JPH05619A - Ventilating device for vehicle air conditioning device - Google Patents

Abstract

PURPOSE:To improve comfortableness of air conditioning of a car room. CONSTITUTION:An air guide 9 is connected to the outlet side of a heater core 3 at its one end, and connected to a mixing chamber S at the other end. At an intersection of the air guide with a hot air passage 4 extending from the bottom of the heater core 3, the tip of the air guide is inclined to the middle position of the opening and closing angle of an upper-lower blowoff changeover damper 6. Besides, the air guide 9 is designed to be curved so as to have a recessed face on the lower blowoff side. Thus, the difference between the air temperature in the upper part of a car room and the air temperature in the lower part of the room becomes larger, and a comfortable air conditioning of 'head-cold and foot-hot' type can be obtained. Further, hot air can be smoothly blasted downward. Furthermore, since the air blown up from just below the tip part of the air guide 9 is deflected at the lower end part, the middle part, etc., along the recessed face, and subjected to a large force horizontally from the air advancing nearly in the horizontal direction, little or no air strikes the tip of the air guide 9, and thereby the generation of noise (whiz) can be restricted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blower for an air conditioner for a vehicle, in which the temperature of blown air is adjusted according to the mixing ratio of cold air and hot air, and air with a temperature difference is blown out to the upper and lower outlets. It is about.

[0002]

2. Description of the Related Art Conventionally, in a vehicle air conditioner of this type, as shown in FIG. 1, cold air that has entered a heater inlet 101 is branched by an air mix damper 102, and a part of the cold air is made to flow to a heater core 103 to generate warm air. Then, the cold air and the hot air were mixed together by flowing into the mixing chamber 105 through the hot air passage 104.
Then, other cold air flows from the heater inlet 101 to the mixing chamber 105.
And was mixed with the warm air.

Further, the mixed air is branched into an upper air outlet 107 and a lower air outlet 108 by a vertical air outlet switching damper 106.

[0004]

However, when the upper and lower outlet switching damper 106 is in the position 109 where the mixed air is branched to both the upper outlet 107 and the lower outlet 108 at the same time, the cool air arrow 111 is caused by the air flow attracting action. There is a drawback that the airflow arrow 111 flows into the lower air outlet 108, and conversely, the warm air arrow 111 flows toward the upper air outlet 107 to reduce the temperature difference between the upper air outlet and the lower air outlet, resulting in poor air mix performance. ..

This will be described with reference to FIG. FIG. 2 is a temperature control characteristic diagram of blown air. The vertical axis shows the blown air temperature T, and the horizontal axis shows the opening degree θ of the air mix damper 102. C indicates the maximum cooling time, H indicates the maximum heating time, T _C indicates the temperature of the air blown from the upper outlet 107,
T _H represents the blowing temperature of the lower outlet 108.

As described above, in the conventional configuration, as shown in FIG. 2, the outlet air temperature T _C of the upper outlet 107 and the lower outlet 1
As the air distribution in the passenger compartment for the temperature difference is small outlet temperature T _H of 08, that it is difficult to difference in air temperature and vehicle compartment lower air temperature in the passenger compartment upper obtain comfortable air conditioning of small Zukansokunetsu type It had drawbacks.

The present invention has been made to solve the above problems, and an object thereof is to improve comfort of air conditioning in a vehicle compartment.

[0008]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention has one end communicating with the outlet side of a heater core and the other end communicating with a mixing chamber, and a hot air passage extending from the bottom to the side of the heater core. An air guider is provided at the confluence portion with the air guider, the tip of which is inclined toward the intermediate position of the opening / closing angle of the upper / lower blowout switching damper and which has a concave surface on the lower blowout side.

[0009]

According to the above structure, the warm air flows under the cold air along the flow of the cool air regulated by the air guider and the vertical switching damper.

That is, since the warm air flows so as to be wrapped in the lower side of the cold air, it is not blown out from the upper air outlet, and therefore comfortable air conditioning of head cold foot heat can be performed. Moreover, since the lower surface side of the air guider is concave, the wind blown up from just below the tip of the air guider is
There is almost no wind that hits the tip of the air guider because there is almost no wind hitting the tip of the air guider due to the large force in the horizontal direction from the wind that is deflected along the concave surface at the lower end part and the center part of the air guider and progresses in a direction that is almost horizontal. ) Can be suppressed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. First, the configuration of the air conditioner will be described with reference to FIG.

In the figure, A is an air conditioner body, 1 is a heater inlet chamber, 2 is an air mix damper for adjusting the mixing ratio of cold and warm air, 3 is a heater core, 4 is a hot air passage, 5 is cold air and hot air. A mixing chamber for mixing and, 6 is an upper / lower blowout switching damper for performing upper and lower blowouts, 7 is an upper blowout port, 8 is a lower blowout port, 9 is an air guider provided at the confluence of the mixing chamber and the warm air passage, The blowout switching damper is formed in an arc shape so that its tip is inclined toward the intermediate position of the opening / closing angle.

The operation of the above configuration will be described. The cold air that has entered the heater inlet chamber 1 is branched by the air mix damper 2, a part of which becomes hot air through the heater core 3 and enters the mixing chamber 5 that mixes cold air and hot air via the hot air passage 4. Other cold air flows into the mixing chamber 5 from the heater inlet chamber 1 and the cold air and the warm air are mixed. The mixed air is branched into an upper air outlet 7 and a lower air outlet 8 by an up / down air outlet switching damper 6. Position 1 at which the upper and lower outlet switching damper 6 branches the mixed air into both the upper outlet 7 and the lower outlet 8 at the same time.
When it is at 0, the warm air arrow 11 flows along the air guider 9 because the tip of the air guider 9 is inclined toward the upper and lower blowout switching damper 6, hits the upper and lower blowout switching damper 6, and flows toward the lower outlet 8. The cold air arrow 12 flows upward along the air guider 9 and easily flows toward the upper outlet 7.

Therefore, the temperature difference between the upper air outlet 7 and the lower air outlet 8 becomes large, and a comfortable cold air temperature distribution of blown air can be obtained.

Next, the temperature control characteristic of the blown air according to this embodiment will be described with reference to FIG. Here, the vertical axis represents the blown air temperature T, and the horizontal axis represents the opening degree θ of the air mix damper 2. Further, C represents the maximum cooling time, H represents the maximum heating time, T _C represents the temperature of the air blown from the upper outlet 7, and T _H represents the temperature of the lower outlet 1.

In the figure, the difference between T _C and T _H is larger than that of the conventional example shown in FIG. 2, and the difference between the air temperature in the upper part of the passenger compartment and the air temperature in the lower part of the passenger compartment is large. It is possible to obtain comfortable air conditioning of the head cold foot type.

Further, since the air guider 9 is curved so as to have a concave surface on the lower outlet side, the warm air blown up toward the mixing chamber through the warm air passage is deflected downward along the concave surface of the air guider 9. Therefore, the warm air can be smoothly blown downward.

Further, since the air guider 9 is curved, the wind blown up from just below the tip of the air guider is deflected along the concave surface at the lower end portion, the central portion, etc. of the air guider and proceeds from a wind that is nearly horizontal to the horizontal direction. Since it receives a large force in the direction and is deflected, there is almost no wind that hits the tip of the air guider, and thus noise (wind noise) can be suppressed.

[0019]

As described above, according to the present invention, the difference between the air temperature in the upper part of the passenger compartment and the air temperature in the lower part of the passenger compartment becomes large, and it is possible to obtain comfortable air conditioning of the head cold foot type.

Further, the warm air can be smoothly blown downward. Furthermore, the wind blown up from just below the tip of the air guider is deflected along the concave surface at the lower end and the center of the air guider, and receives a large horizontal force from the wind that progresses in a nearly horizontal manner. Since there is almost no wind that hits the tip of the, it is possible to suppress the generation of noise (wind noise).

[Brief description of drawings]

FIG. 1 is a side sectional view of a conventional heater unit of an air conditioner.

FIG. 2 is a temperature control characteristic diagram of the air blown out of the device.

FIG. 3 is a side sectional view of an air conditioner showing an embodiment of the present invention.

FIG. 4 is a temperature control characteristic diagram of blown air by the same device.

[Explanation of symbols]

 2 Air mix damper 4 Warm air passage 5 Mixing chamber 6 Vertical blowout switching damper 9 Air guider

Claims (1)

Claims: 1. A temperature adjusting damper for adjusting a mixing ratio of hot air passing through a hot water type heater core and cold air passing through a bypass passage above the heater core in an air conditioner body. A mixing chamber located downstream of the adjustment damper and above the heater core for mixing cold air and warm air; and a mixed air located downstream of the mixing chamber and communicating with the upper outlet. An air mix type vehicle air conditioner is configured by providing upper and lower blowout switching dampers that distribute air to the ventilation port and the ventilation port communicating with the lower air outlet, respectively, and further connect one end to the mixing chamber and the outlet side of the heater core. The other end is communicated with the mixing chamber, and the leading end is inclined toward the middle position of the opening / closing angle of the upper / lower blowout switching damper at the confluence with the warm air passage extending from the bottom to the side of the heater core and the lower blowout side. Blower vehicle air conditioning apparatus provided with a curved Eagaida to have a concave surface.