JPS6146005Y2 - - Google Patents

Description

[Detailed Description of the Invention] Purpose of the Invention (Field of Industrial Application) The present invention relates to an improvement of a support structure for a switching door of an automobile air conditioner.

(Prior Art) Generally, as shown in FIG. 1, an air conditioner for an automobile includes an intake unit 1 having a built-in suction fan 4, a cooler unit 2 having a built-in evaporator 5, and a heater unit 3 having a built-in heater core 6. After the outside air or inside air, or a mixture thereof, which is selectively introduced into the intake unit 1 by switching the intake door 10, is cooled down in the cooler unit 2, all or all of them are cooled in the heater unit 3 as needed. Air at a desired temperature is blown into the vehicle interior through optional ducts 11, 12, and 13, with or without heating a part of the air.

In this automotive air conditioner, switching of the introduced air and switching of the air outlet is normally performed by operating various control levers (not shown) on the instrument panel that are linked via wires, actuators, etc. , 3 by opening and closing the doors 8, 9, 10 provided at the ducts 11, 12, 13 and the intake ports 14, 15 of the ducts 11, 12, 13, and 3, respectively. Conventionally, the various doors 8, 9, and 10 described above have adopted a so-called cantilever support structure in which one end is attached to a rotating shaft, and the ducts 11, 12, 13 or the intake ports 14 and 15 are opened and closed. In addition, the conventional differential duct 12 and foot duct 13 both blow warm air and open and close at the same time, and it is not desirable to provide a door for each duct and open and close it separately, which complicates the door opening and closing mechanism. Therefore, it is provided so that it can be opened and closed by a single door 9. That is, the differential duct 12 and the foot duct 13
A central duct opening 16 is provided on the upstream side of the duct, and by closing the duct opening 16, each duct 12, 13 is blocked, and the amount of air flowing into each duct 12, 13 is controlled by changing the opening degree of the door 9. It is designed to adjust.

(Problem to be solved by the invention) However, since the above-mentioned conventional door mechanism uses one end of the door as the center of rotation, it is easily affected by wind pressure, resulting in a large rotational moment and the need for a large switching operation force. It requires shortcomings. In addition, when the central duct opening 16 is provided and the opening and closing of the differential duct 12 and floor duct 13 are controlled by a single door 9, even in bilevel or heat mode,
Since the wind is preferentially blown out from the fully opened differential duct 12, the amount of wind directed toward the feet of the passenger is reduced accordingly, reducing the effect of cooling the head and heating the feet in the bilevel mode.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a door mechanism for an air conditioner for an automobile, which can switch between two types of doors by operating a single axis, and which has a relatively small operating force and a simple structure.

Structure of the invention (means for solving problems) In order to achieve the above object, the present invention selectively introduces outside air or inside air, cools it and/or heats it, and then blows out the air from an arbitrary duct. In the harmonization device, two types of ducts are arranged side by side on one axis, and a door rotation axis operated by a mode switching means is installed to cross both the ducts, and two types of doors open and close each duct. are attached to the door rotation axis so as to be perpendicular to each other and positioned approximately symmetrically with respect to the door rotation axis.

(Example) Hereinafter, the configuration of the present invention will be described in detail based on an example shown in the drawings.

FIG. 2 shows a principle diagram of an embodiment in which the door mechanism of the present invention is applied to a heater unit. This heater unit is an improved version of the foot duct and differential duct, and the foot door side is movable. In this embodiment, illustrations and explanations of the intake unit and cooler unit, which have the same configuration as a known air conditioner for an automobile, will be omitted, and only the heater unit will be explained.

This heater unit 33 is installed in the unit case 3.
9 is divided into two flow paths by a partition wall 43, and a heater core 30 is installed in one of the flow paths, and cold air and hot air are appropriately mixed or not mixed, and air at a desired temperature is distributed. It is structured in a method. In this heater unit 33, the vent duct 40 is opened near the inlet 41 and at a position where the introduced air can be directly blown out without passing through the heater core 30. Further, the differential duct 32 and the foot duct 31 are arranged next to each other and open downstream of the heater core 30, respectively. A mixer door 44 is provided upstream of the heater core 30 to change the amount of air passing through the heater core 30 to change the temperature of the mixer.

As shown in FIG. 3, the differential duct 32 and the foot duct 31 are arranged side by side on one axis with the foot duct 31 sandwiched therebetween, with the differential duct 32 positioned on both sides thereof. For example, the semi-cylindrical cover 34 is divided into three parts in the axial direction by the partition wall 50.
are connected to the heater unit case 39 and communicated with each other. At this time,
The differential ducts 32 at both ends are opened in the axial direction from both end surfaces of the semi-cylindrical cover 34 (indicated by reference numeral 51),
The central foot duct 31 is radially open (indicated by reference numeral 52).

A door rotation shaft 35 that traverses the ducts 31 and 32 is rotatably disposed at the center thereof, and doors 36 and 37 that close the ducts 31 and 32 are attached. The foot door 36 and the differential door 37 are arranged and attached in a so-called butterfly configuration so as to be perpendicular to each other and positioned approximately symmetrically about the center of the door rotation axis 35. Further, the differential door 37 is fixed to the door rotation shaft 35, but the foot door 36 is loosely fitted to the door rotation shaft 35 so that it can rotate freely, and is connected to the differential door 37 via a torsion spring 38. There is. That is, the differential door 37 and the foot door 36 are normally in a perpendicular state, but when the foot door 36 is in contact with the heater unit case 39, the differential door 3 is opened while twisting or opening the torsion spring 38.
Only 7 rotations are allowed. Therefore, by advancing or returning the rotation of the rotation shaft 35 while the foot duct 31 is closed, the differential door 37 can be opened.
It is possible to change the relationship between the foot door 36 from an orthogonal state to a parallel state or vice versa, and to close the differential duct 32 and the foot duct 31 at the same time, or to close only the differential duct 32 (see Fig. 8a-8). b). The door rotation shaft 35 projects outside the heater unit case 39 and is connected to a link 53 operated by an actuator or cam link mechanism that is linked to a controller (not shown) of the instrument panel.

According to the heater unit 33 configured in this way, if the door rotation shaft 35 is rotated 1/8 from a state where the differential door 37 is closed and the foot door 36 is open (heater mode), with the vent duct 40 closed, Both the foot door 36 and the differential door 37 are in a half-open state, and air is evenly blown out from both ducts 31 and 32 (default mode), and when further rotated, the foot door 36 is closed and the differential door 37 is in an open state (default mode). Therefore, vent duct 4
If the rotation of the rotation axis 35 is further advanced while opening 0,
The foot door 36 is in contact with the heater unit case 39 and cannot rotate, but it rotates idly and twists the torsion spring 38 while allowing the differential door 37 to rotate.
The def duct 32 will be closed (vent mode). In addition, the vent mode is normally used when cooling the vehicle, but by switching to the bi-level mode when the vehicle is fully cooled, cold air is blown out from the feet at the same time, making it possible to rapidly cool the vehicle and improve the cooling sensation.
At this time, since no cold air flows through the differential duct 32, fogging of the windshield can be prevented.

The embodiments described above are merely examples, and various modifications can be made without departing from the gist of the present invention.

For example, Fig. 6 shows the foot door 36 and the differential door 3.
7 is fixed to the door rotation shaft 35. The door rotation shaft 35 and each door 36, 37 are usually integrally formed of synthetic resin or the like, but it is also possible to form separately molded parts and integrate them by gluing, pin joining, screwing, etc. . However, when the foot door 36 and the differential door 37 are each fixed to the door rotation shaft 35, it is not possible to close the hood duct 31 and the differential duct 32 at the same time. 31 and/or the differential duct 32. Therefore, both ducts 31 and 32
Both ducts 31, 3 are installed on the upstream side of the heater core outlet side.
A switching door 48 is provided to block the flow path to 2.

According to this embodiment, in the vent mode, the flow path leading to the differential duct 32 and the foot duct 31 is closed by the switching door 48 to prevent air from flowing into the differential duct 32 and the foot duct 31. Then, the mixer door 44 is opened appropriately, and part of the introduced air is directly discharged from the vent duct 40, and at the same time, part of the introduced air is turned into warm air through the heater core 30, and then introduced into the vent duct 40, where it is mixed before reaching the air outlet. It is blown out at the appropriate temperature. In addition, in order to improve the cool feeling by blowing cold air not only from the vent duct 40 but also from the foot duct 31 during full cooling, the switching door 48 is opened and the door rotation axis 35
1/4 turn to open the foot door 36 and leave the vent door 42 in a half-open state.

FIG. 7 shows another embodiment in which the foot door 36 and the differential door 37 are fixed to the door rotation shaft 35. In the vent mode, when the vent door 42 is in the fully open position, only cold air reaches the vent duct 40.
Further, in the bilevel mode, when the vent door is set at a half-open position and the foot duct is opened, cold air is blown out from the vent duct and warm air is blown out from the foot duct 31. Further, in the heater mode and the differential mode, the vent door 42 is closed and either the foot duct 31 or the differential duct 32 is opened, thereby enabling the heater mode or the differential mode.
Further, by opening the foot duct 31 and the differential duct 32 at the same time, a differential foot mode can also be realized.

Furthermore, although not shown, it can also be applied to an intake unit. In this case, the outside air intake and the inside air intake are arranged side by side on one axis, and the doors that open and close each intake are butterfly-shaped on the door rotation axis that crosses the center of both intakes so that they are perpendicular to each other. Fixed to model. According to this embodiment, when the outside air intake side is closed, the inside air intake side opens,
If set to the intermediate position, both intake ports will be in a half-open state. Although not shown, it is also possible to arrange the def duct and the vent duct in parallel, or to arrange the foot duct and the vent duct in parallel. In the case of the latter combination of foot duct and vent duct, bilevel mode can be obtained by leaving the two types of coaxial doors partially open, and heater mode can be obtained by closing either one of the ducts. Vent mode is available.

Effects of the invention As described above, the door mechanism of the automotive air conditioner of the present invention can be used in two types of automotive air conditioners that selectively introduce outside air or inside air, cool and/or heat it, and blow it out from an arbitrary duct. ducts are arranged side by side on one axis, and a door rotation axis operated by a mode switching means is installed across both ducts, and two types of doors for opening and closing each duct are arranged orthogonally to each other. Since the door is attached to the door rotation axis so as to be positioned almost symmetrically around the rotation axis, opening and closing of two types of doors can be controlled simultaneously by operating one axis. That is, the door control mechanism can be simplified. In addition, since the two types of doors are installed in a butterfly style that is symmetrical about the rotation axis and are arranged orthogonal to each other, the wind pressure acts equally on the seesaw-shaped doors that swing around the door rotation axis, and the two types of doors are arranged in a butterfly style that is symmetrical about the rotation axis. Since they cancel each other out, switching operations can be performed with minimal operating force without being affected by wind pressure. Furthermore, the door mechanism of the present invention controls the opening and closing of two types of ducts using a single rotating shaft, but since both ducts can be opened and closed independently using separate doors, only the necessary ducts can be opened and closed. Air can be blown out and there is no leakage to other ducts.

[Brief description of the drawings]

Fig. 1 is a schematic explanatory diagram showing an embodiment of a conventional air conditioner for an automobile, and Fig. 3 is a principle showing an embodiment in which the door mechanism of the air conditioner for an automobile according to the present invention is applied to a heater unit part. Figure 3 is a perspective view of the door mechanism, Figure 4 is a plan view showing the door support mechanism, Figure 5 is a side view of the door support mechanism, and Figure 6 is a heater unit to which the door support mechanism of the present invention is applied. It is a schematic explanatory drawing which shows another Example. FIG. 7 is a schematic sectional view showing a third embodiment of a heater unit to which the door support structure of the present invention is applied. 8a to 8d are explanatory diagrams showing the movement of the door mechanism of FIG. 3. FIG. 31, 32...Foot duct and differential duct corresponding to two types of ducts, 35...Door rotation axis, 3
6, 37...Foot door and differential door, which correspond to two types of doors.

Claims (1)

[Scope of utility model registration request] In an automotive air conditioner that selectively introduces outside air or inside air, cools and/or heats it, and blows it out from an arbitrary duct, two types of ducts are arranged side by side on one axis, and a door is operated by a mode switching means. A turning axis is installed to cross both of the ducts, and two types of doors for opening and closing each duct are installed on the door turning axis so as to be orthogonal to each other and positioned approximately symmetrically about the door turning axis. A door mechanism for an automobile air conditioner characterized by comprising: