JPS6139607Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is for automobiles equipped with a bilevel door that guides warm air that has passed through the heater core directly to the floor duct and differential duct during bilevel mode, increasing the temperature difference between the air and the air blown from the vent duct. Concerning improvements to air conditioners.

Conventional heater units for automobile air conditioners have a heater core installed inside the heater unit case, and a mix door controls the amount of air flowing to the heater core and the amount of air bypassing the heater core to maintain an appropriate ratio of hot air and cold air. and mix them in the air distribution chamber behind the heater core 7 or distribute air to the vent duct, floor duct, and differential duct without mixing,
It is configured to perform air conditioning in the vehicle interior.

In such a heater unit, in the case of the so-called bilevel mode that performs heating for cold heads and feet, the warm air heated by the heater core and the cold air bypassed by the heater core are not mixed in the air distribution room, and the cold air is sent to the vent duct as warm air. It is necessary to distribute air to each floor duct. However, since hot air and cold air are once introduced into the air distribution room and then distributed to the respective ducts, they tend to be influenced by each other and reduce the temperature difference. However, setting the same temperature difference between a cold region where the outside temperature is sometimes extremely low and a warm region where the outside temperature is not so much will actually make people feel uncomfortable. Therefore, it is desirable to have a two-step temperature difference at bi-level.

As shown in FIG. 1, a heater unit with two levels of temperature difference at bi-level has a bypass port 1 that short-circuits the heater core 7 and the floor duct 5.
2 and a bilevel door 14 that opens and closes the same, and a bilevel mode in which the bilevel door 14 is opened to flow hot air directly into the floor duct 5 to expand the temperature difference, and a bilevel mode in which the bilevel door 14 is closed to flow hot air into the floor duct 5. A bilevel mode is set in which the air is partially mixed with the cold air that bypassed the heater core 7 and blown out with a reduced temperature difference.

However, a heater unit equipped with such a bilevel door requires a control system to open and close the door, which has the disadvantage of making it more sophisticated. Therefore, it is mainly used in luxury cars and not in popular cars. Therefore, two types of heater units are required: one with a bilevel door and one without, which makes consistent production impossible, which leads to a problem in that overall productivity deteriorates. There is. In other words, if the bilevel door 14 is not installed, the bypass port 12 must be blocked by some means, so a wind shield (not shown) is inserted in place of the bilevel door 14 to close the bypass port 12. It was fixed so that it was blocked.
For this reason, in addition to the bilevel door 14, it is necessary to prepare a wind shield and its incidental equipment at the same time.
The cost will be high.

The present invention has been made with attention to such problems, and an object of the present invention is to provide a heater unit for an air conditioner for an automobile, which allows for easy transition from a structure equipped with a bilevel door to a structure not equipped with a bilevel door. The purpose is to solve the above problems.

The present invention achieves this objective by simply reversing the installation state of the lever that rotates the bilevel door in response to the operation of the actuator and fixing it to the heater unit case, thereby eliminating the need for a bilevel door. In some cases, the door can be used as it is as a wind shield to block the bypass port, thereby reducing costs by sharing parts.

Embodiments of the present invention will be described below with reference to the drawings.

Figures 1 to 3 are diagrams showing an embodiment of the present invention, and in the figures, reference numeral 1 is a heater unit of an air conditioner for an automobile, and unit 1 forms a part of an air conditioning air path. Equipped with case 2.
Case 2 has a cold air intake port 3, a vent duct 4 for blowing out conditioned air into the passenger compartment from an outlet installed on the instrument panel in front of the driver's seat of the private vehicle, and a vent duct 4 for blowing out conditioned air into the passenger compartment. A floor duct 5 for blowing out air and a differential duct 6 for blowing out air along the windshield are each provided at predetermined positions. A heater core 7 is provided in the case 2, and hot water after cooling the engine circulates through the heater core 7, exchanging heat with passing air to heat the air. There is a mix door 8 in front of the heater core 7.
One end of the door 8 is rotatably supported, and by changing the degree of opening with respect to the heater core 7, the amount of air flowing to the heater core 7 and the amount of air bypassing the heater core 7 can be controlled. heater core 8
The space behind each of the ducts 4, 5, and 6 forms an air distribution room (also an air mix chamber) 9, and the vent duct 4 and floor duct 5 of the air distribution room 9 are connected to each other. 10 floor doors between
is provided so that it can be opened and closed freely. Although not shown, the vent duct 4 is provided with a vent door, and the differential duct 6 is provided with a differential door to control the wind reaching each duct.

A bypass port 12 is provided in a side wall 11 that partitions the floor duct 5 and the hot air outlet of the heater core 7. A rotation shaft 13 is arranged along the lower side of the bypass port 12 on the side of the heater core 7 of the bypass port 12. It is set up. A bilevel door 14 is disposed at right angles to the middle of the shaft 13 and is fixed at one end, and the door 14 can open and close the bypass port 12 by rotating the shaft 13.
As shown in FIG. 3, one end of the rotating shaft 13 passes through one side wall 2A of the case 2 and projects outside the case, and a lever member 15, which is a bilevel door lever, is attached to the projecting end. is attached in a non-rotating state and detachable. That is, as shown in FIG.
3A is formed, and a screw hole 13B is bored in the flat surface portion of the semi-cylindrical portion. On the other hand, the lever member 15
is formed into an angular shape, and a semicircular hole 15A is bored in the joint part of the vertical piece with the horizontal piece, and the length of the horizontal piece is set in the horizontal piece as shown in FIG. The lever member 15 is placed approximately at the center of the rotation axis 1.
Screw insertion hole 1 through which screw 16 is inserted for attachment to 3
5B is drilled. Then, as shown in FIG. 2 or 3, the semi-cylindrical portion 13A and the semi-circular hole 15A are fitted together, and the horizontal piece of the lever member 15 is brought into contact with the flat surface of the semi-cylindrical portion 13A. In this case, the lever member 15 is removably attached to the rotation shaft 13 in a manner that prevents it from coming off. In this attached state, the screw insertion hole 15B of the lever member 15 matches the screw hole 13B of the semi-cylindrical portion, so that the screw 16 By screwing,
The lever member 15 can be fixed to the shaft 13. Note that the shape of the lever member 15 may be twisted as shown in FIG. in this case,
Since the position of the hole 15C is different between A when it is attached to the actuator and A' when it is fixed to the heater unit case 2A, the boss portion 17C can be formed in a part away from the locus of the actuator, making it easier to attach the actuator. , boss part 17
The presence of C does not inhibit the operation of the actuator. In addition, as shown in FIG.
5C may be provided separately. In this case as well, like the lever member 15 shown in FIG. 4, the boss portion 17C can be formed outside the operating range of the actuator, so the actuator can be easily attached and does not impede the operation of the actuator.

A hole 15C for fixing the lever member 15 to the heater unit case 2A is bored near one end of the vertical piece of the lever member 15, that is, the free rotation end in the attached state. On the other hand, as shown in FIG. 3, the outer wall surface of the case side wall 2A has a boss portion 17 having a screw hole 17, which is an engagement hole.
A is formed. This boss portion 17A receives and supports the lever member 15 when the lever member 15 is inverted and attached (as shown by the imaginary line in FIG. 3). Further, the stupid hole 15C and the screw hole 17 match in the above-mentioned inverted state of the lever member,
If the lever member 15 is fixed to the case 2A by screwing the screw 18 which is a mounting tool there, the rotation axis 1 can be fixed.
The bilevel door 14 above 3 is connected to the bypass port 12.
It is placed in a position to block the Although the screw hole 17 is used as the engagement hole in this embodiment,
This is not the only option if the screw 18 is not used in the fixture. For example, if a fixture having an arrowhead-shaped locking part that is elastically deformed to some extent is used, a simple hole with a narrow entrance may be used.

The mounting position B of the lever member 15 is such that the distance _L1 from the mounting position B to the end surface of the boss portion 17A is approximately the same as the distance _L2 from the mounting position B to the outer surface of the lever member 15. It is set. In other words, the lever member 15 is moved around the screw 16.
When the lever member 15 is turned 180 degrees and approached the case outer wall 2A, the lever member 15 comes into contact with the boss portion 17A. In the case of this embodiment, in order to facilitate the installation of the lever member 15, the distance from the lever member installation position B to the end (step) of the semi-cylindrical portion 13A of the rotation shaft 13 is set from the installation position B to the boss portion. 17
It is set equal to the distance _L1 to the end face of A.

A pivot shaft 15D is protruded from the rotatable free end of the lever member 15, and a control system (not shown) for controlling the opening and closing of the bi-level door can be connected to this pivot shaft 15D via a link bar 19 or the like. It's getting old.

In the heater unit of the automobile air conditioner according to the above configuration, when the opening/closing control system is linked to the bilevel door, the lever member 15
As shown by the solid line in the figure, the rotation shaft 13 is rotated so that the hole 15C is separated from the screw hole 17 of the case side wall 2A.
mounted on. When the control system is set to the bilevel mode, the lever member 15
5D, the door 14, which is fixed to the shaft 13, opens the bypass port 12 as shown by the solid line in FIG. When the bypass port 12 is opened, the warm air heated by passing through the heater core 7 flows directly into the floor duct 5 through the bypass port 12, and the temperature of the air blown from the feet increases. On the other hand, the cold air that has bypassed the heater core 7 directly flows into the vent duct 4 without being mixed with hot air, and the temperature of the air blown from the vent becomes low. Therefore, good heating with cold head and warm feet can be obtained. On the other hand, when the control system is set to normal heating, the lever member 15 rotates in the opposite direction, and the door 14 closes the bypass port 12, as shown by the imaginary line in FIG. Bypass port 12
When the air is blocked, the hot air that has passed through the heater core 7 is obstructed by the hot air door 14 and rises, and is sufficiently mixed with the cold air that has bypassed the heater core 7 in the air distribution chamber 9, and is blown out from each duct as appropriately warm air. Go.

Next, if the opening/closing control system of the bilevel door is not installed, for example, for economical reasons, the lever member 15 has a hole 15C in the case side wall 2A, as shown by imaginary lines in FIGS. 2 and 3. screw hole 1
It is attached to the rotation shaft 13 so as to match the position 7.
Then, insert the screw 18 into this stupid hole 15C,
By screwing into the screw hole 17, the lever member 15 is fixed to the case side wall 2A. In this fixed state, the door 14 is connected to the bypass port 12 due to the arrangement of the screw holes 17.
This results in a state of occlusion. Therefore, the effect of introducing hot air into the floor duct in the bilevel mode as described above cannot be obtained. Therefore, the hot air and cold air that are once guided to the air distribution chamber 9 are then blown out from different ducts, but since they influence each other, they are in a bilevel mode with a small temperature difference.

Incidentally, in this embodiment, a hole 15C for fixing the lever member 15 is separately drilled.
It is also possible to utilize the hole into which the pivot shaft 15D for connecting the actuator is inserted. Further, the lever member 15 may be deformed so that it is fixed at a position considerably distant from the actuator mounting pivot shaft 15D.

As explained above, according to the present invention, the door rotatably provided at the rear of the heater core is configured to be easily fixed, so that a heater unit equipped with a bilevel door and a heater unit equipped with the bilevel door can be constructed in a single structure. This has the effect that it is possible to obtain a heater unit that does not require a heater unit.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention, FIG. 2 is an enlarged perspective view of the main part, and FIG. 3 is an enlarged longitudinal sectional view of the main part. 4 and 5 show other embodiments of the lever member, FIG. 4a is a front view, FIG. 4b is a side view, and FIG. 5 is a perspective view. 2... Heater unit case, 3... Air intake, 4... Vent duct, 5... Floor duct,
6... Def duct, 7... Heater core, 8... Mix door, 9... Air distribution room, 12... Air guide port, 1
3...Rotation axis, 14...Bi-level door, 15...
...Lever member, 15C...Bolt insertion hole, 17...
...screw hole, 18...bolt.

Claims (1)

[Scope of utility model registration request] In a heater unit of an air conditioner for an automobile, which is equipped with a bilevel door behind the heater core that opens and closes a bypass path in which the hot air that has passed through the heater core flows directly into the differential duct and floor duct without being mixed with the cold air that has bypassed the heater core. , a hole for fixing the lever to the heater unit case is bored in the bilevel door lever that rotates the bilevel door, and an engagement hole that engages with a fitting for fixing the lever to the heater unit case side. An air conditioner for an automobile, characterized in that the mounting position of the lever on the rotating shaft is set at a position where the lever comes into contact with a heater unit case when the lever is reversed and mounted on the rotating shaft. heater unit.