JPS60215415A - Car air conditioner - Google Patents

Abstract

PURPOSE:To warm feet while cooling a head by providing an upper air outlet on the center of an air-mix passage and lower air outlets on the both sides and introducing a cold air into an air guide for the center of said air-mix passage and a hot air into an air guide for the both sides respectively. CONSTITUTION:Blast air 1 is turned to a cold air in an evaporator 2, and is portioned out to a heater core 3 and to a cold air bypass 5, in accordance with the opening of an air-mix damper 4. And the hot air passed through the heater core 3 flows into an air-mix passage 14. In a high-level mode, the damper 7 of an upper air outlet 6 and the damper 11 of a lower air outlet are both opened, and the cold air is directed to the center of the air-mix passage 14 by means of an air guide 12, while the hot air is directed to the both sides of the air-mix passage 14 by means of an air guide 12, while the hot air is directed to the both sides of the air-mix passage 14 by means of an air guide 15. Accordingly, cold air is chiefly gathered to the upper outlet 6, while the hot air is gathered to the lower outlet 10, to obtain a cooled-head and warmed-feet condition, improving comfortableness.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an air mix type automobile in which the temperature of the blown air is adjusted by adjusting the amount of cold air and warm air by rotating an air mix damper. Regarding air conditioners, especially in the temperature control range of pie level mode (simultaneous blowout mode of upper and lower air outlets), cold air is blown from the upper air outlet and warm air is blown from the lower air outlet, and the temperature of the air being blown out is low. This invention relates to an air conditioner that can obtain distribution.

[Conventional technology]

Conventionally, in an air mix type automobile air conditioner, in order to improve the mixing performance of cold and hot air, a near mixer provided with a fixed throttle guide is provided in the cold and hot air mixing section, and the air mixer (2 ) The upper air outlet and lower air outlet are connected to C.

The fixed throttle guide described above can mix the cold air and warm air flowing into the air mix damper to form conditioned air with a uniform temperature. In the case where air is blown only from the air outlet, conditioned air having a uniform temperature can be blown out from the upper air outlet or the lower air outlet, respectively, which is preferable.

[Problem that the invention seeks to solve]

However, with the above conventional device, even in the high-level mode where air is blown simultaneously from both the upper and lower outlets, the fixed throttle guide uniformly mixes cold air and warm air. There is a problem in that air having the same temperature as the air outlet is blown out, making it impossible to obtain a comfortable temperature distribution with cold heads and hot feet.

In view of the above-mentioned points, an object of the present invention is to provide an air conditioner for an automobile that has a simple structure and is capable of obtaining a comfortable temperature distribution with a cold head and warm feet during high-level mode (3).

[Means for solving problems]

In order to achieve the above object, the present invention provides a heater core that heats (b+86
a cold air bypass passage that bypasses the heater core; an air mix damper that adjusts the proportion of air flow to the heater core and the cold air bypass passage; an air mix passage that mixes the cold air that has passed through the cold air bypass passage; (el) an upper air outlet that is arranged so as to communicate with the central portion of the air mix passage; (fl) that communicates with both sides of the air mix passage; A technical means comprising: a lower air outlet arranged as shown in FIG. Adopt.

[For production]

According to the above technical means, in high level mode,
The warm air that has passed through the heater core is guided to both sides of the air mix passage by air guides provided in the passage downstream of the heater core, and the main stream of warm air can be blown out from the foot outlet that communicates with both sides of the air mix passage. . As a result,
The temperature of the air blown from the upper outlet can be made lower than the temperature of the air blown from the lower outlet, and a comfortable temperature distribution of the blown air with cold head and hot feet can be obtained.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. 1st
In the figures and Fig. 2, 1 is a motor-driven blower fan, and an inside/outside air switching box (not shown) is connected to its intake port to selectively introduce air outside the vehicle (outside air) and air inside the vehicle (inside air). has been done. (5) On the discharge side of the wind fan 1 is the evaporator 2 of the refrigeration cycle.
further downstream thereof, a heater core 3 that heats the blown air using engine cooling water as a heat source;
An air mix damper 4 is provided to adjust the ratio of the amount of cool air passing through the heater core 3 and the cold air bypass passage 5. heater core 3
An air mix passage 14 is provided downstream of the cold air bypass passage 5 to mix the warm air that has passed through the heater core 3 with the cold air that has passed through the cold air bypass passage 5. As shown, an upper outlet 6 for ventilation and cooling is connected to the center of the front, and a defroster outlet 8 and a lower outlet 10 for heating are connected to both left and right sides of the air mix passage 14. . Each of these air outlets 6.8.10 is provided with a damper 7.9.11, respectively, to open and close each air outlet.

An air guide 12 is attached to the air mix damper 4 on the side facing the cold air bypass passage 5. As shown in detail in FIG. 3 (6), the air guide 12 is constructed of a metal plate that is high at both ends and low at the center, and is shaped like a figure 7 when viewed from two sides.
The air guide 12 is fixed to the air mix damper 4 by a bracket 16 and a screw 17 integrally formed with the air guide 12.

Note that the air mix damper 4 and the air guide 12 may be integrally molded from resin. The air guide 12 directs the cold air passing through the cold air bypass passage 5 to the passage 5 and the air mix passage 14.
It plays the role of guiding towards the center. Furthermore, in this example,
Fixed throttle air guides 13 shown in FIG. 4 are provided on both sides of the cold air bypass passage 5 to guide the air flowing out of the cold air bypass passage 5 toward the center of the air mix passage 14. The air guide 13 is molded integrally with a resin case 20 of the air conditioner. Further, a fixed throttle air guide 15 is attached to the upper inner surface of the case 20 downstream of the heater core 3. As shown in FIG. 5, the air guide 15 is made of a metal plate that is high in the center and low at both ends and is V-shaped when viewed from the top. An air guide 15 is fixed to the inner surface of the portion with its 7-shaped tip facing toward the heater core 3 side. The air guide 15
The warm air that has passed through the heater core 3 is transferred to the air mix passage 14.
Its role is to guide both sides and slightly downward. Note that this air guide 15 may also be made of resin and may be integrally molded with the case 20. The case 20 integrally houses both the evaporator 2 and the heater core 3.

Next, the operation of this embodiment in the above configuration will be explained. Air inside the vehicle or outside the vehicle is sucked by the blower fan 1 through the inside/outside air switching box and sent to the evaporator 2, and the blown air is cooled by the evaporator 2 and becomes cold air.

A part of this cold air passes through the heater core 3 and becomes warm air depending on the opening position of the air damper 4, and the remaining part passes through the cold air bypass passage 5 as cold air. These warm and cold air enter the air mix passage 14 and are blown out to each outlet 6, 8, 10 depending on the operating mode.

It is now assumed that the air conditioner is operating at the pierehermote (simultaneous airflow from the one-way outlet (8) 6 and the lower outlet 10). In this case, the damper 7 of the upper outlet 6 and the damper 11 of the lower outlet 10 are both in an open state. Of the cold air that has passed through the evaporator 2, the main stream of the cold air that passes through the cold air bypass passage 5 is guided toward the center of the cold air bypass passage 5 by the air guide 12 on the air mix damper 4, and then guided toward the center of the air mix passage 14. be guided. Here, in this example, the cold air passes through the cold air bypass passage 5 by 3! 1, the air guide 13 of the passage 5 also guides the cold air toward the center of the air mix passage 14.

On the other hand, the main stream of warm air that has passed through the heater core 3 flows along the air guide 15 provided on the inner surface of the upper part of the case 20 downstream of the heater core, and is guided in both directions of the air mix passage 140 and slightly downward. In this way, both cold air and warm air are guided into the air mix passage 14, but since the main stream of cold air passes through the center of the air mix passage 14 and the main stream of warm air passes through both sides, the two only mix slightly. The cold air is mainly sent to the upper (9) blower outlet 6 located in the center, and the warm air is sent mainly to the lower blower outlet 10 located on both sides. Therefore, a moderate amount of cold air is blown into the vehicle interior from above, and a moderate amount of warm air is blown from below.
A comfortable temperature distribution with cold head and hot feet can be obtained, and the temperature control characteristics and temperature variation can also be improved. At this time, the temperature difference between the air from the upper air outlet 6 and the air from the lower air outlet 10 can be easily changed by changing the shape and height of each air guide 12, 13, 15, especially the heater core 3. This can be easily changed by changing the shape and height of the downstream air guide 15. Of course, if the height of the air guide 15 is increased, the temperature difference will increase.

Next, when operating in the heater mode or the hent mode, the damper 7 of the upper outlet 6 or the damper 11 of the lower outlet 10 are closed, so the air guide 12.13.1
Even if the main positions of the cold air and the warm air flowing into the air mix passage 14 are different due to the action of 5, they are ultimately guided only to the lower outlet 10 or only to the upper outlet 6. Cold air and warm air are mixed uniformly, and air of uniform temperature is blown out from each outlet (10) 6 or 10.

In addition, in the above-mentioned embodiment, the case where the present invention is applied to an automobile air conditioner having the evaporator 2 has been described, but the present invention is not limited to this, and can be similarly applied to an air conditioner not having the evaporator 2. Of course, it is applicable.

〔Effect of the invention〕

As described above, according to the present invention, with an extremely simple configuration in which an air guide is provided in the downstream passage of the heater core, the main stream of warm air can be guided to the lower outlet through both sides of the air mix passage. This makes it possible to obtain a comfortable blowout temperature distribution in the form of cold head and warm feet during high level mode.

[Brief explanation of the drawing]

FIG. 1 is a schematic side sectional view of an automotive air conditioner according to an embodiment of the present invention, and FIG. 2 is a schematic explanatory diagram showing the relationship between the air mix passage, each outlet, and each air guide of the device shown in FIG. 1. ,
3 is a perspective view of the air mix damper 4, FIG. 4 is a perspective view of the fixed throttle air kite 13, and FIG. 5 is a perspective view of the fixed throttle air guide 15. 1...Blower fan, 2...Evaporator, 3...
Heater core, 4... Air mix damper, 5... Cold air bypass passage, 6... Upper outlet, 10... Lower outlet, 12.13.15... Air guide, 14...
・Air mix passage, 20...case. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Scope of Claims] (A heater core that heats the al blast air; (b) a cold air bypass passage that bypasses the heater core; (C) an air mix damper that adjusts the proportion of air flow to the heater core and the cold air bypass passage; fd) an air mix passage that is provided downstream of the heater core and the cold air bypass passage and mixes the warm air that has passed through the heater core and the cold air that has passed through the cold air bypass passage; and (e) communicates with the central portion of the air mix passage. (gl) an upper air outlet arranged so as to communicate with both sides of the air mix passage; (l) a lower air outlet arranged in the downstream passage of the heater core, and
) An air conditioner for an automobile, comprising: an air guide that guides warm air that has passed through the tacoa to both sides of the air mix passage.