JPH10250347A - Door mechanism of air conditioner for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stabilize mixing of cold wind and hot wind so as to improve temperature conditioning characteristic by forming one of mode doors into a slide door along an inside wall or along an extended line of the inside wall, and making the other not to enter into the range of a mixing chamber partitionedly formed with the slide door and the inside wall. SOLUTION: A first mode door Dm1 is constituted so that it slides along the curved face of an inside wall 30 partitionedly forming a mixing chamber 1. Hot wind heated by passing through a heater core 4 moves along the curved face of the inside wall 30 and the first mode door Dm1 . A second mode door Dm2 is constituted so that it rotationally moves so as not to enter into the range of the mixing chamber 1 partitionedly formed with the first mode door Dm1 and the inside wall 30. Hereby, even when the second mode door Dm2 is operated into a vent mode or a foot mode state, the flow of cold wind or hot wind is not disturbed by the second mode door Dm2 , they are stably mixed, and temperature conditioning characteristic is also improved without increasing ventilation resistance.

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 an automobile having excellent temperature control characteristics capable of stably mixing cold air and hot air and reducing ventilation resistance.

[0002]

2. Description of the Related Art Generally, as shown in FIG. 9, a heater unit of an air conditioner for an automobile has an evaporator 3 for cooling introduced air and a heater core 4 provided on the downstream side of the evaporator 3 in a case C. Between the evaporator 3 and the heater core 4 to selectively flow cold air from the evaporator 3 to the heater core 4 side or to the bypass passage B side for bypassing the heater core 4, or to connect the heater core 4 side to the bypass passage. A mixing door 5 branching and flowing at a predetermined ratio into both passages on the B side, a mixing chamber 1 in which the cold air and the hot air are mixed, a differential air outlet 6a, a vent air outlet 7a, and a differential air outlet 6a opened in the case C; The foot outlet 8a, the differential door 6, the vent door 7, and the foot door 8 for controlling the opening and closing of each of the outlets 6a, 7a, 8a (hereinafter, these doors are The differential air outlet 6a and the vent air outlet 7a communicate with a differential duct 6d and a vent duct 7d for guiding cold air, hot air or temperature-controlled air to a predetermined area in the vehicle compartment. ing.

[0003] Here, as is well known, the "evaporator 3" has a low-temperature and low-pressure refrigerant decompressed by an expansion valve or the like in a cooling cycle flowing through the inside of the evaporator 3, and the air introduced here is converted into heat by the refrigerant. It is cooled by exchange to produce cool air. Further, the “heater core 4” has a structure in which high-temperature engine cooling water circulates, and heats the air introduced therein by heat exchange with high-temperature engine cooling water to generate hot air.

[0004]

In the unit constructed as described above, a differential air outlet 6a, a vent air outlet 7a and a foot air outlet 8a are arranged around the mixing chamber 1, and each of these air outlets has a mode door. Since one of these mode doors Dm is operated, the door enters the mixing chamber 1 because Dm is disposed. If these mode doors Dm are rotated outward from the mixing chamber 1, the unit itself becomes undesirably enlarged.

Therefore, each time one of the mode doors Dm is operated, the direction of the air flow flowing through the mixing chamber 1 is disturbed, and the stability of mixing the cool air and the hot air is improved. And the mode door Dm itself increases the ventilation resistance and causes noise.

For example, in the vent mode, a part of cold air cooled by the evaporator 3 is branched by the mix door 5 to the bypass passage B side and the rest is branched to the heater core 4 side. After being mixed, the temperature is adjusted to a predetermined temperature and the air is distributed from the vent port 7a.

However, when the differential door 6 opens the differential air outlet 6a, the differential door 6 enters the mixing chamber 1, and the flow of the cool air flowing through the bypass passage B is disturbed by the differential door 6, and the mixing is stopped. Since the area of the room 1 changes, the cold air and the hot air do not mix stably, and stable temperature control becomes difficult. For this reason, conventionally, a fixed temperature control rib is erected in the mixing chamber 1 to ensure the stability of the temperature control.

However, when the temperature control ribs are erected in this manner, it is difficult to select the size of the temperature control ribs and to set the erected position, and the number of the temperature control ribs increases. In addition, the assembly workability becomes troublesome, and the cost is disadvantageous. When a temperature control rib is erected in the mixing chamber 1,
Due to the temperature control ribs, the ventilation resistance also increases, and there is a possibility that a desired air flow rate cannot be obtained. Furthermore, for example, even if the temperature control rib is determined to be the best position and size as the vent mode, other modes (vent door 7
Is closed and the other door is open), the temperature control ribs may adversely affect the temperature control state in other modes.

Although the above-described example is for the differential mode, the above-mentioned problem also occurs in the vent mode and the foot mode to a different extent.

[0010] The present invention has been made to solve the above-mentioned problems of the prior art.
An air conditioner door for a vehicle air conditioner that is stable in any mode, has excellent temperature control characteristics that can reduce airflow resistance, is compact, has a reduced operating force, has a simplified configuration, and is cost effective. The purpose is to provide a mechanism.

[0011]

According to a first aspect of the present invention, there is provided a door mechanism for an air conditioner for a vehicle, comprising: an evaporator for cooling an introduced air; A heater air provided between the heater core provided downstream of the evaporator and the evaporator heater core, and selectively flowing cool air from the evaporator to the heater core or a bypass passage that bypasses the heater core. Door that branches and flows at a predetermined ratio into both passages on the side of the air passage and the bypass passage, a mixing chamber in which the cold air and the hot air are mixed, and a plurality of blow openings formed on an inner wall defining the mixing chamber. In an automotive air conditioner having an outlet and a plurality of mode doors for controlling opening and closing of the air outlet, at least one of the mode doors includes: The sliding door is slid by the sliding mechanism along the inner wall or an extension of the inner wall, and other mode doors do not enter the range of the mixing chamber defined by the sliding door and the inner wall. It operates so that it is characterized by the above-mentioned.

In this case, if one mode door is a sliding door, the space for switching the air distribution by operating the sliding door may be an extremely small space.
This makes it possible to reduce the size of the case.
In addition, since no other mode door enters the range of the mixing chamber defined by the sliding door and the inner wall,
Mixing of cold air and hot air is performed stably, and mixability is improved. As a result, since it is not necessary to provide the temperature control ribs in the mixing chamber, the ventilation resistance does not increase and the temperature control characteristics are improved. In addition, since the mixing area of the mixing chamber does not change and the angle at which the cool air and the hot air collide is almost constant in any mode, stable mixability and temperature control can be obtained in this respect as well. Further, since the temperature control rib is not required and the door operating mechanism is simplified, the cost is extremely advantageous.

According to a second aspect of the present invention, the inner wall or an extension of the inner wall is formed to have an arc-shaped cross section.

According to this structure, the air flow flowing along the inner wall having a curved surface having an arcuate cross section becomes extremely smooth, so that not only the flow noise does not occur but also the ventilation resistance does not increase, Temperature control characteristics are also improved. In particular, when the mode is controlled by operating the slide door, an airflow flows along the slide door, and the slide door itself functions as a kind of guide wall, so that the temperature control can be performed more smoothly. It will be.

According to the third aspect of the present invention, the slide mechanism meshes a gear with a tooth formed on a door body of the mode door, connects the gear with a driving unit, and
A groove cam into which a guide member of the door main body is inserted is formed, and the groove cam is formed so as to slide the door main body along a curved surface of an inner wall defining the mixing chamber. I do.

With this arrangement, since the slide mechanism is driven by gears, the operation is smooth, the operability of the door is improved, and the door can be comfortably controlled without generating abnormal noise. Operates along the groove cam, so that the door body operates without rattling even when subjected to wind pressure.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing an automotive air conditioner according to an embodiment of the present invention, FIG. 2 is a schematic perspective view showing a door partially cut away, and FIG. 3 is a horizontal cross-sectional view showing a door sliding mechanism. 4 is an end view along the line 4-4 in FIG. 3, FIG. 5 is an explanatory view showing an enlarged main part of the door, FIG. 6 is an explanatory view showing the groove cam portion, and FIG. 7 is a line 7-7 in FIG. FIG. 8 is a cross-sectional view showing a supporting roller portion, and FIG. 8 is a perspective view showing another embodiment of the present invention. Components common to those shown in FIG. 9 are denoted by the same reference numerals.

As shown in FIG. 1, the air conditioner for a vehicle according to the present embodiment integrates a cooler unit 1 and a heater unit 2 side by side in the front-rear direction of the vehicle to reduce the length L of the vehicle in the front-rear direction. Unit case C.

In the unit case C, an evaporator 3 for cooling the introduced air to produce cold air, a heater core 4 for heating the cold air to produce hot air, and a predetermined temperature by mixing cold air and hot air. A mixing chamber 1, a foot duct 8 d defined by the mixing chamber 1 and an inner wall 30 having an arc-shaped cross section, a differential air outlet 6 a and a vent-foot air outlet formed on an extension of the inner wall 30. 10a, and a door mechanism for controlling the cold / hot air are provided.

The door mechanism comprises a sliding mix door 5 provided between the evaporator 3 and the heater core 4, a differential air outlet 6a and a vent-foot air outlet 10a.
A first mode door Dm1 that opens and closes, and a second mode door D that opens and closes a vent outlet 7a and a foot outlet 8a provided at an upper end portion of a foot duct 8d.
m2.

The mix door 5 selectively allows the cool air from the evaporator 3 to flow to the heater core 4 side or to the bypass passage B side for bypassing the heater core 4 or a predetermined flow to both the heater core 4 side and the bypass passage B side. And flows at a ratio of 2 to control the temperature of the blown air.

The first mode door Dm1 selectively opens and closes only one of the differential air outlet 6a and the vent-foot air outlet 10a according to the mode, and the two air outlets 6a, 10
This is to create a state where a is opened and closed at a predetermined ratio.

In other words, a differential mode in which the differential air outlet 6a is opened by moving the first mode door Dm1 (a mode in which warm air is blown to the front and side glass to clear the fog).
A vent mode in which the vent-foot outlet 10a is opened in cooperation with the second mode door Dm2 (a mode in which cool air flows from the vent duct 7d toward the upper body of an occupant in the vehicle compartment) and a bi-level mode ( To create a cold head heat mode in which cold air flows toward the upper body of the occupant in the passenger compartment and warm air flows toward the feet of the occupant, and a foot mode (mode in which hot air flows toward the feet of the occupant in the passenger compartment). Is available.

The rotary second mode door Dm2 rotates about a rotation shaft 11, and the vent-foot outlet 10
When "a" is opened, the air flow (normally hot air or temperature-controlled air) is selected and distributed. The mode selected by the second mode door Dm2 is a vent mode for guiding the air flow to the vent duct 7d,
There are a foot mode in which the foot is guided to the foot duct 8d to heat the feet of the occupant and a bi-level mode in which the foot is passed through both.

Further, the first mode door Dm1 is moved to the middle, the differential air outlet 6a and the vent-foot air outlet 10a are opened, and the second mode door Dm2 is set to the position where the foot duct 8d is opened, so that the differential duct 6d can be opened. By simultaneously flowing a predetermined ratio through the foot duct 8d, a differential foot mode in which the feet are heated while clearing the fogging of the window is obtained.

In particular, in the present embodiment, the second mode door Dm2 is configured to rotate so as not to enter the range of the mixing chamber 1 defined by the first mode door Dm1 and the inner wall 30. ing. In this way, even when the second mode door Dm2 operates and the vent mode or the foot mode state is created, the flow of the cool air or the hot air is not disturbed by the second mode door Dm2, and the cool air and the hot air are not disturbed. The wind flows stably, and the cool air and the warm air are stably mixed, and the mixability is improved. As a result, there is no need to provide a temperature control rib in the mixing chamber as in the related art, so that the ventilation resistance does not increase and the temperature control characteristics are improved. Also, since the temperature control rib is not required and the door operation mechanism is simplified,
This is extremely advantageous in terms of cost.

As described above, in the present embodiment, the mix door 5, the first mode door Dm1, and the second mode door Dm2 allow a plurality of modes such as a vent mode, a bi-level mode, a defrost mode, a foot mode, and a differential-foot mode. Even in the foot mode in which the path through which the air flow flows in the unit case C is the longest, the air flow can smoothly flow from the differential foot outlet 10a without fear of increasing the ventilation resistance. Foot duct 8d
Even if the rotary second mode door Dm2 is provided at a position very close to the sliding first mode door Dm1, there is no danger that both doors will interfere with each other, so that a small space is required. The door operation at the door will be performed smoothly.

Further, the first mode door Dm1 is
Is formed so as to slide along the curved surface of the inner wall 30 that defines the first mode door after the warm air heated through the heater core 4 flows along the curved surface of the inner wall 30. Since the vehicle moves along Dm1, not only no flow noise occurs but also the ventilation resistance does not increase, and the flow becomes extremely smooth. The cool air that bypasses the heater core 4 and the hot air that has passed through the heater core 4 always collide at the same angle, so that the mixability is stabilized.

Next, the door and the slide mechanism M will be described. Since the mix door 5, the first mode door Dm1, and the slide mechanism M have substantially the same configuration, both will be described together.

The mix door 5 and the first mode door Dm1 are
Although the door body 12 is provided, the size of the door body 12 is about half of the opening O that each door 5, Dm1 opens and closes.

Here, in the case of the mixed door 5, the opening O is formed between the upper contact wall Sa and the central upper contact wall Sb formed on the downstream side of the evaporator 3. It is an opening formed between the upper opening, the center lower contact wall Sc, and the lower contact wall Sd. In the case of the first mode door Dm1, the differential outlet 6a and the vent-foot outlet are provided. 10a, which is a contact wall Se formed at the end of the inner wall 30 and an opening formed between the middle contact wall Sf and the terminal contact wall Sg.

As shown in FIG. 2, the door body 12
The outer peripheral surface of the flat portion 12a has a flat portion 12a and a dome-shaped bulging portion 12b, and a seal member 15 made of urethane foam or the like is attached to the outer surface of the flat portion 12a. However, the seal member 15 may be provided not only on the back side of the bulging portion 12b but also on the abdominal side.

Further, a pair of reinforcing plates 16 having a function of reinforcing the door body 12 and guiding the air flow are provided at a side end portion of the door body 12. The cross section between the reinforcing plate 16 and the side end of the door body 12 has an arc shape,
Here, the partial gear 20 in the drive unit 23 described in detail later
Are formed continuously.

At four upper and lower side ends of the door body 12, there are projected guide rollers 18 rotatably inserted into guide groove cams 19 projecting from an inner side wall of a case C described later in detail. I have. The guide roller 18 may be a cylindrical pin that does not roll in some cases.

The door body 12 is formed in an arc shape so as to be in contact with the gear 20 on which the drive unit 23 rotates. As shown in the figure, this arc shape is only "concave" in the direction of air flow. Instead, it may be “convex”. For example, if it is “convex”, the air flow distribution characteristics are improved, and the guide characteristics for guiding to the heater core 4 and the bypass passage B are also improved, and the air resistance is reduced. It serves as a guide when leading to the heater core 4 or leading to the bypass passage B, and exhibits a guiding function without airflow resistance, so that the guiding characteristics are further improved.

Next, as shown in FIG. 3, a slide mechanism M for operating the doors 5 and Dm1 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. Pair of partial gears 20 meshed with the toothed portion 17
, A shaft 21 for connecting the partial gears 20 to each other, a drive gear 22 fixed to an end of the shaft 21, and a drive unit 23 such as a motor or a motor actuator for driving the drive gear 22 (see FIG. 1). ).

In this way, when the mode door Dm is operated to switch the air distribution, it can be performed in an extremely small space, not only can the case C be made compact, but also the slide mechanism M However, since the gear is driven, the operation is smooth, the operability of the door is improved, and comfortable door control without generating abnormal noise is possible.

The driving section 23 may be a manual operation mechanism connected to the controller via a wire cable in some cases.

As shown in FIG. 6, the groove cam 19 has a curvature radius r substantially equal to the curvature radius of the doors 5, Dm1.
And supports the four guide rollers 18 of the door main body 12 so that the door main body 12 operates without rattling even if it receives wind pressure. The groove cam 19 is formed in a pair of upper and lower parts formed in an arc shape on each inner wall of the case C. The upper guide roller 18 is provided in the upper groove cam 19, and the lower guide roller 18 is provided in the lower groove cam 19.
Are inserted into the end portions 1 of the groove cams 19, respectively.
9a is formed so that the door body 12 moves obliquely rearward from a direction intersecting the direction of the slide at the end position of the slide, that is, a predetermined arc-shaped slide direction in the illustrated embodiment.

As a result, the sealing member 15 comes into contact with the wall portions Sa to Sd or Se to Sg, and is pressed,
The sealability is improved. That is, the sealing member 15 does not always contact the wall portion Sa or the like, but only comes into contact when necessary, so that the sealing property is prevented from lowering for a long time, and the sealing property is improved. Also, there is no friction when operating the door, and the operating force is reduced.

Although the groove cams 19 of this embodiment are separately formed in pairs, the present invention is not limited to this, and the guide roller 18 intersects the sliding direction at the end position. The end portions 19a of the pair of grooved cams 19 may have any shape as long as they move in the direction. In this case, the moldability is improved when the case C is formed from a synthetic resin.

The slide mechanism M is provided with the groove cam 1.
9, a pair of partial gears 20, a shaft 21, and a drive gear 22. These are unitized with the mix door 5 or the first mode door Dm1, and the unit is a case C
May be inserted and attached through an opening formed in the side wall of the horn. In such a case, various types of units can be formed for each model, and the air conditioner for a vehicle can be assembled while sharing a main part.

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. 4 and 5, the upper and lower end portions or the tooth portions in the vicinity thereof are high teeth 17a whose tooth height is higher than the other teeth 17b. That is, as shown in FIG. 5, the tip of the high tooth 17a at the end of the tooth portion 17 has a radius 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 main body 12 is rotated by the pair of partial gears 20. For example, when the door main body 12 is relatively long in the width direction as in the case of the mixed door 5, the wind pressure is increased in the width direction. May be deformed.

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 body 12, so that 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 comprises a drum-shaped portion 24a and a pair of elastic support arms 24b projecting in the axial direction from the drum-shaped portion 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.

Next, the operation of the embodiment will be described. << Vent Mode >> The vent mode is a mode for cooling the vehicle interior. In this vent mode, in the case of a full cool mode in which the entire amount of cold air is blown into the vehicle compartment without being heated,
The position of the mix door 5 is set at the lowermost end in the vertical direction in the figure, and when the temperature is set at an intermediate temperature, the mix door 5 is set at the middle in the vertical direction.

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 of the mixed door 5 becomes
Is lowered along the groove cam 19.

In the case of the full cool mode, the door body 1
2 descends and reaches the end position, where the high tooth portion 20a of the partial gear 20 is
7a, the door main 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 brought into contact with the contact wall portions Sc, Sd formed on the side wall of the case C. Abut and pressurized.

As a result, the sealing performance of the door body 12 is improved, and the air heated by the heater core does not flow. Therefore, a cock for preventing the flow of warm water to the heater core at the time of full cooling can be eliminated. Further, since no air leakage occurs, 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.

When the first mode door Dm1 is located at the left end in the state of FIG. 1, the air flow cooled by the evaporator 3 flows along the curved surface of the mix door 5 and then passes through the mixing chamber 1. Then, it passes through the vent-foot outlet 10a almost straight, flows into the vent outlet 7a, and is distributed toward the vehicle interior through the vent duct 7d. In this case, since the ventilation resistance is low, a large amount of cold air can be blown into the vehicle interior.

In the case of the full cool mode, the occupant sometimes desires a large amount of cold air. In this case,
A large amount of cold air may collide with the door main body 12, and the door main body 12, which is relatively long in the width direction, may be deformed rearward.

However, in this embodiment, the door body 12
Is elastically supported by the support roller 24 at the center in the width direction, so that the door body 12 is prevented from being deformed even when a large wind pressure is applied to the door body 12, and even if a gear-type slide mechanism is used, There is no abnormality such as a jump operation and the like, it operates smoothly, and there is no decrease in the temperature control characteristics 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 operation of the door main body 12 in the vertical arc is extremely smooth not only in the full cool mode but also in any mode state. Become.

In order to set an intermediate temperature state, the position of the mix door 5 is set at an intermediate position in the vertical direction. Also in this case, the drive unit 23 is operated by the controller, and the guide roller 18 of the door main body 12 moves along the groove cam 19 by the rotation of the partial gear 20, so that the guide roller 18 is in the middle position in the vertical direction.
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 performed smoothly.

Further, 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 shifts, the backlash between the partial gear 20 and the tooth portion 17 on the side of the door body 12 is about the backlash, so that the door position can be set very accurately.

In this state, a part of the air flow cooled by the evaporator 3 reaches the mixing chamber 1 from the bypass passage B through the space between the upper end of the mixing door 5 and the upper contact wall Sa, and the remainder. Is heated by the heater core 4 between the lower end of the mix door 5 and the lower contact wall Sd, and flows along the curved surface of the inner wall 30.
The mixing chamber 1 is reached. In the mixing chamber 1, the cool air and the hot air are mixed to form an airflow at a predetermined temperature, thereby forming a vent outlet 7.
From a, the vehicle heads toward the vehicle interior via the vent duct 7d.

In particular, the second mode door Dm2 does not exist in the range of the mixing chamber 1, and the mode door does not enter inside and rotate as in the conventional air conditioner for automobiles. The air flowing through the passage B flows smoothly without being disturbed by the door,
Mixing with warm air is performed smoothly, and the temperature control characteristics are improved.

Moreover, the inner wall 3 defining the mixing chamber 1 is formed.
0 is a curved surface, and the first mode door Dm1 is configured to slide along the curved surface, so that the warm air heated through the heater core 4 flows along the curved surface of the inner wall 30. Later, since it moves along the first mode door Dm1 and flows, not only the flow noise does not occur, but also the ventilation resistance does not increase, and the flow becomes extremely smooth. It will be done smoothly.

<< Foot Mode >> The foot mode is a mode for heating the vehicle interior. In the case of the full hot mode in which all the cool air from the evaporator 3 is heated by the heater core 4 and blown into the vehicle interior, the driving unit 23 is operated by a signal from a controller (not shown) to move the position of the mix door 5 in the vertical direction in the figure. If the temperature is set at the uppermost end and the temperature is set at an intermediate temperature, the position of the mix door 5 is set at an intermediate position in the vertical direction.

In the case of the full hot mode, the door body 1
2 rises and reaches the end position, as in the case described above, the sealing performance of the door body 12 is improved, the temperature control characteristics are excellent, and the door movement is smoothly controlled. When the first mode door Dm1 is located at the left end in FIG. 1, the hot air heated by the heater core 4 flows along the curved surface of the inner wall 30 and immediately flows into the vent-foot outlet 10a. Here, the second mode door Dm2 is used to open the differential outlet 6a.
Is closed, the warm air flows into the foot duct 8d and is distributed toward the feet of the occupant. In the case of the foot mode, the air flow smoothly enters the foot duct 8d from the vent-foot outlet 10a, and there is no fear that the ventilation resistance increases.

<< Bi-level mode >> In this mode, cold air is distributed from the vent outlet 7a to the upper body of the occupant through the vent duct 7d, and warm air is supplied from the vent-foot outlet 10a to the foot duct. In this mode, the wind is distributed toward the feet of the occupant in the vehicle cabin through 8d.

Therefore, the mix door 5 is set at the middle in the vertical direction, the first mode door Dm1 is set so as to close the differential air outlet 6a, and the second mode door Dm2 is set.
Is set at an intermediate position that opens both the vent outlet 7a and the foot outlet 8a.

In this state, a part of the air flow cooled by the evaporator 3 passes through the space between the upper end of the mixing door 5 and the upper contact wall Sa, reaches the mixing chamber 1 from the bypass passage B, and remains there. Is heated by the heater core 4 between the lower end of the mix door 5 and the lower contact wall Sd, and flows along the curved surface of the inner wall 30.
The mixing chamber 1 is reached.

However, since the cool air has the vent outlet 7a opened, it enters the vent duct 7d straight from the bypass passage, and the warm air has the vent-foot outlet 10a opened. Is controlled by the second mode door Dm2 to enter the foot duct 8d. As a result,
Cold air and hot air are not mixed, and the vent duct 7
d or the foot duct 8d, the cool air is distributed to the upper body of the occupant, and the warm air is distributed to the feet of the occupant.

<< Defrost Mode >> The defrost mode is a mode for clearing fogging of a windshield or the like. In other words, the mix door 5 is raised to the upper end when blowing out the high-temperature wind, and the mix door 5 is set to the middle position when blowing out the intermediate-temperature warm air. Then, the first mode door Dm1 is positioned at the right end in FIG. 1, and the warm air from the heater core 4 flows into the differential air outlet 6a.

In the defrost mode, the first mode door D
Since the vent-foot outlet 10a is closed from m1, the hot air flows to the differential duct 6d and is distributed to the windshield and the like. The air warmed by passing through the heater core 4 rises along the inner wall and further flows along the second slide door Dm2, so that the air smoothly flows into the differential outlet 6a. Since the ventilation resistance is also reduced, a large amount of air can be blown toward the windshield. Therefore, fogging of the window can be effectively prevented.

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. The first mode door Dm1
Is an arc shape, but may be a straight shape depending on the case. The mounting position is not limited to the extension line of the arcuate inner wall 30 in cross section. You may make it attach to the inner wall 30 itself.

The shapes of the partial gears and the teeth on the door side can be appropriately changed in relation to the door. In particular, the high tooth portion is not limited to the illustrated embodiment, but may be used in various shapes, and the partial gear may be a complete gear in some cases.

The mix door 5 and the first mode door Dm1 of the embodiment described above are rotated by a pair of partial gears 20. As shown in FIG. One part may be provided with one gear 20 and actuated thereby. In this case, the number of parts is reduced, and the assembling becomes easy, which is advantageous in terms of cost. In addition, since the door body 12 is clamped in cooperation with the support roller 24, the door itself is slightly deformed. However, there is no adverse effect on the temperature control characteristics.

In the above embodiment, the support roller 2
4 is attached only to the mix door 5,
It may be attached to the first mode door Dm1.

[0073]

As described above, according to the first aspect of the present invention, since the mode door is a slide door, the air distribution can be switched in a small space, and the unit can be made compact. In addition, since the mode door does not enter the range of the mixing chamber defined by the sliding door and the inner wall, the mixing property is improved without increasing the ventilation resistance, and even if the temperature control rib is not erected, Temperature control characteristics are also improved. In addition, since the mixing area of the mixing chamber does not change and the angle at which the cool air and the hot air collide is almost constant in any mode, stable mixability and temperature control can be obtained in this respect as well. Further, since the door operating mechanism is simplified, the cost is extremely advantageous.

According to the second aspect of the present invention, since the air flow flowing along the curved surface of the inner wall becomes extremely smooth, not only the flow noise does not occur but also the ventilation resistance does not increase, and the temperature control characteristics are not increased. Also improve. In particular, when the first mode door is operated to perform the mode control, the door itself functions as a kind of guide wall, so that the temperature control is further smoothly performed.

According to the third aspect of the present invention, since the sliding mechanism is driven by a gear, the operation is smooth, the door operability is improved, and comfortable door control without generating abnormal noise can be performed. Operates along the groove cam, so that the door body operates without rattling even when subjected to wind pressure.

[Brief description of the drawings]

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

FIG. 2 is a schematic perspective view showing a door partially broken away.

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

FIG. 4 is an end view taken along line 4-4 in FIG. 3;

FIG. 5 is an explanatory diagram showing a door main part in an enlarged manner.

FIG. 6 is an explanatory view showing a groove cam portion.

FIG. 7 is a sectional view showing a support roller.

FIG. 8 is a schematic perspective view showing another embodiment of the door according to the present invention.

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Mixing chamber, 3 ... Evaporator, 4 ... Heater core, 5 ... Mix door, 6a, 7a, 8a ... Outlet, 6d, 7d, 8d ... Duct, 12 ... Door main body, 17 ... Tooth part, 18 ... Guide roller, 19: groove cam, 20: gear, 23: drive unit, 30: inner wall, B: bypass passage, C: case, Dm: mode door, Dm1: first mode door, Dm2: second mode door, M: slide mechanism.

Claims (3)

[Claims] An evaporator (3) for cooling the introduced air, a heater core (4) provided downstream of the evaporator (3), a case (C), and the evaporator (3) and the heater core (4). ), And cool air from the evaporator (3) is supplied to the heater core (4) side or the heater core (4).
Mix door (5) that selectively flows into the bypass passage (B) side that bypasses the air, or branches and flows at a predetermined ratio into both the heater core (4) side and the bypass passage (B) side.
A mixing chamber (1) in which the cold air and the hot air are mixed, and a plurality of outlets (6a, 7a, 8a) opened in an inner wall (30) that defines the mixing chamber (1), In a vehicle air conditioner having a plurality of mode doors (Dm) for controlling the opening and closing of the outlets (6a, 7a, 8a), at least one of the mode doors (Dm) includes the inner wall.
(30) or a sliding door that slides along the extension of the inner wall (30) by the sliding mechanism (M), and the other mode doors (Dm) are the sliding door and the inner wall (30).
A door mechanism of an air conditioner for an automobile, characterized in that the door mechanism is configured to operate so as not to enter the range of the mixing chamber (1) defined by the partition. 2. The inner wall (30) or the inner wall (30)
2. The door mechanism of an air conditioner for a vehicle according to claim 1, wherein an extension of the first member is configured to have an arc-shaped cross section. 3. The sliding mechanism (M) includes a gear (20) on a tooth (17) formed on a door body (12) of the mode door (Dm).
And the gear (20) is connected to the drive section (23), and the case (C) is formed with a groove cam (19) into which the guide member (18) of the door body (12) is inserted. The groove cam (19) has an inner side wall (30) for partitioning the door body (12) into the mixing chamber (1).
The door mechanism of an air conditioner for a vehicle according to any one of claims 1 to 3, wherein the door mechanism is formed so as to slide along a curved surface of the door.