KR20010029367A - Door assembly for changing blow mode of vehicle air conditioner - Google Patents

Abstract

PURPOSE: A door assembly for converting blow mode for vehicle air conditioning system is provided, in which the door assembly consists of a rotating unit and a shield unit, to thereby simplify the structure of the assembly and reduce cost. CONSTITUTION: A door assembly comprises a rotating unit(30) having a rotation axis(32), and a pair of rotating wheels(34) attached to both ends of the rotation axis and which has a plurality of stoppers(35) formed along the outer periphery of the rotating wheel; a flexible shield unit(40) having a shield section(42) with a plurality of stopper holes(42a) formed at both ends of the shield section for insertion of stoppers formed at the rotating wheel, and an opening(44) formed at the intermediate portion of the shield section; and a pair of guide channels positioned adjacent to the rotating wheel of the rotating unit within a blower case, and which guide the flexible shield unit in a specific direction to move along a predetermined orbit at a position deviated from the rotating wheel. The flexible shield unit is interlocked with the rotating unit such that the stopper and the stopper hole are coupled/separated to/from each other in accordance with the rotation of the rotating unit.

Description

DOOR ASSEMBLY FOR CHANGING BLOW MODE OF VEHICLE AIR CONDITIONER}

The present invention relates to a door assembly for switching the blow mode of the air conditioner for controlling the air blowing direction through the branch duct of the car air conditioner, the structure is simple, the manufacturing cost is reduced, the ventilation resistance in the blow case It relates to a door assembly for switching the blowing mode of the vehicle air conditioner to help improve the blowing efficiency.

A vehicle air conditioner is a device that cools or heats a vehicle interior by introducing air from the outside to heat or cool the air and blow it into the interior of the vehicle. Blowing mode switching doors for blowing are provided.

In automotive air conditioning systems, heated or cooled air is blown through ducts, which normally serve as casings, which in turn diverge from the ducts and have branch outlets, eg ventilator ducts, having vents in each part of the room. Through a duct, a defroster duct, a floor duct, and the like, to each part of the room. Therefore, the ventilation mode switching doors mentioned at the beginning are provided between the branch ducts.

Figure 1 of the accompanying drawings is a schematic diagram showing a blowing path of the vehicle air conditioner is installed in the conventional blowing mode switching doors.

As shown, the air blowing of the air conditioner, the indoor air or outdoor air is introduced into the blow case (3) by the blowing fan (2) in accordance with the selection of opening and closing of the internal / outdoor air conversion door (1) to evaporator (4) Air passing through the evaporator 4 selectively passes through the heater unit 6 according to the opening / closing selection of the heating selection door 5, and then the blowing mode switching doors 7, 8 ( 9) branched according to the selection of opening and closing, and flows into the ventilator duct 10, the defroster duct 11 or the floor duct 12, and the ventilator grill 10a, the defroster grill 11a, the floor grill in the vehicle cabin. Discharged through 12a.

In the above blowing process, the conventional blowing mode switching doors (7) (8) (9) for branching the air introduced into the blowing case (3) into the respective ducts (10) (11) (12) The so-called panel type has a structure in which the rotary shaft is hinged to the wall of the blower case 3, and a cam interlocked by an operating lever on the instrument panel, and a plurality of links connected by pins to the cam to link the rotary shafts. It is operated by a drive means (not shown) comprising arms.

In such a configuration, the conventional doors 7, 8 and 9 for switching the blowing mode are integrally rotated with the respective arms by the rotation of the cam rotated by the operation of the operation lever instructing the blowing mode. As shown in FIG. 2, by selectively opening the respective ducts 10, 11, 12, the air introduced into the blower case 3 is blown to each part of the room.

However, in the case of using the conventional panel type blowing mode switching door as described above, the doors 7, 8, 9 must be installed for each of the ducts 10, 11, 12 and the door 7 Since the driving means for driving the (8) and (9) must be provided separately, the required number of parts is increased, which causes a problem that the structure is not only complicated but also the durability is low.

In order to solve the problems of the conventional panel-type blowing mode switching door has been invented by the present applicant, the cylindrical blowing mode switching door is at least two parts of the outer periphery as shown in FIG. The cylindrical case 20 having the openings 20a opened at the upper end of the case 20 is fixedly mounted, and the other end of the rotating shaft 21 is formed, the rotating shaft 21 It is rotatably mounted on the inner wall of the blower case (3). In addition, an elastic sealing member, such as a sponge 20b, is attached to the outer circumferential surface as an airtight member.

In the conventional cylindrical blower mode switching door of this structure, the openings 20a are appropriately set according to the adjacent angles between the branch ducts 10, 11 and 12 in contact with each other. Rotate by) to selectively open and close each branch duct (10, 11, 12).

As described above, the conventional cylindrical blower mode switching door is opened in the ventilation mode (Ventilation Mode) which blows into the cabin through the ventilator grill 10a (see FIG. 1) on the instrument panel as shown in FIG. 4A. Rotation angle is set so that only the ventilator duct 10 opens to the ventilator duct 10 so that air sucked into the blower case 3 by the blower 2 (see FIG. 1) flows into the ventilator duct 10 only. In this state, when the blowing mode is switched to the defrost mode for the frost control action of the windshield glass, as shown in FIG. 4B, the opening part 20a is rotated to one side to the defroster chin 11 side. By opening, the air sucked into the blower case 3 flows only into the defroster tuck 11. Arrows in the figure indicate the flow of air.

That is, the conventional cylindrical blower mode switching door as described above is simpler in structure than the conventional panel type blower mode switching door, which helps to reduce the manufacturing cost of the blower because the number of components is reduced.

However, according to the related art as described above, in the defroster mode, as the heating mode, that is, the heating selection door 5 is opened toward the heater unit 6 as shown in FIG. When the air is blown through the heater unit 6, the ventilation resistance is generated by hitting the blower mode switching door 20. Therefore, there is a problem in that the blowing efficiency is low, such as the air flow is not made smoothly in a particular mode.

The present invention has been made to solve the problems of the conventional cylindrical blower mode switching door, it is very simple in structure to help reduce the cost according to the air conditioning device manufacturing, and when using the conventional cylindrical blower mode switching door As described above, an object of the present invention is to provide a door assembly for switching a blowing mode of a vehicle air conditioner, which is helpful in improving the blowing efficiency by preventing a problem such as a decrease in blowing efficiency due to a ventilation resistance in the blowing case.

1 is a schematic diagram showing a blower path of a general vehicle air conditioner.

Figure 2 is a cross-sectional view of the operation of the conventional panel type blowing mode switching door.

Figure 3 is a perspective view showing the structure of a conventional cylindrical blowing mode switching door.

Figure 4a, 4b is a cross-sectional view showing the operation of the conventional cylindrical blowing mode switching door.

5 is an exploded perspective view illustrating a structure of a door assembly for switching a blowing mode according to an exemplary embodiment of the present invention.

6A, 6B, 6C, 6D, and 6E are cross-sectional views showing various blowing modes made by the operation of the present blower mode switching door assembly.

<Description of the code | symbol about the principal part of drawing>

3: blow case 10: ventilator duct

10a: ventilator grille 11: defroster duct

11a: defroster grille 12: floor duct

12a: floor grille 30: rotating body

32: rotating shaft 34: rotating wheel

35: locking projection 40: blocking member

42: blocking portion 42a: locking hole

44: opening 50: guide channel

The door assembly for blowing mode switching according to the present invention includes a rotating shaft and a rotating body which is attached to both ends of the rotating shaft and has a pair of circular rotating wheels having a plurality of locking projections on an outer circumferential surface thereof; The blocking portion is formed with a plurality of engaging holes in which the engaging projections are inserted into the both ends and the opening portion in the middle of the blocking portion, the locking projection and the engaging holes are sequentially coupled and separated in accordance with the rotation of the rotating body A flexible blocking member interlocked with the rotating body; And a pair of front and rear guide channels positioned close to the rotating wheels of the rotating body in the blower case to guide the flexible blocking member in a specific direction so as to move along a predetermined trajectory from the position away from the rotating wheels.

Hereinafter, exemplary embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

In the description of the present embodiment, the same reference numerals are used for the configurations of the present invention that are the same as the prior art described at the outset, and only the parts that are improved so as not to overlap with the prior art for clarity will be mainly described.

First, the door assembly for switching the blowing mode of the vehicle air conditioner according to the exemplary embodiment of the present invention is attached to both ends of the rotary shaft 32 and the rotary shaft 32, as shown in FIG. It consists of a rotating body 30 consisting of a pair of circular rotating wheels 34, 34 having a) and a flexible blocking member 40 that is interlocked with the rotating body (30).

The blocking member 40 is composed of a blocking portion 42 having a plurality of elongated bands connected in the lateral direction, and an opening portion 44 formed over a predetermined section in the middle of the blocking portion 42 and curved. A thin plate made of iron or synthetic resin having a thickness of less than 1 mm so as to be freely flowable along each side thereof, and a locking hole 42a in which the locking projections 35 of the rotating body 30 are detachably coupled to both edges thereof. Is formed.

In addition, the rotor 30 is rotatably installed around the rotation shaft 32 between the branch ducts 10, 11, 12 in the blower case 3, and the blocking member 40 is rotated. It is in contact with the whole 30 in a form that can be interlocked.

On the other hand, a driving means (not shown) for rotating the rotating body 30 is provided on the outside of the blower case 3, and the driving means is engaged with the driven gear and the driven gear connected to the rotating shaft 32, It consists of a combination of drive gears and the like that receive power from the drive motor and rotate.

The blower mode switching door assembly configured as described above is opened in the process of rotating the rotating body 30 by the drive means the blocking member 40 associated with both of the rotating wheels 34, 34 is moved by curvature. The blowing mode is switched by changing the position of the section 44. The operation of the present blowing mode switching door assembly will be described in more detail as follows.

First, in the Ventilation Mode, which is blown into the vehicle cabin through the Ventilator Grill 10a on the instrument panel, the ventilating duct 10 of the opening 44 of the blocking member 40 is shown in FIG. 6A. Located at the inlet, the defroster duct 11 and the floor duct 12 are blocked by the blocking portion 42 of the blocking member 40, so that the blowing operation is performed only through the ventilation duct 10.

In this state, when the blowing mode is switched to the so-called bi-level mode which is blown through the ventilator grille 10a and the floor grille 12a in both directions, as shown in FIG. Is rotated clockwise by a predetermined angle so that the opening 44 is positioned between the inlet of the ventilation duct 10 and the inlet of the floor duct 12, and thus, Two-way blowing is done. At this time, the defroster duct 11 is still kept blocked by the blocking portion (42).

When the air blowing mode is switched to the floor mode, the rotor 30 is further rotated clockwise by a predetermined angle as shown in FIG. 6C, and the opening 44 is opened at the entrance of the floor duct 12. By being located in the blow through the floor duct 44 is made. In the floor mode, some air must also be blown through the defroster grill 11a so that the air is circulated well, so the upper end of the blocking part 42 of the blocking member 40 has a state in which the inlet opening of the defroster duct 11 is slightly opened. Will be maintained.

Subsequently, in the so-called mix mode in which the blower air is equally divided through the defroster grill 11a and the floor grille 12a and introduced into the vehicle interior, the rotating body 30 is further rotated in a clockwise direction, and thus, FIG. 6D. Opening 44 is partially located at the floor duct 12 inlet as shown, and the blocking section 42 (blackened portion in the drawing) at the top of the blocking member 40 is the inlet of the defroster duct 12. Will remain partially open.

Finally, in the defrost mode, which is used for the purpose of removing the frost formed on the windshield glass, the blocking portion 42 is rotated by the rotation of the rotor 30 and the ventilator duct 10 and the floor duct. The inlet of (12) is blocked, and only the defroster duct 11 is opened, so that a blowing operation is performed only through the defroster grille 12a.

In the blower mode switching door assembly having the operation structure as described above, the blocking portion 42 of the blocking member 40 which is released from the rotating wheel 32 in accordance with the rotation of the rotating body 30 is connected to the front and rear guide channels 50. The guide channel 50 is moved close to the branch wall constituting each branch duct 10 (11, 12) so as not to block the air flow path in the blower case 3 by being drawn. The air flowing in the blower case 3 is blocked by the blocking portion 42 of the blocking member 40 so that a problem such as a ventilation resistance does not occur.

As such, the door assembly for switching the blowing mode of the vehicle air conditioner of the present embodiment is not limited to the adjacent angle or size between the branch ducts 10 (11) and 12, and the size and shape of the rotary wheel 32 and the blocking member. Only the size and structure of 40 can be changed and applied to all models.

As described above, the door assembly for switching the blowing mode of the vehicle air conditioner of the present invention is composed of only one rotating body and the blocking member interlocked with the rotating body, so it is structurally very simple to reduce the cost of manufacturing the air conditioning apparatus It helps. In particular, according to the present door assembly, there is also an advantage in that the blowing efficiency is improved because there is no problem such as a decrease in blowing efficiency due to a ventilation resistance in the blowing case as in the case of using a conventional cylindrical blowing mode switching door.

Claims (5)

A rotating body (30) comprising a rotating shaft (32) and a pair of circular rotating wheels (34) (34) attached to both ends of the rotating shaft (32) and having a plurality of locking projections (35) on an outer circumferential surface thereof; It is a form provided with a blocking portion 42 formed with a plurality of engaging holes (42a) for inserting the engaging projection 35 in both ends and the opening portion 44 in the middle of the blocking portion 42, the rotating body ( 30 is made of a flexible blocking member 40 interlocked with the rotating body 30 in such a manner that the locking protrusion 35 and the locking hole 42a are sequentially coupled and separated according to the rotation of 30; It is installed between each branch duct 10, 11, 12 in the blower case 3, and the flexible blocking member 40 is bent to move in accordance with the rotation of the rotor 30 to open the portion ( By changing the position of 44, the blower mode switching door assembly for selectively venting at least one of each branch duct (10, 11, 12) The method of claim 1, Located in the blower case 3 in close proximity to the rotary wheel 34 of the rotating body 30 to guide the flexible blocking member 40 in a specific direction so as to move along a certain trajectory at a position away from the rotary wheel 34. Blowing mode switching door assembly further comprises a pair of front and rear guide channel (50). The method according to claim 1 or 2, The flexible blocking member 40 is a blower mode switching door assembly, characterized in that the steel sheet. The method according to claim 1 or 2, The flexible blocking member 40 is a blower mode switching door assembly, characterized in that the synthetic resin thin plate. The method of claim 3, The flexible blocking member 40 is a blower mode switching door assembly, characterized in that the thickness is less than 1 mm.