JPH09150620A - Blowing-out opening switching device for vehicle air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce manufacturing cost and to adjust the ratio of conditioned air blown from each blowing-out opening of a casing if necessary by blowing conditioned air from each blowing-out opening of the casing without variations in temperature and thus by eliminating a complex link mechanism for operating a damper. SOLUTION: A mixing ratio of cold air from a first heat exchanger 11 (a heat exchanger for cooling air) which bypasses a second heat exchanger 10 (a heat exchanger for cooling air) to hot air from the second exchanger 10 is adjusted by the opening of an air mix damper 12 to generate conditioned air and an air blowing-out mode selecting damper 1 is rotated to move the openings 2, 3L, 3R of the damper 1, whereby conditioned air is blown out only from the blowing-out openings of a casing 4 matching the openings 2, 3L, 3R among the blowing-out openings 5 to 8 of the easing 4. A passage area to the blowing-out openings 5 to 8 of the casing 4 is changed in response to the rotating angle of the air blowing-out mode selecting damper 1 to adjust the ratio of the conditioned air from the blowing-out openings 5 to 8 of the casing 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blowout port switching device for a vehicle air conditioner.

[0002]

2. Description of the Related Art Conventionally, in an air outlet switching device for a vehicle air conditioner, an FA that blows air toward the upper body of an occupant.
A CE outlet and a DEF outlet that blows air toward the windshield are provided on the upper surface of the casing, and a FOOT outlet that blows air toward the lower half of the occupant is provided on the lower surface of the casing. The outlets are rotated to selectively open and close these outlets. In addition, the air flow rate flowing out from each outlet is also adjusted by adjusting the opening of this flat damper.

Further, as a conventional example other than the above-mentioned air outlet switching device, a centrifugal fan, a cylindrical first heat exchanger, a cylindrical or semi-cylindrical second heat exchanger, and a cylindrical air blowout. It has a mode selection damper and a cylindrical housing that surrounds these devices, and the air sucked in from both axial sides of the cylindrical housing is appropriately heat-exchanged by the first and second heat exchangers to adjust the temperature. After the temperature is obtained, there is also one in which the temperature-controlled air is blown out from a blowout port selected from the blowout ports provided on the cylindrical surface of the cylindrical housing.

[0004]

In the conventional air outlet switching device for a vehicle air conditioner described above, since the dampers are operated to selectively open and close each of the air outlets, a complicated operation of the dampers is required. A link mechanism is required, and it takes a lot of time to design and manufacture the link mechanism, and the number of parts increases, which increases the manufacturing cost.

Further, since the cylindrical space portion for mixing the air discharged from the first and second heat exchangers is narrow, (1) the temperature control air blown into the vehicle compartment from the air outlet has uneven temperature.
(2) In the high level mode, there is a problem in that it is not possible to accurately give a temperature difference that causes head chills to the temperature-controlled air blown from the FACE outlet and the temperature-controlled air blown from the FOOT outlet.

The present invention has been proposed in view of the above problems, and its object is to make it possible to blow out temperature-controlled air from each of the air outlets of the casing without temperature unevenness and to operate a damper in a complicated manner. The point is to provide a blower outlet switching device for a vehicle air conditioner that does not require a link mechanism, can reduce the manufacturing cost, and can adjust the air volume ratio of the temperature-controlled air blown from each blower outlet of the casing as needed. is there.

[0007]

In order to achieve the above object, a blower outlet switching device for a vehicle air conditioner according to the present invention includes a first heat exchanger for cooling air and a first heat exchange for the same. A second heat exchanger arranged downstream of the heat exchanger for heating the air, a cold air from the first heat exchanger bypassing the second heat exchanger and a second heat exchanger from the second heat exchanger. An air mix damper that generates temperature-controlled air by adjusting the distribution ratio with warm air according to the opening, a cylindrical air blowout mode selection damper that is arranged downstream of the air mix damper, and surrounds these devices. A casing having a plurality of air outlets that open toward various parts in the vehicle, and an opening that selectively communicates with each air outlet of the casing by rotation of the air outlet mode selection damper. Blowout mode selection Is provided in a part of the parts and the cylindrical surface (claim 1).

In the air outlet switching device for a vehicle air conditioner according to the first aspect, the air blowing mode selection damper has a function of adjusting the air flow rate flowing out from the respective air outlets of the casing (claim 2). .

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an outlet switching device for a vehicle air conditioner according to the present invention will be described with reference to an embodiment shown in FIGS. FIG. 1 is a vertical sectional side view showing an embodiment of an outlet switching device of the vehicle air conditioner, FIG. 2 is a vertical sectional front view thereof, FIG. 3 is a perspective view of a cylindrical air blowing mode selection damper, and FIG. )-(E) are operation explanatory views of the air outlet switching device.

The air outlet switching device of a vehicle air conditioner is
A first heat exchanger (evaporator) 1 arranged in a vehicle center console (not shown) for cooling air
1, a second heat exchanger (heater core) 10 arranged downstream of the first heat exchanger 11 for heating air, and a second heat exchanger 10.
Of the first heat exchanger 11 bypassing the heat exchanger 10 and the distribution ratio of the warm air from the second heat exchanger 10 are adjusted by the opening to generate temperature-controlled air. 12, a cylindrical air blowing mode selection damper 1 arranged on the downstream side of the air mix damper 12, and a casing 4 surrounding these devices.

The upper surface of the casing 4 is provided with a FACE outlet 5 for blowing temperature-controlled air toward the upper half of the occupant and a DEF outlet 6 for blowing temperature-controlled air toward the windshield (not shown). FO that blows out temperature-controlled air toward the feet of the occupant at the upper portions of both side surfaces of the casing 4.
OT outlets 7 and 8 are provided, and an inlet 9 for introducing air from a blower (not shown) into the casing 4 is provided at the lower part of one side of the casing 4.

The first heat exchanger (evaporator) 11
Is one of the devices constituting the refrigeration cycle, and cools the air passing through during the refrigeration cycle operation by exchanging heat with the refrigerant. The second heat exchanger (heater core) 10 is arranged on the downstream side of the first heat exchanger (evaporator) 11 and heats passing air by heat exchange with engine cooling water (hot water) of the vehicle. . The flow rate of hot water at this time is adjusted by a flow rate control valve (not shown), whereby the amount of heat exchanged is controlled and the amount of air heated is controlled.

The air mix damper 12 is provided in a flow path that bypasses the second heat exchanger (heater core) 10 and cools air from the first heat exchanger 11 that bypasses the second heat exchanger 10. The distribution ratio with the warm air from the second heat exchanger 10 is adjusted by the opening degree to generate the temperature-controlled air. The air blowout mode selection damper 1 has a cylindrical shape, an opening 2 is provided on a cylindrical surface, and openings 3L and 3R are provided on both side surfaces, and the air blowout mode selection damper 1 has the first heat exchanger 10. Is disposed on the downstream side of and is supported so as to rotate around the central axis of the cylinder.

And this air blowout mode selection damper 1
Rotates according to the position of the outlet switching lever (not shown), and the openings 2, 3L, 3R move with it,
The flow paths formed by the outlets 5, 6, 7, 8 and the partition walls 13a, 13b, 13c provided in the casing 4 and the openings 2, 3L, 3R of the air outlet mode selection damper 1 are switched. At that time, the flow passage area to each of the outlets 5, 6, 7, and 8 is changed, and the blown air volume is distributed and adjusted.

In the present embodiment, the first cooling air is used.
Of the heat exchanger (evaporator) 11, the second heat exchanger (heater core) 10 for heating the air arranged downstream of the first heat exchanger 11, and the second heat exchanger 10. An air mix damper 12 that generates a temperature-controlled air by adjusting a distribution ratio of the bypassed cold air from the first heat exchanger 11 and the hot air from the second heat exchanger 10 by an opening degree, and these devices. The casing 4 surrounding the is equivalent to a vehicle air conditioner,
The air outlet mode selection damper 1 and the outlets 5, 6, 7, 8 provided in the casing 4 correspond to the outlet switching device.

Next, the operation of the air outlet switching device of the vehicle air conditioner shown in FIGS. 1 to 4 will be specifically described. (A) In the case of FACE blowout As shown in FIG. 4A, the air blowout mode selection damper 1
The opening 2 of the cylindrical surface of the FACE outlet 5 of the casing 4
Match only to the flow path to. At this time, the openings 3L and 3R on both side surfaces of the damper 1 and the FO of the casing 4 are formed.
The temperature-adjusted air obtained by passing through the first heat exchanger (evaporator) 11 and the second heat exchanger (heater core) 10 without overlapping the OT air outlets 7 and 8 is the FACE air outlet 5 Just blow out. (B) In the case of FACE / FOOT blowout As shown in FIG. 4B, the air blowout mode selection damper 1
Is rotated clockwise from the state of (a). At this time,
The opening 2 on the cylindrical surface of the damper 1 is the FA of the casing 4.
It matches only for the flow path to the CE outlet 5,
The flow path area is reduced compared to the state of (a). Further, the openings 3L and 3R on both sides of the damper 1 and the FO of the casing 4
The OT outlets 7 and 8 are partially overlapped (see the shaded portion) and the flow path is opened, so that the temperature-controlled air blows out from the FACE outlet 5 and the FOOT outlets 7 and 8.

At that time, when the damper 1 is rotated with the clockwise direction being positive from the state of (a), the FA of the casing 4 is changed.
The flow passage area to the CE outlet 5 is reduced, and the F of the casing 4 is reduced.
The flow passage area to the OOT outlets 7 and 8 has been expanded to
The air volume ratio of "E blowout" and "FOOT blowout" is adjusted. At this time, as shown in FIG.
The equipment is arranged such that cool air is blown out from the CE air outlet 5 and warm air is easily blown out from the FOOT air outlets 7 and 8 of the casing 4. (C) In case of FOOT blowout As shown in FIG. 7C, the air blowout mode selection damper 1 is rotated clockwise from the state of FIG. At this time, the opening 2 on the cylindrical surface of the damper 1 is inserted into the FAC of the casing 4.
Both the flow path to the E outlet 5 and the flow path to the DEF outlet 6 do not match, and the openings 3 on both side surfaces of the damper 1
L and 3R and the FOOT outlets 7 and 8 of the casing 4 completely overlap each other (see the shaded portion), and the flow path is fully opened.
The temperature-controlled wind blows out only from the FOOT outlets 7 and 8 of the casing 4. (D) In case of FOOT / DEF blowout As shown in FIG. 4D, the air blowout mode selection damper 1
Is rotated clockwise from the state of (c). At this time,
The opening 2 on the cylindrical surface of the damper 1 is a DE of the casing 4.
It matches only to the F outlet 6. Also the damper 1
3L and 3R on both sides of the casing and the FOOT of the casing 4
Since the air outlets 7 and 8 still partially overlap (see the shaded portion) and the flow path is open, temperature-controlled air blows out from the DEF air outlet 6 and the FOOT air outlets 7 and 8 of the casing 4. When the damper 1 is rotated from the state of (c), the flow passage area of the casing 4 to the DEF outlet 6 is increased, and the flow passage area of the casing 4 to the FOOT outlets 7 and 8 is reduced. The air flow rate ratio of "DEF blowing" and "FOOT blowing" is adjusted. (E) In the case of DEF blowing As shown in FIG. 4 (e), the air blowing mode selection damper 1
Is rotated clockwise from the state of (d). At this time,
The opening 2 on the cylindrical surface of the damper 1 is a DE of the casing 4.
The openings 3L, 3R on both sides of the damper 1 and the FOOT outlets 7, 8 of the casing 4 do not overlap with each other, and the passage is fully closed. Then, the temperature-controlled air blows out only from the DEF air outlet 6 of the casing 4.

[0018]

As described above, the air outlet switching device for a vehicle air conditioner according to the present invention has the first heat exchanger (air cooling heat) bypassing the second heat exchanger (air cooling heat exchanger) as described above. The distribution ratio of the cool air from the exchanger) and the hot air from the second heat exchanger is adjusted by the opening degree of the air mix damper,
While generating temperature-controlled air, the air-blowing mode selection damper is rotated to move the opening of the damper, and the temperature-controlled air is blown out only from the air outlet of the casing that matches the opening. The temperature-controlled air can be blown out from the outlet without temperature unevenness.

Further, since the flow passage area to the air outlet of the casing is changed according to the rotation angle of the air outlet mode selection damper, a complicated link for operating the damper like the air outlet switching device of the conventional vehicle air conditioner. The manufacturing cost can be reduced without the need for a mechanism. Further, since the flow passage area to the air outlet of the casing is changed according to the rotation angle of the air outlet mode selection damper, the air volume ratio of the temperature control air blown out from each air outlet of the casing can be adjusted as necessary.

[Brief description of the drawings]

FIG. 1 is a vertical cross-sectional side view showing an embodiment of an outlet switching device for a vehicle air conditioner according to the present invention.

FIG. 2 is a vertical sectional front view showing an outlet switching device of the vehicle air conditioner.

FIG. 3 is a perspective view showing an air outlet mode selection damper of the outlet switching device of the vehicle air conditioner.

4 (a) to 4 (e) are operation explanatory views of the air outlet switching device of the vehicle air conditioner.

[Explanation of symbols]

 1 Air blowout mode selection damper 2 Cylindrical surface opening of the same damper 1 3L, 3R Opening on both side surfaces of the same damper 4 Casing 5-8 Air outlet of casing 4 10 Second heat exchanger 11 First heat Exchanger 12 Air mix damper

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor, Tatsuhide Kawahara, Aichi Prefecture Nishi-Kasugai-gun, Nishibiwajima-cho, Asahi-cho, 3-chome, Mitsubishi Heavy Industries, Ltd. (Air Conditioner Factory) Asahi-cho 3-chome Mitsubishi Heavy Industries, Ltd. Air Conditioning Factory

Claims (2)

[Claims] 1. A first heat exchanger for cooling air, a second heat exchanger arranged downstream of the first heat exchanger for heating air, and a second heat exchanger. First bypassed
The air mix damper that generates the temperature-controlled air by adjusting the distribution ratio between the cool air from the heat exchanger and the hot air from the second heat exchanger according to the opening, and the air mix damper is provided on the downstream side of the air mix damper. It has a cylindrical air-blowing mode selection damper and a casing that surrounds these devices.The casing is provided with a plurality of air outlets that open toward various parts inside the vehicle, and the air-blowing mode selection damper rotates. An air outlet switching device for a vehicle air conditioner, characterized in that openings for selectively communicating with the air outlets of the casing are provided on a part of both end faces of the air blowing mode selection damper and a part of a cylindrical surface. . 2. The air outlet switching device for a vehicle air conditioner according to claim 1, wherein the air blowing mode selection damper has a function of adjusting an air flow rate flowing out from each of the air outlets of the casing.