JPH11321283A - Air conditioner for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain the blowoff temperature of a side face blowoff port to appropriate temperature (a normal state). SOLUTION: An F/D(face/defroster) switching door 8 for switching a face blowoff port and a defroster blowoff port has vent holes 13 opened in rectangular shape, at both angular parts, and a weir member 14 is provided around each vent hole 13, protruding in cylindrical shape. In this F/D switching door 8, the vent hole 13 is communicated with the FACE blowoff port even when a blowoff mode of closing the face blowoff port is set, so that air-conditioning air can be partially fed to a side FACE blowoff port from the vent hole 13. The weir member 14 restrains hot air flowing in along the wall surface of a case, from flowing out as it is from the vent hole 13, and has specified height (h) (preferably 14 mm or higher from the surface of a foam plate 8c) required to dam up the hot air.

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 outlet switching door for switching between a face air outlet and a defroster air outlet.

[0002]

2. Description of the Related Art Conventionally, there is an air outlet switching door for switching between a FACE air outlet and a DEF air outlet. As shown in FIG. 4, the outlet switching door is provided with a notch 110 at a corner of the outlet switching door 100, for example.
When the air outlet switching door 100 closes the FACE air outlet (for example, FOOT mode, DEF mode, FOOT / D
Even in the EF mode), a part of the air conditioning
It can be distributed to the side FACE outlet.

[0003]

However, in the prior art,
Since a part of the outlet switching door 100 is opened by providing the notch 110, after being heated by the heater core,
The warm air mainly flowing along the wall of the case passes through the notch 110 of the outlet switching door 100 as it is and is supplied to the side FACE outlet. In this case, the warm air flowing along the wall surface of the case is not sufficiently mixed with the air (cool air) bypassing the heater core after being heated by the heater core. The temperature is higher than the regulated air conditioning wind. As a result,
Since the outlet temperature of the side FACE outlet is higher than the outlet temperature of the DEF outlet, there is a problem that the occupant feels uncomfortable (feels hot). The present invention
An object of the present invention is to provide an air conditioner for a vehicle which can maintain an appropriate (normal) outlet temperature of a side FACE outlet.

[0004]

According to a first aspect of the present invention, an air outlet switching door has a ventilation opening for distributing a portion of the blown air to the side face air outlet when the face air outlet is closed. In addition, a weir member is provided around the ventilation opening. With this weir member, it is possible to suppress the warm air flowing along the wall surface of the case from flowing through the ventilation port to the side face outlet. This can prevent the outlet temperature of the side face outlet from becoming higher than the outlet temperature of the defroster outlet.

(Means of Claim 2) The weir member is provided in a wall shape around the ventilation opening to the air upstream side of the outlet switching door. In this case, the warm air flowing along the wall surface of the case can be easily blocked by the wall-shaped dam member.
In addition, the wall-shaped weir member may be provided in a cylindrical shape around the entire periphery of the ventilation port, or may be provided only in a portion where warm air flows.

[0006]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view of the air conditioning unit.
The vehicle air conditioner of this embodiment includes an air conditioning unit 1 connected to a blower (not shown). The air conditioning unit 1 includes a case 2, a cooling heat exchanger 3, a heating heat exchanger 4, an A / M door 5, and air outlet switching doors 6, 7, 8 and the like housed in the case 2. Is done. The case 2 is, for example, a resin molded product of polypropylene or the like, and forms a blow passage for sending air blown from a blower into a vehicle interior.
This case 2 includes a well-known FACE outlet 9 and a side F
An ACE outlet 10, a DEF outlet 11, and a FOOT outlet 12 are provided. As shown in FIG. 2, the side FACE outlets 10 are provided at one location on each of the left and right sides of the FACE outlet 9.

The cooling heat exchanger 3 is, for example, a refrigerant evaporator of a refrigeration cycle, and air passing through the cooling heat exchanger 3 by exchange of heat with low-temperature and low-pressure refrigerant flowing inside (air blown from the blower). ) Can be cooled. The heating heat exchanger 4 can heat air passing through the heating heat exchanger 4 (air cooled by the cooling heat exchanger 3) using engine cooling water (hot water) as a heat source. A / M
The door 5 is arranged adjacent to the air upstream side of the heating heat exchanger 4, and determines the difference between the amount of air passing through the heating heat exchanger 4 and the amount of air bypassing the heating heat exchanger 4 depending on the degree of opening of the door. The proportion can be adjusted. The outlet switching door switches between the outlets 9 to 12 in accordance with the set outlet mode. The FOOT door 6 opens and closes the FOOT outlet 12, the DEF door 7 opens and closes the DEF outlet 11, and the FAC.
An F / D switching door 8 for switching between the E outlet 9 and the DEF outlet 11 is provided.

Next, the F / D switching door 8 which is a feature of the present invention will be described. As shown in FIG. 3, the F / D switching door 8 includes a shaft 8a for opening and closing,
And a foamed plate material 8c (for example, urethane) disposed on both sides of the central base material 8b. Also, at both corners of the F / D switching door 8,
Each of the ventilation holes 13 has a rectangular opening, and a weir member 14 (described below) is provided around the ventilation hole 13. The F / D switching door 8 is connected to the FACE outlet 9
Even when the outlet mode is set as shown in FIG. 2, as shown in FIG.
It can be supplied to the ACE outlet 10. In addition, F /
The outlet mode in which the D switching door 8 closes the FACE outlet 9 includes, for example, a FOOT mode, a DEF mode, and a FOOT mode.
/ DEF mode.

As shown in FIG. 3, the weir member 14 is provided in a cylindrical shape so as to protrude around the ventilation opening 13 toward the air upstream side of the F / D switching door 8 (upward in FIG. 3). This weir member 14 is
It may be provided integrally with the center base material 8b of the D switching door 8,
The cylindrical body that opens in a rectangular shape may be formed separately from the central base material 8b, and the two may be joined. The weir member 14 is provided with the F / D switching door 8.
Is in the outlet mode in which the FACE outlet 9 is closed, the warm air flowing along the wall of the case 2
3 and a predetermined height h (for example, foam plate material 8c) required to dampen hot air.
(Preferably 14 mm or more from the surface).

Next, the operation of this embodiment will be described. The air sent from the blower to the air conditioning unit 1 is cooled when passing through the cooling heat exchanger 3, and passes through the heating heat exchanger 4 and the heating air according to the opening of the A / M door 5. Heat exchanger 4
After being separated into air that bypasses the heat exchanger 4
The hot air heated by passing through and the cold air bypassing the heating heat exchanger 4 are joined to adjust the temperature, and are blown into the vehicle cabin from a predetermined outlet opening according to the outlet mode. When the outlet mode in which the F / D switching door 8 closes the FACE outlet 9 is set, a part of the blown air passes through the ventilation opening 13 of the F / D switching door 8 and the side FACE outlet 10.
Distributed to At this time, a part of the air (warm air) that has passed through the heating heat exchanger 4 flows along the wall surface of the case 2, so that the air (warm air) sufficiently mixes with the cool air that has bypassed the heating heat exchanger 4. The vehicle reaches the F / D switching door 8 without being touched. Here, weir member 1 is inserted into ventilation opening 13 of F / D switching door 8.
If the case 4 is not provided, the warm air flowing along the wall surface of the case 2 easily flows out to the side FACE outlet 10 through the ventilation port 13 as it is. On the other hand, ventilation hole 13
When the weir member 14 is provided around the surroundings, the warm air flowing along the wall surface of the case 2 is blocked by the weir member 14 and can be prevented from flowing out directly from the ventilation port 13.

(Effect of this embodiment) In this embodiment, the F / D
When the switching door 8 closes the FACE outlet 9 in the outlet mode, the hot air flowing along the wall of the case 2 is blocked by the weir member 14 so that the hot air is switched as it is to the F / D. It is possible to prevent the air from flowing out of the vent 13 of the door 8. Thereby, the air in which the cold air and the hot air are sufficiently mixed can be supplied from the ventilation port 13 of the F / D switching door 8 to the side FACE outlet 10, and the outlet temperature of the side FACE outlet 10 is reduced to the DEF outlet 11. Can be prevented from becoming higher than the air outlet temperature, and discomfort to the occupant due to the burning of the face can be reduced.

(Modification) In the above embodiment, the weir member 14 is provided in a cylindrical shape around the ventilation opening 13, but is partially provided only in the direction in which warm air flows along the wall surface of the case 2. Is also good.

[Brief description of the drawings]

FIG. 1 is a sectional view of an air conditioning unit.

FIG. 2 is a plan view of a FACE outlet and a side FACE outlet.

FIG. 3 is a partial perspective view of an outlet switching door showing a weir member.

FIG. 4 is a partial perspective view of the outlet switching door showing a cutout;

[Explanation of symbols]

 2 Case 8 F / D switching door (air outlet switching door) 9 FACE air outlet (face air outlet) 10 Side FACE air outlet (side face air outlet) 13 ventilation hole 14 weir member

Claims (2)

[Claims] 1. A case having a ventilation passage through which ventilation air flows, and having a face outlet and a side face outlet at a downstream end of the ventilation passage, and a blower disposed in the case for opening and closing the face outlet. An outlet switching door, wherein the outlet switching door has a ventilation port for distributing a part of the blown air to the side face ventilation port when the face ventilation port is closed, and An air conditioner for a vehicle, wherein a dam member is provided around the wall to suppress hot air flowing along the wall surface of the case from flowing out of the ventilation port. 2. The air conditioner for a vehicle according to claim 1, wherein the weir member is provided in a wall shape around the ventilation port and upstream of the air outlet switching door in the air upstream direction.