JPS6332498Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field) The present invention relates to an air conditioner for an automobile, and particularly to an air conditioner for an automobile that has a shortened overall length and is three-dimensionally compact.

(Technical Background) Conventional air conditioners for automobiles consist of an intake unit that has a built-in fan to take in air, and a cooler unit that is adjacent to the intake unit and has a built-in evaporator to cool the intake air. (In this case, the intake unit and heater unit are connected by a duct.) The intake unit is connected to the cooler unit and has a built-in heater core to heat the cooling air and supply conditioned air into the passenger compartment. Although it is equipped with a heater unit that distributes air, it may cause air resistance, turbulence,
In order to prevent air from colliding with walls, each unit is connected to allow the air to travel as straight as possible.

However, in such a conventional air conditioner for an automobile, each unit is connected in a straight line, so there is a problem that the overall length becomes long.

(Problems with the prior art) Therefore, in a recently proposed system, the intake unit and the cooler unit are arranged one above the other, and the heater unit is provided at the rear of these units to make it three-dimensional and shorten the overall length. There is such an air conditioner for automobiles.

However, in order to shorten the overall length of this automotive air conditioner, the def ducts are formed vertically adjacent to both sides of the air distribution chamber in the heater unit.

Therefore, in the heat mode, the cold air from the detour air path flows directly from the upper part of the vertically extending def duct, and as shown in Figure 3A, the temperature characteristic curve of the air blown from the def duct becomes lower in temperature. As a result, a problem arises in that the windshield becomes foggy.

(Purpose of the invention) The present invention was made in view of the above-mentioned problems, and solves the problems by providing a guide plate that guides the warm air that has reached the air distribution room to the def duct as much as possible. It is intended to.

(Structure of the invention) In order to achieve such an objective, the present invention is installed so that in the case of heat mode, the floor duct is opened at a position where the floor door is raised so as to guide part of the air that has passed through the heater core upwards. On the other hand, the guide has a base end located at the tip position of the floor door in the upright state, extends upward, and is formed in a substantially U-shape having a rectangular notch in the center thereof. An air vehicle for an automobile, characterized in that a plate is provided adjacent to the floor door in an upright state, and the upright floor door and the guide plate cooperate to guide a part of the warm air to the differential duct side. It is a harmonizing device.

(Example) 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 car. In Figure 1, the automobile air conditioner is installed on the car's dashboard panel DP.
This panel is installed in the center of the engine compartment, sandwiching the engine room ER and vehicle compartment R.

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 space above the entire surface 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 the circulating air (inside air) in the vehicle interior, and an outside air intake 7 that takes in outside air.
, an air outlet 8 for sending out air from either or both of the inside and outside air intakes 6 and 7 by the fan 5, a position A where the inside air intake 6 is closed, a position C where the outside air intake 7 is closed, and The intake door 9 is provided with an intake door 9 that moves to an arbitrary intermediate position B between the two positions and adjusts the intake amount of inside and outside air.

The cooler unit 2 is installed vertically below the intake unit 1 in the space below the entire surface of the dash panel DP in the engine room ER, and includes an evaporator 12 in which the refrigerant from the refrigerant conduit 11 of the cooling circuit circulates, so that the refrigerant flows down from the intake unit 1. The air conditioner includes a case 2a that forms an air path for cooling incoming air. This case 2a
The intake port 10 is connected to the air outlet 8 of the intake unit 1, and the air outlet 13 is connected to the air outlet 8 of the intake unit 1.
and a bottom drainage port 2b for condensed water, and the blowout port 13 is oriented toward the interior of the vehicle at a substantially right angle to the suction port 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.
and a heater core 16, which is installed so as to face the cooler unit 2 and the panel DP almost directly, and through which engine cooling water is circulated through a hot water conduit 15.
The case 3a has a built-in case 3a that heats part or all of the cold air flowing in from the cooler unit 2 and forms an air path that appropriately distributes one or both of the cold air and the warm air into the passenger compartment. .

This case 3a includes a suction port 14 connected to the air outlet 13 of the cooler unit 2, and a suction port 14 connected to the air outlet 13 of the cooler unit 2.
an AC inclined surface 17 that is continuous with and smoothly changes the direction of the flow of incoming air upward; a detour air path 18 that detours around the heater core 16 and whose upper surface is gently curved at an approximately right angle; and the detour air path 18 and the heater core 16. an air distribution chamber 19 in contact with the air outlet surface of the windshield, and a pair of differential ducts 20 for blowing out air along the inner surface of the windshield (as will be described later with reference to FIG. 2, they are arranged symmetrically; (only one is shown in the figure), a front floor duct 21a and a rear floor duct 21b (only some of which are ) 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. A pair of differential doors 23 (only one shown), a floor door 24, and a vent door 25 are attached to these ducts so as to control air distribution to these ducts.

Heater core 16 inside heater unit case 3a
A mixer door 26 is rotatably supported on the front surface of the heater core 16, and the door 26 has a fully open position D where the air passage to the heater core 16 is fully opened (the detour air passage 18 is fully closed);
Moving to a fully closed position F, where the air passage to the heater core 16 is fully closed (the detour air passage 18 is fully opened), and a half-open position E, which is an arbitrary position between both positions and which opens both air passages. As a result, all of the cold air that has passed through the cooler unit 2 is routed through the heater core 16 to the air distribution chamber 19.
Alternatively, a part of the air from the cooler unit 2 is passed through the heater core 16, and the remaining part is sent to the air distribution chamber 19, bypassing the heater core 16.

A slave door 27 is installed at the connecting portion of the detour air passage 18 with the air distribution chamber 19 so as to move back and forth substantially along an extended arc of the upper curved surface of the detour air passage 18. The inflow direction of the cold air flowing from the detour air path 18 into the air distribution chamber 19 is changed according to the amount of advance and retreat. This door 27 is configured such that the slave door 27 increases its advance amount as the mix door 26 approaches the fully closed position D via the mix door 26 and a link mechanism 28. Note that since the differential door 23 is located on both sides of the slave door 27, it does not interfere with this door.

As shown in FIG. 2, the pair of differential ducts 2
0 is adjacent to both sides of the air distribution chamber 19 and is formed symmetrically by protruding the side walls of the heater unit case 3a outward, and the adjacent portions are all in communication with the air distribution chamber 19 (in the open state). )are doing. Therefore, the upper part of the def duct 20 is the air distribution chamber 19.
The detour air passage 18 which communicates with the air passage 18 is also in substantially adjacent communication with the detour air passage 18 . Therefore, the cold air from the detour air path 18 flows directly into the differential duct 20, and the temperature of the blown air tends to decrease, causing a fogging phenomenon on the windshield.

Therefore, in this embodiment, as shown in FIGS. 1 and 2, in the heat mode, the floor door 24 is
The floor ducts 21a, 2 are placed in an upright position so as to guide part of the air that has passed through the heater core 16 upward.
It is installed so that 1b is opened. Further, the base end is located at the distal end position of the floor door 24 in the upright state, extends upward from the base end, and has a substantially U-shaped notch 31 whose central part is cut into a rectangular shape. A guide plate 3 shaped like
2 is provided adjacent to the floor door 24 in the upright state. This guide plate 32 and the upright floor door 24 cooperate to guide a part of the warm air from the hot air outlet HO of the heater core 16 to the differential duct side, and the notch 31 allows the front floor duct 21a to be guided to the front floor duct 21a. Also, a part of the warm air from the hot air outlet HO is made to flow out to the rear floor duct 21b side.

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 using the suction force of the fan 5, and this air is transferred to the air outlet 8 and into the suction port using the blowing force of the fan. Air is blown to the cooler unit 2 through the port 10. In the cooler unit 2, this air is cooled by the evaporator 12 while flowing down vertically, and reaches the outlet 13. Drain water generated by this cooling drips directly below the evaporator 12 and is discharged to the outside 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 flows through the heater core 16 and the detour air path 1 depending on the state of the mixer door 26.
Air is distributed to both or one of 8. Heater core 1
The cold air passing through the 6 side is heated and becomes warm air, and reaches the air distribution room 19. The cold air passing through the detour air path 18 side flows along the detour air path 18 while maintaining the same temperature state, changes its direction almost at right angles, and flows into the air distribution room 19.
However, at this time, the blowing direction to the air distribution chamber 19 is adjusted depending on the state of the slave door 27 with respect to the detour air path 18.

Both or one of the cold air and hot air that has reached the air distribution room 19 remains cold air or warm air depending on the air distribution control based on the opening degree of each door 23, 24, 25.
Alternatively, cold air and hot air are mixed and distributed to each duct 20, 21a, 21b, 22 and supplied.

Here, when the heat mode is set, the floor door 24 and the differential door 23 are in an open state,
Conditioned air will be blown out from the floor ducts 21a, 21b and the differential duct 20, and it is desirable that the temperatures of the blown air from both of them be as high as possible. However, if the cold air from the detour air path 18 flows directly into the def duct 20, the temperature of the air blown out of the def duct 20 will drop.

In this embodiment, the warm air blown from the heater core 16 into the air distribution chamber 19 is
1 to the floor ducts 21a and 21b, but some of the warm air is passed through the floor door 24 and the guide plate 3.
2, and are guided by each of them and flow directly into the differential duct 20.

In this way, in this embodiment, warm air is sent to the differential duct 20, so the temperature of the air blown from the differential duct 20 increases, as shown in FIG. 3B, compared to the conventional case shown in FIG. 3A. Therefore, the temperature characteristic curve of the air blown from the def duct comes to approximate the temperature characteristic curve of the floor duct. Therefore, it is possible to prevent the windshield from becoming foggy.

Note that the shape, arrangement, etc. of the guide plate are not limited to the illustrated example, and may be of any type as long as it can catch the shortage of warm air in the differential duct. It goes without saying that the present invention can also be implemented in an air conditioner that does not include a cooler unit.

(Effects of the invention) As explained above, according to the invention, in the heat mode, the floor duct is opened in the position where the floor door is raised so as to guide part of the air that has passed through the heater core upward. While the floor door is installed as shown in FIG. A guide plate is provided adjacent to the floor door in the upright state, and the upright floor door and the guide plate work together to guide a portion of the warm air toward the differential duct. It is possible to prevent the wind temperature from decreasing.

[Brief explanation of drawings]

Figure 1 is a vertical cross-sectional view showing an embodiment of the present invention, Figure 2 is a cross-sectional view of Figure 1, and Figures 3A and B compare the conventional case and the embodiment of the present invention. FIG. 3 is a temperature characteristic diagram of each outlet air. 1...Intake unit, 2...Cooler unit, 3...Heater unit, 5...Fan, 1
6... Heater core, 18... Detour air path, 19...
Air distribution room, 20... Def duct, 21a, 21b...
...Floor duct, 22...Vent duct, 23...
... Differential door, 24 ... Floor door, 25 ... Vent door, 26 ... Mixture door, 27 ... Slave door, 31 ... Notch, 32 ... Guide plate.

Claims (1)

[Scope of utility model registration request] It has an intake unit with a built-in fan to take in air, a heater core that heats the air taken in from this intake unit, and a detour air path that curves around the heater core.
This detour air path is connected to a distribution chamber behind the hot air outlet of the heater core, and a def duct is formed adjacent to both sides of the distribution chamber, and a floor duct is connected to a lower part of the distribution chamber. In an automotive air conditioner equipped with a heated heater unit, when in heat mode, the floor door is installed in an upright position to open the floor duct so that part of the air that has passed through the heater core is guided upward. On the other hand, the guide has a base end located at the tip position of the floor door in the upright state, extends upward, and is formed in a substantially U-shape having a rectangular notch in the center thereof. An air vehicle for an automobile, characterized in that a plate is provided adjacent to the floor door in an upright state, and the upright floor door and the guide plate cooperate to guide a part of the warm air to the differential duct side. harmonization device.