JPS6146004Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an air conditioner for an automobile, and more particularly to an air conditioner for an automobile that is three-dimensionally miniaturized by shortening the overall length.

In general, air conditioners for automobiles are
As disclosed in Publication No. 129813, the air flow sent out from the blower fan flows almost linearly in the middle, and is finally bent in a predetermined direction before being blown out.

Such a linear air flow is adopted because it has low flow resistance, good mixing of cold and hot air, and is easy to perform temperature control.

However, it is difficult to introduce the above-mentioned air flow method in small vehicles or so-called front-wheel drive vehicles where an enlarged interior space is desired.

Especially in so-called front-wheel drive cars where the front wheels are driven by the engine, the driveshaft does not penetrate under the floor in the center of the car body, so the space in the center of the dash panel is large, and the engine compartment is usually installed horizontally, so The center front space of the darts panel also becomes wider. Therefore, in the case of a front-wheel drive vehicle, an automotive air conditioner that is short in overall length (in the longitudinal direction) and three-dimensionally compact can be installed in the center of the dash panel. When an automotive air conditioner is installed in the center of the dash panel, adopting a symmetrical air outlet structure can improve manufacturing costs and assembly workability, as well as ensure even air distribution throughout the passenger compartment. It will become a reality.

However, in order to obtain a compact automotive air conditioner with a short overall length, the air passage formed inside must be curved in a meandering manner. There is a risk that the flow will be biased toward one side wall of the road, and if such a biased flow occurs, problems will arise with air mixing, which mixes cold and hot air to a predetermined temperature, and with air distribution when blowing air in a predetermined direction. It turns out.

The present invention has been developed in view of the above-mentioned problems, and its purpose is to improve the air mixing performance and air distribution performance of a compact automotive air conditioner with short longitudinal dimensions.

In order to achieve the above object, the present invention includes a first slave door that guides the air passing through the detour air path to the air distribution chamber in a predetermined mode, and a differential duct that is provided symmetrically on both sides of the air distribution chamber. 2nd to control air volume
It is characterized by having a slave door.

With this configuration, the first slave door can smoothly guide the airflow passing through the detour air path to the air distribution room, and the second slave door can appropriately restrict the airflow passing through the differential duct, so that various modes can be used. This improves the air mixing performance and air distribution room, and also makes it easier to assemble both slave doors.

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

FIG. 1 is a diagram showing an embodiment in which an air conditioner for an automobile according to the present invention is installed in the center of a dash panel of a front-wheel drive vehicle. In FIG. 1, an air conditioner for an automobile is installed in the center of a dash panel DP of a front-wheel-drive vehicle so as to communicate the engine room ER side and the vehicle interior R, which are partitioned by the dash panel DP.

This air conditioner for an automobile includes an intake unit 1, a cooler unit 2, and a heater unit 3. The intake unit 1 is installed in the upper space in front of the dash panel DP in the engine room ER, and includes a case 1a containing a fan 5 driven by a motor 4. This case 1a has an inside air intake 6 that takes in circulating air (inside air) in the vehicle interior, an outside air intake 7 that takes in outside air, and a fan 5 that introduces air from either one or both of the inside air intakes 6 and 7. an A position for closing the air outlet 8 and the internal air intake 6;
It is provided with an intake door 9 that moves to a C position where the outside air intake port 7 is closed and an arbitrary intermediate B position between the two positions to adjust the intake amount of inside and outside air.

The cooler unit 2 is installed in the lower space in front of the dash panel DP in the engine room ER at a position vertically directly below the air outlet 8 of the intake unit 1, and is connected to a refrigerant conduit 11 constituting a cooling circuit.
The case 2a includes an evaporator 12 through which refrigerant from the intake unit 1 circulates and forms an air passage for cooling the air flowing down from the intake unit 1. This case 2a includes an inlet 10 connected to the outlet 8 of the intake unit 1, an outlet 13 for sending out cold air, and a bottom drain port 2b for condensed water.
It is oriented toward the interior of the vehicle, which is substantially perpendicular to the air outlet 13 and the air inlet 10.

The heater unit 3 is connected to the intake unit 1 on the rear surface of the dash panel DP in the vehicle interior R.
The hot water conduit 1 is installed so that it is almost directly facing the cooler unit 2 and the dash panel DP.
5 has a built-in heater core 16 through which engine cooling water is circulated, heats part or all of the cold air flowing in from the cooler unit 2, and distributes one or both of the cold air and warm air appropriately to the passenger compartment. A case 3a is provided to form an air passage.

This case 3a bypasses a suction port 14 connected to the air outlet 13 of the cooler unit 2, a current transformation slope 17 that is continuous with the suction port 14 and smoothly changes the direction of the flow of incoming air upward, and a heater core 16. A detour air passage 1 whose upper surface is gently curved at an almost right angle
8, an air distribution chamber 19 in contact with the detour air passage 18 and the air outlet surface of the heater core 16, and a pair of differential ducts 20 (symmetrical as shown in FIG. 2) for blowing out air along the inner surface of the windshield. (although only one is shown in Figure 1), a front floor duct 21a and a rear floor duct 21b (for blowing air out toward the footwells of the front and rear seats of the automobile). (only a portion of which is shown) and a vent duct 22 for sending air to a center ventilator (not shown) assembled to the instrument panel in front of the driver's seat. The pair of differential ducts 20 are provided on both sides of the air distribution chamber 19 as shown in FIG. 3, and extend upward from the lower end of the air distribution chamber 19 of the case 3a. is formed by bulging outward, and both differential ducts 2
There is no partition plate between 0 and 20 and the ventilation chamber 19. A pair of differential doors 28 (only one is shown in FIG. 1), a floor door 24, and a butterfly type vent door 27 are attached to these ducts so as to control air distribution to these ducts. Note that the differential duct opening 20a through which the differential door 28 opens and closes is opened and closed in a positional relationship that is substantially orthogonal to the vent duct opening 22a, and is opened at the top end of the differential duct 20 in FIG. A first slave door 25 and a second slave door 23, which will be described in detail later, are provided at the part where the detour passage 18 and the vent duct 22 diverge.

A mix door 26 is rotatably supported in front of the heater core 16 in the heater unit 3a, and the mix door 26 has a fully open position D where the air passage to the heater core 16 is fully opened (the bypass passage 18 is fully closed).
and fully open the air path to the heater core 16 (detour air path 1
The cooler unit 2
All of the cold air that has passed through the cooler unit 2 is sent to the air distribution chamber 19 through the heater core 16, or sent to the air distribution chamber 19 through the detour air path 18 that bypasses the heater core 16, or all of the air from the cooler unit 2 is A portion is passed through the heater core 16, and the remaining portion is sent to the ventilation chamber 19, bypassing the heater core 16.

As shown in FIG. 1, the case 3a of this heater unit 3 has the suction port 14 opened at a lower front position of the case 3a, and the air passage connected to the suction port 14 surrounds the heater core 16. Since it is formed in a U-shape, it is short in length in the front and rear directions and is also compact in size, so depending on the mode, sufficient consideration must be given to air distribution and air mixability. .

Therefore, in this embodiment, first and second slave doors 25 and 23 are provided that operate in conjunction with the floor door 24, and are particularly designed in a combined mode, such as a bilevel mode that cools the head and warms the feet, or a heat mode that blows warm air from the def duct and floor duct. etc.) and improves air mixing performance when in single mode.

The first and second slave doors 25, 23 are, as shown in FIG. 4, second slave doors 23, 23 attached to both sides of the first slave door 25.
In order to facilitate assembly, a support member 3 is fixed to the lower part of the vent duct 22 on the rear wall of the case 3a.
1, a circular shaft hole 32 is formed in both end plate portions of this support member 31, and the second slave doors 23, 23 are connected to this shaft hole 32.
A rotation shaft portion 3 is provided at the side end of the pair of second slave doors 3.
3 is provided protrudingly, and this rotating shaft portion 33 has a collar portion 34.
A journal portion 35 that rotatably fits into the shaft hole 32, a connecting portion 36 having a square cross section, and a screw hole 37 formed in the connecting portion 36 are formed. On the other hand, L-shaped arms 38 are provided at opposite ends of the first slave door 25, and the connecting portions 36 are provided at the lower ends of both arms 38.
A rectangular through hole 39 into which is fitted is bored. Both arms 38 have small holes 4 above the through holes 39.
0, and the floor door 24 of this small hole 40 and the first
It engages with one end of a link bar 41 for operating slave door 25 and second slave door 23 in a coordinated manner. The other end of the link bar 41 engages with a small hole 42 provided in the floor door 24, as shown in FIG.

To assemble the second slave door 23 and the first slave door 25, first, the two shaft holes 3 of the support member 31 are assembled.
After aligning the rectangular through holes 39, 39 of both arms 38, 38 of the first slave door 25 to the inside of the slave door 2, 32, respectively, the second slave door 23 is placed at right angles to the first slave door 25. The shaft portion 33 is inserted into the shaft hole 32 and the through hole 39, the journal portion 35 is fitted into the shaft hole 32, the connecting portion 32 is fitted into the through hole 39, and the bolt 43 is inserted into the screw hole 37.
Screw and secure.

In the above embodiment, the second slave door 23 and the first slave door 25 are connected by tightening bolts, but the connection structure is not limited to this, and the connection structure shown in FIGS. You can also use it as FIG. 5 shows that an enlarged part 44 in the shape of a truncated quadrangular pyramid is formed at the tip of the rotation shaft part 33, and on the other hand, if the enlarged part 44 is pushed into the rectangular through hole 39 of the arm 38 of the second slave door 25, the through hole will be opened. The four sides of 39 are slightly curved and then returned, allowing the slave door 23 to be connected to the support member 31 in a one-touch manner.

Next, the effect will be explained.

First, in the intake unit 1, depending on the state of the intake door 9, internal and external air is taken in from one or both of the intake ports 6 and 7 by the suction force of the fan 5, and this air is transferred to the air outlet 8, Air is blown to the cooler unit 2 through the suction port 10. In the cooler unit 2, this air flows down vertically and is cooled by the evaporator 12 when the cooling circuit is in operation, and is cooled by the air outlet 13.
leading to. Condensed water generated by this cooling drips directly below the evaporator 12 and is drained out of the vehicle through a drain port 2b formed at the bottom of the cooler unit case 2a. The cold air that has reached the outlet 13 flows into the heater unit 3 from the inlet 14. In the heater unit 3, first, the flow direction of the cold air is changed upward by the current changing slope 17. This cold air is distributed to both or one of the heater core 16 and the detour air path 18 depending on the state of the mixer door 26. The cold air passing through the heater core 16 is heated and becomes warm air, and reaches the air distribution chamber 19. The cold air passing through the detour air path 18 side maintains the same temperature state while flowing along the detour air path 18,
The direction is changed to almost a right angle and reaches the air distribution room 19.

Both or one of the cold air and hot air that has reached the air distribution room 19 is transmitted through each door 23, 24, 25, 27, 28.
The air is distributed and supplied to each duct 20, 21a, 21b, and 22 in the form of cold air, hot air, or a mixture of cold air and hot air, depending on the air distribution control based on the opening state of the ducts.

Air distribution from the various ducts in various mode settings will be explained.

First, when the outside air is hot and you want to quickly cool the room, set it to cooler mode. At this time, each door position is in the state shown in FIGS. 7A and 7B. That is, the floor door 24 is connected to the floor ducts 21a, 21
The differential door 28 is in the position to fully close the differential duct opening 20a, the vent door 27 is in the position to fully open the vent duct 22, the second slave door 23 is in the position to fully close the differential duct 20, and the first slave door 25 is in the position to fully close the differential duct 20a. Each duct 22 is placed in an open position. Therefore, all the air reaches the vent duct 22,
It is blown out from the ventilator into the passenger compartment. Here, since the base of the first slave door 25 is largely cut out as shown in FIG. 4, the warm air cannot be prevented from reaching the vent duct 22. Also,
The second slave door 23 also does not interfere with the air passing through the differential duct 22, but since the differential door 28 is in the closed position, the air passing through the differential duct 20 is directed from the differential duct 20 toward the vent duct 22 side.

In this way, the temperature of the air blown out from the vent duct 22 is adjusted by changing the opening degree of the mixer door 26 to adjust the amount of air passing through the heater core 16 and the amount of cold air bypassing the heater core 16, and by mixing the two. In this case, the hot air flowing toward the vent duct 22 through the base notch 25a of the first slave door 25 flows out toward the cold air that has flowed by bypassing the heater core 16. Therefore, even if the cold air flows unevenly, the air mixing property is good and comfortable cold air can be obtained.

Next, the bilevel mode is a mode for air conditioning to keep the head cold and the feet warm. In this mode, each door is in the state shown in FIGS. 8A and 8B. That is,
The mixer door 26, the floor door 24, and the vent door 27 are each in a half-open position, and the differential door 28 is in a closed state. Therefore, the hot air flows through floor duct 2.
1a, flows out through the rear floor duct 21b,
The cold air flows out from the vent duct 22.

Here, the first and second slave doors 25,
23 is operated in conjunction with the half-opening operation of the floor door 24, and is in the state shown in the figure. Therefore, the detour wind path 18
A portion of the cold air that has passed through the heater core 16 is restricted by the second slave door 23, reducing the amount of air that circulates downward through the differential duct 20, and the warm air that has passed through the heater core 16 is also restricted by the second slave door 23. The amount heading to the vent duct 22 will be limited,
This will improve air distribution when the head is cold and the feet are hot.

When heating the room, set it to heat mode.
In this case, the various doors are in the states shown in FIGS. 9A and 9B. That is, the floor door 24 and the differential door 28
is in the fully open position, and the vent door 27 is in the fully closed position.
The first and second slave doors 25 and 23 are also rotated by the floor door 24, the first slave door 25 closes the vent duct 22, and the second slave door 23 limits the opening degree of the differential duct 20.

Therefore, when the mixer door 26 is in the intermediate position shown in the figure to adjust the temperature of the blown air, part of the cold air will pass through the detour air passage 18 and the remaining cold air will pass through the heater core 16. Detour wind route 1
The cold air passing through 8 is restricted by the differential door 28, and the amount of the cold air flowing around to the differential duct 20 side is reduced. In addition, the warm air rising inside the differential duct 20 is also
There will be some limitations due to the slave door 23. Therefore, the amount of air blown out from the differential duct 20 is small, and most of the air is blown out from the front duct 21a, etc., and the air distribution during this heat mode is also improved.

Finally, when the windshield becomes foggy or has frost, set it to differential mode. In this case, as shown in FIGS. 10A and 10B, the differential door 28 is fully opened, the floor door 24 and the vent door 27 are fully closed, and all the air reaches the differential duct 20. At this time, the second slave door 23 and the first slave door 25 are in the position shown by the solid line in FIG. 1, and do not obstruct the flow of warm air.

In the above embodiment, a case has been described in which the automotive air conditioner according to the present invention is provided in the center of the dash panel of a front-wheel drive vehicle, but the present invention is not limited to this, and may be provided in the dash panel of a so-called FR vehicle that drives the rear wheels. You can also do it.

Further, although the above-described embodiment is an air conditioner for an automobile equipped with a cooler unit, it goes without saying that an air conditioner without a cooler unit may also be used. Furthermore, in the above-described system, the first and second slave doors 25, 23 are operated by the floor door 24, so there is no need to separately provide a drive mechanism for operating the slave doors. A separate device may be provided.

As is clear from the above explanation, since the differential duct of the heater unit and the second slave door that controls the wind leading to it and the first slave door that controls the detour air path are provided, Even if it is an air conditioner, there is no risk that the air mixing performance and air distribution performance will deteriorate when various modes are set.
The slave doors are arranged symmetrically and the first
The slave door is placed between the two first slave doors, and the two slave doors are configured to rotate together, making it easier to assemble multiple doors and simplifying the connection structure. This allows for proper air conditioning.

[Brief explanation of drawings]

FIG. 1 is a vertical sectional view showing one embodiment of the present invention, FIG. 2 is an external perspective view of the heater unit, FIG. 3 is a schematic sectional view taken along the line - in FIG. 1, and FIG. The figure is an exploded perspective view showing a connection structure between a differential door and a vent door, FIGS. 5 and 6 are enlarged partial sectional views and partial front views showing modified examples of the connection structure, and FIGS. Figures A and B are a vertical cross-sectional view schematically showing various door positions for each mode, and a cross-sectional view taken along line BB of the vertical cross-sectional view. 1...Intake unit, 2...Cooler unit, 3...Heater unit, 5...Fan, 1
2... Evaporator, 16... Heater core, 18
...Detour air path, 19...Air distribution room, 20...Diff duct, 21a...Floor duct, 21b...Rear floor duct, 22...Vent duct, 23...
Second slave door, 24...Floor duct, 25
...1st slave door, 26...Mitsuku door,
31... Supporting member, 32... Shaft hole, 34... Flange portion, 35... Journal portion, 36... Connection portion, 3
7...Screw hole, 38...Arm, ER...Engine room, R...Vehicle compartment, DP...Dutsche panel.

Claims (1)

[Scope of claims for utility model registration] 1 Intake unit 1 with built-in fan 5
The air taken in from the heater core 16 is introduced into the heater unit 3 having a built-in heater core 16, and a mixer door 26 installed in front of the heater core 16 is formed so that the introduced air bypasses the heater core side and around the heater core 16. A def duct 20 is connected to the curved portion of the detour air passage 18 by dividing the air into the U-shaped detour air passage 18 side at a desired ratio, mixing both types of air in the air distribution chamber 19.
Or the vent duct 22 or the air distribution room 19
A first slave door 25 that guides air passing through the detour air passage 18 to the air distribution chamber in a predetermined mode in an air conditioner for an automobile configured to blow into the vehicle interior from floor ducts 21a and 21b connected to the air conditioner. and a second slave door 23 for controlling the volume of air passing through a differential duct 20 provided symmetrically on both sides of the air distribution chamber 19. 2. The air conditioner for an automobile according to claim 1, which is connected to the first slave door 25 and the second slave door 23 so as to rotate integrally with each other.