JPS5832977Y2 - Automotive air conditioning system - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a heating and cooling system for automobiles.

In the conventional automotive air conditioning system, as shown in FIG. The warm air is guided to the heater core 9 and heated by the operation of the temperature control damper 11 in the air mix chamber 5 downstream of the resistance plates 13 and 14, and the hot air and the cold air from the cold air bypass passage are throttled.
The air is introduced into the interior of the air tank and mixed with each other, and air is blown from the defroster outlet 6, the vent lower outlet, or the heater outlet 8 as required.

In such a conventional automotive air conditioning system, the throttle resistance plates 13 and 14 are provided to control the air temperature and mix hot air and cold air. By providing this, the ventilation resistance inside the heater unit 1 becomes extremely large.
This caused problems such as a decrease in air volume and the need to increase the capacity of the proa 2.

The present invention was made to solve the problems of the prior art described above, and functions as a resistor for temperature control only when necessary, and does not provide any resistance when mixing hot air and cold air is not required. It is an object of the present invention to provide a cooling/heating device for an automobile that can obtain a large air volume capacity and also improve the mixing properties of cold and hot air.

In order to achieve this objective, the automotive air conditioning system according to the present invention includes a temperature control damper distributing and controlling the airflow between the heater core side and the cold air bypass passage side in the heater unit, and The present invention is characterized in that a sub-damper is provided, which is pivotally mounted at a position within the heater unit that faces the heater core, and is capable of partially blocking the cold air bypass passage.

Hereinafter, the present invention will be further explained according to embodiments shown in the drawings.

2 and 3 are a sectional view and a plan view, respectively, showing one embodiment of the automotive air conditioning system according to the present invention.
Partial casings or members corresponding to those of the conventional example shown in the figures are given the same reference numerals.

In this embodiment, an air flow supplied in the direction of the arrow from the proar motor 3 driven by the proar motor 3 is sent into the heater unit 1 via the evaporator 4 .

The air sent into the heater unit 1 is passed through the temperature control damper 11 to the side of the heater core 9 located on the lower side of the figure, and to the cold air bypass passage 10 located on the upper side of the figure.
After being mixed in the air mix chamber 5 on the downstream side as hot air or cold air, the defroster outlet 6 has a damper 6A and a vent has a damper TA as necessary. Blowout lower, damper 8
It is sent out through either heater outlet 8 having A.

As is clear from FIGS. 1 and 2, in this embodiment, the heater core 9 is placed diagonally above the heater core 9.
A sub-damper 12 is provided at a position facing the downstream upper end of the damper 12 .

As can be seen from FIG. 2, this sub-damper 12 is attached to a part in the axial direction of a sub-damper shaft 12A provided parallel to the temperature control damper shaft 11A for the temperature control damper 11. In conjunction with this, the cold air bypass passage 10 can be operated to open and close as shown by the arrows in FIG.

The interlocking relationship between the temperature control damper 11 and the sub-damper 12 will be explained with reference to FIGS. 4 and 5.

The state shown in FIG. 4 of the housing is a cooling state, and the temperature control damper 11 is in a state where the inlet side of the heater core 90 is fully closed, while the damper 12 is pulled up so as to be in contact with the inner wall surface of the heater unit 1, and the cold air bypass passage is closed. is fully opened.

Therefore, in this state, all the air supplied from the blower 2 passes through the cold air bypass passage 10 and flows toward the air square chamber 5.

Next, when heating is required, as shown in FIG. 5, the temperature control damper 11 is pulled up in the direction of the arrow (upward) from the state shown in FIG. 1 to close, while damper 1
2 similarly moves as shown by the arrow in FIG. 4 and comes to a position approximately perpendicular to the inner wall surface of the heater unit 1.

Therefore, in this state, almost all of the air supplied from the blower 2 passes through the heater core 9, is heated, becomes warm air, and flows toward the air chamber 5, and the warm air heats the vehicle. become.

In this embodiment, a sub-damper 12 is provided in addition to the temperature control damper 11, so that in the state shown in FIG. The air that has passed through the heater core 9 becomes hot air, while the air that has passed through the cold air bypass passage 10 is supplied to the downstream side of the cold air 11, and the air that has passed through the heater core 9 becomes hot air. 5 and mixed with each other.

In that case, due to the action of the sub-damper 120, the sub-damper 1
A low-pressure region is formed downstream of the heater core 9, and the warm air that has passed through the heater core 9 is directed to the sub-damper 12 as shown by the arrow in FIG.
The air flows toward the low-pressure region of the sub-damper 12, joins the cold air sent through the cold air bypass passage 10 at an angle of approximately 90 degrees on the downstream side of the sub-damper 12, and is mixed extremely efficiently.

In this case, in this embodiment, the tip side of the sub-damper 12 has a bent portion 12B bent into a substantially L-shape, so that this bent portion 12B is located downstream of the heater core 9 as shown in FIG. When the bending portion 12B is located at a position facing the upper end, the adjacent area between the bent portion 12B and the heater core 9 becomes larger, so that the effect of mixing hot air and cold air by the sub-damper 12 is further improved.

Moreover, by providing such a bending portion 12B,
Another advantage is that the sub-damper 12 closes the cold air bypass passage 10 more quickly.

However, the dimensions of the bent portion 12B should be such that, for example, the bent portion 12B is not too thick as a resistance to the cold air bypass passage 10 when the sub-damper 12 is in the state shown in FIG. This is desirable.

FIG. 6 is a diagram showing various embodiments of the sub-damper 12.

As shown in these embodiments, the sub-damper 12 controls opening and closing of only a part of the cold-air bypass passage 10, and in the case of FIG. 6A, the sub-damper 12 is provided at the right end in the width direction of the cold-air bypass passage 10. In the case of FIG. 6B, the damper is provided at approximately the center in the width direction, and in the case of FIG. .

FIG. 7 shows still another embodiment of the present invention, in which a single diaphragm resistance plate 15 is formed downstream of the heater core 9. As shown in FIG.

This throttling resistance plate 15 is a guide plate for further promoting the mixing action of hot air and cold air, and in the case of this embodiment, the throttling resistance plate is not provided from both the upper and lower sides as in the conventional case.
Since the sup damper 12 is provided above the throttle resistance plate 15, the throttle resistance plate 15 does not obstruct the air path when the cold air passes through.

FIG. 8 shows still another embodiment of the present invention, in which two restrictive resistance plates 16 and 17 are provided on the downstream side of the heater core 9 in a staggered manner.

These throttle resistance plates 16 and 17 also allow the hot air coming out of the heater core 9 to pass through the cold air bypass passage 1 in the same way as the throttle resistance plate 15.
This is a guide plate to assist in better mixing with the cold air on the 0 side.

Also in this embodiment, there is no fear that the throttle resistance plates 16 and 17 will reduce the amount of cold air during cooling.

FIG. 9 shows a comparison of the performance of the present invention and a conventional example, in which FIG. 9A shows the conventional example without a sub-damper, and FIG. 9B shows the present invention.

As is clear from this figure, according to the present invention, extremely good temperature controllability can be obtained.

In the above embodiment, the temperature controller damper 11 and the sub-damper 12 are entirely interlocked, but the dampers 11 and 12 may be partially interlocked or may be operated in an ON-OFF manner. It is also possible to control the temperature by operating the sub-damper 12 only within a certain operating range of the temperature control damper 11.

As explained above, according to the present invention, by making the sub-damper function as a resistance plate only during temperature control and not acting as a resistance at other times, it is possible to obtain good temperature control performance, and to improve cooling performance. It is possible to greatly increase the maximum air volume at a time, and furthermore, by the function of the sub-damper, it is possible to mix hot air and cold air more reliably.

[Brief explanation of drawings]

Figure 1 is a schematic cross-sectional view showing a conventional automotive air conditioning system;
Fig. 2 is a schematic cross-sectional view showing one embodiment of the automotive air conditioning system according to the present invention, Fig. 3 is a plan view thereof, and Figs. 4 and 5 are partial cross-sections showing the operating conditions of the temperature control damper and sub-damper, respectively. Figures 6A-C are diagrams showing an example of a sub-damper used in the present invention, Figures 1A and B are schematic cross-sectional views showing other embodiments of the present invention, and their views taken along the line ■-■. Figures 8A and B are schematic cross-sectional views showing other embodiments of the present invention and their views taken along the line ■-■, and Figures 9A and B compare the performance of the conventional example and the present invention, respectively. FIG. 1... Heater unit, 2... Proa, 5... Air mix chamber, 9...
・Heater core, 10...Cold air bypass passage, 1
1...Temperature control damper, 1-2...
...Sub damper, 15,16,17...Aperture resistance plate.

Claims (1)

[Scope of utility model registration request] A temperature control damper is provided in the heater unit to distribute and control the air flow to the heater core side and the cold air bypass passage side, and is provided at a position facing the heater core on the cold air bypass passage side and is interlocked with the control damper and controls the cold air flow. A heating and cooling system for an automobile that includes a sub-damper that can open and close a bypass passage, and a bent portion at the tip of the sub-damper.