JPS6327202B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to improvements in air conditioners for automobiles.

Conventionally, this type of air conditioner has a blower, evaporator, heater core, etc. housed inside the casing.
A plurality of air outlets were provided at the outlet ends of these air passages, and a vent damper, a defroster damper, a heat damper, etc. were attached to these outlets depending on their roles. As described above, conventional air conditioners for automobiles are equipped with many dampers for switching the air outlet, so the devices for opening and closing these dampers are complicated, and the structure has the disadvantage that it cannot be made more compact. In addition, in many cases, a plate-shaped damper is used, which has the disadvantage of poor sealing properties of the damper.

In addition, in the prior art, there was a rotary damper that was used as a mode switching damper, but
When the mode switching damper is rotated, the temperature of the blown air changes each time, and in order to keep it constant, it is necessary to readjust the heater passage switching damper each time the mode switching damper is rotated.
It was extremely time consuming to adjust.

Therefore, an object of the present invention is to reduce the number of dampers and parts, thereby making it possible to reduce the size of the damper and reduce costs. To provide an air conditioner for an automobile in which the temperature of the blown air is constant even when the air conditioner is rotated, and therefore adjustment can be performed satisfactorily.

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 schematically shows the entire automotive air conditioner according to the present invention. Air outside the cabin or air inside the cabin is introduced into the upstream end of the casing 1, which includes the evaporator 3 as a cooler core, through an inside/outside air switching box (not shown). In addition, a case 1 including a mode switching damper etc. is provided at the downstream end of the casing 1.
0 is fixed. Although FIG. 1 shows an air conditioner that is equipped with an evaporator and has a cooling function, it goes without saying that the present invention can also be applied to an air conditioner that does not have an evaporator and has only a heating function.

As shown in FIGS. 2 and 3, the air conditioner according to the present invention includes a cylindrical case 10, and a heat outlet 11, a defroster outlet 12, and a vent outlet 13 are provided on the circumferential surface of the case 10. It is equipped. The outlets are preferably arranged at equal intervals of 120 degrees as shown. A substantially semi-cylindrical heater core 14 is fixed preferably concentrically inside the case 10, and further includes a partially cylindrical blow-out mode switching damper 15 provided close to the inside of the case 10. As shown in the figure, this mode switching damper 15 is usually a partial cylinder larger than a semi-cylindrical shape, and is mounted so as to be rotatable along the case 10, and its angular position can be adjusted by an operating handle 16. It is configured as follows.

A partially cylindrical air mix damper 17 is rotatably provided inside and close to the heater core 14, and its angular position can be adjusted by an operating handle 18 connected thereto. There is.

The center part of the inner end surface 19 of the case 10 is an air inlet 20 that communicates with the outlet side passage of the evaporator 3 shown in FIG. The water is introduced from the inside of the case 10 and flows radially outward within the case 10. In addition, the end surface 21 of the case
The sealing can also be performed by the end wall 22 of the mode switching damper 15. Regarding the two operating handles 16 and 18, for example, the operating handle 16
be a hollow shaft, and the other operating handle 18
If you pass it through it, you can put the operating parts together on one side. Reference numerals 4 and 5 in FIG. 3 indicate an inflow pipe and an outflow pipe for a heat medium such as cooling water that has passed through the automobile engine and been heated.

During operation, air that has passed through the casing 1 flows axially inside the heater core 14 from the inlet 20 of the case 10, enters the case 10, flows radially outward, and exits from each outlet. The temperature of the blown air is adjusted by rotating the rotary air mix damper 17 using the operation handle 18, and adjusting the amount of air that is heated through the heater core 14 (i.e., the amount of hot air) and the amount of air that does not pass through it and is not heated ( In other words, this is done by changing the ratio of the amount of cold air.

The selection of the outlet is made by moving the rotary mode switching damper 15 using the operation handle 16, thereby obtaining the respective outlet modes shown in FIGS. 4 to 7. That is, as shown in FIGS. 2 and 4, when the mode switching damper 15 covers the heat outlet 11 and the defroster outlet 12 and the vent outlet 13 is open, air flows out only from the vent outlet 13. and vent mode is obtained. In this case, if the air is cooled by the evaporator 3, the mode becomes a cooler mode. Furthermore, if the air mix damper 17 is adjusted and set, for example, to the position indicated by the two-dot chain line in FIG. Warm air flows out. When the mode switching damper 15 is rotated slightly clockwise from the state shown in FIG. 4, as shown in FIG. Heat outlet 11
Air is blown upward and downward into the vehicle interior from both the vent outlet 13 and the vent outlet 13, thereby providing a bilevel mode. Further, the mode switching damper 15 is further rotated clockwise from the state shown in FIG. 5 to cover the vent outlet 13 and the heat outlet 11 as shown in FIG.
When the defroster is fully opened and the defroster outlet 12 is slightly opened, the heat mode is activated. Furthermore, by rotating the mode switching damper 15 clockwise from the state shown in FIG. 6, most of the A so-called defroster mode is obtained in which air flows through the defroster outlet 12 and is blown out onto the front window glass to prevent it from fogging. Note that the above-mentioned effect can be similarly achieved by using a completely cylindrical rotary damper having an air outlet or a hole in the middle as the mode switching damper 15. Also, heater core 1
4 is preferably provided at a position relatively close to the heat outlet 11, as shown in FIG. 2, so that the air flows out from the vent outlet 13 more than the air that flows out from the heat outlet 11 in the bilevel mode. The temperature of the air is lower, resulting in a temperature distribution with cold heads and warm feet, giving the occupants a comfortable air-conditioned feeling.

As is clear from the above, in the automotive air conditioner of the present invention, no matter how the mode switching damper 15 is rotated, the temperature of the blown air remains constant unless the air mix damper 17 is rotated. is maintained.

Therefore, according to the present invention, a rotary type air mix damper is provided along the inside of a semi-cylindrical heater core, and a rotary type air mix damper is provided along the cylindrical case equipped with heat, defroster, and vent outlets. By providing the mode switching damper, the conventional dampers installed at the heat, defroster, and vent outlets can be replaced with a single mode switching damper, and moreover, it can be installed in a single cylindrical case. Since the mode switching damper, heater core, and air mix damper are all housed, the automotive air conditioner according to the present invention has a simpler structure than conventional ones, and can significantly reduce the number of parts.
Therefore, it can be made compact, easy to assemble, and reduce costs.Furthermore, the temperature of the blown air can be set independently using only the air mix damper, and depending on the rotation of the mode switching damper, Since this temperature is not changed, this has the significant advantage that regulation can be better carried out.

[Brief explanation of the drawing]

FIG. 1 is a diagram schematically showing the entire automotive air conditioner according to an example of the present invention, FIG. 2 is a cross-sectional view taken along line A-A in FIG. 1, and FIG. Sectional views taken along line B-B of FIGS. 4 to 7
The figures are mode operation diagrams showing vent mode, bilevel mode, heater mode, and defroster mode, respectively. In the figure, 10... Cylindrical damper, 11... Heat outlet, 12... Defroster outlet, 13... Vent outlet, 14... Heater core, 15... Mode switching damper, 17... Air mix damper .

Claims (1)

[Claims] 1. A cylindrical case having a heat outlet, a defroster outlet, and a vent outlet on a circumferential surface, and a substantially semi-cylindrical heater core provided in the case, one end surface of the case being sealed. Air introduced from inside the heater core flows radially outward within the case,
Furthermore, a mode switching damper is provided so as to be adjustable and rotatable along the case, and selectively opens and closes each of the air outlets; 1. An air conditioning system for an automobile, comprising: an air mix damper that is adjustable and rotatable along the inside of the heater core so as to increase or decrease the passage area of the heater core for air flowing in the opposite direction.