JPS6228488Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an air conditioner for an automobile that performs ventilation and heating of a vehicle interior, prevents fogging of window glass, etc.

Conventionally, in this type of air conditioner, a heater is placed inside the case, and an air mix damper controls the proportion of air that passes through the heater, mixing the warm air that passes through the heater with the cold air that does not pass through the heater. After that, the air is blown out from each air outlet formed in the branch box. However, the proportion of cold and hot air in the wake of the heater is not always sufficient, especially because the cephalothoracic outlet that blows out cold air opens above the foot outlet that blows out warm air. Generally, the top of the branch box is designed to allow cold air to flow through it. Therefore, it has been difficult to send out sufficient warm air to the defroster outlet, which is opened and communicated with the upper surface of the branch box and blows out warm air toward the window glass. In other words, the defroster outlet may not be able to blow out sufficiently warm air, and it may take a long time to prevent the window glass from fogging up, or the temperature difference between the warm air and the warm air blown out from the footwell outlet may become large. This caused the problem of worsening the air conditioning feeling given to the passengers.

The present invention was devised in view of the above points, and an object of the present invention is to enable air at an appropriate temperature to be blown out from a defroster outlet.

In order to achieve the above object, the present invention includes a case forming a ventilation passage, a heater disposed inside the case to heat the air, and a proportion of the air in the case that passes through the heater. an air mix damper that is arranged on the downstream side of the heater in the case, and has a defroster outlet in the upper part, a cephalothorax outlet in the side part, and a foot outlet in the lower part. A branch box that is opened, an air outlet switching damper that is installed in the branch box and opens and closes each of the air outlets; a guide plate forming a passage leading to the defroster outlet, and when the outlet switching damper opens the defroster outlet, air in the center of the branch box passes through the passage provided by the guide plate to the defroster outlet. Adopt a technical means of configuring it so that it flows to the side.

An embodiment of the present invention will be described below based on the drawings. In FIG. 1, reference numeral 1 denotes an electric blower that sucks either vehicle interior air or vehicle exterior air selected by an inside/outside air switching damper (not shown). 2 is a casing of this blower 1, and 3 is a case of an air conditioner connected to this blower casing 2, which forms a passage for the air sent out from the blower 1.
4 is an evaporator disposed within the case 3 to cool the air; 5 is a heater disposed downstream of the evaporator 4 within the case 3; this heater is used to introduce cooling water for an automobile engine (not shown); This heats the air by exchanging heat with the air inside the case 3. Two air mix dampers 6 are rotatably disposed on the front and rear surfaces of the heater 5 to control the temperature of the blown air by adjusting the proportion of air passing through the heater 5. The two air mix dampers 6 are connected to each other so as to be interlocked, and receive movement of a temperature control lever of an air conditioner control panel (not shown) disposed inside the vehicle via an operating wire or the like.
The damper opening degree is controlled.

When the air mix damper 6 is operated to the intermediate opening position shown by the broken line in FIG. These two flows are designed to mix on the side, but this mixing is not completed until the temperature distribution becomes uniform, and on the downstream side of the heater 5, the flow that passes through the heater 5 mainly flows in the center. The latter hot air flows, and the cold air that does not pass through the heater 5 flows through the upper and lower ends, especially the upper part. Here, the cold air that does not pass through the heater 5 also flows in the lower part on the downstream side of the heater 5, but the warm air after passing through the heater 5 flows toward this lower part, so the ratio of cold air in the lower part is It is very small, and only cold air flows in the upper part.

Reference numeral 7 denotes a branch box connected to the downstream side of the case 3. As shown in Fig. 2, a defroster outlet 8 is opened on the top surface of the branch box 7 to blow hot air toward the window glass of the car. In addition, a cephalothorax air outlet 9 is opened on the side of the branch box 7 to blow cold air toward the occupant's head and thorax, and a cephalothorax air outlet 9 is opened on the bottom surface of the branch box 7 to blow warm air toward the occupant's feet. The foot air outlet 10 is open. Reference numeral 11 denotes a first air outlet switching damper disposed in the branch box 7 for opening and closing the cephalothoracic air outlet 9 and the foot air outlet 10, and is rotatably provided around the shaft 11a. Reference numeral 12 designates a second outlet switching damper which is also disposed within the branch box 7 and opens and closes the defroster outlet 8, and is rotatably provided around the shaft 12a. The first and second outlet switching dampers 11 and 12 move in conjunction with each other by a link mechanism (not shown), and control the movement of the mode switching lever provided on the air conditioner control panel inside the vehicle via an operating wire or the like. It is now possible to control opening and closing. Reference numeral 13 denotes a resin guide plate, which is provided in the branching box 7 behind the cephalothoracic outlet 9 and at a position where it does not interfere with the rotation of the first and second dampers 11 and 12, and is located on the branching box wall. A passage 13a is formed between the two. Note that this passage 13a has openings at the top and bottom. Therefore, when the second outlet switching damper 12 opens the defroster outlet 8, the air in the center of the branch box can be introduced into the defroster outlet 8 through the passage 13a. Note that the guide plate 13 is formed into an L-shape as shown in FIG. 3, and is fixed to the inner wall surface of the branch box 7 by heat welding, screw tightening, or the like. Bent portion 1 of guide plate 13
3b serves to prevent the cold air from the upper part of the branch box 7 from flowing directly into the passage 13a.

Next, the operation of the apparatus of this embodiment with the above configuration will be explained. First, when cooling the vehicle interior in summer or the like, the evaporator 4 is activated, the heater 5 is deactivated, and the air mix damper 6 is connected to the heater 5 as shown by the dashed line in FIG. When it is operated to the closed position, the cold air cooled by the evaporator 4 bypasses the upper and lower parts of the heater 5 and flows into the branch box 7. As shown in FIG. 4, the outlet switching dampers 11 and 12 are connected to the defroster outlet 8 and the foot outlet 1.
0 and open the cephalothorax air outlet 9. Therefore, in this case, the cold air A is blown out from the air outlet 9 toward the head and thorax of the occupant. However,
Even during this cooling process, if the inside of the vehicle becomes too cold, the heater 5 is activated and the air mix damper 6 is slightly opened to mix the warm air that has passed through the heater 5 into the cold air. By doing so, the temperature of the cold air blown out from the outlet 9 can be adjusted to a desired temperature.

When you want to get a feeling of cold head and warm feet in spring, autumn, etc., both the evaporator 4 and the heater 5 are operated, and the air mix damper 6 is used to control a part of the air flow, as shown by the broken line in Fig. 1. Only heater 5
The intermediate opening position is such that a mixed flow of cold air and hot air is directed toward the branch box 7. As shown in FIG. 5, the first outlet switching damper 11 opens both the cephalothorax and foot outlets 9 and 10, and the second outlet switching damper 12 slightly opens the defroster outlet 8. Let it open. and,
In this case, since the cephalothorax outlet 9 opens above the foot outlet 10, mainly cold air A that does not pass through the heater 5 flows into the cephalothorax outlet 9. Some warm air B is mixed in. Therefore, the cold and hot mixed air C, which is mainly composed of cold air, is blown out from the air outlet 9. On the other hand, the warm air B that has passed through the heater 5 mainly flows into the foot outlet 10, and some of the cold air A is mixed into this, so the air outlet 10 emits a cold and hot mixed air mainly composed of warm air. D bursts out. Further, the warm air B from the center of the branch box 7 is supplied to the defroster outlet 8 through the passage 13a, and some of the cold air A is mixed into this, and the cold and hot mixed air E is blown out toward the window glass. Ru.

Also, during heating in winter, etc., the evaporator 4 is deactivated, the heater 5 is activated, and the air mix damper 6 is operated to the position shown by the solid line in FIG.
Make sure that all the blown air flows into the heater 5. This allows warm air to flow through the branch box 7. In addition, the outlet switching dampers 11 and 12 are
As shown in FIG. 6, close the cephalothoracic air outlet 9,
The foot air outlet 10 is fully opened, and the defroster air outlet 8 is half opened. Therefore, in this case, hot air is blown out from the foot air outlet 10 and the defroster air outlet 8, and the amount of air is larger at the foot air outlet 10 at a ratio of about 7:3.

To control the heating temperature during heating, the air mix damper 6 is moved to the side of the broken line in Figure 1, and the cold air A that does not pass through the heater 5 is sent into the branch box 7. However, as shown in FIG. 6, the defroster outlet 8 has a passage 13.
Since the warm air B from the center of the branch box 7 is sent through the outlet a, there is no large difference in the blowout temperature between the footwell outlet 10 and the defroster outlet 8.

Further, in order to further increase the air volume from the defroster outlet 8, the second outlet switching damper 12 is rotated clockwise to fully open the defroster outlet 8, as shown in FIG. In this case, the second air outlet switching damper 12 partially covers the foot air outlet 10, so the ratio of air volume between the defroster air outlet 8 and the foot air outlet 10 is approximately 7:3. There will be more exits 8.

In the above example, the heater 5 is installed in the center of the case 3, but the heater 5 may be installed in the lower part of the case 3 as shown in FIG. However, in any case, the cephalothoracic outlet 9 is generally provided above the foot outlet 10, so that the main flow of warm air is located below the center in the case 3 downstream of the heater 5. It is desirable to install the heater 5 so that a suitable temperature distribution can be obtained.

Further, in the above-mentioned embodiment, the guide plate 13 is provided behind the cephalothoracic outlet 9 in the branch box 7, but due to space restrictions for vehicle mounting, etc. In some cases, it may be difficult to provide the guide plate 13 on the rear side of the cephalothorax air outlet 9, and in such a case, the guide plate 13 may be provided on the side of the cephalothorax air outlet 9.

Further, in the above-mentioned embodiment, the evaporator 4 is provided in the case 3.
However, the evaporator 4 may not be provided in devices that do not require cooling operation, such as air conditioners for cold regions.

As explained above, in the air conditioner of the present invention, the guide plate 13 is provided inside the branch box 7, and the guide plate 13
Since the air from the center of the box can be introduced into the defroster outlet 8 through the passage 13a formed by the passage 13a, the warm air with a not-so-large temperature difference from the warm air blown out from the foot outlet 10 during heating is transferred to the defroster outlet. 8, thereby
It has the excellent effect of preventing the window glass from fogging extremely well, and also improving the air conditioning feeling for the occupants by reducing the difference in temperature between the upper and lower sides.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing an embodiment of the air conditioner of the present invention, Fig. 2 is a sectional view taken along the line A-A in Fig. 1, Fig. 3 is a perspective view of the guide plate 13, and Figs. Each figure is a sectional view showing the switching state of the outlet switching damper, and FIG. 8 is a sectional view showing another embodiment of the present invention. 3... Case, 5... Heater, 6... Air mix damper, 7... Branch box, 8... Defroster outlet, 9...
Air outlet for head and thorax, 10... Air outlet for feet, 11... First air outlet switching damper, 12... Second air outlet switching damper, 13... Guide plate, 13a... Passage.

Claims (1)

[Claim for Utility Model Registration] A case forming a ventilation passage, a heater disposed in the case to heat the air, and a proportion of the air inside the case that passes through the heater. an air mix damper to be adjusted; and an air mix damper disposed on the downstream side of the heater of the case, with a defroster outlet in the upper part, a cephalothorax outlet in the side part, and a foot outlet in the lower part. an open branching box; an outlet switching damper disposed within the branching box for opening and closing each of the outlets; and an outlet switching damper disposed within the branching box that directs warm air heated by the heater to the defroster. a guide plate forming a passage leading to the air outlet, and when the air outlet switching damper opens the defroster air outlet, air in the center of the branch box passes through the passage formed by the guide plate to the defroster air outlet side. An air conditioner for an automobile, characterized in that the air conditioner is configured to allow air to flow into the air.