and inside air) passing through the cooling means 21 is reheated through the heating means 23,
Side face outlet 30 and defroster outlet 31
Then, it is blown out toward the window glass of the vehicle or a part of the occupant's upper body. Further, the inside air that has passed only the heating means 23 is blown out from the foot outlet 32 to the feet of the occupant. Then, by changing the setting position of the temperature adjusting lever 57, the rotation speed of the refrigerant compressor 38 changes,
Side face outlet 30 and defroster outlet 31
For example, changes in the range of about 25 to 45 ° C, and the temperature of the foot outlet changes in the range of, for example, about 30 to 50 ° C.

(Foot mode heating operation) When the foot mode is selected and the dehumidifying switch 56 is turned off,
In the above-described foot mode dehumidifying operation, the refrigeration cycle 36 performs the heating operation, and only the operation of the cooling means 21 is stopped. As a result, the air (outside air and inside air) blown from the side face outlet 30 and the defroster outlet 31 to the window glass and the upper body of the occupant is heated by the heating means 2.
It becomes warm air that passed through 3. In this case, the wind blown from the side face outlet 30 and the defroster outlet 31 is rich in the outside air with respect to the foot outlet 32, and therefore the possibility of fogging of the window glass is extremely low. Also,
The inside air blown to the feet is the same inside air circulation heating as in the above dehumidifying operation in the foot mode.

(Dehumidifying operation in differential mode, see FIG. 12) The differential mode is selected and the dehumidifying switch 56 is turned on.
Then, the refrigeration cycle 36 performs the dehumidifying operation, the inside / outside air switching damper 17 automatically selects the outside air, and the first opening 11 sucks the outside air and the second opening 12 sucks the inside air. The outside air sucked through the first opening 11 is mainly the first passage 18
Is guided to and is all cooled and dehumidified through the cooling means 21.
The inside air sucked through the second opening 12 is mainly guided to the second passage 19, partially cooled and dehumidified through the cooling means 21, and the other air is heated through the heating means 23. In this mode, the cool damper 25 is closed and the defroster damper 3
4 and the differential mode damper 26 are opened, all the air (outside air and inside air) that has passed through the cooling means 21 is reheated through the heating means 23, and the side face outlet 3
0 and the defroster outlet 31 from the window glass of the vehicle,
Alternatively, some of them are blown out toward the upper body of the occupant. In addition, since the foot damper 35 is closed and the differential mode damper 26 is opened, the inside air that has passed through only the heating means 23 passes through the differential mode opening 28 and is discharged from the side face outlet 30 and the defroster outlet 31 to the vehicle window. It is blown out toward the glass or part of the upper body of the occupant.
Then, by changing the setting position of the temperature adjusting lever 57, the rotation speed of the refrigerant compressor 38 changes, and the blowout temperatures of the side face outlet 30 and the defroster outlet 31 are in the range of, for example, about 30 to 50 ° C. Change.

(Heating operation in differential mode) When the differential mode is selected and the dehumidifying switch 56 is turned off, the refrigeration cycle 36 performs the heating operation in the above dehumidifying operation in the differential mode, and only the cooling means 21 operates. Stop. As a result, the air (outside air and inside air) blown from the side face outlet 30 and the defroster outlet 31 to the window glass and the upper body of the occupant becomes warm air that has passed through the heating means 23.

Next, in the heating operation in the foot mode,
To prevent fogging of window glass,
Comparison technology and comparison technology in which outside air and inside air are mixed and heated
A comparison will be made with reference to FIGS. 13 to 15. Well
Without, heating operation by 100% outside air in foot mode
And test results by heating operation in which the outside air and the inside air are mixed
Is shown below. The outside temperature is 0 ° C and the outside humidity is 90 ~.
95%, 5 passengers, refrigeration cycle 36 refrigerant evaporator (cold
Refrigerant condenser 21 (heating means 2)
According to 3), heating operation is performed with the indoor average of 25 ° C.
Air blown out from the vehicle air conditioner 1 with 100% outside air
The amount is 160m³/ H (1 at 48 ° C from the foot outlet 32
00m³/ H, at 38 ° C from the side face outlet 30
40m³/ H, 20 at 40 ° C from the defroster outlet 31
m³/ H), as shown in FIG.
Front glass 61, front side glass 62, rear glass
No fogging on the side glass 63 and rear glass 64)
Yes. Note that% in the figure is the relative humidity near each window glass.
It However, it is necessary to raise the low temperature outside air.
Therefore, the heating load is large in heating with 100% of the outside air.
It has a defect. The outside air and the inside air are mixed, and the
The air volume of the air conditioner 1 is 160m³/ H (foot blowing
Mouth 32 to 100 m at 48 ° C³/ H, side face blow
40m at 27 ° C from exit 30³/ H, defroster outlet
20m from 31 to 36 ° C³/ H), the proportion of shy air is 9
0m³/ H, the indoor humidity will be significantly higher.
As shown in Fig. 2, almost the entire surface of the windshield 61 and the
Fogging occurs on a part of the side glass 63 of the yarn.
In this way, both the outside air and the inside air are mixed and guided to the duct 2.
When the heater is turned on and the heating operation is performed, the heating load is
It can be reduced to 60% or less, but the window glass becomes cloudy.
It had a problem that occurred. Next, let the outside air go
And occupant's upper body, shyness to feet, car
The blowing air volume of the dual-use air conditioner 1 is 190 m³/ H (Foot
120m at 51 ° C inside air from the outlet 32³/ H, side
45 m at 31 ° C outside air from face outlet 30 ³/ H, de
25m at 34 ° C outside air from froster outlet 31³/ H)
At this time, the humidity near the windshield 61 is as shown in FIG.
You can improve to the same level as 100% outside air.
It As a result, the rear part of the rear side glass 63 is slightly clouded.
Stain only occurs, suppressing the occurrence of fogging on other window glass
You can In this way, the refrigerant evaporator (cooling means 2
Even if it is not the dehumidification operation that activates 1)
Minimized and should cloudiness occur, or
Dehumidify when you want to remove moisture according to the feeling of the user
If you operate it, you can dehumidify only the upper body and efficient heating
it can.

[Effects of Embodiment] Blower 3 shown in this embodiment
Can guide the air sucked from the upper side of the blower 3 to the lower side of the duct 2, and can guide the air sucked from the lower side of the blower 3 to the upper side of the duct 2. Therefore, even when the lower side of the duct 2 is the outside air and the upper side of the duct 2 is the outside air due to the position of the outlet and the design restrictions of the inside of the duct 2 as in the present embodiment, the upper side of the blower. It is possible to guide the outside air mainly to the lower side of the duct 2 and mainly the inside air to the upper side of the duct 2 while further sucking the outside air and sucking the inside air from the lower side. That is, even if the outside air is guided to the lower side of the blower 3 or the outside air and the inside air guided to the duct 2 are not twisted by 180 ° and guided to the inside of the duct 2, the blower 3 of the present embodiment is used. The outside air sucked from the upper side of the fan 2 can be mainly guided to the lower side of the duct 2, and the inner air sucked from the lower side of the blower 3 can be mainly guided to the upper side of the duct 2. Also,
The vehicle air conditioner 1 can suck the outside air and the inside air from one of the air intake sides of the blower 3 to guide the outside air and the inside air to the first passage 18 and the second passage 19, respectively. Therefore, the space for guiding the outside air to the blower 3 and the space for guiding the inside air to the blower 3 are
Since only one blower 3 is required on one side, the installation space of the blower 3 is smaller than that of the conventional one, the ease of mounting the blower 3 on the vehicle is facilitated, and the weight of the blower 3 can be reduced. Furthermore, the manufacturing cost of the blower 3 can be kept low. Further, in the present embodiment, since the outside air having low humidity is blown onto the window glass during the heating operation in the foot mode, it is possible to suppress the occurrence of fogging on the window glass. By performing the dehumidifying operation in the foot mode, the humidity blown to the window glass is further reduced, and the occurrence of fogging on the window glass can be further suppressed with almost no effect on the blowout temperature at the feet. On the other hand, the warm air blown to the feet sucks and heats warm inner air, so that the heating load can be reduced to 60% or less compared to 100% of outside air. As a result, in an electric vehicle that generates almost no excess heat, it is possible to heat the interior of the vehicle by consuming a small amount of heating energy and suppressing fogging of the window glass. Even during the cooling operation, part or all of the cooled inside air in the room is sucked and cooled, so that the energy and load required for cooling can be suppressed as compared with 100% outside air.

[Second Embodiment] FIG. 16 is a sectional view of the blower 3 and the inside / outside air switching means 13 according to a second embodiment. The second opening 12 of the present embodiment is provided with the first opening 11 so as to be able to suck the outside air selected by the inside / outside air switching means 13, and the inside / outside air switching box 16 is provided with the first opening 11 and the second opening. 12 is also covered. Then, the inside / outside air switching means 13 includes a second inside air introducing port 65 for guiding the inside air to the second opening 12 below the inside / outside air switching box 16, and assists to close the second inside air introducing port 65 inside. Damper 6
6 is provided. The auxiliary damper 66 is used for the second inside air introduction port 6
5 is opened, the air suction port 10 of the blower 3 is partitioned into upper and lower parts, and the inside air sucked from the second inside air introduction port 65 is drawn into the second opening 1
The outside air or the inside air selected by the inside / outside air switching damper 17 is led to the first opening 11. The outside air is passed through the second opening 12 to the second passage 19 (see the first embodiment).
By introducing the above, it is possible to improve the dehumidification performance and the ventilation performance in the vehicle compartment when the heating load is small, for example, in the intermediate period.

[Modification] In the present embodiment, an example in which the air conditioner is installed in an electric vehicle has been shown, but it is driven by an internal combustion engine, particularly a diesel engine that has a high thermal efficiency and a small amount of heat radiated to the engine cooling water that serves as a heater heat source. It may be installed in an automobile. Although the refrigerant condenser is shown as an example of the heating means, other heating means such as a hot water heater core, an electric heater, or a combustion heater may be used. First in the duct
An example of the passage is shown below the second passage.
The passages may be arranged side by side, or conversely, the first passage may be provided above the second passage. The layout of the cooling means and the heating means in the duct and the presence / absence of the cooling bypass passage and the heating bypass passage are not limited to those in the present embodiment, and all air provided with a duct that separates and inhales outside air and inside air It can be applied to a harmony device.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a duct of a vehicle air conditioner (first embodiment).

FIG. 2 is a perspective view of a vehicle air conditioner mounted on a vehicle.

FIG. 3 is a cross-sectional view of a blower.

FIG. 4 is a top view of a guide.

FIG. 5 is a side view of the guide.

FIG. 6 is a refrigerant circuit diagram of a refrigeration cycle.

FIG. 7 is a front view of an operation panel.

FIG. 8 is an operation explanatory diagram of the cooling operation in the face mode.

FIG. 9 is an operation explanatory diagram of a dehumidifying operation in face mode.

FIG. 10 is an operation explanatory diagram of bilevel mode operation.

FIG. 11 is an operation explanatory diagram of foot mode operation.

FIG. 12 is an operation explanatory view of the defroster operation.

FIG. 13 is an explanatory diagram of a cloudy state of a window during heating operation with 100% outside air.

FIG. 14 is an explanatory diagram of a cloudy state of a window during heating operation in which outside air and inside air are mixed.

FIG. 15 is an explanatory diagram of a cloudy state of a window during a heating operation in which outside air is blown to the window glass and inside air is blown to the feet.

FIG. 16 is a cross-sectional view of a blower and an inside / outside air switching unit (second embodiment).

[Explanation of Codes] 1 Air Conditioner for Vehicle 2 Duct 3 Blower 4 Scroll Case 5 Centrifugal Fan 7 Scroll Section 8 Guide 10 Air Suction Port 11 First Opening 12 Second Opening 18 First Passage 19 Second Passage

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tadashi Suzuki 1-1, Showa-cho, Kariya city, Aichi prefecture Nihondenso Co., Ltd.

Claims (2)

[Claims] 1. A duct for sending air toward a vehicle compartment, and a blower provided upstream of this duct for generating an air flow toward the vehicle compartment, wherein air outside the vehicle compartment is introduced into the duct. In a vehicle air conditioner that includes a first passage that is opened and a second passage that leads to air inside the vehicle, the blower includes a scroll case that includes a scroll portion, and the scroll portion that is formed inside the scroll case along a scroll shape. And a centrifugal fan housed inside the scroll case, and a first opening for sucking air outside the vehicle compartment into an air suction port of the scroll case, and The second for inhaling air in the passenger compartment
An air conditioner for a vehicle, comprising an opening, and mainly guiding the air sucked from the first opening to the first passage and the air sucked from the second opening mainly to the second passage. . 2. The first passage is provided below the second passage, and the first opening is provided above the second opening when the duct is mounted on a vehicle.
The vehicle air conditioner according to claim 1.