JPH10217749A - Door mechanism of air conditioner for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device in which ventilation resistance is low, operation is smooth, sealing property and air conditioning performance are excellent, and abnormal sound is not generated, by extending a door in the direction intercepting air flow blown off from the upper stream side air passage, and forming it into a circular-arc shape so as to swell out on the lower stream side at prescribed radius of curvature. SOLUTION: A case C is provided with an evaporator 3 in the upper stream side air passage 10, and a heater core 4 in the lower stream side air passage 11. A door D is provided with a door main body 12 which is extended in the direction intercepting air flow from the upper stream side air passage 10, and formed into a circular-arc shape so as to swell out on the lower stream side at prescribed radius of curvature. On both end parts of the door main body 12, a toothed part 17 meshing with a partial gear 20 of a driving part is continuously formed from the upper end to the lower end. At a heating mode, the door main body 12 is positioned on the upper end, and at a cooling mode, the door main body 12 is positioned on the lowermost end. Hereby, the air flow runs against the circular-arc door, and hence ventilation resistance does not rise so as to make favorable air conditioning possible.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door mechanism of an air conditioner for a vehicle, which slides in a narrow portion to smoothly control an air flow.

[0002]

2. Description of the Related Art In general, an air conditioner for a vehicle has an intake unit for introducing inside and outside air, a cooler unit for cooling the introduced air, and a heater unit for heating the introduced air. These three units are connected in series. It is well known that they are integrated and installed in a narrow space below an instrument panel in a vehicle cabin.

[0003] However, this air conditioner for automobiles has the following problems.
Since the two units are connected in series, the entire device becomes large, and if it is mounted on a small vehicle, it is not preferable because the narrow interior space of the vehicle becomes smaller.

Therefore, as shown in FIG. 9, the cooler unit 1 and the heater unit 2 are arranged very close to each other, and these two units are connected and arranged so as to be located in the front-rear direction of the vehicle. In some cases, the dimension L is reduced and the dimension in the vehicle width direction is also reduced. This unit is made compact by reducing the size between the evaporator 3 and the heater core 4 and also reducing the size of a mix door (hereinafter simply referred to as a door) 5 for producing cold air and hot air.

Here, as is well known, a low-temperature and low-pressure refrigerant flowing through a cooling cycle flows through the inside of the evaporator 3, and the air introduced therein is cooled by heat exchange with the refrigerant to produce cool air. Things. In the heater core 4, high-temperature engine cooling water flows through the inside, and the air introduced therein is heated by heat exchange with high-temperature engine cooling water to generate hot air.

In the drawing, reference numeral "6" denotes a differential door for opening a differential opening 6a in a defrost mode for clearing fogging of windows, and reference numeral "7" denotes a vent door for opening a vent opening 7a in a vent mode for blowing cool air to the upper body of an occupant. Reference numeral "8" denotes a foot door that opens the foot opening 8a in the foot mode in which warm air is blown to the lower body of the occupant.

[0007] The unit configured as described above includes a door 5.
As a result, it is difficult to control the distribution of cold air and hot air, and in some cases, it may be necessary to provide an auxiliary door 5a indicated by a broken line in the figure to control the amount of air flowing into the heater core 4. In this case, the configuration becomes complicated, and it is not preferable in terms of cost.

For this reason, recently, an air conditioner for a vehicle having a more compact structure as shown in FIG. 10 has been proposed (see Japanese Utility Model Laid-Open No. 6-71222).

In this apparatus, a cooler unit 1 and a heater unit 2 are integrated, and an evaporator 3 and a heater core 4
Are arranged further close to each other to make the device compact. That is, the evaporator 3 and the heater core 4
When the door 5 supported by one fulcrum is pivoted about the fulcrum as in the case of the mixed door 5 shown in FIG. 9 (shown are two doors 9a,
9b, which is connected to a door operating mechanism consisting of a link mechanism via pins pa and pb), and slides it up and down along a rail 9c to perform temperature control.

[0010]

However, a vertically slidable door mechanism has a high ventilation resistance and has a problem in operability. That is, since the door disclosed in the above publication is a flat, straight door 9, the flowing air flow collides at a right angle, the airflow resistance is extremely high, and the amount of air flow is reduced. For this reason, the feeling of cool air especially during cooling is poor, which is not preferable.

Further, in order to prevent air leakage from the peripheral portion of the door 5, a gap must be formed between the rail 9c and the door 9, but if the gap is made too narrow, the sliding of the door 5 may occur. The resistance increases and the door does not work smoothly. The same is true even if a sealing material is provided between the door 5 and the rail 9c. In addition, there is also a trade-off problem that if a gap is formed to facilitate the door operation, there is a possibility that air leakage may occur.

Further, if the slide mechanism is constituted by a link mechanism as in the door described in the above-mentioned publication, play is likely to occur in the connection between the pin and the link when the door is operated.
When wind pressure is applied to the door when air flows, abnormal noise due to backlash is generated, which propagates into the passenger compartment, and may cause discomfort to the occupant.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and has a low airflow resistance, can be operated smoothly, and has excellent sealing properties and temperature control characteristics while reducing the size of the unit. It is another object of the present invention to provide a comfortable door mechanism of an air conditioner for a vehicle, which does not generate noise.

[0014]

According to the first aspect of the present invention, there is provided a method for selectively flowing an air flow flowing down from an upstream air passage to two branched downstream air passages. Or a door of a predetermined size arranged to flow air at a predetermined ratio to each downstream air passage, and a regulating member for regulating the door operation on the upstream side and the downstream side of the door is provided on the door. In an air conditioner for vehicles that exists in close proximity,
The door is formed in a circular arc shape so as to extend in a direction in which the airflow blown out from the upstream air passage is shut off and to bulge downstream with a predetermined radius of curvature in the airflow direction.

According to this structure, while the unit is made compact, the airflow flowing down from the upstream air passage hits the arc-shaped door, so that the airflow resistance does not increase and the amount of air flow does not decrease. The flow direction can be changed smoothly. For this reason, preferable air conditioning can be performed without the feeling of cool air particularly during cooling.

According to the second aspect of the present invention, the door body is
It is characterized in that it slides up and down in the direction of gravity. In this case, the door itself has an arc shape that swells with a predetermined radius of curvature downstream in the flow direction of the air flow, so that the door The door is hardly affected by gravity moving the door in the vertical direction, the door operates with a predetermined control amount, and controllability is improved.

According to the third aspect of the present invention, the door includes a groove cam formed in the case forming the air passage so as to bulge toward the downstream side in the air flow direction with a predetermined radius of curvature. A guide member provided on the door body is connected to a slide mechanism including a tooth portion formed on the door body, a gear meshed with the tooth portion, and a drive unit for rotating the gear. It is characterized by moving along a cam.

According to this configuration, since the door body is driven by gears, the operation is smooth, the operability of the door is improved, and comfortable door control without generating abnormal noise can be performed.

According to the fourth aspect of the present invention, the door body is
The outer peripheral portion is flat and the inner portion is bulged, and the seal member is attached to the flat outer peripheral portion.

In this way, since the seal member may be attached to a part of the door body, it is not only economical, but also it is not necessary to unnecessarily increase the pressing force required for the seal. No large torque is required.

[0021] In the invention described in claim 5, the wind path is:
A support roller, which is formed in a case of the air conditioner for an automobile in which two casing pieces are interposed at the center and is provided at a center in a width direction of the door body and elastically abuts on the door body. It is characterized in that it is supported when two casing pieces are combined.

In this way, the supporting roller can be easily installed, and even if the door body is slightly deformed by the thermal influence from the evaporator or heater core provided close to the door body, a large wind pressure is applied to the door body. Thus, the door body can be prevented or corrected for deformation, and a predetermined door operation can be performed. Even if the slide mechanism is a gear type, it operates smoothly without abnormality such as tooth jumping operation when the gear is operated.

In the invention according to claim 6, the door body is
A heater core is provided in the airflow path through which the airflow blown out from the evaporator flows with a slight gap downstream of the evaporator, and the airflow blown out from the evaporator to the airflow path is entirely the heater core side or the heater core. A mixed door configured to flow to a bypass passage side for bypassing a heater core or to flow at a predetermined ratio to both sides, wherein the support roller is supported by a support wall of the heater core positioned at a center in a sliding direction of the door body. It is characterized by the following.

When the door body is used as a mixed door as described above, the door takes an upper end position, a lower end position, and a predetermined intermediate position. In any case, the door body is located at the center in the sliding direction of the door body. Supporting will usually result in dead space here. However, if the support roller is supported by the support wall of the heater core using this dead space, the support roller can be supported without generating useless space. In addition, since the mix door distributes air to the two downstream passages, the mix door takes an intermediate position. When the mix door is set at the intermediate position, desired control can be performed without rattling.

[0025]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an automotive air conditioner according to an embodiment of the present invention. FIG. 1 is a sectional view taken along line 1-1 of FIG. 2, FIG. 2 is a plan view of FIG. 1, and FIG. FIG. 4 is a schematic perspective view showing the door partially cut away, FIG. 5 is an end view along line 5-5 in FIG. 3, FIG. FIG. 8 is an explanatory view showing a groove cam portion, and FIG. 8 shows a support roller, and is a cross-sectional view taken along line 8-8 in FIG. Components common to those shown in FIGS. 9 and 10 are denoted by the same reference numerals.

As shown in FIG. 1, the door mechanism of the vehicle air conditioner according to the present embodiment is applied to a mixed door.

As shown in FIG. 1, the air conditioner for a vehicle has a case C in which a cooler unit 1 and a heater unit 2 are integrated and a dimension L in the longitudinal direction of the vehicle is shortened. The evaporator 3 is provided in the upstream air passage 10, and the heater core 4 is provided in the downstream air passage 11. In particular, these air passages 10 and 11 constitute a case C in order to facilitate assembly and manufacture.
It is formed by joining two casing pieces C1 and C2 (see FIG. 3) in the middle.

The air flowing down from the upstream air passage 10 is operated by a slide mechanism M operating a door D provided between the evaporator 3 and the heater core 4.
Air is selectively flown to the heater core 4 side and the bypass passage B side that bypasses the heater core 4, or air is flown at a predetermined ratio to each of the air passages of the heater core 4 side and the bypass passage B side.

Here, an evaporator 3 and a heater core 4 are provided close to each other on the upstream side and the downstream side of the door D, but these restrict the freedom of movement of the door D when the door D is operated. Therefore, these members are hereinafter collectively referred to as a regulating member K.

Further, the door D and the slide mechanism M will be described in detail.

First, the door D is extended between the evaporator 3 serving as the regulating member K and the heater core 4 in a direction in which airflow from the upstream air passage 10 is shut off, and swells downstream with a predetermined radius of curvature. The door main body 12 has an arc shape as described above.

As shown in FIG. 1, the door body 12
The vertical direction is about half of the opening 14 of the upstream air passage 10 and the downstream air passage 11, and the width direction is provided from one side of the case C to the other side as shown in FIG. is there.

The door body 12 is, as shown in FIG.
The outer peripheral portion is generally a flat flat portion 12a and the inside is a dome-shaped bulging portion 12b. On the outer surface of the bulging portion 12b, a flat portion 12a surrounding the outer circumference of the bulging portion 12b is formed of urethane foam or the like. Is adhered. However, the seal member 15 may be provided not only on the back surface of the bulging portion 12b but also on the abdominal surface side. In addition, the side end part of the door main body 12 in which the tooth part 17 described later is formed,
It has an arc-shaped cross section.

In the side end portion of the door body 12,
A pair of reinforcing plates 16 having functions of reinforcing the door body 12 and guiding the air flow are provided. Between the reinforcing plate 16 and the side end of the door main body 12, the tooth portion 1 meshed with the partial gear 20 in the driving portion 23 described later in detail.
7 are formed continuously from the upper end to the lower end.

Guide rollers 1 which are rotatably fitted into guide groove cams 19 protruding from an inner side wall of a case C, which will be described in detail later, are provided at upper and lower four side ends of the door body 12.
8 are projected. The guide roller 18 may be a cylindrical pin that does not roll in some cases.

Next, as shown in FIG. 3, a slide mechanism M for operating the door D is formed on a groove cam 19 formed on the inner wall of the case C and on one surface of the door body 12. A pair of partial gears 20 meshing with the teeth 17, a shaft 21 for interconnecting the partial gears 20, a driving gear 22 fixed to an end of the shaft 21, and a motor or a motor for driving the driving gear 22. And a drive unit 23 (see FIGS. 1 and 2) such as a motor actuator. The drive unit 23 may be a manual operation mechanism connected to the controller via a wire cable in some cases.

As shown in FIG. 7, the groove cam 19 is formed so as to have a radius of curvature r substantially equal to the radius of curvature of the door D, supports the four guide rollers 18 of the door body 12, and Even when the main body 12 receives wind pressure, it is operated without rattling. This groove cam 19
Although each of the inner walls is formed in a pair of upper and lower portions formed in an arc shape on each inner wall, it is preferable that this shape be an arc shape so as to swell to the downstream side with a predetermined radius of curvature r. In this way, when the door body 12 is used as a mixed door, when the door body 12 moves in the direction of gravity, that is, in the vertical direction,
Since the groove cam 19 supports the weight of the door body 12, the door is hardly affected by gravity when sliding up and down, and operates with a predetermined control amount, thereby improving controllability. Especially,
Since the upper guide roller 18 is fitted into the upper groove cam 19 and the lower guide roller 18 is fitted into the lower groove cam 19, the four guide rollers 18 prevent the influence of gravity.

The end portion 19a of each grooved cam 19 is located at a position where the door body 12 slides at the end position of the slide and intersects with the direction of the slide, that is, in the embodiment shown in FIG. It is formed to move.

Thus, the sealing member 15 is
, And is pressurized to improve the sealing performance. That is, the sealing member 15 does not always contact the partition wall 13 but only contacts it when necessary, so that the sealing property is prevented from being deteriorated for a long time, and the sealing property is improved. In the present embodiment, the contact member 13 with which the seal member 15 contacts uses the partition wall 13 of the case C, but may be provided separately.

Although the upper and lower groove cams 19 of this embodiment are separately formed, the present invention is not limited to this, and the guide roller 18 intersects the sliding direction at the end position. Any direction may be used as long as it moves in the direction of movement.
May have a shape that is continuous with each other. In this case, the moldability is improved when the case C is formed from a synthetic resin.

The slide mechanism M is provided with a groove cam 1.
9, a pair of partial gears 20, a shaft 21, and a drive gear 22. These are combined with the door D as one unit,
The unit may be inserted and attached from an opening formed in the side wall of the case C. In such a case, various types of units can be formed for each model,
It is possible to assemble an air conditioner for a vehicle while sharing the main parts.

The partial gear 20, as shown in FIG.
In order for the door body 12 to move in a direction intersecting the direction of the slide at the end position of the slide, the teeth formed at the end or the teeth in the vicinity thereof are high teeth 20a having a higher tooth height than the other teeth 20b. When the driving unit 23 rotates the partial gear 20, the high teeth 20 a press the door main body 12 via the teeth 17 formed on the door main body 12 and move along the groove cam 19. I am trying to do it.

On the other hand, the teeth 17 formed on the door body 12
As shown in FIGS. 5 and 6, the upper and lower ends or the teeth near the upper and lower ends are high teeth 17a whose tooth height is higher than the other teeth 17b. That is, as shown in FIG. 6, the tip of the high tooth 17a at the end of the tooth portion 17 has a radius r1 from the center O of rotation.
, R2, r3, r4 so that the door body 12 is aligned with the groove cam 19 without fail so as to mesh with the high tooth portion 20a of the partial gear 20 reliably. In the drawing, "rp" is a pitch circle.

As described above, the door body 12 is rotated by the pair of partial gears 20. When the door body 12 is relatively long in the width direction, there is a possibility that the door body 12 is deformed by wind pressure in the width direction. is there.

This deformation is not preferable from the viewpoint of the engagement with the gears and the controllability of the temperature control performed by the door main body 12. Therefore, as shown in FIG. Is preferably supported by the support roller 24, and the deformation of the door body 12 is preferably prevented by the support roller 24.

In this case, the support roller 24 is composed of a drum-shaped part 24a and a pair of elastic support arms 24b projecting in the axial direction from the drum-shaped part 24a. A support arm 24b is mounted in a concave portion 26 formed in a central partition wall 25 utilizing a rim, and the drum-shaped portion 24a is disposed so as to slightly protrude from the central partition wall 25. It is preferable to abut on No. 12.

The support roller 24 is connected to the central partition wall 2.
5, the two casing pieces C
Since the case C is formed by centering 1 and C2, if the case C is housed in the concave portion 26 of the center partition wall 25 which has been divided in advance at the time of molding, the case C is incorporated at the same time. be able to.

Next, the operation of the embodiment will be described. (Full Hot Mode) In the heating mode, in the case of the full hot mode in which the entire amount of cold air is heated and blown into the passenger compartment, the door body 12 is positioned at the upper end in FIG. 1, taken in from the intake unit, and cooled in the cooler unit. All of the generated air passes through the heater core 4.

In this case, the drive unit 23 is operated by a signal from a controller (not shown) to rotate the partial gear 20.
As a result, the partial gear 20 meshing with the teeth 17 formed on the door body 12 raises the door body 12 along the groove cam 19.

When the door body 12 rises and reaches the end position, the high tooth portion 20a of the partial gear 20 is moved to the door body 12
The door body 12 is pressed rearward by the partial gear 20 and moves rearward along the groove cam 19, so that the seal member 15 is formed on the partition wall 13 formed on the side wall of the case C. And pressurized.

As a result, the sealing performance of the door body 12 is improved, and no air leakage occurs, so that the temperature control characteristics are also excellent. In addition, since the door is moved by the gear drive, the operation is smooth, the operability of the door is improved, and comfortable door control without generating abnormal noise can be performed.

In this mode, the air cooled in the cooler unit collides with the arc-shaped door body 12, and the air flow is smoothly directed to the heater core 4 along the surface of the door body 12. Since the flow direction can be changed so as to face the air flow, the airflow resistance does not increase, the flow rate of air does not decrease, and the entire amount is guided to the heater core 4.

(Temperature Control Mode) In the cooling / heating mode, in a temperature control mode in which cold air and hot air are mixed and set to a predetermined temperature and then blown into the vehicle interior, the door body 12 is set at an intermediate position in the vertical direction in FIG. A part of the cool air from the cooler unit 1 passes through the upper space of the door body 12 and the remaining cool air passes through the lower space of the door body 12 and is guided to the heater core 4.

Also in this case, the driving unit 2 is controlled by the controller.
3 is operated, and the rotation of the partial gear 20 causes the door body 12 to rotate.
The guide roller 18 moves along the groove cam 19 to be in the middle position in the vertical direction. However, since this state is only the contact between the guide roller 18 and the groove cam 19, the sliding resistance is extremely small, and the operation is not performed. It is performed smoothly. The door body 12
The groove cam 19 supports the weight of the door body 12 when moving in the direction of gravity, that is, in the vertical direction. Therefore, the groove cam 19 is hardly affected by gravity. And controllability is improved.

Moreover, in this state, the partial gear 20 is held by meshing with the teeth 17 on the door body 12 side, and there is little possibility of displacement. Even if the position shift occurs, the position of the door is accurately set because it is the amount of the backlash between the partial gear 20 and the tooth portion 17 on the door body 12 side and is extremely small.

Then, the cold air and the hot air are combined and mixed to reach a predetermined temperature and are blown out into the vehicle interior. In this case, in the case of the arc-shaped door, although the airflow resistance increases to some extent, the air distribution property for distributing air in a predetermined direction is improved, so that the controllability is smaller than the air volume as in the case of the temperature control mode. When emphasis is placed, it is extremely effective.

(Full Cool Mode) In the cooling mode, in the case of the full cool mode in which all the cool air is blown into the vehicle interior without heating, the door body 12 is substantially located except for the position of the door body 12 at the lowermost end in the vertical direction. The operation of the door body 12 is the same as in the full hot mode, but in the full cool mode, the occupant sometimes desires a large amount of cold air. Also in this case, the flow direction of the air flow is changed so as to smoothly face the direction of the vent port 7a along the surface of the door body 12, so that the ventilation resistance does not increase,
A comfortable feeling of cool air is obtained without reducing the amount of air flow.

Particularly, in the full cool mode, a large amount of cold air collides with the door body 12, and the door body 12 which is relatively long in the width direction may be deformed rearward. In the first embodiment, since the center portion of the door body 12 in the width direction is elastically supported by the support rollers 24, even if a large wind pressure is applied to the door body 12, the door body 1
2 prevents deformation, and even with a gear-type slide mechanism,
There is no abnormality such as tooth skipping operation and the like, it operates smoothly, and there is no decrease in the temperature control characteristic due to the deformation of the door body 12. Further, even if the door main body 12 is slightly deformed by the thermal influence from the evaporator 3 and the heater core 4 provided in the vicinity, the deformation of the door main body 12 can be corrected.

Since the support roller 24 always supports the door main body 12, the vertical operation of the door main body 12 in the vertical arc is extremely smooth in any mode state, not only in the full cool mode. Become.

The present invention is not limited to the above-described embodiment, but can be variously modified without departing from the gist of the present invention. For example, the door to which the door mechanism according to the present invention is applied is not limited to a mixed door, and may be another door. In addition, the radius of curvature when the door is bulged in an arc shape downstream is determined by the size of each model or door,
What is necessary is just to set suitably according to an air volume etc., and various values can be selected.

[0061]

As described above, according to the first aspect of the present invention, since the airflow flowing down from the upstream air passage hits the arc-shaped door while reducing the size of the unit, the airflow resistance increases. In addition, the flow rate of air is not reduced, the flow direction can be smoothly changed, and a favorable air conditioning can be performed without a feeling of cold wind during cooling.

According to the second aspect of the present invention, since the door itself is formed in an arc shape swelling with a predetermined radius of curvature downstream in the flow direction of the airflow, the gravitational force for moving the door in the vertical direction is provided. , The door operates with a predetermined control amount, and controllability is improved.

According to the third aspect of the present invention, since the door body is driven by gears, the operation is smooth, the operability of the door is improved, and comfortable door control without generating abnormal noise can be performed.

According to the fourth aspect of the present invention, since the seal member may be attached only to the contact portion of the door body, not only is it economical, but also it is not necessary to unnecessarily increase the pressing force required for the seal. The drive unit for door operation does not require a large torque.

According to the fifth aspect of the present invention, the supporting roller can be easily installed, and even if the door body is affected by heat or wind pressure, deformation is prevented or corrected, and a predetermined door operation becomes possible. Even if the slide mechanism is a gear type, it operates smoothly.

According to a sixth aspect of the present invention, when the door body is a mixed door, the support roller can be supported without generating useless space, and when the door body is set at the intermediate position,
Desired control can be performed without play.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a horizontal sectional view showing a door mechanism.

FIG. 4 is a schematic perspective view showing a door partially broken away.

FIG. 5 is an end view taken along line 5-5 in FIG. 3;

FIG. 6 is an explanatory diagram showing a main part of a door in an enlarged manner.

FIG. 7 is an explanatory view showing a groove cam portion.

FIG. 8 is a sectional view showing a support roller.

FIG. 9 is a cross-sectional view showing a conventional automotive air conditioner.

FIG. 10 is a cross-sectional view showing another example of a conventional air conditioner for a vehicle.

[Explanation of symbols]

 3 evaporator, 4 heater core, 5 mixed door, 10 upstream air path, 11 downstream air path, 12 door body, 17 tooth section, 18 guide roller, 19 groove cam, 20 gear , 20a: high teeth, 23: drive unit, 24: support roller, 25: support wall, B: bypass passage, C: case, C1, C2: casing piece, D: door, K: regulating member, M: slide mechanism .

Claims (6)

[Claims] 1. An air flow flowing down from an upstream air passage (10),
A door (D) of a predetermined size arranged to selectively flow into the two branched downstream air paths (11) or to flow air at a predetermined ratio to each downstream air path (11). Have the door
In a vehicle air conditioner in which a regulating member (K) for regulating the door operation is provided on the upstream side and the downstream side of (D), respectively, in the vicinity of the door (D), An air conditioner for an automobile, wherein the air conditioner extends in a direction in which the airflow blown out from the path (10) is blocked and has a circular arc shape so as to swell to a downstream side in a flow direction of the air with a predetermined radius of curvature. Door mechanism. 2. The door mechanism according to claim 1, wherein the door (D) slides up and down in a direction of gravity. 3. The door (D) is formed in a case (C) forming the air passages (10, 11) in an arc shape so as to bulge to a downstream side in a flow direction of air with a predetermined radius of curvature. Groove Cam (19)
And a tooth portion (17) formed on the door body (12), and the tooth portion (1
A guide member provided on the door body (12), which is connected to a slide mechanism (M) comprising a gear (20) meshed with 7) and a drive section (23) for rotating the gear (20). (18) is the groove cam (1
The door mechanism of an air conditioner for a vehicle according to claim 1 or 2, wherein the door mechanism moves along (9). 4. The door body (12) has a shape in which an outer peripheral portion is flat and an inner portion is bulged, and the seal member (15) is attached to the flat outer peripheral portion. The door mechanism of the air conditioner for a vehicle according to claim 3, wherein the door mechanism is provided. 5. The air passage (10, 11) is formed in a case (C) of the air conditioner for an automobile, in which two casing pieces (C1, C2) are interposed at the center, and the door (10, 11) is provided. The door body (12) provided at the center in the width direction of the body (12)
The air conditioner according to any one of claims 1 to 4, wherein the support roller (24) elastically abutting against the support is supported when the two casing pieces (C1, C2) are combined. Door mechanism. 6. The evaporator (3), wherein the door body (12) is an evaporator (3).
A heater core (4) is provided at a small gap downstream of the evaporator (3) in an air passage (10) through which the airflow blown from the air flows, and the evaporator (3) passes through the air passage (10).
The entire amount of the air flow blown to the heater core (4) side or the bypass passage for bypassing the heater core (4)
A mixing door (5) that is caused to flow to the (B) side or to both sides at a predetermined ratio, wherein the support wall (2) of the heater core (4) located at the center of the door body (12) in the sliding direction is provided.
The door mechanism for an air conditioner for a vehicle according to claim 5, wherein the support roller (24) is supported by (5).