JP2003211940A - Air conditioner for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To materialize an air conditioner for a vehicle capable of reducing flow resistance of air passing a heat exchanger for cooling by constructing an air passage connecting to each opening part to form a cooled air bypass passage over an air conditioning case. <P>SOLUTION: The air conditioning case 11 constructs an air passage communicating to a defroster opening part 21 and a face opening part 24 with forming the defroster opening part 21 over an evaporator 12 and forming the cooled air bypass passage 15 at a part higher than a roughly central part in a height direction of the evaporator 12. Consequently, flow resistance of air passing the evaporator can be reduced. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air conditioner, and more particularly to the structure of an air passage communicating with each air outlet opening formed in an air conditioning case.

[0002]

2. Description of the Related Art Conventionally, as a vehicle air conditioner of this type,
It has a heat exchanger for cooling and a heat exchanger for heating, and the blowout temperature is adjusted by the air mix door for the air flow rate ratio between the hot air passing through the heat exchanger for heating and the cold air bypassing the heat exchanger for heating. Then, the conditioned air is blown out to the air outlets opening at various places in the vehicle interior. An air conditioning case that forms an air passage using a so-called air mix type temperature control method is often used.

For example, generally, Japanese Patent Laid-Open No. 9-226349.
In the vehicle air conditioner described in this publication, a cooling heat exchanger and a heating heat exchanger are installed downstream of the cooling heat exchanger in the air conditioning case. Thus, a cold air bypass passage, which bypasses the heating heat exchanger and through which cool air flows, and a warm air passage, which passes through the heating heat exchanger, are formed.

Further, in the air-conditioning case, an air mixing portion is formed above the downstream side of the heating heat exchanger to mix cold air from the cold air bypass passage and hot air from the hot air passage.
Then, a defroster opening for blowing out to the defroster outlet above the downstream side of the air mixing section, for blowing out to the face outlet on the side downstream of the air mixing section and facing the outlet of the cooling heat exchanger. A foot opening for blowing out to the face opening and the foot outlet is formed, and door switching means for opening and closing these openings is installed.

The door switching means is rotated to open and close the desired openings to blow out temperature-controlled conditioned air from the outlets into the passenger compartment according to the blowing mode.

[0006]

However, in the above conventional device, the defroster opening is formed above the air conditioning case between the cooling heat exchanger and the heating heat exchanger. For this reason, in order to prevent the cool diff that the cold air before mixing the cold air and the warm air blows out to the conditioned air that is blown out from the defroster opening, the cold air bypass passage is generally close to the upper part of the heating heat exchanger. As described above, the heat exchanger for cooling is formed at a height position corresponding to the central portion in the height direction.

That is, by sufficiently separating the cold air bypass passage from the defroster opening in the height direction, an air mixing portion is formed to prevent cool diff. However, when the cool air bypass passage is lowered to the lower side, in the face mode in which the cool air that has passed through the cooling heat exchanger is blown out from the face outlet, the cool air that has passed through the upper portion of the cooling heat exchanger is Since it is configured to pass through the cooling air heat exchanger by the partition wall with the ventilation passage leading to the defroster opening and then to pass through the cooling air bypass passage, there is a problem that the ventilation resistance of this ventilation passage becomes large. is there.

Further, since the rotating shaft of the air mix door for opening and closing the cold air bypass passage is generally installed close to the upper part of the heating heat exchanger, for example, a drive for driving the air mix door. When an actuator such as a servo motor, which is a means, is fixed to the side wall of the air conditioning case, the fixing hole of the actuator may not be fixed because it overlaps with the heating heat exchanger.

Therefore, an object of the present invention is to solve the above-mentioned problems, and to construct an air passage communicating with each opening so as to form a cool air bypass passage above the air conditioning case, thereby providing a cooling air conditioner. An object of the present invention is to provide a vehicle air conditioner capable of reducing the ventilation resistance of the air volume passing through the exchanger.

[0010]

In order to achieve the above object, the technical means described in claims 1 to 6 is adopted. That is, according to the first aspect of the invention, an air conditioning case (11) forming an air passage for guiding the conditioned air to the air outlets opening at various places in the vehicle compartment, and the air conditioning case (1)
1) A heat exchanger for cooling, which is installed inside and cools air (1
2) and a heating heat exchanger (13) installed downstream of the air flow of the cooling heat exchanger (12) to heat the air.
And a hot air passage (17) formed in the air conditioning case (11) and passing hot air through the heat exchanger (13) for heating,
The heat exchanger for heating (1) is formed in the air conditioning case (11).
Cold air bypass passage (15) that bypasses 3) and cool air flows
And the hot air passage (1
The air mix door (1) for adjusting the air volume ratio between the air volume passing through (7) and the air volume passing through the cold air bypass passage (15).
6), an air mixing section (20) formed in the air-conditioning case (11) for mixing hot air passing through the hot air passage (17) and cold air passing through the cold air bypass passage (15), and this air. An air mixing part (20), which is formed on the downstream side of the mixing part (20) and is connected to a face outlet for blowing the conditioned air toward the head of the passenger in the vehicle compartment.
And a defroster opening portion (21) formed on the downstream side of the vehicle and connected to a defroster outlet that blows the conditioned air to the front window glass of the vehicle, the air conditioning case (11) includes a heat exchange for cooling. The defroster opening (21) is formed above the air conditioner (12), and the cold air bypass passage (15) is formed above the approximate center of the cooling heat exchanger (12) in the height direction to form the defroster opening. (2
1) and an air passage communicating with the face opening (24).

According to the first aspect of the present invention, the defroster opening (21) is formed above the cooling heat exchanger (12), and the cooling heat exchanger (12) is substantially in the height direction. By forming the cool air bypass passage (15) above the center, for example, in the face mode in which the conditioned air is blown from the face outlet in the blowout mode, the cool air passing through the upper portion of the cooling heat exchanger (12). It is possible to reduce the ventilation resistance that passes through the cold air bypass passage (15) and reaches the face opening (24). Thereby, the amount of cold air can be secured.

Further, by forming the defroster opening (21) above the cooling heat exchanger (12), even if the cold air bypass passage (15) is formed above the air conditioning case (11), the air mixing section is formed. Since (20) can be secured, it is possible to prevent cool diff that blows cold air before mixing from the defroster opening (21).

According to the second aspect of the present invention, in the air conditioning case (11), the air mix door (16) which opens and closes the cold air bypass passage (15) apart from the upper end of the heating heat exchanger (13) is opened. The rotary shaft (16c) is installed, and the drive means (1) is provided to directly drive the rotary shaft (16c).
8) is configured.

According to the second aspect of the present invention, the drive means (18) for driving the air mix door (16) avoids the heating heat exchanger (13) generally on the side wall of the air conditioning case (11). Fixed in the fixed position. Therefore, in the present invention, the rotation shaft (16c) is installed away from the heating heat exchanger (13), whereby the mounting range of the drive means (18) can be expanded. Further, the drive means (18) is configured to directly drive the drive shaft and the rotary shaft (16c) of an actuator such as a servo motor, so that the rotary shaft (16c) is conventionally connected via the link mechanism. Since the link mechanism can be eliminated as compared with the driving method, the number of parts can be reduced and the manufacturing cost can be reduced.

According to the third aspect of the present invention, in the air conditioning case (11), the air inflow portion (14) for taking in the conditioned air from the blower unit upstream of the cooling heat exchanger (12).
And a defroster switching door means (2) for opening and closing the defroster opening (21) above the air inflow part (14).
It is characterized in that the rotary shaft (23c) of 3) is installed.

According to the third aspect of the present invention, the rotation shaft (23c) is installed on the air inflow portion (14) side, so that the defroster opening (21) is opened from the air mixing portion (20). ) Can be installed without the rotating shaft (23c) interfering with the ventilation path, so that the ventilation resistance of the conditioned air flowing through this ventilation path can be reduced.

In the fourth aspect of the present invention, in the air conditioning case (11), the air inflow portion (14) for taking in the conditioned air from the blower unit upstream of the cooling heat exchanger (12).
A blower bypass passage (30) is formed from the air inlet (14) to the defroster opening (21), and the air taken in from the air inlet (14) bypasses the cooling heat exchanger (12). It is characterized in that it is configured to blow out to the face opening (24).

According to the fourth aspect of the present invention, for example, when the outside air temperature in spring or autumn is in the middle period, and when the blower unit is set to the outside air mode, the cooling heat exchanger (12) is bypassed. The outside air can be blown out from the face outlet in the same temperature and humidity condition. This can reduce, for example, the cooling odor of the conditioned air that has passed through the cooling heat exchanger (12).

The invention according to claim 5 is characterized in that the blower bypass passage (30) is provided with a switching door means (23, 31) for opening and closing the blower bypass passage (30).

According to the fifth aspect of the present invention, since the switching door means (23, 31) is installed, for example, in the face blowing mode when the outside air temperature is below the set temperature or close to the set temperature. Then, the switching door means (23, 31) is automatically operated to move the blower bypass passage (3
By controlling so that (0) is opened, the effect described in claim 5 is obtained.

According to the sixth aspect of the invention, the switching door means (23, 31) allows the air inflow portion (14) and the face opening portion (24) to communicate with each other when the face opening portion (24) opens. At the same time, when the defroster opening (21) is opened, the air inflow portion (14) and the defroster opening (21) are closed.

According to the sixth aspect of the invention, the outside air bypassing the heat exchanger (12) for cooling is specifically kept in the temperature and humidity state only when the face opening (24) is opened. Can be blown out from the face outlet. Therefore, when the defroster opening (21) is opened, it is possible to prevent cool differential by not blowing out the outside air.

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

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION (First Embodiment) A first embodiment of the present invention will be described below with reference to FIGS. The ventilation system of the vehicle air conditioner of the present embodiment is roughly classified into a blower unit (not shown) and the air conditioning unit 10 shown in FIG.
It is divided into two parts. The blower unit is arranged offset from the central part to the passenger seat side in the lower part of the instrument panel in the vehicle compartment.
0 is arranged in a substantially central portion in the vehicle left-right direction in the lower portion of the instrument panel in the vehicle compartment.

As is well known, the blower unit is composed of an inside / outside air switching box for introducing and switching between inside air (air inside the vehicle) and outside air (air outside the vehicle), and a blower for sucking and blowing air through the inside / outside air switching box. ing. Air conditioning unit 10
Is an evaporator 12 which is a heat exchanger for cooling and a heater core 13 which is a heat exchanger for heating in one common air conditioning case 11.
Both are integrated types.

The air-conditioning case 11 is made of a resin molded product, such as polypropylene, which has a certain degree of elasticity and is excellent in strength. The air-conditioning case 11 is specifically composed of a plurality of divided cases. The plurality of divided cases accommodate the heat exchangers 12 and 13 and devices such as a door described later, and then a fastening means such as a metal spring clip and a screw. The air-conditioning unit 10 is configured by being integrally combined with each other.

The air conditioning unit 10 is arranged in a substantially central portion of the lower part of the instrument panel in the passenger compartment in the form shown in FIG. 1 in the front-rear, left-right and up-down directions of the vehicle, and the An air inflow portion 14 is formed at a portion on the vehicle front side. The conditioned air blown from the blower unit described above flows into the air inflow portion 14.

The air inflow portion 14 in the air conditioning case 11
The evaporator 12 is arranged at the part immediately after. The evaporator 12 has a thin shape in the vehicle front-rear direction and is vertically arranged so as to traverse the passage in the air conditioning case 11. Therefore, the blown air from the air inflow portion 14 flows into the front surface of the evaporator 12 extending in the vehicle vertical direction. As is well known, the evaporator 12 absorbs latent heat of vaporization of the refrigerant in the refrigeration cycle from the conditioned air to cool the conditioned air.

A heater core 13 is arranged on the downstream side of the air flow of the evaporator 12 (on the rear side of the vehicle) at a predetermined interval. The heater core 13 is arranged on the lower side in the air conditioning case 11 so as to be inclined toward the vehicle rear side. The heater core 13 reheats the cold air that has passed through the evaporator 12, hot hot water (engine cooling water) flows therein, and heats air using the hot water as a heat source.

In the air passage in the air-conditioning case 11, above the heater core 13, a cool air bypass passage 15 for bypassing the heater core 13 and flowing cold air, and a hot air passage for passing warm air through the heater core 13. And 17 are formed.

In each of the cold air bypass passage 15 and the hot air passage 17, a flat plate for adjusting the mixing ratio of the hot air heated by the heater core 13 and the cold air that passes through the cold air bypass passage 15 and bypasses the heater core 13. A shaped air mix door 16 is arranged.

Here, in the present embodiment, the cold air bypass passage 15 is formed so as to be positioned above the substantial center in the height direction of the evaporator 12, and the cold air passing through the upper part of the evaporator 12 is especially cold air. The bypass passage 15 is configured so as to generate an air flow without wraparound, as indicated by an arrow in the figure.

Further, the air mix door 16 for opening and closing the cold air bypass passage 15 is a rotary shaft 1 arranged in a horizontal direction.
6c, which is integrally coupled with the rotating shaft 16c and is rotatable in the vehicle vertical direction together with the rotating shaft 16c. The air mix door 16 serves as temperature adjusting means for adjusting the temperature of the air blown into the vehicle compartment by adjusting the mixing ratio.

The rotating shaft 16c is rotatably supported by the air conditioning case 11, and one end of the rotating shaft 16c projects outside the air conditioning case 11 and is driven by a driving means as shown in FIG. It is directly coupled to a drive shaft (not shown) of a servo motor 18 and is rotationally driven by a control device (not shown). The servo motor 18 is fixed to the side wall of the air conditioning case 11 with a fixing screw 18a.

In the air conditioning case 11, on the air downstream side of the heater core 13 (the portion on the vehicle rear side), a wall surface 19 extending vertically is formed at a predetermined interval from the heater core 13 and is integrated with the air conditioning case 11. It is molded. With this wall surface 19, the hot air passage 1 is provided immediately after the heater core 13.
The hot air is guided upward through the circulation of 7.

In the air conditioning case 11, an air mixing section 20 for mixing cold air and warm air is formed on the air downstream side (upper side) of the cold air bypass passage 15 and the hot air passage 17.

In the upper part of the air conditioning case 11 above the evaporator 12 at the downstream end of the air mixing part 20, a defroster opening 21 is formed at the front end side of the vehicle so as to open upward in the front direction of the vehicle. Has been done. The defroster opening 21 is for the temperature-controlled air to flow in from the air mixing section 20, and is connected to a defroster outlet (not shown) via a separate defroster duct 22. The conditioned air is blown toward the inner surface of the windshield.

The defroster opening 21 is opened and closed by a defroster door 23 which is a flat butterfly type defroster switching door means. This defroster door 23
Is installed above the air inflow portion 14 on the upstream side of the defroster opening 21 and is horizontally arranged in a recess above the air inflow portion 14 in the vicinity of the upper surface of the air conditioning case 11.
It is rotatably supported by 3c.

Next, a face opening 24 slightly projecting to the rear side of the vehicle is formed at a portion on the vehicle rear side (closer to the occupant) than the defroster opening portion 21. The face opening 24 is temperature controlled. Conditioned air is the air mixing section 2
Flowed in through 0.

The face opening 24 is connected via a face duct (not shown) to a face outlet located above the central portion in the left-right direction of the instrument panel, and from this outlet, the passenger in the central portion of the vehicle compartment. It is configured to blow out conditioned air toward the head.

The face opening 24 is opened and closed by a flat face door 25. This face door 25
Is installed on the upstream side of the face opening 24 and is rotatably supported by a rotary shaft 25c arranged in the horizontal direction.

A foot opening 26 is formed in a portion of the face opening 24 on the vehicle lower side, and the temperature-controlled conditioned air is formed in the foot opening 26.
Flowed in through 0. Foot passages 27 are provided on the left and right sides of the foot opening 26 on the air downstream side, and the front foot passage 2 is provided in the middle of the foot passage 27.
7a is open.

The conditioned air from the front seat foot passage 27a is blown out to the feet of the left and right occupants of the front seat through a front seat foot duct (not shown) and a front seat foot outlet. Further, a rear seat foot duct and a rear seat foot air outlet, which are not shown, are connected to the end portion of the foot passage 27, and conditioned air is supplied to the feet of the left and right occupants of the rear seat through the rear seat foot air outlet. It is configured to blow out.

The foot opening 26 is opened and closed by a flat foot door 28. This foot door 28
Is installed on the upstream side of the foot opening 26 and is rotatably supported by a rotary shaft 26c arranged in the horizontal direction.

The defroster door 23, the face door 25, and the foot door 28 are control door means for switching the blowout modes, and are the rotating shafts 23c, 25c, 28c.
One end of is projected to the outside of the air conditioning case 11, is connected to a link mechanism (not shown), and is interlocked by a servo motor 18 which is a driving means.

The air mix door 16, the defroster door 23, the face door 25 and the foot door 28 are
The door shaft is made of resin or metal and is integrally connected to the rotary shafts 16c, 23c, 25c, 28c, and elastic sealing materials such as urethane foam are attached to both front and back surfaces of the door substrate.

Reference numeral 29 is a mounting member for fixing the air conditioning unit 10 to the vehicle, and is integrally formed with the air conditioning case 11 at a portion adjacent to the defroster opening 21.

Next, the operation of this embodiment having the above structure will be described. As is well known, a vehicle air conditioner is an electronic control unit (not shown) to which operation signals from various operation members provided on an air conditioning operation panel (not shown) and sensor signals from various sensors for air conditioning control are input. The control doors 16, 23, 2 are controlled by the output signals of the control device.
The turning positions of 5, 28 are controlled.

The adjustment of the temperature of the air blown into the passenger compartment is as follows.
This is performed by adjusting the air volume ratio of the cool air cooled by the evaporator 12 and flowing directly to the cold air bypass passage 15 side to the warm air heated by the heater core 13 by the air mix door 16.
Then, the cold air and the warm air are mixed in the air mixing unit 20 and then blown out to a predetermined portion in the vehicle interior according to the blowout mode.

FIG. 3 shows the state of the foot differential blowing mode of the blowing mode, in which the face opening 24 is closed by the face door 25 and the foot door 28 and the defroster door 23 are at the positions shown in FIG. Thus, the respective openings 21, 26 are set so as to be blown out, for example, from the defroster outlet at 20% and at the foot outlet at an air volume ratio of 80%.

In the temperature control region, the air mix door 16 opens the cold air bypass passage 15 by an appropriate amount, and the cool air flowing from the evaporator 12 to the cold air bypass passage 15 side and the hot air passing through the heater core 13 are mixed with each other. The conditioned air mixed in the section 20 is mixed with the respective openings 21, 2
Guided to 6. As a result, the conditioned air adjusted to a desired temperature is blown toward the front window glass through the defroster opening 21 and is blown toward the occupant's feet through the foot opening 26.

In this embodiment, since the defroster opening 21 is formed above the evaporator 12, the air path from the cold air bypass passage 15 to the defroster opening 21 has a sufficient length. It is possible to prevent cool diff that blows the cool air that has passed through 15 from the defroster outlet before mixing with the warm air.

FIG. 1 shows the state of the face blowing mode, in which the defroster opening 21 and the foot opening 26 are closed by the foot door 28 and the defroster door 23, and the face door 25 is brought to the position shown in FIG. At some point, for example, 100% is set to be blown out from the face outlet.

In the temperature control area, when the air mix door 16 fully opens the cold air bypass passage 15, the cold air passing through the upper portion of the evaporator 12 passes through the cold air bypass passage 15 and reaches the face opening 24. Since the ventilation path to reach is formed almost straight, the ventilation resistance between them is small, so that the amount of cold air can be increased.

According to the vehicle air conditioner of the first embodiment described above, the defroster opening 21 is formed in the air conditioning case 11 above the evaporator 12, and the defroster opening 21 is formed above the substantial center of the evaporator 12 in the height direction. By forming the cold air bypass passage 15 in the air passage to form the air passage communicating with the defroster opening 21 and the face opening 24, for example, in the face mode in which the conditioned air is blown from the face outlet in the blowout mode, the evaporator is provided. It is possible to reduce the ventilation resistance of the cool air passing through the upper part of 12 through the cold air bypass passage 15 and reaching the face opening 24. Thereby, the amount of cold air can be secured.

By forming the defroster opening 21 above the evaporator 12, the cold air bypass passage 15 is formed.
Even if the above is formed above the air conditioning case 11, the air mixing section 20
Therefore, it is possible to prevent cool diff that blows cold air before mixing from the defroster opening 21.

Further, the servo motor 18 for driving the air mix door 16 is generally fixed on the side wall of the air conditioning case 11 at a position avoiding the heater core 13. Therefore, in the present invention, the rotation shaft 16c of the air mix door 16 is installed away from the heater core 13 so that the mounting range of the servo motor 18 can be expanded.

Further, by constructing the drive shaft of the servomotor 18 and the rotary shaft 16c to be directly driven, the link mechanism is eliminated as compared with the conventional method of driving the rotary shaft 16c via the link mechanism. Therefore, the number of parts can be reduced and the manufacturing cost can be reduced.

Further, since the rotating shaft 23c of the defroster door 23 is installed above the air inflow portion 14, the rotating shaft 23c obstructs the ventilation path leading from the air mixing portion 20 to the defroster opening 21. Since it can be installed without making it necessary, the ventilation resistance of the conditioned air flowing through this ventilation path can be reduced.

(Second Embodiment) In the first embodiment described above, the defroster opening 21 is formed in the upper portion of the air conditioning case 11 on the vehicle front end side, and the defroster opening 21 is formed above the substantial center of the evaporator 12 in the height direction. A cold air bypass passage 15 is formed in the defroster opening 21 and the face opening 2
Although the air-conditioning case 11 that constitutes the air passage communicating with 4 has been described, the air inflow portion 14 formed on the upstream side of the evaporator 12 and the upstream side of the defroster opening portion 21 are communicated with each other to be blown from the blower unit. Part of the air evaporator 1
2 may be bypassed to blow air to the face opening 24.

Specifically, as shown in FIG. 4, a blower bypass passage 30 that connects the upstream side of the defroster opening 21 and the air inlet 14 is formed in the air conditioning case, and the blower bypass passage 30 is opened and closed. The switching door means 31 is arranged. Here, the rotation shaft 23c of the defroster door 23
Is inverted in the vertical direction and installed near the defroster opening 21. The same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

According to the above structure, the face opening 24
The air from the blower unit can be blown to the ventilation path leading to. As a result, for example, when the outside air temperature in spring or autumn is in the face blowout mode in the middle period and the air conditioner is set to the outside air mode and the air conditioner is operated, a part of the outside air is kept at the same temperature and humidity as the face outlet. Can be blown out from. Therefore, the odor of the cold air passing through the evaporator 12 can be reduced.

Further, by disposing the switching door means 31 for opening and closing the blower bypass passage 30, for example, the blower bypass passage 3 is opened only when the face opening 24 is opened.
When 0 is opened and the defroster opening 21 is opened, the blower bypass passage 30 may be closed. This prevents cool diff by preventing the outside air from being blown out from the defroster outlet.

(Other Embodiments) In the second embodiment described above, the defroster door 2 that opens and closes the defroster opening 21.
3 and switching door means 31 for opening and closing the blower bypass passage 30
Are arranged separately, but the blower bypass passage 30 is opened when the face opening 24 is opened by using the rotary door, and the blower bypass passage 30 is closed when the defroster opening 21 is opened. It may be configured.

Specifically, as shown in FIG. 5, a rotary type defroster door 23 is installed above the air inlet 14 and upstream of the defroster opening 21.
The defroster door 23 opens the blower bypass passage 30 when the face opening 24 opens, and when the defroster opening 21 opens, the blower bypass passage 30.
It is formed so as to close. Thereby, the configuration can be simpler than that of the second embodiment.

In the above embodiment, the operation of each control door is driven by an actuator such as a servo motor via a link mechanism. However, the temperature control lever and the blowout mode switching lever provided on the air conditioning operation panel are described. Each of the control doors may be operated via an operation cable or the like by a manual operation force applied to a manual operation member such as.

In the above embodiment, each control door 1
6, 23, 25, and 28 have the same structure in the state of a single body, and each rotation shaft 16c, 23c, 25c, 28c.
It was explained that the structure has a door substrate made of resin or metal that is integrally combined with, and the elastic sealing material such as urethane foam is adhered to both front and back surfaces of the substrate, but not limited to this, the elastic seal For example, a door switching unit having a film-like structure without sticking a material may be used.

Further, although the blower mode switching means is driven by the user using the control lever to manually operate the blowout mode switching means, the air conditioner equipped with an automatic air conditioner for automatically controlling the blowout mode switching means is used. Is also applicable.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing an overall configuration of an air conditioning unit 10 of a vehicle air conditioning device according to a first embodiment of the present invention.

FIG. 2 is a schematic view showing a mounting form of a servo motor 18 mounted on a side wall of the air conditioning case 11 shown in FIG.

FIG. 3 is a schematic diagram showing an operating state (foot defroster blowing mode) in another blowing mode of FIG. 1.

FIG. 4 is a schematic diagram showing an overall configuration of an air conditioning unit 10 of a vehicle air conditioner according to a second embodiment of the present invention.

FIG. 5 is a schematic diagram showing an overall configuration of an air conditioning unit 10 of a vehicle air conditioning device in another embodiment.

[Explanation of symbols]

11 ... Air conditioning case 12 ... Evaporator (cooling heat exchanger) 13 ... Heater core (heating heat exchanger) 14 ... Air inflow part 15 ... Cold air bypass passage 17 ... Warm air passage 16 ... Air mix door 16c ... Rotating shaft 18 ... Servo motor (driving means) 20 ... Air mixing part 21 ... Defroster opening 23 ... Defroster door (defroster switching door means, switching door means) 23c ... Rotating shaft 24 ... Face opening 30 ... Blower bypass passage 31 ... Switching Door means

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yoshinobu Mochizuki             1-1, Showa-cho, Kariya city, Aichi stock market             Inside the company DENSO F-term (reference) 3L011 CP03

Claims (6)

[Claims] 1. An air-conditioning case (11) forming an air passage for guiding air-conditioned air to air outlets opening at various places in a vehicle compartment.
And a cooling heat exchanger (12) installed in the air conditioning case (11) for cooling air, and installed downstream of the air flow of the cooling heat exchanger (12) to heat the air. A heating heat exchanger (13) and a hot air passage (17) formed in the air conditioning case (11) and through which the warm air flows through the heating heat exchanger (13).
A cold air bypass passage (15) formed in the air conditioning case (11) and bypassing the heating heat exchanger (13) to allow cool air to flow; The amount of air passing through the air passage (17) and the cold air bypass passage (1
5) an air mix door (16) for adjusting an air flow rate ratio with an air flow rate, and a hot air flow passage (17) formed in the air conditioning case (11) and the cold air bypass passage (17). 1
Air mixing section (20) for mixing with cold air passing through 5)
A face opening (24) formed on the downstream side of the air mixing section (20) and connected to a face outlet that blows conditioned air toward the head of an occupant in the vehicle compartment; and the air mixing section (20). ), And a defroster opening (21) that is connected to a defroster outlet that blows the conditioned air onto the windshield of the vehicle, and the air conditioning case (11) includes the defroster opening (21). Heat exchanger (1
The defroster opening (21) is formed above the defroster, and the cold air bypass passage (15) is formed above substantially the center in the height direction of the cooling heat exchanger (12). An air conditioner for a vehicle, comprising an air passage communicating with the opening (21) and the face opening (24). 2. The air-conditioning case (11) has a rotation of the air mix door (16) which opens and closes the cold air bypass passage (15) at a distance from an upper end of the heating heat exchanger (13). The vehicle air conditioner according to claim 1, wherein a shaft (16c) is installed, and the drive means (18) is configured to directly drive the rotating shaft (16c). 3. The air conditioning case (11) is provided with an air inflow part (14) for taking in conditioned air from a blower unit upstream of the cooling heat exchanger (12), and the air inflow part (14). ) Above the defroster opening (2
The vehicle air conditioner according to claim 1, characterized in that the rotary shaft (23c) of the defroster switching door means (23) for opening and closing 1) is installed. 4. The air conditioning case (11) includes an air inflow part (14) for taking in conditioned air from a blower unit upstream of the cooling heat exchanger (12) and the air inflow part (14). A blower bypass passage (30) communicating with the defroster opening (21) is formed, and the air taken in from the air inflow portion (14) receives the cooling heat exchanger (1).
The vehicle air conditioner according to claim 1, wherein the air conditioner is configured so as to bypass 2) and blow off to the face opening (24). 5. The vehicle according to claim 4, wherein the blower bypass passage (30) is provided with switching door means (23, 31) for opening and closing the blower bypass passage (30). Air conditioner. 6. The switching door means (23, 31) communicates the air inflow portion (14) with the face opening portion (24) when the face opening portion (24) opens, and The vehicle air conditioner according to claim 5, wherein the air inflow portion (14) and the defroster opening portion (21) are configured to be closed when the defroster opening portion (21) opens. apparatus.