JPH08282247A - Air conditioner for automobile - Google Patents

Abstract

PURPOSE: To surely set the maximum cooling capacity and the maximum heating capacity without having effects of size irregularity in a link mechanism in an air conditioner for an automobile in which a blow quantity rate is adjusted by a sliding door to adjust blown air temperature. CONSTITUTION: A sliding door 12 is provided in such a direction as to cross a cooling air passage 6 and a heater core 5 provided in the downstream of air of an evaporator to be capable of sliding. In a link mechanism 14 to drive the sliding door 12, a pin at a tip part of a second lever member 35 which is rotated by a temperature adjusting lever 41 is engaged with a U-letter shaped engagement groove 23a of a first lever member 23, and in the maximum cooling side/maximum heating side ranges of the temperature adjusting lever 41, motion quantity of the first lever member 23 on the sliding door 12 side is set to be almost zero to motion quantity of the second lever member 35 of the link mechanism 14. In the maximum cooling side/maximum heating side ranges, therefore, motion quantity of the sliding door 12 becomes almost zero, thereby blown air temperature can be kept to be almost constant.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air conditioner for adjusting the air flow rate to the heater and the cold air passage by means of a sliding door that slides in a direction traversing the air passage to the heater and the cold air passage. .

[0002]

2. Description of the Related Art Conventionally, an air conditioner for a vehicle having a sliding door of this type has been proposed in Japanese Utility Model Laid-Open No. 6-71222 and Japanese Patent Laid-Open No. 172014/1989. In these conventional devices, a plurality of sliding doors are used to adjust the air flow rate to the air passage to the heater and the cold air passage provided in parallel with the air passage.

[0003]

Therefore, there is a problem that the structure of the link mechanism for driving a plurality of slide type doors is inevitably complicated. Therefore, the inventors of the present invention have devised, prototyped, and examined a device having a simple configuration that adjusts the air flow rate to the air passage to the heater and the air flow passage to the cold air passage by using one slide door. saw.

[0004] In the device made by trial and examination by the present inventors, the moving amount (opening) of the sliding door changes in a one-to-one correspondence with the moving amount of the link mechanism for driving the sliding door. Therefore, the relationship between the movement amount of the link mechanism and the temperature of blown air adjusted by the sliding door has a linear characteristic as shown by the broken line in FIG. As a result, even in the areas on the maximum cooling side and the maximum heating side, the blown air temperature changes immediately even if the link mechanism slightly moves. Therefore, even if the sliding door is set at both ends of its moving range, if the sliding door does not reach the maximum cooling position and the maximum heating position due to the dimensional variation of the link mechanism, the maximum cooling capacity and the maximum heating capacity can be obtained. Cannot be set.

The present invention has been made in view of the above points,
In an automotive air conditioner that uses a single sliding door to adjust the air flow rate to the heater and the air flow rate to the cool air path, the maximum cooling capacity and maximum heating capacity can be achieved regardless of the dimensional variation of the link mechanism. The purpose is to be able to set reliably.

[0006]

In order to achieve the above object, the present invention employs the following technical means. In the invention according to claim 1, a heater (5) for heating the blown air and a cold air passage (5) that is provided in parallel with the heater (5) and bypasses the heater (5) to flow the blown air ( 6), the air passing through the cold air passage (6) and the hot air heated by passing through the heater (5) to mix the hot and cold air (1).
3) and an air passage (15, 16, 17, 1) provided on the air downstream side of the cold / hot air mixing space (13) to guide the air from the cold / hot air mixing space (13) to the vehicle interior outlet.
8) and an air upstream side of the heater (5) and the cold air passage (6) in a direction traversing the air passage (7) to the heater (5) and the cold air passage (6). A slide type door (12) that is provided so as to adjust the air flow rate to the heater (5) and the cold air passage (6), and is connected to the slide type door (12). ) To slide in the transverse direction (1)
4) and the link mechanism (14) includes a first lever piece (2) provided on the sliding door (12).
3), a drive shaft (37) provided so as to be rotated by a temperature adjusting mechanism (41), and a second lever piece (35) connected to the drive shaft (37), In the regions on the maximum cooling side and the maximum heating side of the temperature adjustment mechanism (41), the movement amount of the first lever piece (23) becomes substantially zero with respect to the movement amount of the second lever piece (35). Thus, the vehicle air conditioner is characterized in that the second lever piece (35) and the first lever piece (23) are engaged.

According to the second aspect of the invention, the cooler (4) for cooling the blown air and the cool air cooled by the cooler (4) are provided on the air downstream side of the cooler (4). And a cool air passage (6) that is provided in parallel with the heater (5) on the air downstream side of the cooler (4) and that bypasses the heater (5) and allows the cool air to flow. And a cold / warm air mixing space (13) for mixing the cold air and the warm air heated by passing through the heater (5), and provided on the air downstream side of the cold / warm air mixing space (13), Between the blower air passage (15, 16, 17, 18) for guiding the air from the cold-warm air mixing space (13) to the vehicle interior outlet, and between the cooler (4) and the heater (5), The air passage to the heater (5) and the cool air passage (6) are slidably provided in a direction transverse to the front, Heater (5) and said cool air passage (6)
And a link mechanism (14) connected to the sliding door (12) for sliding the sliding door (12) in the transverse direction. The link mechanism (14) is provided with a first lever piece (23) provided on the sliding door (12) and a drive shaft (37) provided so as to be rotated by a temperature adjusting mechanism (41). And a second lever piece (35) coupled to the drive shaft (37), and in the regions of the maximum cooling side and the maximum heating side of the temperature adjusting mechanism (41), the second lever piece is provided. The second lever piece (35) and the first lever piece (23) are arranged so that the movement amount of the first lever piece (23) becomes substantially zero with respect to the movement amount of (35). Features engaged automotive air conditioners.

According to a third aspect of the invention, in the automobile air conditioner according to the first or second aspect, the sliding door (12) includes a support member (21) having openings (24a to 24d), and A flexible film member (22) is provided on the air downstream side of the support member (21) so as to be movable integrally with the support member (21), and the support member (21) is moved in the transverse direction. And a guide mechanism (32, 33) for guiding the movement of the support member (21), and the film member (22) includes the support member (2).
1) By the wind pressure of the air received through the openings (24a to 24d), the air passage opening (9) to the heater (5) and the peripheral portion (38) of the opening (8) to the cold air passage (6). ) Is configured so that it can be pressed against.

According to a fourth aspect of the present invention, in the vehicle air conditioner according to any one of the first to third aspects,
In the regions of the maximum cooling side and the maximum heating side of the temperature adjusting mechanism (41), the first lever piece (23) is bent relative to the second lever piece (35), The first and second lever pieces (23, 35) are engaged by pin-groove loose fitting, and in the intermediate temperature control region of the temperature adjusting mechanism, the second lever piece (35) is provided with The first and second lever pieces (23, 23) are arranged so that the first lever piece (23) extends in a substantially linear positional relationship.
35) is engaged by pin-groove loose fitting.

According to a fifth aspect of the invention, in the automobile air conditioner according to the fourth aspect, the first lever piece (2
A U-shaped engaging groove (23a) is formed in 3), and a pin (36) is provided on the other end side of the second lever piece (35). The engaging groove (23
It is characterized in that it is loosely fitted in a).

The reference numerals in parentheses of the above-mentioned means indicate the correspondence with the concrete means described in the embodiments described later.

[0012]

According to the inventions of claims 1 to 5,
In the regions of the maximum cooling side and the maximum heating side of the temperature adjustment mechanism, the movement amount of the first lever piece on the sliding door side is substantially zero with respect to the movement amount of the second lever piece of the link mechanism. , The other end side of the second lever piece and the first lever piece are engaged with each other. Therefore, in the regions of the maximum cooling side and the maximum heating side, the movement amount of the first lever piece (that is, the sliding door The amount of movement) becomes almost zero, and the temperature of blown air can be maintained substantially constant.

Therefore, the maximum cooling capacity and the maximum heating capacity can be reliably set even if there are some variations in the dimensions of the link mechanism, the temperature adjusting mechanism, and the like. On the other hand, in the region of the intermediate temperature control, the blown air temperature can be linearly changed by linearly changing the movement amount of the first lever piece with respect to the operation amount of the temperature adjustment mechanism. The temperature can be adjusted well.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 is an air conditioning unit installed in a lower portion of a vehicle interior instrument panel in an air conditioning system for an automobile, and 2 is an air inlet thereof. Air is blown into the air inlet 2 from a blower unit (not shown) arranged in front of the passenger seat below the instrument panel in the passenger compartment.

As is well known, this blower unit is composed of an inside / outside air switching box for switching and introducing air inside or outside the vehicle compartment, and a centrifugal multi-blade blower for blowing air introduced through the inside / outside air switching box. There is. 3 is the air conditioning unit 1
The resin case is disposed in the lower part of the vehicle interior instrument panel in a substantially central portion in the vehicle interior left-right direction. This case 3
An evaporator 4 serving as an air cooling means is disposed on the upstream side of the inside of the inside, and a heater core 5 serving as an air heating means is disposed on a lower side portion on the downstream side of the air.

Further, in the case 3, a cold air passage 6 through which the cool air cooled by the evaporator 4 bypasses the heater core 5 flows to an upper side portion on the air downstream side of the evaporator 4 (upper side portion of the heater core 5). Has been formed. The evaporator 4 is a cooler that constitutes a known refrigeration cycle together with a compressor, a condenser, a liquid receiver, and a decompressor (not shown), and dehumidifies and cools the air in the case 3. The compressor is driven by an automobile engine via an electromagnetic clutch (not shown). Also,
The heater core 5 is a heater that uses the cooling water of the automobile engine as a heat source, and reheats the cold air cooled by the evaporator 4.

Then, in the case 3 at the air downstream side portion of the evaporator 4, cold air for sending the air passing through the evaporator 4 to the cold air passage 6 and the inlet of the heating passage 7 to the heater core 5, respectively. An opening 8 for heating and an opening 9 for heating are formed. Cold air opening 8 and heating opening 9
1 is opened on the same plane as shown in FIG. 1, and is constituted by a projecting wall portion 10 projecting from the inner side wall of the case 3 and a partition wall 11 located substantially in the center of the case 3.

The openings 8 for cold air and the openings 9 for heating have a substantially rectangular opening shape when viewed in the direction of arrow A in FIG. 1, and are formed in parallel in the vertical direction. The partition wall 11 is formed so as to extend horizontally from the intermediate portion between the openings 8 and 9 toward the air downstream side, and is for partitioning the cold air passage 6 and the heating passage 7. As a result, all the air taken into the heating passage 7 from the heating opening 9 is sent to the heater core 5. On the contrary, all the air taken into the cold air passage 6 from the cold air opening 8 bypasses the heater core 5.

At the air downstream side of the evaporator 4, an opening 8 for cold air is provided.
On the upstream side of the heating opening 9 and the air, a slide type door 12 for adjusting the amount of air that has passed through the evaporator 4 and is sent to the cold air passage 6 and the heating passage 7 is provided. There is. The details of the sliding door 12 will be described later. An air mix chamber portion (cool / warm air mixing space) 13 for mixing the cold air and the hot air that have passed through the cold air passage 6 and the heating passage 7 is provided at the air downstream side portion of the cold air passage 6 and the heating passage 7. ing. By mixing the cool air flowing through the cold air passage 6 and the hot air flowing through the heating passage 7 in the air mix chamber portion 13, a desired air conditioning air temperature can be obtained.

A link mechanism 14 for actuating the slide door 12 is disposed in a space from the cold air passage 6 to the air mix chamber 13 in the space inside the case 3. Reference numeral 14 also serves to adjust the air flow direction of the cold air and the hot air blown out from the cold air passage 6 and the heating passage 7,
The details of the link mechanism 14 will be described later in the same manner as the sliding door 12.

In the case 3, the air mix chamber portion 13 has two outlet air passages 1 at the air downstream side.
5 and 16 and one passage 15 is
As shown in FIG. 1, it extends upward, and on the air downstream side of this passage 15, there is a face outlet (not shown) for blowing out conditioned air toward the upper half of the occupant in the passenger compartment. A face outlet air passage 17 connected thereto and a defroster outlet air passage 18 connected to a defroster outlet (not shown) for blowing out conditioned air toward the inner surface of the windshield of the vehicle are provided.

The other passage 16 extends downward, and a foot outlet 19 for blowing out conditioned air toward the lower body of the occupant is provided on the air downstream side of the passage 16. Has been. Then, the above-mentioned passages 15 and 1
A first switching door 20a for selecting whether to blow the conditioned air conditioned in the case 3 to the passage 15 or the passage 16 is provided at the branching portion of 6. When the first switching door 20a is in the rotating position shown by a in FIG. 1, all the conditioned air is sent to the passage 15 side, and when it is in the rotating position shown by b in FIG. It is sent to the passage 16 and blown out from the foot outlet 19.

Further, in the air downstream side portion of the passage 15,
The second switching door 20b is arranged, and this door 20b
The air-conditioning air sent to the passage 15 is selected to flow to the face blowing air passage 17 side or the defroster blowing air passage 18 side. Specifically, the first
When the switching door 20a is in the rotating position shown by a in FIG. 1 and the second switching door 20b is in the rotating position shown by c in FIG. 1, the conditioned air flows toward the defroster blown air passage 18 side, and When the first switching door 20a is in the rotation position shown by a in FIG. 1 and the second switching door 20b is in the rotation position shown by d in FIG. 1, the conditioned air is directed to the face outlet air passage 17 side. Flowing.

Next, the sliding door 12 and the link mechanism 14 described above will be described in detail. FIG. 2 shows an exploded view of the sliding door 12. Sliding door 12 shown in FIG.
The assembly drawing of is shown. The sliding door 12 is the case 3 in FIG.
The installation figure attached inside is shown.

The sliding door 12 includes a support member 21 and
The film member 22 is arranged so as to cover the one flat surface portion 21a of the support member 21 on the air downstream side. The support member 21 is made of a resin material such as polypropylene and has a substantially rectangular outer shape. And the support member 2
1 has four through holes (openings) 24a as shown in FIG.
Since 24d are formed, the support member 21
It has a frame-like shape like a square and has a cross-shaped support portion 21b.

At both ends of the support member 21 (both ends on the front side and the back side in FIG. 2), a mounting portion 25 is bent from the one flat surface portion 21a in a substantially vertical direction over its entire length.
a and 25b are integrally formed. A plurality of cylindrical protrusions 26 protruding at equal intervals are integrally formed on the outer surfaces of the mounting portions 25a and 25b.
These mounting portions 25a and 25b are for mounting the film member 22 to the support member 21, which will be described later. These mounting portions 25a and 25b are formed at the upper end portion and the lower end portion of the sliding door 12 as shown in FIGS.

On the other hand, the support member 21 in the left-right direction in FIG.
A plurality of (two) columnar holding portions 32, which project from the both end surfaces and hold the support member 21 in the case 3 so as to be movable, are integrally formed on both end surfaces of the. Further, a lever piece 23 having a U-shaped engaging groove 23a is formed on the upper surface of the supporting portion 21b of the supporting member 21. As shown in FIG. 1, the lever piece 23 extends from the flat surface portion 21a on the air downstream side of the support member 21 to the cold air passage 6
It is formed so as to project to the side.

The film member 22 is preferably made of a resin material which is flexible, has no air permeability, and has a small friction resistance. Specifically, for example, the thickness 7
It is made of a resin film formed of 5 μm polyethylene terephthalate and has a substantially rectangular shape. here,
To describe the size of the film member 22, the width Z of the film member 22 is equal to the width W of the support member 21. On the other hand, the height Y of the film member 22 depends on the support member 2
The height X of 1 and the width of the mounting portions 25a and 25b (twice the width indicated by V in FIG. 2) are set to be larger by a predetermined amount.

A plurality of mounting holes 28 are formed at both ends of the film member 22 at equal intervals as the plurality of protrusions 26 formed on the supporting member 21. Also, the film member 2
2 has an insertion hole 30 into which the lever piece 23 is inserted. In order to attach such a film member 22 to the support member 21, first, the three attachment holes 28 arranged at equal intervals are formed in the support member 21 at one end side of the film member 22.
Is fitted (or loosely fitted) to the protrusion 26 on one end side of the. Then, while inserting the lever piece 23 of the support member 21 into the insertion hole 30, the three mounting holes 28 on the other end side are fitted (or loosely fitted) to the protrusions 26 on the opposite side. Then, the film member 22 is heat-welded to the attachment portions 25a and 25b of the support member 21, for example, by melting the protrusion 26 with a heating device (not shown). Thereby, the film member 22
Are fixed to the support member 21 (see FIG. 3).

Since the width Z of the film member 22 is set in the relationship of Z = W as described above, the widths of the support member 21 and the film member 22 in the left-right direction (see FIG. 3) as shown in FIG. The width indicated by E) is the same for both, and they overlap exactly. On the other hand, since the height of the vertical direction in FIG. 3 (the dimension indicated by F in FIG. 3) is larger than the dimension of the film member 22, there is a space between the flat surface portion 21 a of the support member 21 and the film member 22. The film member 22 is bent so that the film member 22 can be bent.

Here, the mounting structure of the support member 21 and the film member 22 in the case 3 will be briefly described. FIG.
The resin case 3 shown in FIG. 2 has a front side and a back side of the paper.
The case body divided into two parts is integrally joined by means such as a metal clip and a screw, and the inner wall of each divided case body of the case 3 has a cross section as shown in FIG. An elongated hole-shaped guide groove 33 is formed in the vertical direction of the case 3. This guide groove 33 is shown in FIG.
As shown in FIG. 1, only one position is shown on the back side of the paper surface, but in practice, the guide grooves 33 are provided at two positions on the inner wall of each divided case body of the case 3 facing each other.

The extending direction of the guide groove 33 is substantially perpendicular to the flow direction of the air flowing in the case 3,
Moreover, the cold air openings 8 and the heating openings 9 are formed so as to be parallel to the open plane. Further, the guide groove 33 is formed in the air upstream side of the cold air opening 8 and the heating opening 9 in the vicinity of these openings.

Then, the holding portion 32 of the supporting member 21.
Is inserted into the guide groove 33 of one case body, and the holding portion 32 on the opposite side is further inserted into the guide groove 33 of the other case body so that the support member 21 is sandwiched by the two case bodies. The support member 21 is housed in the case 3, and the support member 21 is slidably held in the extending direction of the guide groove 33.

In this stored state, the supporting member 21 is arranged so that the extending direction of the one flat surface portion 21a thereof is substantially perpendicular to the direction of the air flow in the case 3 (in other words, the direction transverse to the air flow). Since the support member 21 moves along the guide groove 33, the support member 21 always moves in this extending direction. Further, as shown in FIG. 4, the mounting portions 25a and 25b are located at both ends of the support member 21 in the moving direction.

Next, the link mechanism 14 described above will be described in detail with reference to FIG. The link mechanism 14 has a drive shaft 37 whose both ends are rotatably supported by the case 3, and the drive shaft 37 is made of a resin material such as polypropylene. The drive shaft 37 is arranged in the air mix chamber portion 13 in the case 3 so as to be positioned in the horizontal direction (the vehicle left-right direction). An air guide plate 34 for adjusting the air flow direction of the air mix chamber 13 in the case 3 and a lever piece 35 are integrally formed on the drive shaft 37. One end side of the lever piece 35 is connected to the drive shaft 37, and is arranged so as to extend from the portion of the drive shaft 37 toward the lever piece 23 side of the support member 21.

Further, the lever piece 35 is formed at a substantially intermediate portion in the axial direction of the drive shaft 37, and a cylindrical engaging portion (pin) 36 is integrally formed on the other end side thereof. The joint portion 36 is inserted into the U-shaped engagement groove 23a of the lever piece 23 of the support member 21 by loose fitting.
Therefore, the lever piece 35 is rotatably engaged with the engagement groove 23 a of the lever piece 23 of the support member 21.

The engagement relationship between the lever piece 35 and the lever piece 23 of the support member 21 is set as follows.
That is, in the region on the maximum cooling side shown in FIG. 1 and the region on the maximum heating side shown in FIG. 5, both lever pieces 23 and 35 are engaged in a bent positional relationship as shown in FIG.
In the intermediate temperature control region shown in, both lever pieces 23, 35
Are engaged in a substantially linearly extending positional relationship as shown.

Further, one end side (the side not shown in FIG. 4) of the drive shaft 37 is rotatably supported by the wall surface of the case 3 so as not to project outside, but the other end side thereof is A drive lever 27, which is a drive means that projects to the outside of the case 3 and drives the drive shaft 37, is connected. The air guide plate 34 is formed in an elongated rectangular flat plate shape along the axial direction of the drive shaft 37, and rotates together with the drive shaft 37 to change its direction.

With the above construction, as the drive shaft 37 rotates, the lever piece 35 also rotates integrally with the air guide plate 34, and the position of the engaging portion 36 of the lever piece 35 moves vertically in FIG. To do. By the movement of the engaging portion 36, the supporting member 21 receives a vertical force via the lever piece 23 and follows the guide groove 33 in the vertical direction in FIG. 4 (substantially perpendicular to the air flow direction flowing in the case 3). Direction). .

The drive mechanism of the drive lever 27 described above may be a well-known one. In this example, the air conditioning control panel 40 provided on the instrument panel of the passenger compartment is provided with a manually operable temperature adjusting operation lever 41. Operation lever 41 and drive lever 2
A control cable 42 is connected to 7 and. Therefore, the manual operation force applied to the temperature adjusting operation lever 41 is applied to the drive lever 2 via the control cable 42.
7, the drive lever 27 is rotated.

Instead of the mechanism for rotating the drive lever 27 via the control cable 42 by the manual operation force of the temperature adjusting operation lever 41 as described above, an actuator such as a servo motor automatically controlled by the air conditioning controller. A mechanism for rotating the drive lever 27 may be used. Next, the operation of this embodiment with the above-mentioned configuration will be described. First, the max hot (maximum heating state) shown in FIG. 5 will be described.

The state shown in FIG. 5 is an operating position in which the support member 21 and the film member 22 are located at the highest position,
With this operating position, the heating opening 9 is fully opened and the cold air opening 8 is fully closed. As a result, all the cool air that has passed through the evaporator 4 and is cooled is sent to the heater core 5. The shape of the film member 22 in this state is schematically shown in FIGS. 6 and 7.

FIG. 6 shows the state of the film member 22 when the blower is stopped, and FIG. 7 shows the state of the film member 22 when the blower is operating. As shown in FIG. 6, when the blower is stopped, the film member 22 maintains its natural shape, and there is a slight gap between the peripheral edge portion 38 of the cold air opening 8 and the film member 22. However, as shown in FIG. 7, when the blower is operating, the air (arrow D in FIG. 7) passing through the evaporator 4 passes through the through holes 24 a to 24 d of the supporting member 21 and is blown onto the inner surface of the film member 22. The wind pressure causes the film member 22 to move.
Bends to the left in FIG. 7, and comes into pressure contact over the entire circumference of the peripheral edge portion 38 of the cold air opening 8.

As a result, the cold air opening 8 is reliably closed by the film member 22, and the sealing effect for closing can be sufficiently enhanced. Therefore, air does not leak from the cold air opening 8 at the time of max hot,
All the cool air that has passed through the evaporator 4 is sent to the heating passage 7 from the heating opening 9.

In this max hot state,
As shown in FIG. 5, the air guide plate 34 of the link mechanism 14 is in an operating position that maximizes the opening area of the heating passage 7 on the outlet side. Next, an air mix time (intermediate temperature control) in which the air that has passed through the evaporator 4 is sent to both the cold air passage 6 and the heating passage 7 by the sliding door 12 will be described with reference to FIG.

In this case, the support member 21 and the film member 22 are located at substantially the middle in the vertical direction in the case 3 as shown in FIG. 8, and the opening area between the cold air opening 8 and the heating opening 9 is large. The air-conditioning air temperature desired is obtained by adjusting the ratio and mixing the air that has passed through both openings 8 and 9 in the air mix chamber 13. Where if
The air taken in from the cold air opening 8 is separated by the partition 11
Leaks from between the film member 22 and the film member 22, and the heating passage 7
If it goes in, there arises a problem that a desired mixing ratio cannot be obtained. On the contrary, if the air taken in from the heating opening 9 leaks out between the partition 11 and the film member 22 and enters the cold air passage 6, the problem that the desired mixing ratio cannot be obtained also arises. .

However, in this embodiment, the air passing through the evaporator 4 passes through the through holes 24a to 24d,
Since the film member 22 is blown against the film member 22, the film member 22 bends so as to bulge toward the partition portion 11 side, and the film member 22 is pressed against the end surface of the partition portion 11 by wind pressure, so that the above-described problem can be prevented. Therefore, the film member 22 can adjust the opening areas of the cold air passage 6 and the heating passage 7 to obtain a desired conditioned air temperature. .

In this case, the air guide plate 34 of the link mechanism 14 rotates in the direction of arrow G from the state shown in FIG. 5 to the state shown in FIG. 8 to reduce the opening area of the heating passage 7 on the outlet side. At the same time, the air guide plate 34 is set to an operating position where the portion of the heating passage 7 close to the partition 16a with the passage 16 is closed. As a result, the heating passage 7
The air that has passed through flows through the film member 22 and the air guide plate 34 (see FIG. 8) with its flow direction changed by the air guide plate 34, and flows to the cold air passage 6 side.

Therefore, the warm air collides with the cold air flowing through the cold air passage 6 from between the film member 22 and the air guide plate 34 in the orthogonal direction or in the slightly opposite direction, and the cold and warm air is easily mixed. Therefore, the cold and warm air can be uniformly mixed in the air mix chamber section 13. Next, Max Cool (maximum cooling state) shown in Fig. 1
Time will be explained.

The state shown in FIG. 1 is a state in which the support member 21 is located at the lowest position, and the heating opening 9 is fully closed and the cold air opening 8 is fully opened. Are sent to the cold air passage 6. The state of the film member 22 at the time of the max cool is similar to that at the time of the max hot described above, and thus the description thereof will be omitted.

In this max-cool state, the air guide plate 34 of the link mechanism 12 further rotates in the direction indicated by the arrow G from the rotating position shown in FIG. 8 to maximize the opening area of the heating passage 7 on the outlet side. The operating position will be narrowed down.
Here, air does not flow in the heating passage 7, but the temperature is slightly warmed by the heat radiation from the heater core 5 (heat is naturally circulated in the heater core 5 so that there is heat radiation by natural convection). The wind mixes with the air mix chamber portion 13 as indicated by an arrow K in FIG. 1 to cause a problem that cooling performance is deteriorated.

However, the air guide plate 34 is in an operating position where the opening area on the outlet side of the heating passage 7 is maximally narrowed, and the warm air heated by the air guide plate 34 is heated by the heater core 5. Since it plays the role of a blocking wall that suppresses the mixture into 13, the deterioration of the cooling performance due to the heat radiation from the heater core 5 can be minimized.

Further, as shown in FIG. 1, the air guide plate 34
However, tilted upward to the left (air mix chamber 13
Since the air downstream side of the air is inclined upward, the air that has passed through the cold air passage 6 is blocked so as not to flow into the heating passage 7, and the role of a guide that guides this air to the passage 15 or the passage 16 side. Is also playing. Further, the present embodiment has the following characteristics regarding the temperature control characteristic.

That is, in the present embodiment, the lever piece 35 and the lever piece 23 of the support member 21 are bent at the bent positions shown in the maximum cooling side shown in FIG. 1 and the maximum heating side shown in FIG. In the region of the intermediate temperature control shown in FIG. 8, the lever pieces 23 and 35 are engaged in a positional relationship that extends substantially linearly as shown in the drawing.

Therefore, in the regions on the maximum cooling side shown in FIG. 1 and the maximum heating side shown in FIG. 5, the lever piece 23 with respect to the operation amount of the temperature adjusting lever 41 (movement amount of the lever piece 35).
Of the sliding door 12, that is, the amount of movement of the sliding door 12, becomes almost zero, and the temperature of the blown air can be maintained substantially constant. On the other hand, in the region of the intermediate temperature control shown in FIG. 8, the lever pieces 23 and 35 are engaged with each other in a positional relationship that extends substantially linearly. Therefore, the operation amount of the temperature adjusting lever 41 (movement of the lever piece 35 is The amount of movement of the lever piece 23 linearly changes in a one-to-one relationship with the amount.

The solid line in FIG. 9 is the temperature control characteristic according to the present embodiment.
Due to the engagement relationship of Nos. 3 and 35, an S-shaped control pattern is provided in which the blown air temperature is substantially constant in the maximum cooling side region and the maximum heating side region. According to this S-shaped control pattern, the blowout air temperature becomes constant with respect to the operation amount of the temperature adjusting lever 41 in the maximum cooling side area and the maximum heating side area, so that the link mechanism 14 and the temperature adjusting lever are controlled. 41, the control cable 42, and the like, even if there are some variations in size, when the temperature adjusting lever 41 is operated to the maximum cooling position or the maximum heating position, the sliding door 12 is opened due to the existence of the region having the above-mentioned predetermined width. It can be reliably positioned at the maximum cooling position or the maximum heating position, and the maximum cooling capacity and the maximum heating capacity can be reliably set.

In the region of the intermediate temperature control, the moving amount of the lever piece 23 linearly changes in a one-to-one relationship with the operating amount of the temperature adjusting lever 41 (moving amount of the lever piece 35), and blows out. Since the air temperature can be changed linearly, the blown air temperature can be controlled well. As described above, the flat plate-shaped support member 21 and the film member 22 are in the same direction as the extending direction of the flat plate, and move in a direction substantially perpendicular to the air flow direction in the case 3, thereby supporting the support member 21 and the film member 22. The working space of the film member 22 can be reduced. Specifically, the width in the left-right direction (vehicle front-rear direction) in FIG. 1 can be significantly shortened as compared with the conventional rotary air-mix door.

Moreover, since the link mechanism 14 for operating the support member 21 is installed in the space from the cold air passage 6 in the case 3 to the air mix chamber portion 13, the clearance X between the support member 21 and the evaporator 4 is set. (FIG. 1) can be reduced to the necessary minimum. Further, since the link mechanism 14 is built in the case 3, the link mechanism 1 is provided outside the case 3.
It is not necessary to secure the installation space of 4.

As a result, the size of the vehicle air conditioner can be greatly reduced. Further, the film member 22 is bent by the wind pressure and brought into pressure contact with the peripheral edge portion 38 and the partition wall 11, whereby the film member 22 can be reliably sealed. Further, at this time, since the air pressure is used for sealing, it is possible to reduce the operating force of the supporting member 21 far more than sliding by pressing with a packing or the like. Moreover, since the support member 21 and the film member 22 move substantially perpendicular to the air flow direction, no matter which direction the support member 21 and the film member 22 are moved, the wind force does not cause an increase in the operating force. .

Further, the lever piece 2 in the link mechanism 14
By devising the engagement relationship of Nos. 3 and 35, a good S-shaped temperature control characteristic capable of reliably setting the maximum cooling capacity and the maximum heating capacity without being affected by the dimensional variation of the link mechanism 14 or the like is provided. can get. In addition, in the above-described embodiment, the support member 21 is arranged so as to be substantially perpendicular to the flow direction of the air flowing in the case 3, but the film member 22 is used.
If the member can be bent by wind pressure, the support member 21
May be inclined with respect to this air flow direction.

The present invention can also be applied to an automobile air conditioner of the type that does not have the evaporator (cooler) 4 and blows air as it is into the heater core (heater) 5 and the cool air passage 6 side. Of course. The maximum cooling state in this type of vehicle air conditioner is a state in which the entire amount of blown air passes through the cold air passage 6 without being heated by the heater core 5.

[Brief description of drawings]

FIG. 1 is a schematic configuration cross-sectional view showing a state at the time of max cool in an embodiment of the device of the present invention.

FIG. 2 is an exploded perspective view of a supporting member and a film member in the sliding door shown in FIG.

FIG. 3 is a perspective view of an assembled state of the support member and the film member shown in FIG.

FIG. 4 is a perspective view showing a state where the sliding door is stored and held in a case.

FIG. 5 is a schematic configuration cross-sectional view showing a state at the time of max hot in one embodiment of the device of the present invention.

FIG. 6 is a partial structural view showing a state of the film member when the blower is stopped.

FIG. 7 is a partial structural view showing a state of the film member when the blower is operating.

FIG. 8 is a schematic configuration sectional view showing a state during air mixing in one embodiment of the device of the present invention.

FIG. 9 is a graph showing temperature control characteristics of an example of the device of the present invention and a comparative example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Air conditioning unit, 3 ... Case, 4 ... Evaporator, 5 ... Heater core, 6 ... Cold air passage, 7 ... Heating passage, 12 ... Sliding door, 13 ... Air mix chamber part, 14 ... Link mechanism, 15, 16 , 17, 18 ... Blow-out air passages, 2
1 ... Support member, 22 ... Film member, 23 ... 1st lever piece, 35 ... 2nd lever piece, 37 ... Drive shaft, 41 ... Temperature adjusting lever.

Claims (5)

[Claims] 1. A heater for heating blown air, a cool air passage provided in parallel with the heater, for passing the blower air to bypass the heater, air passing through the cool air passage, and the heater. A cold / warm air mixing space that mixes with the warm air that has been heated by passing through, and an outlet air passage that is provided on the air downstream side of this cold / warm air mixing space and that guides the air from this cold / warm air mixing space to the vehicle interior outlet. And, on the air upstream side of the heater and the cold air passage, slidably provided in a direction that traverses the air passage to the heater and the cold air passage, and adjusts the air flow rate to the heater and the cold air passage. A sliding door for adjustment and a link mechanism connected to the sliding door for sliding the sliding door in the transverse direction are provided, and the link mechanism includes a first door provided on the sliding door. Lever piece , A drive shaft provided so as to be rotated by the temperature adjusting mechanism, and a second lever piece coupled to the drive shaft, and in the regions of the maximum cooling side and the maximum heating side of the temperature adjusting mechanism, The second lever piece and the first lever piece are engaged so that the movement amount of the first lever piece is substantially zero with respect to the movement amount of the second lever piece. Air-conditioning system for automobiles. 2. A cooler for cooling blown air, a heater provided on the air downstream side of the cooler for heating cold air cooled by the cooler, and the heating on the air downstream side of the cooler. A cool air passage that is provided in parallel with the heater and that bypasses the heater and allows the cool air to flow, and a cold-hot air mixing space that mixes the cold air and the warm air that has been heated by passing through the heater. An air passage to the heater, which is provided on the air downstream side of the air-mixing space and which introduces air from the cold / hot air mixing space to the vehicle interior outlet, and between the cooler and the heater. And a sliding door that is slidable in a direction crossing the cold air passage and adjusts an air flow rate to the heater and the cold air passage, and is connected to the sliding door, and the sliding door is connected to the sliding door. Link mechanism that slides in the direction The link mechanism includes a first lever piece provided on the sliding door, a drive shaft provided to be rotated by a temperature adjusting mechanism, and a second shaft connected to the drive shaft. And a lever piece, and in the regions of the maximum cooling side and the maximum heating side of the temperature adjustment mechanism, the movement amount of the first lever piece is substantially zero with respect to the movement amount of the second lever piece. An air conditioner for an automobile, wherein the second lever piece and the first lever piece are engaged with each other. 3. The sliding door includes a support member having an opening, a flexible film member provided on the air downstream side of the support member so as to be movable integrally with the support member, and the support member. And a guide mechanism for guiding the movement of the support member so as to move the film in the transverse direction, the film member having an air passage opening to the heater by wind pressure of air received through the opening of the support member, and The air conditioner for an automobile according to claim 1 or 2, wherein the air conditioner is configured so as to be capable of being pressed against the peripheral edge of the opening to the cold air passage. 4. In the regions on the maximum cooling side and the maximum heating side of the temperature adjusting mechanism, the first lever piece is bent so that the first lever piece bends relative to the second lever piece. The second lever piece is engaged by pin-groove loose fitting, and in the intermediate temperature control region of the temperature adjusting mechanism, the first lever piece extends substantially linearly with respect to the second lever piece. 4. The automobile according to claim 1, wherein the first and second lever pieces are engaged by pin-groove loose fitting so that they have a positional relationship. Air conditioner. 5. A U-shaped engagement groove is formed in the first lever piece, and a pin is provided on the other end side of the second lever piece. The automobile air conditioner according to claim 4, wherein the air conditioner is loosely fitted in the groove.