JP2002200916A - Air conditioner for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner for a vehicle capable of reducing the number of parts with a simple structure without separately requiring a blower or the like, and reducing power consumption by easily sending inside air toward a heat exchanger 18. SOLUTION: This conditioner comprises a blower 3, an outside air introducing passage 15 to introduce outside air to the blower 3 a heat exchanger 5 for heating, a heat exchanger 4 for cooling disposed on the downstream side of the blower 3, and air blow passages 8, 9, and 10 for properly sending air sent from the heat exchanger 4 for cooling and the heat exchanger 5 for heating to inside of a cabin. An inside air discharging passage 20 heat-exchangeable through a heat exchanger 18 is provided on an outside air introducing passage 15. One end of the inside air introducing passage 20 is communicated with the inside of the cabin, and the other end is communicated with an inner air discharging hole 24 as a negative pressure generating part formed in the rear part end surface of a getting-on/off door 22.

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 a vehicle, and more particularly, to an air conditioner for a vehicle having a high heating effect capable of taking in latent heat of air in a vehicle compartment into the outside air.

[0002]

2. Description of the Related Art Conventionally, as this type of vehicle air conditioner, there has been known an air conditioner disclosed in Japanese Patent Application Laid-Open No. H10-16531 as shown in FIG. The vehicle air conditioner 100 includes a first air passage 104 extending from an outside air inlet 102 to a defroster outlet air passage 103 and a second air passage 104 extending from an inner air inlet 105 to a foot outlet air passage 106.
Ventilation path 107 and inside air discharge path 1 for discharging inside air out of the vehicle compartment
08. The vehicle air conditioner 100
In a mode in which outside air is introduced into the first air passage 104 and inside air is introduced into the second air passage 107, heat is absorbed from inside air that is introduced and sent from the inside air discharge blower 110 and flows through the inside air discharge passage 108, and the outside air inlet 102. And a heat exchanger 109 for radiating heat to the outside air introduced from the outside. The first air passage 104
And the air flowing through the second ventilation path 107
The air is sent by a blower 111 having 11A and 111B. As described above, in the vehicle air conditioner 100 shown in FIG. 4, by using the heat exchanger 109 to absorb the heat of the inside air and radiate it to the outside air, the temperature of the outside air is increased, and the heat generated by the introduction of the outside air is increased. The loss is reduced to improve the heating effect.

As another conventional example, an air conditioner for a vehicle equipped with one blower as shown in FIG. 5 is known. The vehicle air conditioner 200 has an outside air inlet 2
02 to the defroster outlet air passage 203
An air passage 204, a second air passage 207 extending from the inside air inlet 205 to the foot outlet air passage 206, and an inside air discharge passage 208 for discharging inside air to the outside of the vehicle compartment are provided. Further, in the vehicle air conditioner 200, when in a mode in which outside air is introduced into the first air passage 204 and inside air is introduced into the second air passage 207, the air is introduced from the inside air introduction port 205 and sent out from the fan 211 B of the blower 211. The heat exchanger 209 absorbs heat from the inside air flowing through the inside air discharge passage 208 and releases heat to the outside air introduced from the outside air inlet 202. The first
The air flowing through the air passage 204 and the second air passage 207 is 1
Fan 21 for introducing outside air provided in two blowers 211
1A and a fan 211B for exhausting inside air. The outside air and the inside air are partitioned by a partition 212 formed in the unit case.

[0004]

However, in the vehicle air conditioner 100 shown in FIG. 4, in addition to the air conditioner blower 111, an inside air discharge blower 110 for sending inside air to the heat exchanger 109 is provided. This necessitates the problem that the device unit becomes large and heavy, and the power consumption increases.

The vehicle air conditioner 2 shown in FIG.
00, one blower 211 has a fan 2 for introducing outside air.
11A and a fan 211B for exhausting inside air are provided in two stages, and a partition 212 for separating outside air and inside air sent by the respective fans 211A and 211B is provided in the unit case. There is a problem that becomes.

Accordingly, an object of the present invention is to provide an air conditioner for a vehicle which has a simple structure, can reduce the number of parts, and can reduce power consumption.

[0007]

SUMMARY OF THE INVENTION The features of the present invention include a blower, an outside air introduction passage for introducing outside air to the blower, a cooling heat exchanger disposed downstream of the blower, and a cooling heat exchanger. What is claimed is: 1. An air conditioner for a vehicle, comprising: a heating heat exchanger disposed downstream; and a cooling heat exchanger and an air blowing passage for appropriately sending air sent from the heating heat exchanger to a room side. The outside air introduction passage is provided with an inside air discharge passage capable of exchanging heat via a heat exchanger, and one end of the inside air introduction passage communicates with the vehicle interior, and the other end communicates with the vehicle exterior negative pressure generating unit. is there.

[0008] In the invention having such a configuration, the outside air introduced into the outside air introduction passage is sent to the blower through the heat exchanger while being warmed by exchanging heat with the inside air in the inside air discharge passage. You. In this way, the air sent from the blower is
Since it is warmed, it has the effect of improving the heating performance and reducing the load on the heating heat exchanger. In addition, the inside air in the inside air discharge passage has a negative pressure effect at the vehicle exterior burden generating portion,
Since the pressure in the cabin due to the introduction of outside air is higher than the outside pressure of the vehicle, the vehicle can be easily discharged to the outside of the vehicle. For this reason, a special blower or the like is not required to send out the inside air to the heat exchanger side, so that an increase in the weight of the vehicle air conditioner can be prevented.

[0009] As the negative pressure generating portion on the outside of the vehicle, a negative pressure generating portion such as a rear end face of a door for getting on and off or a rear side of a door mirror can be applied. By forming a passage for discharging inside air in the doors for entry and exit and the door mirror in this way, the doors and door mirrors also have the function of discharging moisture in the doors and door mirrors.

[0010]

According to the first aspect of the present invention, the operation of the negative pressure at the vehicle exterior burden generating portion and the fact that the pressure in the vehicle interior due to the introduction of outside air is higher than the vehicle external pressure. Since the inside air can be easily discharged to the outside of the vehicle, a special blower or the like is not required for sending the inside air to the heat exchanger side, thereby preventing an increase in the weight of the air conditioner for a vehicle and a blower. Since only one is required, there is an effect of reducing the number of parts.

According to the second aspect of the present invention, there is an effect that the water inside the door for getting on and off can be discharged together with the inside air.

According to the third aspect of the invention, in addition to the effect that the water inside the door mirror can be discharged together with the inside air, it is possible to obtain the effect of preventing the mirror surface from fogging.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of an air conditioner for a vehicle according to the present invention will be described below based on embodiments shown in the drawings.

(Embodiment 1) FIG. 1 is an explanatory view showing a vehicle air conditioner 1 according to Embodiment 1 of the present invention. As shown in FIG. 1, the vehicle air conditioner 1 includes a blower (blower) 3 and a cooling heat exchanger (evaporator) in a unit case 2 forming an air passage for sending air toward a vehicle interior. 4 and a heat exchanger (heat core) 5 for heating. The cooling heat exchanger 4 is arranged downstream of the blower 3. The heating heat exchanger 5 is disposed downstream of the cooling heat exchanger 4. In addition, the cooling heat exchanger 4
An air mix door 6 for distributing air passing through the cooling heat exchanger 4 is provided on the downstream side. Downstream of the air mix door 6 and the heating heat exchanger 5, an air mix chamber 7 for mixing cold air and hot air is formed. And the wind that passed through the air mix chamber 7
It is controlled by opening and closing doors 11, 12, and 13 that open and close the passages 8, 9, and 10 that communicate with various outlets, and is appropriately sent to the passages 8, 9, and 10 according to each air conditioning mode. I have. The passage 8 is set to communicate with the ventilator duct, the passage 9 is set to communicate with the defroster port, and the passage 10 is set so as to communicate with the foot opening.

As shown in FIG. 1, an opening / closing door 14 for controlling the introduction of outside air or inside air is provided on the side of the blower 3. An outside air introduction passage 15 is provided upstream of the blower 3. An opening / closing door 16 for controlling the supply of outside air to the blower 3 is provided in the outside air introduction passage 15.
Is provided. The outside air introduction passage 15 communicates with the outside air introduction port 17 via a heat exchanger 18.

Further, an inside air inlet 19 is provided on the other side (or lower part) of the unit case 2.
The inside air inlet 19 communicates with an inside air discharge passage 20 formed in the unit case 2. This inside air inlet 1
9 is provided with an opening / closing door 21. The inside air discharge passage 20 is provided between the outside air introduction passage 15 and the heat exchanger 1.
8 intersect. Further, as shown in FIG. 1, the inside air discharge passage 20 is provided with
The inside air discharge passage 23 formed in the inside 2 communicates with the inside air discharge passage 23. The entry / exit door 22 has an inside air discharge hole 24 formed therein so as to communicate with the inside air discharge passage 23. FIG. 1 shows a state in which the entrance / exit door 22 is closed. By closing the entrance / exit door 22 in this manner, the inside air discharge passages 20 and 23 are closed.
The inside air can be discharged from the inside air discharge hole 24 by communicating with each other. Reference numeral 25 in the figure indicates a seal member between the door 23 for getting on and off and the body 26.

As described above, in the vehicle air conditioner 1, the heat exchanger 18 is disposed on the upstream side of the blower 3 separately from the inside / outside air selection unit by the opening / closing door 14. For this reason,
The latent heat of the inside air introduced from the inside air inlet 19 is used for the heat exchanger 1.
The outside air introduced from the outside air introduction port 17 can be warmed and sent to the blower 3 through 8. For this reason, in the heating mode, the heating performance can be further improved by controlling the opening / closing door 14 to block the introduction of the outside air and introducing the outside air only from the outside air inlet 17. Since the indoor pressure is higher than the vehicle external pressure due to the introduction of outside air, the inside air blown from the inside air inlet 19 is naturally discharged from the inside air discharge hole 24 at the rear of the door 22 for getting on and off.

The air conditioner 1 for a vehicle according to the first embodiment.
Since the pressure difference between the indoor pressure and the outside pressure of the vehicle due to the introduction of the outside air is used, a separate blower for sucking the inside air is not required, so that the weight of the device unit and the energy saving can be achieved. The function of the blower 3 is as follows.
Since the outside air or the inside air introduced from the outside air introduction passage 15 and the opening / closing door 14 is sent to the cooling heat exchanger 4,
Only one fan is required. For this reason, in the first embodiment, it is possible to reduce the number of parts of the vehicle air conditioner 1. Further, the inside air discharge hole 24
Are arranged and formed in the lower part, so that the inside air discharge passage 23 is formed.
There is an advantage that moisture in the door 22 for getting on and off can be discharged by the inside air flowing through the door.

(Embodiment 2) FIG. 2 is an explanatory diagram of a vehicle air conditioner 30 according to Embodiment 2 of the present invention. As shown in FIG. 2, the vehicle air conditioner 30 includes a single blower 32 and a cooling heat exchanger 33 in a unit case 31 forming an air passage for sending air toward a vehicle interior.
And a heat exchanger 34 for heating. The cooling heat exchanger 33 is arranged downstream of the blower 32. The heating heat exchanger 34 is arranged downstream of the cooling heat exchanger 33. On the downstream side of the cooling heat exchanger 33,
An air mix door 35 that distributes air passing through the cooling heat exchanger 33 is provided. Downstream of the air mix door 35 and the heat exchanger 34 for heating, an air mix chamber 36 for mixing cold air and hot air is formed. The wind passing through the air mix chamber 36 is controlled by opening and closing doors 40, 41, 42 for opening and closing the passages 37, 38, 39 communicating with the various outlets, and the passages 37, 38 according to each air conditioning mode. , 39 as appropriate. The passage 37 is set to communicate with the ventilator duct, the passage 38 is set to communicate with the defroster port, and the passage 39 is set so as to communicate with the foot port.

As shown in FIG. 2, an opening / closing door 43 for controlling the introduction of outside air or inside air is provided on the side of the blower 32. An outside air introduction passage 44 is provided on the upstream side of the blower 32. This outside air introduction passage 44
Inside, an opening / closing door for controlling supply of outside air to the blower 32 side is provided. The outside air introduction passage 44 communicates with an outside air introduction port 46 via a heat exchanger 47.

Further, an inside air inlet 48 is provided on the other side (or lower part) of the unit case 31.
The inside air inlet 48 communicates with an inside air discharge passage 49 formed in the unit case 31. The inside air inlet 48 is provided with an opening / closing door 50. The inside air in the inside air discharge passage 49 exchanges heat with the air passing through the outside air introduction passage 44 via the heat exchanger 47. Further, as shown in FIG. 2, the inside air discharge passage 49 communicates with a door mirror 52 provided on a door 51 for getting on and off the vehicle. Door mirror 52
Is formed with a gap 52B for discharging inside air through a gap 52A communicating with the inside air discharge passage 49. Reference numeral 53 in the figure denotes a sealing member between the door 51 for getting on and off and the body 54.

As described above, in the air conditioner 30 for a vehicle, the heat exchanger 47 is arranged upstream of the blower 47 separately from the inside / outside air selecting section by the opening / closing door 43, so that the air is introduced from the inside air inlet 48. The latent heat of the inside air is transferred to the heat exchanger 47.
, The outside air introduced from the outside air inlet 46 can be warmed and sent to the blower 47. For this reason, the blower 47
The air sent out to the cooling heat exchanger 33 is warmed, and in the case of the heating mode, the open / close door 43
To shut off the introduction of outside air, and
By introducing from only 6, heating performance can be further improved. Since the indoor pressure is higher than the vehicle external pressure due to the introduction of outside air, and a negative pressure is generated on the rear side of the door mirror 52 as the vehicle travels, the inside air blown from the inside air inlet 48 is reduced by the inside mirror 52. Is naturally discharged from the gap 52B.

The vehicle air conditioner 3 according to the second embodiment.
Even at 0, since a pressure difference between the indoor pressure and the vehicle external pressure accompanying the introduction of outside air is used, a separate blower for sucking inside air is not required. For this reason, in the second embodiment, it is possible to reduce the weight and energy consumption of the device unit. Further, since the function of the blower 32 is to send outside air or inside air introduced from the outside air introduction passage 46 and the introduction portion near the opening / closing door 43 to the cooling heat exchanger 33, only one fan is required. For this reason, in the second embodiment, it is possible to reduce the number of components of the vehicle air conditioner 30. Further, the door mirror 52 can be expected to have an effect of suppressing fogging of the mirror as the inside air is discharged. In addition, it becomes possible to remove the water in the door mirror 52 with the exhaust of the inside air.

Although the first and second embodiments have been described above, the present invention allows various design changes accompanying the gist of the configuration. For example, in the first and second embodiments, the inside air is discharged from the inside air discharge hole 24 of the door 22 for getting on and off and the gap 52B of the door mirror 52. However, the inside air is discharged from another negative pressure generating portion of the vehicle. Of course, the configuration may be good. For example, as shown in FIG. 3, the inside air discharge passages 20 and 49 in the first and second embodiments described above are provided in the intake-side passage 61 in the engine 60 as a negative pressure generation unit.
May be connected so as to communicate with each other. By introducing the inside air into the intake-side passage 61 of the engine 60 in this manner, the engine intake air temperature can be increased, so that the efficiency of the engine can be increased.

[Brief description of the drawings]

FIG. 1 is a first embodiment of a vehicle air conditioner according to the present invention.
FIG.

FIG. 2 is a second embodiment of the vehicle air conditioner according to the present invention.
FIG.

FIG. 3 is an explanatory view showing a modified example of the vehicle air conditioner according to the present invention.

FIG. 4 is an explanatory view showing a conventional vehicle air conditioner.

FIG. 5 is an explanatory view showing another conventional vehicle air conditioner.

[Description of Signs] 1 Vehicle air conditioner 2 Unit case 3 Blower 4 Cooling heat exchanger 5 Heating heat exchanger 15 Outside air introduction passage 17 Outside air introduction port 18 Heat exchanger 19 Inside air introduction port 20 Inside air discharge passage 22 Getting on and off Door 23 Inside air discharge passage 24 Inside air discharge hole (vehicle outside negative pressure generating section) 30 Vehicle air conditioner 31 Unit case 32 Blower 33 Cooling heat exchanger 34 Heating heat exchanger 44 Outside air introduction passage 46 Outside air introduction port 47 Heat exchanger 48 Inside air inlet 49 Inside air discharge passage 52 Door mirror 52B Crevice (vehicle outside negative pressure generating section)

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hidenobu Arakawa 5-24-15 Minamidai, Nakano-ku, Tokyo Calso Nick Kansei Corporation (72) Inventor Jun Hatakeyama 5-24-15 Minamidai, Nakano-ku, Tokyo Calso Inside Nick Kansei Corporation (72) Inventor Satoshi Ogiwara Inside Calsonic Nick Kansei Corporation 5-24-15 Minamidai, Nakano-ku, Tokyo

Claims (3)

[Claims] 1. A blower (3, 32) and said blower (3, 32)
An outside air introduction passage (15, 44) for introducing outside air to 32).
A cooling heat exchanger (4, 33) disposed downstream of the blower (3, 32); and a cooling heat exchanger (4, 3).
Heating heat exchanger (5, 34) arranged downstream of 3)
And air blowing passages (8, 9, 10, 37, 38) for appropriately sending air sent from the cooling heat exchangers (4, 33) and the heating heat exchangers (5, 34) to the indoor side. ,
39), the heat exchanger (18, 30) is provided in the outside air introduction passage (15, 44).
47), the inside air discharge passage (2) which is made heat-exchangeable through
0, 44), one end of the inside air introduction passage (20, 44) communicates with the vehicle interior, and the other end of the inside air introduction passage (20, 44).
52B). The air conditioner for a vehicle (1, 30), which is in communication with the air conditioner (52). 2. The outside negative pressure generating section (24, 52A).
Is an inside air discharge hole (2) formed in the rear end face of the door for getting on and off.
The vehicle air conditioner (1) according to claim 1, wherein the condition (4) is satisfied. 3. The outside negative pressure generating section (24, 52A).
Is a gap (52) formed on the rear surface side of the door mirror 52.
The vehicle air conditioner (30) according to claim 1, wherein B).