JPH01114507A - Air conditioner for vehicle - Google Patents

Abstract

PURPOSE:To improve the performance of a defroster by forming a warm air bypass passage which communicates to the blow-out port of a differential gear onto a heater case and allowing the cold air in an air mixing chamber to flow into a bypass when a differential gear damper is half opened. CONSTITUTION:A differential gear damper 15 and an L-shaped heat damper 19 are in the state shown in the figure, in the heating mode or in the parallel using mode of heating and differential gear mode. Therefore, a portion of the warm air which passes through a heating core 10 flows into a differential gear blow-out port 13, passing through a bypass passage 17 as shown by the arrow (a). While, a portion of the cold air which flows into an air mixing chamber 11 flows into the warm air bypass passage 17 from the gap 20 between the differential gear damper 15 and a partitioning wall 18 as shown by the arrow (b), and is mixed with the warm air. Therefore, the temperature of the air blown out from the differential gear blow-out port 13 is lowered, and a proper temperature difference is formed for the blow-out temperature at the blow-out port of a heater. With such constitution, the performance of a defroster can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application J] The present invention relates to an air conditioner for an automobile, and more particularly to an air conditioner configured to properly control temperature-controlled air distributed to a differential zero star.

"Prior Art" Figures t113 and 4 are a front view and a side view showing an outline of a conventional automatic heavy-duty air conditioner. Inside the intake unit 1 are a motor-driven fan 2 and an evaporator 3.
is equipped, and the fan 2 is connected to the outside air inlet 4 or the inside air inlet 4.
Air flows in from ' and is sent to the evaporator 3. Reference numeral 5 denotes an inside/outside air switching damper, which takes in air from the interior of the vehicle through the inside air inlet 4' at the solid line position, and takes in outside air from the outside air inlet 4 at the dashed line position. The air that has been cooled and dehumidified while passing through the evaporator 3 flows into the heater case 6 through a fan-shaped open lower portion on the side surface of the heater case 6. An air mix damper 9 supported by a shaft 8 extending across the heater case 6 through the key point of the sector-shaped lower is disposed within the heater case 6;
The air mix damper 9 divides the air flowing in from the open lower lower part upward and downward at a rate according to the angular position, and the air divided downward is heated through the heater core 10 and then flows to the mixture chamber 11 as warm air. The air diverted upward flows directly into the air mix chamber 11 as cold air without being heated. (2) The warm air and cold air that have flowed into the amics chamber 11 are mixed here, but there is mainly hot air above and below the structure, and mainly cold air above. Therefore, warm air is discharged from the outlet 12 to the heater outlet provided below the heater case 6, and cold air is discharged from the outlet 13 provided above to the differential outlet. Furthermore, the fourth
In the figure, 14 is a heater damper provided at the outlet 12 to control the air flow to the heater outlet, 15 is a differential damper provided at the outlet 13 and controls the Jiffi to the differential outlet by υ11[l, and 16 is the vent outlet. This is a vent damper that controls the air volume.

"Problem to be Solved by the Invention J Since the conventional air conditioner is configured as described above, the air temperature at the heater outlet and the air temperature at the differential outlet exhibit the characteristics shown in FIG. Since the temperature at the air outlet is generally low, there is a problem in that dew condensation occurs on the windshield and the defroster performance is significantly reduced.

``Means for Solving the Problems'' The present invention aims to provide an air conditioner for an automobile that can relatively increase the temperature of air blown from a differential outlet compared to conventional devices in order to improve defroster performance. In the above conventional device, mJ passing through the heater core
! A hot air bypass passage is provided in the heater case that directly leads a portion of the IQffl to the outlet of the differential air outlet, and when the differential damper is in a semi-rAl state, a portion of the cold air in the air mix chamber is routed through the IQffl bypass at the tip of the differential damper. The differential damper is characterized in that the differential damper is configured and arranged so that a narrow gap is formed that flows into the passage.

"Function" The automotive air conditioner of the present invention has a warm air bypass passage and a differential damper configured and arranged as described above, and the differential damper is in a half-open state in the heat mode and the heat/def differential mode, and at this time, the air conditioner is in a half-open state. The cold air in the mix chamber is squeezed through a narrow gap formed at the tip of the differential damper and flows into the hot air bypass passage. A small amount of cold air flowing into the hot air bypass passage is mixed with warm air flowing in the hot air bypass passage toward the differential air outlet, and this Wffl is sent to the differential air outlet as a moderate temperature ]i. Therefore, the temperature at the defroster outlet reaches an upper limit as shown by the broken line in FIG. 5, and the defroster performance is significantly improved.

Embodiment FIG. 1 is a side view showing a schematic structure inside a heater case according to an embodiment of the present invention. Inside the heater case 6, as in the conventional case, an air mix damper 9, a heater core 10, a heater damper 14, In addition to the differential damper 15 and pend damper 16, a warm air bypass passage 17 is formed on the right side of the air mix damper 9 and heater core 10 in the figure.

That is, inside the heater case 6, there is a partition wall 18 extending along the right side surface of the heater core 1o and the arcuate outer edge of the inter-sector lower.
A hot air bypass passage 17 is formed in the space between the partition wall 18 and the right inner wall of the heater case 6. An L-shaped heat damper 19 is disposed at the entrance of the hot air bypass passage 17. The rotation axis of the differential damper 15 is moved to the left side in the drawing of the outlet 13 to the differential air outlet, so that the narrowest gap 20 is formed between its tip and the partition wall 18 when it is in the half-open state shown in the figure. Placed.

In the present invention, the warm air bypass passage 17 and the differential damper 15 are arranged as described above, and the differential damper 15 and the L-shaped heat damper 1 are arranged in the heat mode and the heat/def differential mode.
9 is located at the position shown in the figure, a portion of the warm air passing through the heater core 10 is directed to the L-shaped heat damper 1 as shown by arrow a.
9 and flows into the lff1 bypass passage 17 and flows to the outlet 13 to the differential air outlet. On the other hand, the cold air that has flowed into the air mix chamber 11 without passing through the heater core 10 is partially connected to the differential damper 15 and the partition W as shown by the arrow.
I! 18 through the gap 20 between the hot air bypass passage 1
7 and mixes with the warm air flowing through the same passage, the hot air is slightly cooled, and the warm air at an appropriate temperature is sent to the differential air outlet. Therefore, the warm air blown out from the defroster outlet has an appropriate temperature difference with respect to the warm air blown out from the heater outlet, and the defroster performance can be significantly improved.

In the differential mode, the differential damper 15 is fully opened and the gap 20 is enlarged, so human air is sent from the air mix chamber 11 to the differential outlet.
4 is closed, and the air in the F-mix chamber 11 is a mixture of hot air and cold air separated by the air mix damper 9, and therefore is not low enough to cause dew condensation on the window glass.

The L-shaped heat damper 19 is connected to the air mix damper 9 and I!
Preferably, the working air mix damper 9 is configured to open the bypass passage 17 when set at the highest temperature such that all incoming air passes through the heater core 10. At this time, the warm air in the air mix chamber 11 is sent to the differential air outlet through the gap 20 of the differential damper 15.

Note that the damper installed at the entrance of the hot air bypass passage 17 is not limited to an L-shaped one. As shown in FIG. 2, it may be a flat tamper 19'.

Effects of the Invention The present invention provides a hot air bypass passage that guides a portion of the hot air that has passed through the heater core to the differential air outlet, and further bypasses the cold air from the air mix chamber through the narrow gap that is created at the tip of the differential damper in the half-open state. Since it is mixed with the warm air in the aisle, warm air at an appropriate temperature is blown out from the differential air outlet during heat mode and heat/def differential mode, which prevents condensation on the windshield and significantly improves defrosting performance. You can force it.

[Brief explanation of the drawing]

FIG. 1 is a side view schematically showing the internal structure of a heater case according to an embodiment of the present invention. Figure 2 shows the first model, which differs only in the structure of the heat damper placed at the entrance of the hot air bypass passage.
It is a drawing similar to the figure. FIG. 3 is a front view showing an outline of a conventional air conditioner for an automobile, and FIG. 4 is a side view showing the IPI essentials of the internal structure of the heater case portion. FIG. 5 is a dimensional characteristic diagram showing the state of the air outlet temperatures of the heater air outlet and the differential air outlet. 3... Everbore, 6... Heater case, 7...
・Fan-shaped opening, 9...Air mix damper, 10...
Heater core, 11...Air mix chamber, 12.
...Exit to heater outlet, 13...Exit to differential outlet, 14...Heater damper, 15...Diff damper, 16...Vent damper,
17... Hot air bypass passage, 18... Partition wall, 1
9.19'...Heat damper, 20...Gap.

Claims (2)

[Claims] (1) An air mix damper that is rotatably supported in the heater case and divides the cold air that passes through the evaporator and is guided into the heater case into a flow that passes through the heater core and a flow that bypasses the heater core; A heater damper is arranged at the outlet of the heater case to the outlet and mainly controls the flow of hot air passing through the heater core and heading towards the heater outlet, and a heater damper is arranged at the outlet of the heater case to the differential outlet and mainly bypasses the heater core and goes to the differential outlet. In an air conditioner for an automobile having a differential damper that controls the flow of cold air, a warm air bypass passage is provided that guides a portion of the warm air that has passed through the heater core to the outlet to the differential air outlet, and the differential damper is in a half-open state. An air conditioner characterized in that the air conditioner is configured and arranged so that a narrow gap is formed at the tip thereof through which a part of the cold air that has bypassed the heater core flows into the warm air bypass passage. (2) The warm air bypass passage is formed between an arc drawn by the tip of the air mix damper, a partition wall formed along the side surface of the heater core, and an inner wall of the heater case, and the differential damper has its tip connected to the partition wall. 2. The air conditioner according to claim 1, wherein the air conditioner is arranged so that the gap between the air conditioner and the partition wall is the narrowest when the air conditioner faces the partition wall and is in a half-open state. (3) A heat damper is provided for opening and closing the hot air bypass passage, and the heat damper works in conjunction with the air mix damper to close the hot air bypass passage when the air mix damper is set at a maximum temperature. An air conditioner according to claims 1 and 2, characterized in that: