JPH10278545A - Air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a blow hole switching device of an air conditioner, which can control the lowering of the self-exciting vibration preventive effect of a second blow hole mode switching door. SOLUTION: A nearly square shaped packing 35 is adhered to the side face of a second blow hole mode switching door 2, which rotates around the center of a rotary shaft 33 through a jointing means such as adhesive agent or the equivalent. Parallel ribs 36 and 37, on which the packing 35 abuts at a plurality of places when the second blow hole mode switching door 2 turns from the FACE position to the DEF position is formed separated from each other a little on the internal wall face of a unit case, preventing the formation of an arc around the center of the rotary shaft 33. Through such constitution, the restoring force of the packing 35 is kept long by shifting the portions where the packing 35 provided in the side face of the second spit hole mode switching door 2 is pressed against the ribs 36 and 37 formed on the internal wall face of the unit case 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner in which the opening of a ventilation passage is changed by a plate-like door.

[0002]

2. Description of the Related Art Conventionally, an air outlet switching device incorporated in a vehicle air conditioner selectively opens and closes a first air outlet such as a defroster air outlet and a second air outlet such as a face air outlet. The plate-like switching doors are housed in an air-conditioning case. Such an outlet switching device switches the plate shape from a state in which the first outlet is fully closed and a state in which the second outlet is fully open to a state in which the first outlet is fully opened and the second outlet is fully closed. If you stop the movement of the plate-like switching door while moving the door,
Air pressure (wind pressure) going to the second outlet through the air conditioning case
As a result, the plate-like switching door is pushed to the side where the first outlet is closed, or is pushed to the side where the second outlet is closed by air pressure passing through the air conditioning case toward the first outlet. When such a swinging motion occurs, self-excited vibration of the plate-like switching door occurs.

Therefore, there is an air conditioner as follows for the purpose of preventing self-excited vibration of the plate-like switching door as described above. As shown in FIGS. 6A and 6B, the rotating shaft 1 rotatably supported by the air-conditioning case 101.
02, when the plate-like switching door 103 pivotally attached to the door 102 is stopped in the middle of the rotation trajectory, the plate-like switching door 103
Packing 104 added to the side of the air conditioning case 101
The above-mentioned object is achieved by forcibly fixing the plate-like switching door 103 by the restoring force (repulsive force) of the packing 104 at this time by being compressed by the convex rib 105 provided on the inner wall surface of It is an air-conditioning device. The rib 1
05 is formed in an arc shape having a radius centered on the rotation shaft 102 so as to follow the rotation locus of the packing 104.

[0004]

However, in the conventional air conditioner, when the self-excited vibration range of the plate-like switching door 103 is wide as shown in FIGS.
Since the rib 105 is provided along the rotation locus, the same portion of the packing 104 is always compressed by the rib 105. As a result, when used for a long period of time, the restoring force of the packing 104 decreases, and the force for holding the plate-like switching door 103 decreases.
05, the self-excited vibration preventing effect of the plate-like switching door 103 is reduced.

[0005]

An object of the present invention is to pay attention to the fact that the same portion of the packing is always pressed against the ridge of the air conditioning case to reduce the self-excited vibration effect. By providing a ridge so that it contacts a different part of the sliding member according to the rotation angle of the door, the part where the sliding member is pressed against the ridge is shifted to maintain the restoring force of the sliding member The purpose of the present invention is to suppress a decrease in self-excited vibration prevention effect.

[0006]

According to the first aspect of the present invention, a plate-shaped door is provided within a predetermined rotation range of a rotation trajectory around which a plate-shaped door rotates. A ridge provided on a portion facing the sliding member of the air-conditioning case so as to contact a different portion of the sliding member provided on the side surface in the thrust direction of the plate-shaped door according to the rotation angle of the door. , The restoring force of the same portion of the sliding member does not weaken. Thereby, even if the sliding member slides on the ridge every time the plate-shaped door is rotated, a decrease in the restoring force of the sliding member is suppressed. However, the force that suppresses the movement of the plate-like door is not weakened. For this reason, it is possible to suppress a decrease in the self-excited vibration preventing effect due to the sliding member and the protrusion.

According to the second aspect of the present invention, when the packing made of urethane foam resin is used as the sliding member, the sliding member can be used when the plate-shaped door rotates about the rotation axis. Even when sliding with the ridge, the operation load of the plate-like door does not increase so much. According to the third aspect of the present invention, since the ridge is integrally formed on the wall surface of the air conditioning case, it is not necessary to assemble the ridge provided separately from the air conditioning case on the wall surface of the air conditioning case. Price can be reduced.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION

1 to 5 show an embodiment of the present invention. FIG. 1 is a diagram showing a main configuration of an air conditioning unit, and FIG. 2 is a diagram showing an entire configuration of the air conditioning unit. is there.

In the air conditioner for a vehicle according to the present embodiment, each air conditioning means in the air conditioning unit 10 for air conditioning the interior of the vehicle compartment of the vehicle equipped with the engine is operated by operating various levers provided on an operation panel P on the front of the vehicle interior. It is a manual air conditioner or an automatic air conditioner configured to be operated by a position or an air conditioning control device (hereinafter, referred to as ECU) not shown.

The air conditioning unit 10 includes an inside / outside air switching device (not shown) for switching between inside and outside air modes in the direction of air flow, an air cooling device (not shown) for cooling air, and an air outlet (to be described later). A switching device is provided. The inside / outside air switching device includes an inside / outside air switching box, an inlet mode switching door rotatably mounted in the inside / outside air switching box, and the like. The air cooling device includes a unit case, an evaporator (cooling heat exchanger) for cooling the air passing through the unit case, and the like.

Among these, the air outlet switching device located downstream of the inside / outside air switching device and the air cooling device (cooling unit) includes a unit case 11, a centrifugal blower 1
2, a heater unit including a heater core 13, an air mix door 14, and two first and second outlet mode switching doors 1, 2, and the like.
The air outlet mode is switched by selectively opening and closing the air outlet 15, the face (FACE) air outlet 16, and the foot (FOOT) air outlet 17. Unit case 11
Is a component corresponding to the air-conditioning case of the present invention, which is disposed on the front side of the cabin of the vehicle and forms an air passage 18 therein. The downstream end of the air passage 18 branches into a first ventilation passage 21, a second ventilation passage 22, and a third ventilation passage 23.

Here, a defroster duct (not shown) is connected to the first ventilation path 21, and the conditioned air (mainly hot air) introduced into the defroster duct is a downstream end of the defroster duct. The air is blown out from the DEF outlet 15 toward the inner surface of the windshield of the vehicle. In addition, a face duct (not shown) is connected to the second ventilation path 22, and the conditioned air (mainly, cool air) introduced into the face duct flows from the FACE outlet 16, which is the downstream end of the face duct. Is blown out toward the occupant's head and chest. Further, a foot duct (not shown) is connected to the third ventilation path 23, and the conditioned air (mainly hot air) introduced into the foot duct is supplied to the FOOT outlet 17 at the downstream end of the foot duct. Is blown out toward the feet of the occupants of the vehicle.

The centrifugal blower 12 includes a unit case 11
, A centrifugal fan 24 rotatably accommodated in the scroll portion, a blower motor 25 for driving the centrifugal fan 24 to rotate, and the like. This is a blowing means for generating an air flow. The heater core 13 is a heating heat exchanger that re-heats the air using cooling water (warm water) that cools the engine inside, and uses the cooling water as a heat source for heating.

The air mix door 14 is a flat door having a pivot shaft 26 provided at an end thereof as a pivotal position, and controls the amount of air passing through the heater core 13 and the amount of air bypassing the heater core 13. This is a blowout temperature adjusting means for adjusting the blowout temperature of the air blown into the vehicle interior. On both end surfaces of the air mixing door 14, a packing 27 for improving the sealing performance when opening and closing the hot air passage 18a and the cold air passage 18b formed in the air passage 18 is provided with a bonding means such as an adhesive. Mounted using.

The first outlet mode switching door 1 has a door body made of a resin material such as PP (polypropylene) resin.
As shown in FIG. 2, the first air outlet mode switching door 1 is a flat door having a pivot shaft 31 provided at a substantially central portion as a pivot position, and includes a first and a second ventilation passage. Foot (FOOT) for selectively opening and closing the first and second ventilation passages 21 and 22
The door. The first and second air passages 21 and 22 and the third air passage 2 are provided at both end surfaces of the first air outlet mode switching door 1.
A door packing (resin member such as polyurethane foam) 32 for enhancing the sealing performance when the door 3 is opened and closed is attached using a bonding means such as an adhesive.

The second outlet mode switching door 2, like the first outlet mode switching door 1, has a door body made of a resin member such as PP (polypropylene) resin. This second outlet mode switching door 2 is, as shown in FIGS.
A face differential (F / D) for selectively opening and closing the first ventilation path 21 and the second ventilation path 22 with a flat door having a pivot shaft 33 provided at a substantially central portion as a pivoting position. The door. Door packings (resin members such as polyurethane foam) 34 for improving the sealing performance when the first ventilation passage 21 and the second ventilation passage 22 are opened and closed are provided on both end surfaces of the second air outlet mode switching door 2. Are attached using joining means such as an adhesive.

As shown in FIGS. 1 and 3, a packing 35 is provided on the side surface of the second outlet mode switching door 2 in the thrust direction, that is, near the center of the opposing surface facing the inner wall surface of the unit case 11. Are attached using joining means such as an adhesive. The packing 35 is a part corresponding to the sliding member of the present invention, for example, a resin member such as polyurethane foam having a width of 6 mm to 8 mm and a length of 2 mm.
It is formed in a substantially quadrangular prism shape having a height of about 0 mm and a height of about 2 mm to 3 mm. The packing 35 may be formed integrally with the door packing 34 as long as it can be formed.

In this embodiment, the inner wall of the unit case 11 facing the packing 35 is provided with
As shown in FIGS. 3 and 4, substantially oval-shaped ribs 36 and 37 to which the packing 35 is pressed are integrally formed. These ribs 36 and 37 are portions corresponding to the ridges of the present invention, and are provided within the entire rotation range of the rotation trajectory of the second outlet mode switching door 2 within the entire rotation range. Are provided so as to contact different parts of the packing 35 according to the rotation angle of the packing 35.

That is, the ribs 36 and 37 are brought into contact with a plurality of portions of the packing 35 or portions of a predetermined range or more within the entire rotation range of the rotation trajectory of the second outlet mode switching door 2. It works to suppress the movement (self-excited vibration) of the two outlet mode switching door 2. Ribs 36, 37
Are formed on a straight line in a direction perpendicular to the rotating shaft 33 so as not to form an arc shape with the rotating shaft 33 as a center, and are formed at positions slightly shifted in parallel with each other. Further, each corner of the ribs 36 and 37 is formed in an R shape in order to smooth the damage of the packing 35 and the movement of the second outlet mode switching door 2.

Next, an operation panel P of a manual air conditioner for a vehicle will be described with reference to FIG. Here, FIG. 5A is a diagram showing an operation panel P of the manual air conditioner. The operation panel P includes an air conditioner switch 41,
An air volume setting lever 42, a temperature control lever 43, an inside / outside air switching lever 44, and an air outlet switching lever 45 are provided.

When the air outlet switching lever 45 is moved from the left side to the right side in the figure, the air outlet mode is changed to a face (FACE) mode, a bi-level (B / B) mode.
L) mode, foot (FOOT) mode, foot differential (F / D) mode, and defroster (DEF) mode. When the outlet switching lever 45 is operated from the FACE position to the DEF position, the first and second outlet mode switching doors 1 connected to the outlet switching lever 45 via a link device or a control cable. The second door opening is changed as shown in FIG. 5B.

[Operation of Embodiment] Next, the operation of the vehicle air conditioner of this embodiment will be briefly described with reference to FIGS.

When an occupant of the vehicle moves the outlet switching lever 45 provided on the operation panel P from the FACE position to the DEF position, a link is established via a control cable in accordance with the operation amount (stroke) of the outlet switching lever 45. The device rotates. Therefore, the first air outlet mode switching door 1 moves the third air passage 2 from the position where the third air passage 23 is fully closed.
After moving through the position where the third air passage 3 is fully opened, it moves to the position where the third air passage 23 is fully closed, and the second outlet mode switching door 2 completely closes the first air passage 21 and opens the second air passage 22 fully. (FIG. 3
From the position indicated by the two-dot chain line) to the position where the first ventilation passage 21 is fully opened and the second ventilation passage 22 is fully closed (solid line position in FIG. 3).
As a result, in the FACE mode, the air was blown into the vehicle compartment only from the FACE outlet 16;
In the mode, air is blown into the vehicle compartment only from the DEF outlet 15.

At this time, as shown in FIG. 3, the packing 35 provided integrally with the second outlet mode switching door 2 rotates while the second outlet mode switching door 2 rotates.
The rib 3 integrally formed on the inner wall surface of the unit case 11
6 and 37, different portions of the packing 35 are always compressed by the ribs 36 and 37, for example, regardless of the rotational position while the second outlet mode switching door 2 rotates. Thereby, the second outlet mode switching door 2
Second outlet mode switching door 2 regardless of the pivot position
Self-excited vibration can be prevented.

[Effects of the Embodiment] As described above, in this embodiment, the second outlet mode switching door 2 is reciprocated in the rotating direction by operating the outlet switching lever 45.
Even if the packing 35 is compressed by the ribs 36 and 37, the compressed portion of the packing 35 is gradually changed, so that the restoring force (repulsive force) of the packing 35 is not weakened. For this reason, the reduction of the self-excited vibration prevention effect of the second outlet mode switching door 2 due to the packing 35 and the ribs 36 and 37 can be suppressed.

In this embodiment, the packing 35 made of a resin member such as polyurethane foam is used, and the corners of the ribs 36 and 37 are formed in an R shape. Door 2 is pivot shaft 3
When rotating about the center 3, the packing 35 is provided with the ribs 36 and 37.
, The movement of the second outlet mode switching door 2 becomes smooth, and the operation load of the outlet switching lever 45 for moving the second outlet mode switching door 2 can be reduced.
If the corners of the ribs 36 and 37 are sharp, the packing 35 may be broken. Since the ribs 36 and 37 are integrally formed on the inner wall surface of the unit case 11, the number of parts and the number of assembling steps can be reduced, so that the manufacturing cost can be reduced.

[Other Embodiments] In this embodiment, the present invention is applied to an air outlet switching device of a vehicle air conditioner.
The present invention may be applied to an opening adjustment device for an air mix door of a vehicle air conditioner. In this case, one ventilation path becomes a warm air path (a ventilation path passing through the heater core),
The other air passage is a cold air passage (air passage bypassing the heater core). In addition, the present invention, except for vehicles, ships, aircraft,
It may be applied to an air conditioner for a factory, a building, an apartment house or a home.

In the present embodiment, the linear ribs 36 and 37 are provided as the ridges. However, the ridges may have any shape as long as the shape is different from an arc having a radius centered on the rotating shaft 33. May be used. For example, a ridge having an arc shape, a single linear shape or a meandering shape may be provided. In addition, a sliding member is provided on the opposite side of one side of the plate-shaped door pivotally connected to the rotation shaft, and the inner wall surface of the air-conditioning case is positioned around the rotation axis.
It may be formed in a shape, and a ridge portion may be provided on the inner wall surface so as to intersect the opposite side at a predetermined inclination angle. Further, the shape of the sliding member such as the packing 35 may be freely changed according to the side shape of the plate-like door. For example, the shape of the sliding member may be a triangular cross section, a semicircular cross section, a meandering shape, or a V shape.

In this embodiment, the first outlet mode switching door 1 is formed by integrally molding the door body and the rotating shaft 31 with resin, and the door packings 32 are attached to both end surfaces of the door body. Or the like, and the rotating shaft and the packing may be assembled. Similarly, in the present embodiment, the second outlet mode switching door 2 is formed by integrally molding the door body and the rotating shaft 33 with resin, and the door packings 34 are attached to both end surfaces of the door body. A metal plate such as an iron plate may be used, and the rotation shaft and the door packing may be assembled. Further, in the present embodiment, the door packings 34 are attached to both end surfaces of the second outlet mode switching door 2,
One end surface of the second air outlet mode switching door 2 (the first air passage 21
The door packing 34 may be mounted only on the side end surface or the end surface on the second ventilation passage 22 side.

In the present embodiment, DE is used as one of the ventilation paths.
Although the first ventilation path 21 communicating with the F outlet 15 is used, and the second ventilation path 22 communicating with the FACE outlet 16 is used as the other ventilation path, it may be reversed. In the present embodiment, the plate-shaped door is applied to the second outlet mode switching door 2, but the plate-shaped door may be applied to the first outlet mode switching door 1. Further, a plate-like door may be applied to the air mix door 14 and further may be applied to the inside / outside air switching door. In this embodiment, the centrifugal blower 1 is
2 and the heater core 13 are accommodated, but the unit case 11
A centrifugal blower 12 and an evaporator may be housed therein, or an evaporator may be housed between the centrifugal fan 12 and the heater core 13.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a main configuration of an air conditioning unit (embodiment).

FIG. 2 is a schematic diagram illustrating an entire configuration of an air conditioning unit (embodiment).

FIG. 3 is an explanatory view showing a rib position with respect to a rotation locus of a second outlet mode switching door (embodiment);

FIG. 4A is a plan view showing a rib shape, and FIG. 4B is a cross-sectional view showing a rib shape (embodiment).

5A is a plan view showing an operation panel of a manual air conditioner, and FIG. 5B is a graph showing a door opening degree of a first and second outlet mode switching doors with respect to a stroke of an outlet switching lever. (Embodiment).

FIG. 6A is an explanatory view showing a plate-like switching door and a rib, and FIG. 6B is a cross-sectional view showing a plate-like switching door and a rib (prior art).

[Explanation of symbols]

 2 Second air outlet mode switching door (plate-like door) 21 First air passage 22 Second air passage 33 Rotating shaft 35 Packing (sliding member) 36 Rib (protrusion) 37 Rib (protrusion)

Claims (3)

[Claims] (A) an air-conditioning case that forms a ventilation path through which air passes, and (b) an air-conditioning case that is provided inside the air-conditioning case so as to be rotatable around a rotation axis. A plate-like door for adjusting an opening degree; (c) a sliding member provided on a side surface of the plate-like door in the thrust direction and rotating integrally with the plate-like door; Within a predetermined rotation range of a rotation trajectory that rotates around the rotation axis, so as to contact different portions of the sliding member according to the rotation angle of the plate-like door, An air conditioner including a ridge provided on a portion of the air conditioning case facing the sliding member. 2. The air conditioner according to claim 1, wherein the sliding member is a packing made of urethane foam resin. 3. The air conditioner according to claim 1, wherein the ridge portion is formed integrally with a wall surface of the air conditioning case.