JP2000043535A - Air-conditioner for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air-conditioner for an automobile to increase a wind force and reduce the generation of noise and improve air mixture property. SOLUTION: A heater core 13 is disposed downstream of draft from an evaporator 12 and a hot air passage 14 through which draft after a flow of it through the heater core 13 passes is formed in a case. Cold air passages 15 and 16 running around the heater core 13 are formed on both sides in a vertical direction of the hot air passage 14. First and second slide doors 21 and 22 vertically slidably moved to open and close the two cold air passages 15 and 16 and the hot air passage 14 are disposed between the evaporator 12 and the heater core 13. The two slide doors 21 and 22 are formed in a curved state and the protrusion side are disposed downward of draft. In a state to close the hot air passage 14, end parts 21a and 22a making contact with each other are disposed in a state to protrude toward a position situated upper stream of draft from the other end parts 21b and 22b.

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.

[0002]

2. Description of the Related Art An air conditioner for an automobile is provided with a heater core for ventilation heating downstream of an evaporator for cooling ventilation in a case, as described in, for example, Japanese Patent Application Laid-Open No. 9-175147. A three-layer flow type in which a warm air passage passing through the heater core is formed in the case, and cool air passages bypassing the heater core are formed on both upper and lower sides of the warm air passage. In some cases, two slide doors are disposed between the evaporator and the heater core, and the two slide doors open and close the hot air passage and both the cool air passages to adjust the temperature of the ventilation.

[0003]

FIGS. 4 to 6 are explanatory diagrams showing the problems of the conventional product. FIG. 4 shows a state at the time of temperature adjustment, and FIG. 5 shows a state at the time of full cooling. FIG. 6 shows a state at the time of full hot. 4 to FIG. 6, the symbol k indicates a blower connection port, and the symbol m
Indicates a vent outlet, symbol n indicates a foot outlet, symbol p indicates a sliding vent door that opens and closes the vent outlet, and symbol q indicates a rotary foot door that opens and closes the foot outlet. Is shown.

As shown in FIGS. 4 to 6, in a three-layer flow type air conditioner a for a vehicle, a first sliding door d1 for opening and closing upper portions of an upper cold air passage b1 and a hot air passage c.
And a second sliding door d2 that opens and closes the lower portion of the cold air passage b2 and the remaining portion of the hot air passage c. The distance from the evaporator f is set to the maximum for reducing the resistance.

The first and second sliding doors d
The size of d1 and d2 is limited to a size that does not block the cold air passages b1 and b2 while closing the entire surface of the heater core e at the time of full cooling.
The size is limited to a size that is shut off by the first sliding door d1 at the time of full hot, and the vertical sectional area of the lower cold air passage b2 is limited to a size that is shut off by the second sliding door d2 at the time of full hot.

For this reason, in the air conditioner a for automobiles,
The case g above the first sliding door d1 is provided with a sealing rib h for sealing the first sliding door d1 at the time of full hot, and this sealing rib h causes an increase in air flow resistance at the time of temperature adjustment and at the time of full cooling. In addition to inhibiting high wind power during adjustment and full cooling, high output of the blower for blower is caused, and the noise of the blower for blower is increased due to the higher output.

[0007] In addition, as shown in FIG.
At the time of temperature adjustment in which the two sliding doors d1 and d2 make the hot air passage c and the cold air passages b1 and b2 half-open,
Since the distance between the sliding doors d1 and d2 and the heater core e is short, the passage area in the heater core e through which the air passes is limited, and as a result, the warm air that has passed through the heater core e and the cool air passage b1 that has passed through the upper part. The distance L from the cold wind is far,
The air mix property, which is the mixing action of the warm air and the cool air in the air mix chamber i, is impaired.

[0008] Therefore, an object of the present invention is to provide an air conditioner for a vehicle which can improve the air mix property, increase the wind power and reduce the noise as compared with conventional products.

[0009]

As means for solving the above-mentioned problems, according to the first aspect of the present invention, a heater core for ventilation is disposed downstream of the evaporator for cooling the ventilation in the case. A hot air passage that passes through the heater core is formed in the case, and a cool air passage that bypasses the heater core is formed on both sides of the hot air passage with the hot air passage interposed therebetween, and one between the evaporator and the heater core is provided. A first sliding door that slides between a hot air position where the cold air passage is closed and a part of the hot air passage is opened, and a cold air position where one cold air passage is opened and a part of the hot air passage is closed. And a cold air position where the other cool air passage is closed to open the remaining portion of the hot air passage and a cold air position where the other cold air passage is opened and the remaining portion is closed. Tesla The air-conditioning apparatus is disposed a second sliding door to de movement, the first and second
The two slide doors are curved and are disposed to pass through the convex side to the downstream side of the air flow, and are located at the cold air position and abut against each other when the hot air passage is closed. Are disposed so as to protrude from the other end to the ventilation upstream side.

According to the first aspect of the present invention, the first and second slide doors are formed to be curved, are arranged on the convex side toward the downstream side of the air flow, and are located at the cool air position. In the state where the warm air passage is closed, the end portions that are in contact with each other are disposed so as to protrude from the other end to the upstream side of the ventilation, so that the convex side is curved toward the downstream side of the ventilation. 4 and 6, and the second sliding doors are arranged obliquely in a "U" shape with respect to the ventilation inflow surface of the heater core, and are arranged in parallel with the ventilation inflow surface of the heater core. The length in the sliding direction is longer than that of the conventional both sliding doors.

Therefore, according to the first aspect of the present invention, FIGS.
Compared with the conventional product shown in the drawing, the length of the protrusion of the seal rib provided in the cold air passage of the case for sealing the slide door at the cold air position to the cold air passage can be shortened. As a result, the effective air cross-sectional area of the cold air passage can be reduced. By enlarging, the ventilation resistance of the cool air passage can be reduced.

According to the first aspect of the present invention, both the first and second slide doors which are curved toward the airflow downstream side on the convex surface side are arranged obliquely in a "-" shape with respect to the airflow inflow surface of the heater core. Therefore, when the temperature of the two slide doors is adjusted so that the hot air passage and the cold air passage are in a half-open state, part of the airflow flowing through the warm air passage is partially curved on the downstream side of the airflow of the two slide doors when passing through the heater core. And flows into the peripheral area of the heater core which is shielded by both sliding doors.

Further, according to the first aspect of the present invention, the first and second slide doors which are curved toward the ventilation downstream side on the convex side are arranged obliquely in a "U" shape with respect to the ventilation inflow surface of the heater core. Therefore, when both slide doors close the warm air passage in full cool, the air colliding with the curved upstream surface of both slide doors flows along the curved surface, and both slide doors slide against the ventilation inflow surface of the heater core. As compared with the conventional products shown in FIGS. 4 to 6 in which the doors are arranged in parallel, the door smoothly flows into the cool air passage.

According to a second aspect of the present invention, there is provided the air conditioner for an automobile according to the first aspect, wherein the first and second slide doors are curved in an arc shape. .

Therefore, according to the second aspect of the present invention, by moving both slide doors along the curvature of the arc, both slide doors can be slid over the hot air position and the cold air position.

[0016]

According to the first aspect of the present invention, the projecting length of the sealing rib, which is provided in the cold air passage of the case and seals the slide door at the cold air position, in the cold air passage is different from that of the conventional product shown in FIGS. As a result, the effective cross-sectional area of the cool air passage can be increased, and the ventilation resistance of the cool air passage can be reduced. Therefore, compared with the conventional products shown in FIGS. High wind power can be achieved at the time of temperature adjustment and full cooling.

According to the first aspect of the present invention, FIGS.
Compared with the conventional product shown in the figure, it is possible to increase the wind power at the time of temperature adjustment to open the cold air passage and at the time of full cooling,
It is also possible to reduce power consumption by suppressing the output of the blower, and reduce noise of the blower by lowering the output of the blower.

Further, according to the first aspect of the present invention, the first and the second
At the time of temperature adjustment in which both the sliding doors make the hot air passage and the cold air passage half-open, a part of the ventilation flowing through the hot air passage is
Since the air flows along the curved surface on the downstream side of the ventilation of the sliding doors and flows into the area around the heater core which is shielded by the sliding doors, compared with the conventional products shown in FIGS. The separation distance from the warm air flowing through the wind passage can be shortened as a whole, and as a result, the air-mixing property, which is the mixing action of the warm air and the cool air, can be improved.

Further, according to the first aspect of the present invention, when the slide doors are in a full cool state in which the hot air passage is closed, the airflow that collides with the curved upstream surface of the slide doors flows along the curved surfaces, and the heater core has Compared to the conventional products shown in FIGS. 4 to 6 in which both sliding doors are arranged in parallel to the ventilation inflow surface, they flow into the cool air passage more smoothly, so that the ventilation resistance during full cooling is reduced and the wind power is increased. In addition, it is also possible to save power by suppressing the output of the blower for blower due to the increase of wind power, and to reduce noise of the blower for blower by lowering output of the blower for blower.

According to the second aspect of the present invention, by moving both the sliding doors along the curvature of the arc, the sliding doors can be slid over the hot air position and the cold air position. The movement can be easily performed by both sliding doors.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory view showing an example of an embodiment in which both the first and second aspects of the present invention are implemented. FIG. 2 is an explanatory diagram showing a state of the device shown in FIG. 1 at the time of full cooling, and FIG. 3 is an explanatory diagram showing a condition of the device shown in FIG. 1 at the time of full hot.

As shown in FIGS. 1 to 3, the air conditioner 1 for an automobile is provided with an evaporator 12 for cooling ventilation flowing into a case 11 from a blower connection port 10, and a ventilation downstream of the evaporator 12. And a heater core 13 for ventilation heating provided therein. A hot air passage 14 passing through the heater core 13 is formed in the case 11, and cool air passages 15 and 16 bypassing the heater core 13 are connected to the hot air passage 14. The hot air passage 14 is formed on both upper and lower sides of the hot air passage 14 therebetween.

Then, the evaporator 12 and the heater core 1
3, the upper portion of the warm air passage 14 is opened by closing the upper cool air passage 15 and the upper portion of the warm air passage 14 is opened by opening the upper portion of the warm air passage 14. First sliding door 21 that slides over the cold air position
And a hot air position where the lower cool air passage 16 is closed to open the lower portion of the hot air passage 14, and the lower cool air passage 16 is opened to close the lower portion of the hot air passage 14. A second sliding door 22 that slides between the cold air positions is provided.

First and second sliding doors 21 and 22
The end portions 21 are formed in a curved shape in an arc shape, are disposed toward the downstream side of the air flow on the convex side, and are in contact with each other when the hot air passage 14 is closed at the cold air position.
a, 22a are arranged so as to protrude from the other ends 21b, 22b to the upstream side of the ventilation.

The size of the first sliding door 21 is as follows.
In the cool air position, the size is such that the upper part of the hot air passage 14 is closed and the upper cool air passage 15 is not blocked,
At the hot air position, the size is selected such that the upper cold air passage 15 is closed and the upper part of the hot air passage 14 is not blocked.

The size of the second sliding door 22 is as follows.
In the cool air position, the size is such that the warm air passage 14 is closed in cooperation with the first slide door 21 and the lower cool air passage 16 is not blocked, and in the warm air position, the lower cool air passage 16 is closed. The size is selected so as not to block the lower part of the hot air passage 14.

The first slide door 21 is provided with a rack at both ends in the width direction along a curved surface on the upstream side of the ventilation.
The pinion 23 meshing with the rack slides between the hot air position and the cold air position in an arc having the same curvature as the curvature of the first slide door 21.

The second slide door 22 is provided with a rack at both ends in the width direction along a curved surface on the upstream side of the ventilation.
The pinion 24 meshing with the rack slides between the hot air position and the cold air position in an arc having the same curvature as the curvature of the second slide door 22.

The racks 23 and 24 are driven synchronously with each other. When the rack 23 slides the first slide door 21 from the hot air position to the cold air position, the racks 24 are moved.
When the rack 23 slides the second slide door 22 from the hot air position to the cold air position and the rack 23 slides the first slide door 21 from the cold air position to the hot air position, the rack 24 moves the second slide door 22 The air is slid from the cold air position to the hot air position.

An air mixing chamber 31 is provided downstream of the heater core 13 for adjusting the temperature by mixing warm air passing through the heater core 13 and cool air bypassing the heater core 13. A defroster outlet, which is opened and closed by a rotary defroster door, is provided on a side wall of the case (not shown) beside the air mix chamber 31.

A vent outlet 33 which is opened and closed by a slide type vent door 32 is provided on the rear wall of the case behind the air mixing chamber 31. The vent door 32
On both sides in the width direction, a rack is provided along the surface on the upstream side of the ventilation, and a pinion 34 meshing with the rack extends between a closed position for closing the vent outlet 33 and an open position for opening the vent outlet 33. It is designed to slide.

A foot outlet 36 which is opened and closed by a rotary foot door 35 is provided on the case bottom wall on the downstream side of the heater core 13 from the heater core 13, and a portion of the case 11 located above the first slide door 21 is provided. A seal rib 37 is provided to abut on the upper end of the first slide door 21 at the cool air position of the first slide door 21 to seal the first slide door 21.

In the automotive air conditioner 1 described above, as shown in FIG. 2, the first and second arc-shaped first and second sliding doors 21 and 22 each having a convex surface directed toward the downstream of the ventilation are provided with a hot air passage. At the time of full cooling when the heater core 13 is fully closed,
Are arranged obliquely in a “く” shape with respect to the ventilation inflow surface. On the other hand, in the conventional product shown in FIGS. 4 to 6, both the first and second slide doors d1 and d2 are arranged in parallel with the ventilation inflow surface of the heater core e.

Therefore, in the air conditioner 1 for an automobile, both the sliding doors 21 and 21 are compared with the conventional product shown in FIGS.
The length of the sealing rib 37 in the upper cold air passage 15 becomes shorter, the effective cold air passage 15 has a larger effective cross-sectional area, and the upper cold air passage 15 has a larger length. 15 ventilation resistance has become smaller,
Higher wind power can be achieved at the time of temperature adjustment for opening the upper cold air passage 15 and at the time of full cooling.

In the air conditioner 1 for a vehicle, compared with the conventional product shown in FIGS. 4 to 6, it is possible to increase the wind force at the time of temperature adjustment for opening the upper cold air passage 15 and at the time of full cooling. Therefore, power saving for suppressing the output of the blower for blower and noise reduction of the blower for blower by lowering the output of the blower for blower can be achieved.

By the way, in the vehicle air conditioner 1,
As shown in FIG. 1, the first and second sliding doors 2
At the time of temperature adjustment in which the hot air passages 14 and the cold air passages 15 and 16 are in a half-open state, a part of the air flowing through the hot air passages 14 is formed on the arcuate surface of the slide doors 21 and 22 on the downstream side of the air flow. And flows into the peripheral area of the heater core 13 which is shielded by the slide doors 21 and 22.

Therefore, in the air conditioner 1 for a vehicle,
Compared with the conventional product shown in FIGS. 4 to 6, the distance between the cold air flowing through the upper and lower cold air passages 15 and 16 and the warm air flowing through the hot air passage 14 can be shortened as a whole. In addition, it is possible to improve the air mixability, which is a mixing action of the warm air and the cool air.

In the air conditioner 1 for an automobile, FIG.
As shown in FIG.
At the time of full cool to close the door 4, both sliding doors 21,
The airflow colliding with the airflow path 22 flows along an arcuate surface on the upstream side of the airflow of both the slide doors 21 and 22 which are arranged obliquely in a “C” shape with respect to the airflow inflow surface of the heater core 13, and the airflow through the heater core e. Both sliding doors d1, d2 with respect to the inflow surface
5 smoothly flow into the upper and lower cold air passages 15 and 16 as compared with the conventional product shown in FIG.

Therefore, in the air conditioner 1 for an automobile,
Compared with the conventional products shown in FIGS. 4 to 6, the ventilation resistance when the ventilation flows into both the cool air passages 15 and 16 at the time of full cooling is reduced, and as a result, high wind power can be achieved at the time of full cooling. In addition, power saving can be achieved by suppressing the output of the blower, and noise of the blower can be reduced by lowering the output of the blower.

Further, in the air conditioner 1 for an automobile, the two slide doors 21 and 22 are moved along the curvature of the arc so that the two slide doors 21 and 22 slide between the hot air position and the cold air position. Since both sliding doors 21 and 22 can be moved along a parabola other than an arc, they can be moved.
It is also possible to make the slide movements of the slides 1 and 22 easy.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a cross section of an example of an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a state of a state shown in FIG. 1 in a full cool state.

FIG. 3 is an explanatory diagram showing a state at the time of full hot of the one shown in FIG. 1;

FIG. 4 is an explanatory view showing a cross section of an example of a conventional product.

FIG. 5 is an explanatory diagram showing a state of a state shown in FIG. 4 in a full cool state.

FIG. 6 is an explanatory diagram showing a state at the time of full hot of the one shown in FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Automobile air conditioner 11 Case 12 Evaporator 13 Heater core 14 Hot air passage 15, 16 Cold air passage 21 First slide door 21a, 21b End of first slide door 22 Second slide door 22a, 22b End of second slide door Department

Claims (2)

[Claims] 1. A heater core (13) for ventilation heating is disposed downstream of an evaporator (12) for cooling ventilation in a case (11), and a hot air passage passing through the heater core (13). 14) is formed in the case (11), and the cool air passage (1) bypassing the heater core (13) is formed.
5, 16) are formed on both sides of the hot air passage (14) with the hot air passage (14) interposed therebetween, and one cold air passage (15) is provided between the evaporator (12) and the heater core (13).
And a cold air position where one of the cold air passages (15) is opened to close a part of the hot air passage (14). A first sliding door (21) that moves is provided, and the other cold air passage (16) is closed to open the remaining portion of the hot air passage (14). 16) A vehicle air conditioner provided with a second sliding door (22) that slides over a cold air position that opens the remaining portion and opens the remaining portion, wherein both the first and second sliding doors are provided. (21,22)
Ends (2) that are curved and are disposed to face the ventilation side toward the downstream side of the air flow and are in contact with each other when the hot air passage (14) is closed at the cold air position.
1a, 22a) is disposed so as to protrude from the other end (21b, 22b) to the ventilation upstream side. 2. The air conditioner for a vehicle according to claim 1, wherein said first and second slide doors (21, 22) are curved in an arc shape. Harmony equipment.