JPS59128007A - Airconditioner for automobile - Google Patents

Abstract

PURPOSE:To enable increase in the air volume at the maximum cooling while improving the temperature controlling property by providing an auxiliary damper on the downstream of an air-mix damper to guide a cool air from a cool air path for mixing with a hot air of a hot air path. CONSTITUTION:An airconditioning body unit 8 is so arranged in a room to have an air blow from a blower unit 6 provided at a cawl section 5 below a bonnet 2. This unit 8 is equipped with a case 9 comprising a plurality o slip bodies and a cooler core 10 on the uppermost stream of an air path therein 9. A heater core 12 is provided roughly at the center of case 9 and temperature controlling air mix damper 14 provided rotatably about a shaft 13 at the side 12a of an air inlet of the heater core 12. In addition, an auxiliary damper 17 is provided rotatably around a shaft 18 at the part from a cool air path 15 between said inlet side 12a and the surface 9a of the case to a hot air path 16 between the surface 12b of a heater core air outlet and the surface 9b of the case.

Description

[Detailed description of the invention] The present invention relates to an automatic Ichikawa air conditioner.

1 Conventionally, automatic Ichikawa air conditioners have mainly adopted a method in which the temperature of the blown air is controlled by adjusting the air volume ratio between warm air heated by the heater core and cold air that does not pass through the heater core, depending on the opening degree of the air mix damper. has been done. In this system, if the cold air and hot air are not mixed well and uniformly, the temperature of the air blown out from each outlet will vary, and temperature controllability will deteriorate. Therefore, it has been proposed to provide a mixing chamber with a constriction section so that cold and hot air can be mixed well, but in this configuration, the presence of the constriction section increases ventilation resistance, so it is difficult to This will hinder the request to increase air volume.

In view of the above points, the present invention aims to achieve both the function of improving the mixing properties of cold and hot air, and the function of reducing ventilation resistance and increasing air volume during maximum cooling or ventilation. do.

The present invention will be described below with reference to the illustrated embodiments.

Fig. 1 shows the state in which the device of the present invention is mounted on an automobile, where ■ is the windshield of the automobile, 2 is the bonnet, 3 is the engine room, 4 is the passenger compartment, and 5 is the passenger compartment 4 and the engine compartment 3.
The cowl portion is formed by a space surrounded by the bonnet 2 and the bonnet 2.

In this embodiment, a blower unit 6 portion of the air conditioner is installed within the cowl portion 5. The blower unit 6 has a blower fan 7 driven by a motor (not shown), and an internal air switching box is provided on the suction side of the blower fan 7 to selectively introduce air inside the vehicle and air outside the vehicle. It is being

An air conditioning main unit 8 into which air is blown and introduced from the blower unit 6 is installed inside the vehicle compartment 4, and this unit 8
has a case 9 made up of a plurality of divided bodies joined together due to assembly requirements. A cooler core 1O is installed at the most upstream side of the air passage formed in this case 9. The cooler core 10 is composed of a refrigerant evaporator of a refrigeration cycle operated using an automobile engine as a driving source. At the lowest part of the case 9, there is a drain port 11 for drain water generated in the cooler core 10.
is formed. In addition, a heater core 1 whose heat source is the cooling water (warm water) of an automobile engine is installed approximately inside the case 9.
2 is installed, and this heater core L Q air inlet 1
An air mix damper 14 for temperature control, which is rotatable around the shaft 13, is provided on the side 12a.

Further, a cold air passage 15 is formed between the air inlet side 12a of the heater core 12 and a case surface 9a facing the air inlet side 12a at a predetermined interval. The ratio of the amount of air (warm air) that flows in and is heated is adjusted by the opening degree of the air mix damper 14.

Further, a hot air passage 16 is formed between the air outlet surface 12b of the heater core 12 and the case surface 9b facing the air outlet surface 12b at a predetermined distance. It also serves as a mixing chamber for mixing the cool air that has passed through the heater core 12 with the warm air that has passed through the heater core 12. Further, a guide plate 17 formed on the case 9 and the body protrudes from the air outlet side 12b of the heater door 12. Mix well.

On the other hand, at a position above the heater core 12, the cold air passage 1
An auxiliary damper 17 is disposed at a portion extending from the hot air passage 16 to the hot air passage 16, and the auxiliary damper 17 is rotatable around a shaft 18. The auxiliary damper 17 is formed in a U-shape so as to guide the cold air and improve the mixing properties of the cold and hot air.

A defroster outlet 19 for blowing hot air onto the front glass 1 is provided at the top of the case 9, and the defroster outlet 19 is opened and closed by a damper 20 that is rotatable around a shaft 26. . A central upper air outlet 17 is provided on the front side of the case 9 so as to be located below the defroster air outlet 19 and above the auxiliary damper 17. This upper air outlet 17 blows air toward the upper body of the occupant, and is opened and closed by a damper 22. The damper 22 is configured to be rotatable around a shaft 27. In addition, the defroster outlet 19
Upper air outlets L123 on both sides are provided on both left and right sides of the case 9 so as to be located below the auxiliary damper 17 and above the auxiliary damper 17. The upper air outlets 23 on both sides communicate with air outlet grilles provided on both left and right sides of an automobile illumination panel (not shown) via ducts (not shown), and dampers ( By manually opening and closing the openings (not shown), ventilation to the upper air outlets 23 on both sides is interrupted.

Further, a lower air outlet 24 is provided at a portion of both left and right side surfaces of the case 9 that communicates with the hot air passage 16 above the heater core 12, and this lower air outlet 24 has a downward air outlet duct (not shown). This downward blowing duct is formed so as to blow air toward the passenger's feet. Further, the lower air outlet 24 is opened and closed by a damper 25.

FIG. 2 shows the main parts of the air conditioning control panel 30 installed near the driver's seat in the vehicle interior. Reference numeral 14a is an operating lever for the air mix damper 14, and the shaft of this damper 14 is connected via a controller cable, link, etc. One rod is connected to three. 17a is an operating lever for the auxiliary damper 17, which is similarly connected to the shaft 18 of the auxiliary dampers 1 and 7.

20a is a control lever for the damper 20, which also controls the damper 20.
is connected to the shaft 26 of. 25a is the damper 25
This control lever is also connected to the shaft (not shown) of the damper 25.Although not shown in FIG. Lever etc. are arranged. Also, the damper 2
2 can be directly operated manually using an operating lever (not shown) provided near the upper air outlet 21.

Next, the operation of this embodiment in the above configuration will be explained. The air selected by the occupant and sucked in from the inside air suction port and outside air suction port provided in the blower unit 6 is sent to the cooler collector 10, where it is dehumidified and cooled. Next, the dehumidified and cooled air that has exited the cooler core 10 is distributed to the heater core 12 and the cold air passage 15 according to the operating position of the air mix damper 14. For example, air mix damper 14
is at the 14'' position, all of the cold air is guided to the cold air passage 15, and cold air is blown out from each outlet (19', 21, 23, 24).
', all the cold air enters the heat core 12, where it is heated and becomes warm air, and each outlet (19, 21
, 23, 24) blows out warm air. Furthermore, the above 14'
When the air damper 14 is located at an arbitrary intermediate position between 14" and 14", the hot air and cold air are adjusted to predetermined distribution amounts, respectively, according to the damper opening degree. Therefore, °ζ, When the air-nox damper 14 is at any position between 14' and 14'' and the auxiliary damper 17 is at the 1-7' position, the cold air that has entered the heater core 12 is recirculated once by the heater core 12. It becomes warm air and enters the hot air passage 16 which also serves as a mixing chamber. Further, the remaining cold air distributed by the air filter 14 passes through the cold air passage 15, is guided by the auxiliary damper 17, and is directed to the heater core 12 in the direction of the arrow.
The air bypasses the side of the air passage, enters the hot air passage (6), mixes with the warm air that has passed through the heater unit 12, is adjusted to a predetermined temperature, and is guided to each outlet (19, 21, 23, 24). It will be destroyed.

Here, the temperature a of the blown air can be adjusted from a low temperature to a high temperature by operating the air mix damper 14 by operating t<-14a, changing the damp/zH opening degree, and changing the mixing ratio of cold air and hot air. Any desired blowing air temperature can be obtained continuously. Next, to describe the function of the auxiliary damper 17, when the occupant requests only cold air, such as during maximum cooling, the air mix damper 14 is moved to the 14'' position, and the auxiliary damper 17 is moved to the 17'' position. Depending on the situation, the cold air will flow through the upper air outlet 21°23 as shown by arrows B and C.
can be reached in the shortest distance. Therefore, compared to the case where the cold air flows by bypassing the auxiliary damper 17 as shown by the arrow E, the ventilation resistance is much smaller when the cold air flows as shown by the arrows B and C, and the air volume can be increased accordingly. It also makes it possible to increase the blowing air speed, improving the cooling effect. Here, even in the ventilation mode in which the cooler core 10 is not operated, it is preferable to operate the auxiliary damper 17 to the 17'' position to increase the air volume. Also, when in pie level mode <! iJl'X When the passenger requests temperature distribution of foot heat, cool air,
The ratio of hot air is adjusted, and by operating the auxiliary damper 17 to the intermediate position or the 17'' position, part or all of the cold air that has passed through the cold air passage 15 is transferred to the hot air passage 16 which also serves as a mixing chamber. In other words, it is possible to flow completely cold air into the upper outlet 21, 23 as shown by arrows B and C without mixing it with hot air. The cold air A entering the hot air passage 16 mixes with the warm air that has passed through the heater core 12 and is blown out from the lower air outlet 24. However, the auxiliary damper 17 is 17"
At the position, only the warm air that has passed through the heater core 12 can be blown out from the lower blade outlet 24 along the inner wall of the case 9b.

From the above, the cold air mainly flows to the upper air outlet 21°23.
In addition, the warm air can be mainly blown out from the lower outlet 24,
By arbitrarily selecting the opening degree II of the air mix damper 14 and the relationship @ adjustment of the auxiliary damper i7, it is possible to continuously air-condition the vehicle interior with an arbitrary temperature distribution of cold head and warm feet. . Even when air is simultaneously blown out from the defrost outlet 19 and the lower outlet 24, the temperature distribution of cold head and warm feet can be obtained in the same way.

In this embodiment, as can be understood from the above explanation, by operating each damper 20, 22, 25 independently, the occupant can freely select the air outlet that suits his or her preference. In addition, by combining the air mix damper 14 and the auxiliary damper 17, it is possible to mix the cold and hot air well and adjust the temperature of the blown air over a wide range. Increase and temperature distribution of head cold and foot heat during pie level mode can be easily achieved.

FIG. 3 shows another embodiment of the present invention, in which the auxiliary damper 17 is formed into a normal flat plate shape, and the auxiliary damper 1
7 from the shaft 18 to the air guide wall 3 toward the air downstream side.
1 is provided, and the flow of cold air is guided along this wall 31 to improve mixing with warm air. Preferably, the wall 31 is integrally molded with the case 9.

FIG.
4a for interlocking operation. In other words, the operating mechanisms of both dampers 14 and 17 are interlocked by an appropriate mechanism, and within the operating range of the operating lever 14a, 1 in FIG.
4' to 17', the auxiliary damper 17 is maintained at the position 17' shown in FIGS. 1 and 3, and the operating lever 17 is
When the damper 17 is operated from 7' to 17''(14''), the auxiliary damper 17 is operated from the 17' position to the 17'' position as shown in Fig. ff11 and Fig. 3. According to this example, the operation lever 17a shown in FIG. 2 is not required, and a temperature distribution of cold head and foot heat can be obtained based on a preset temperature difference.Furthermore, during maximum cooling, the auxiliary damper 17 is activated. By operating it to the 17'' position, the air volume can be increased.

In addition, as a modification of the embodiment shown in FIG. 4, when the air mix damper 14 and the auxiliary damper 17 are linked, the auxiliary damper 17 is moved to the 17'' position only when the air mix damper 14 is at the maximum cooling position 14''. When activated, the auxiliary damper 17 may be always placed at the position 17' in other conditions.

If such a configuration is adopted, the direct flow of cold air from the cold air passage 15 to the upper outlet 2.1°23 in the direction of the arrows B and C is eliminated, but the EIIQ cold air still flows toward the arrows. The temperature distribution of head cold and foot heat can be obtained by the flow.

Note that the dampers 20, 22, 25, etc. for opening and closing the air outlet may be interlocked with each other by an appropriate mechanism, and may be operated by one common operating lever.

Further, the manually operated member of the air conditioning control panel 30 is not limited to the reciprocating L-bar, but may of course be a dial-shaped member that is rotatably operated.

In addition, the interlocking mechanism of each damper is the link and control 1-1-
The present invention is not limited to a purely mechanical mechanism such as a cable, and other mechanisms such as controlling the operation of a damper drive diaphragm actuator using a solenoid valve in a negative pressure circuit or electrically controlling a damper drive motor may also be used.

Furthermore, the present invention can be implemented in exactly the same way in an air conditioner that does not have a cooler.

As described above, according to the present invention, the cold air from the cold air passage 15 can be guided by the auxiliary damper 17 and mixed well with the warm air in the hot air passage 16, and the temperature controllability is good. Auxiliary damper 17 at maximum cooling or ventilation
By operating the cold air passage 15, the cold air can flow directly to the upper air outlets 21 and 23, which has the excellent effect of reducing ventilation resistance and increasing the air volume.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the device of the present invention, FIG. 2 is a front view of the main part of the air conditioning control panel without showing the operating mechanism of each damper shown in FIG. Figure f64 is a partial front view of an air conditioning control panel showing still another embodiment of the present invention. 12... Heater core, 14... Air mix damper, 15... Cold air passage, 16... Hot air passage, 17...
・Auxiliary damper, 21.23...Upper air outlet. Attorney Patent Attorney Okabe No. 1C No. 2 Figure 41.1 Procedural amendment (1 example) Indication of the case 11m 1 J58 special MMS No. 2508 2 Name of the invention Automotive air conditioner 3 Person making the amendment Relationship to the case Patent Applicant Aichi Prefecture Kariya 4yama'JT=111IT 1-1 (4
26) Representative of Nippondenso Co., Ltd. Toda Madodai 4th Representative Mr. R1-1-5, Kariya City, Aichi Prefecture 448, Column for detailed explanation of the invention of the document subject to amendment and drawings. King's contents (11 Specification, page 4, line 15 and page 16, board 17J has been corrected to ``board 9cJ.'' (2) Page 5, line 11 and line 12 of the same document. "Upper air outlet 17" is corrected to "upper air outlet 21" respectively. (3) 1 Coolakou IOJ on page 7, line 11 of the same book is 1-
Corrected to "Cooler Core 10". (4) "Figure 1", "Figure 2" and "Figure 3" of the drawings
We will correct (correct the signs) each as shown in the attached sheet. Figure 1 Figure 2

Claims (1)

[Claims] A heater core that heats the blown air, an air mix damper that adjusts the air volume ratio of warm air that flows into the heater core to be heated and cold air that does not pass through the heater core, and a hot air passage through which the warm air heated by the heater core flows. , a cold air passage through which cold air that does not pass through the heater core flows, and the cold air in the cold air passage, the cold air flowing toward the hot air passage, and the cold air flowing directly toward the upper air outlet without passing through the hot air passage. Automatic Ichikawa air conditioner equipped with an auxiliary damper to control the flow.