JPH0452096Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an air conditioner for an automobile, and particularly relates to an air conditioner for an automobile of a cold air bypass type.

[Prior Art] Conventionally, as an air conditioner for an automobile, an evaporator in a cooler unit dehumidifies and cools air to create cold air, and a heater core heats this cold air to create warm air. There is a cold air bypass system that mixes the air and bypasses the cold air to a cold air bypass passage that is different from the air mix passage, and blows it out from the vent outlet as necessary to improve the driver's feeling. .

About this type of automobile air conditioner
An overview will be given with reference to Figures 4 to 4. FIG. 1 is a schematic sectional view of this air conditioner for an automobile, and the air conditioner case 1 is provided with a blower 2, an evaporator 3 of a cooler unit, and a heater core 4.

The air taken in from outside or inside the vehicle via the blower 2 is dehumidified and cooled by the evaporator 3, and converted into warm air by the heater core 4, which is linked to the air mix door 5 provided on the heater core 4 and the air mix door 5. The mixing ratio of cold air and hot air is determined according to the opening/closing state of the auxiliary door 6, and is supplied to the air mix chamber 8 in the distribution box 7 at the next stage.

In addition, by providing a partition wall 9 for cold air bypass in the upper part of the air conditioner case 1, a cold air bypass passage 10 for supplying only the cold air from the evaporator 3 to the distribution box 7, and an air mixer for bypassing the heater core 4 are created. A cold air passage 11 is formed for use. By opening and closing the cold air bypass door 12, the supply of cold air bypassed from the evaporator 3 is controlled.

Further, as shown in FIG. 3, the conditioned air that has passed through the air mix chamber 8 passes through a defrost outlet 13, a vent outlet 14, and a foot outlet 15 to a defrost outlet, a vent outlet, and a foot outlet, respectively. (both not shown) is designed to blow out into the passenger compartment. A defrost door 16, a vent door 17, and a foot door 18 are provided at the defrost outlet 13, vent outlet 14, and foot outlet 15, respectively, so as to be rotatably openable and closable.

Furthermore, as shown in FIGS. 2 and 3, the cold air from the cold air bypass passage 10 is transferred to the vent chamber 1
The air distribution control door 2 controls the distribution of cold air to the left and right vent outlets, which is the bypass outlet 20 that merges with the conditioned air from 9 and blows it out.
1, and by controlling the rotation of the wind control door 21 around the door axis 22, the airflow volume is adjusted by adjusting the appropriate inclination, and the conditioned air is blown out from the left and right vent outlets. There is.

Since the wind distribution control door 21 is provided so as to protrude into the cold air bypass passage 10, the cold air is guided by the air distribution control door 21 to the left side (passenger seat side) in FIGS. 1 and 2. The problem is that the air is blown out more strongly from the vent outlet, making it difficult to control the temperature on both sides.

Note that even if the air distribution control door 21 is not provided, the air conditioner case 1 or the distribution box 7 in which the cold air bypass passage 10 is formed has a collision wall 23 that is substantially orthogonal to the cold air bypass passage 10. The cold air supplied from the cold air bypass passage 10 heads toward the bypass outlet 20 along this collision wall 23, and the air distribution control door 2
1, there is a problem in that both the volume and the strength of the cold air become stronger toward the vent outlet on the right side (driver's seat side) in FIGS. 1 and 2 of the air distribution control door 21.

In short, as shown in Fig. 4, the rotation angle of the wind guard control door 21 is plotted on the horizontal axis (0 degrees when the wind guard control door 21 is in the right fully closed position, and 180 degrees when it is in the left fully closed position). ) and using a graph with the air volume on the vertical axis, the air volume blown out from the left and right outlets changes according to the rotational state of the airflow control door 21, but it is very strong on the left side. It can also be seen that there is an imbalance in left and right balance. In other words, in such a conventional air conditioner, there is a problem in that the temperature controllability of the cold air is poor and it is difficult to adjust the conditioned air at the left and right vent outlets.

Further, when the main stream of conditioned air that has been air mixed in the air mix chamber 8 flows into the vent chamber 19, it is deflected to the right or left side by the bypassed cold air as described above. If the air is hot, there are problems such as the phenomenon where the right side is warm and the left side is cold (or vice versa). In other words, there is a problem in that the air volume distribution changes due to the cold air passage bent as described above, and the temperature distribution also changes due to the change in the air volume distribution.

In order to solve the above-mentioned problems, a pair of air dampers or adjustment doors are installed at the left and right outlets, as in Japanese Utility Model Publication No. 51-41718, Japanese Utility Model Publication No. 52-2990, or Japanese Patent Application Laid-open No. 178914/1983. Some models are equipped with a
Blower 2, evaporator 3 and heater core 4
In the case of a series type air conditioner arranged in a row, the collision wall 23 is required, and the pair of air dampers, etc. are set at equal positions (the opening degrees are the same).
The air volume on the right side becomes stronger, and even when the right side is fully open and you want to increase the air volume on the left side, the air volume on the left side will not increase unless you reduce the air volume on the right side. It is something that cannot be done.

Furthermore, since the door shaft 22 of the wind control door 21 faces inside the distribution box 7, the second
There is also the problem that the bypass cold air coming from the left side of the figure acts as resistance, resulting in poor operability.

[Problems to be solved by the invention] This invention was developed in consideration of the above-mentioned problems, and it guides the cold air supplied from the side toward the front into the passenger compartment, and then connects the left and right vent outlets. In order to guide and blow out the air to the left and right vents, the air volume adjustment function of the conditioned air to the left and right vent outlets, the temperature control performance of the air-mixed conditioned air and the bypassed cold air, and the operability of the air distribution control door are considered. The present invention aims to provide an improved air conditioner for automobiles.

[Means for Solving the Problems] In other words, the present invention has two or two systems of air distribution control doors interlocked to open and close in opposite directions in order to distribute the cold air that has bypassed the cold air bypass passage to the left and right. This air conditioner for an automobile is characterized in that it is provided at a bypass outlet and its rotation axis is provided upstream of a wind distribution control door.

[Function] In the automotive air conditioner according to the present invention, two or two systems of airflow control doors are interlocked so that the opening and closing states of the doors are opposite to each other. That is, for example,
When the right side airflow control door is fully open, the left side airflow control door is fully closed, and when the right side is completely closed, the left side is fully open, and due to the collision wall located on either the left or right side, the left side airflow control door is fully closed. A large amount of air will blow out, but since the two airflow control doors mentioned above are linked, for example, even if you increase the airflow on the right side, there will not be any airflow on the left side. It is possible to achieve appropriate distribution and improvement. Therefore,
Temperature control with air-mixed conditioned air is also good.

In addition, since the door shaft of the wind distribution control door is provided on the upstream side, the wind distribution control door is opened and closed on the downstream side of the bypassed cold air, which improves the operability of the ventilation control door. .

[Example] Next, an example of the present invention is shown in Figs. 5 to 8.
This will be explained based on the diagram. However, the same parts as in FIGS. 1 to 4 are given the same reference numerals, and detailed description thereof will be omitted.

FIG. 5 schematically shows the structure of a portion similar to that in FIG. 2 of an automotive air conditioner according to an embodiment of the present invention, in which a bypass outlet 20 located on the side of the vent chamber 19 is A pair of wind control doors 30R and 30L are provided in the section. Therefore, the rotation shafts 31 and 31L of the right side airflow control door 30R and the left side airflow control door 30L are connected to the bypass outlet 2.
0 or at least outside the bypass outlet 20, and the respective wind distribution control doors 30R and 30L are located on the downstream side thereof.

Further, the right side wind distribution control door 30R and the left side distribution control door 30L can be integrally operated by the link member 32, and can be controlled to open and close so that the respective opening and closing states are reversed. More specifically, for example, when the right-hand wind guard control door 30R is fully open, the left-hand wind guard control door 30L is fully open, and when the right-hand wind guard control door 30R is fully open, the left-hand wind guard control door 30L is fully open. As shown in FIG. 7, this link member 32 is located outside the upper part of the distribution box 7 and is connected to an arbitrary drive mechanism via an arbitrary wire or other link mechanism (not shown). Driven by
For example, it is assumed that the rotation is driven by an actuator (not shown) or the like.

In this configuration, as shown in FIG. 8, which is a graph showing the same relationship as FIG. .

To be more specific, when one of the right side airflow control doors 30R is rotated by an actuator or the like, the opening degree of the other left side airflow control door 30L changes accordingly, as shown in FIG. Therefore, the air volume corresponding to each opening degree is supplied more evenly than in the case shown in FIG. 4. In addition, in Fig. 8, when the right side wind guard control door 30R is in the fully closed position, it is 0 degrees,
The fully open position is 90 degrees.

Further, the rotation shafts 31R and 31L of the wind distribution control doors 30R and 30L are located near the bypass outlet 20,
Since 0R and 30L themselves are located outside of the distribution box 7 from the bypass outlet 20, the air distribution control doors 30R and 30L are located outside the bypass outlet 20.
It can be operated without going against the direction of the cold air blown from zero, and is easy to operate.

Therefore, by only slightly rotating either one of the airflow control doors 30R or 30L, the state becomes the same as when the other airflow control door 30L or 30R is closed.
There is no problem that the air volume cannot be secured.

In other words, when the maximum volume of conditioned air can be obtained, the air is blown out evenly from the left and right vent outlets, but in conventional air conditioners, the air distribution control door 21 (second
) is provided, so the cold air bypass passage 1
However, in the present invention, the airflow control doors 30R and 30L are oriented downstream, and additional ventilation resistance is applied to either the left or right airflow control doors 30R or 30L. Since the air distribution control doors 30R and 30L are located in the bypass outlet 20 or the vent center duct, which has a relatively large passage area, there is little obstruction to the cold air blown out from the cold air bypass passage 10. Therefore, ventilation resistance is reduced from the cold air bypass passage 10 to the bypass outlet 20, making it possible to secure the volume of conditioned air and to distribute it relatively to the left and right vent outlets. Uniform blowing can be achieved.

In addition, in the above embodiment, an example was shown in which one link member 32 was used to connect the left and right wind control doors 30R, 30L to an actuator, etc., but it is also possible to connect a pair of link members to an actuator, etc. Each of the pair of link members may be connected to both wind baffle control doors. In addition, it is not limited to the two left and right wind control doors as in the above embodiment, but it is also possible to have two or more wind control doors on each side (four or more in total on the left and right), and on each side. Even in the case of an air conditioner having two systems of ventilation doors, in which two or more ventilation control doors are configured to rotate in the same direction, the opening and closing directions of the left and right sides may be linked in opposite directions. Good too.

[Effects of the invention] As explained above, according to the invention, the left and right airflow control doors are interlocked to open and close in opposite directions, and their rotating shafts are located on the upstream side of the cold air, allowing for good temperature control. Conditioned air can be blown out with a sufficient amount of air, and its operability is also good.

Note that such results can be obtained by using an actuator or the like having a conventional configuration.

[Brief explanation of the drawing]

Fig. 1 is a schematic sectional view of main parts of a conventional air conditioner for an automobile, Fig. 2 is a schematic sectional view taken along the - line in Fig. 1, Fig. 3 is a schematic sectional view taken along the - line in Fig. 1, and Fig. 4 is a schematic sectional view taken along the - line in Fig. 1. The figure is a graph showing the relationship between the opening degree of the wind guard control door 21 and the air volume, and FIG. 5 is a cross-sectional view of a main part showing the same part as FIG. 2 of an automotive air conditioner according to an embodiment of the present invention. FIG. 6 is a perspective view of the main parts of the airflow control doors 30R and 30L, and FIG. 7 is a sectional view of the main parts showing the same part as in FIG. 3.
FIG. 8 is a graph showing the relationship between the opening degree of the airflow control doors 30R and 30L and the air volume. 1...Air conditioner case, 2...Prower, 3...
... Evaporator, 4 ... Heater core, 5 ... Air mix door, 6 ... Auxiliary door, 7 ... Distribution box,
8... Air mix chamber, 9... Partition wall for cold air bypass, 10... Cold air bypass passage, 11
...Cold air passage, 12...Cold air bypass door, 13
...Defrost outlet, 14...Vent outlet, 15
...Foot exit, 16...Defrost door, 17
...Vent door, 18...Foot door, 19...
Vent chamber, 20... Bypass outlet, 21...
Airflow control door, 22...Door axis, 23...
...Collision wall, 30R...Right side wind guard control door, 30L...Left side wind guard control door, 3
1R...rotating shaft, 31L... rotating shaft, 32... link member.

Claims (1)

[Claims for Utility Model Registration] An evaporator that dehumidifies and cools the air taken in through the blower to produce cold air, a heater core that heats this cold air to produce warm air, and a cold air bypass passage that bypasses the cold air from the evaporator. an air conditioner case having a mixture chamber, a vent chamber, and a bypass outlet, the flow of cold air from the cold air bypass passage being bent in the vent chamber and reaching the bypass outlet; The air conditioner for an automobile includes a box, wherein the bypass outlet is located on the downstream side immediately after the flow of the cold air from the cold air bypass passage is bent, and left and right air vents provided on the bypass outlet are provided. An air conditioner for an automobile, characterized in that two systems of air distribution doors for control are interlocked in opening/closing directions opposite to each other, and their rotation shafts are provided on the upstream side of the cold air.