JP2567138B2 - Defroster outlet structure of automobile air conditioner - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a defroster outlet structure for an automobile air conditioner.

2. Description of the Related Art FIGS. 6 and 7 show a structure around a defroster outlet of a heater unit in a conventional air conditioner for an automobile, in which 1 is a heater unit having a built-in heater core 2 and a diff door 4, The defroster port 3 and the vent port 5, which are opened and closed by the vent door 6, are arranged adjacent to each other. 7 is attached to the defroster port 3 so that the air blown out from the defroster port 3 is fed to the front window panel 15
With a defroster nozzle that blows backward to the surface,
The defroster nozzle 7 is formed in a substantially V-shaped cross section in order to give directivity to the blown air flow as described above.
At the lower rear end of the defroster nozzle 7, a forwardly inclined accelerating portion 8 for increasing the pressure of the air blown from the defroster opening 3 to increase the flow velocity of the air is formed. Below the air mix chamber
A deflection guide 11 is extended toward the vent port 5 side in order to blow the conditioned air collected in 10 onto the acceleration unit 8. Reference numeral 12 is a defroster grill attached to an instrument panel 14, and a short and rearwardly inclined duct portion 13 arranged on an extension of the upper end portion of the defroster nozzle 7 is integrally formed on the lower surface thereof. This similar structure can be seen in, for example,
No. 15013 is disclosed.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention Since the defroster nozzle 7 and the defroster grill 12 have separate mounting bases for the heater unit 1 and the instrument panel 14, respectively, the upper end of the defroster nozzle 7 and the duct for the defroster grill 12 are provided. A gap G is inevitably formed in the portion connected to the portion 13. For this reason,
It cannot be denied that the air blown out from the gap G causes the defroster air volume to be insufficient, and the window transparency to be somewhat impaired. Therefore, it is conceivable to seal the connecting portion as a whole to prevent the leakage of blown air. In this case, however, the wind axis is increased by the air flow so that the wind shaft has the run-up portion 9 at the upper end portion of the defroster nozzle 7 and the defroster grill 12. Since the duct portion 13 is strongly bent in the direction of inclination, the blowing point on the surface of the front window panel 15 is shifted upward, and eventually the window transparency is not improved. This change in the wind axis can be eliminated by increasing the length of the run-up portion 9 of the defroster nozzle 7 to enhance the rectification effect, but the height position of the instrument panel 14 is set to be higher from the viewpoint of securing the front view. Under a low constraint, it is not practical to prevent the wind axis from changing due to the lengthening of the approach portion 9.

Therefore, the present invention can solve the shortage of the defroster air volume, prevent the change of the wind axis without enlarging the run-up portion of the defroster nozzle, and improve the window transparency of the front window panel. A defroster outlet structure of an air conditioner for a vehicle is provided.

Means for Solving the Problem A defroster nozzle having a forward-inclined accelerating portion formed on a rear side wall is attached to a defroster port of a heater unit, while a backward-inclined duct portion is formed on a lower surface of a defroster grill attached to an instrument panel. However, in the structure in which this duct portion is arranged continuously to the defroster nozzle, the air blown out from the defroster nozzle is blown out in the backward oblique direction toward the front window panel surface, and the upper end of the defroster nozzle, The connecting portion with the lower end of the duct portion of the defroster grill is sealed with a sealing material, and the inside air intake portion is formed at the rear side portion of the connecting portion.

Further, a guide protrusion for directing the blown air flow to the front window panel surface is provided on the rear edge of the upper edge portion of the above-mentioned defroster grill.

When conditioned air is blown from the defroster nozzle to the defroster nozzle, the sealing material prevents air from leaking from the joint between the upper end of the defroster nozzle and the lower end of the duct of the defroster grill, and the passing airflow prevents these air leakage. Due to the negative pressure generated in the vicinity of the inner surfaces of the defroster nozzle and the duct portion, the air inside the vehicle compartment is sucked from the inside air intake portion formed at the rear side portion of the connecting portion. Due to this inflow of the inside air, the wind axis, which tends to be bent backward in the duct portion, is corrected to the front, and the deviation of the air blowing contact point on the front window panel surface is avoided. Further, in the case where a guide protrusion is attached to the rear edge of the upper edge portion of the defroster grill, the air flow blown out along the rear side surface of the duct portion is further deflected forward by the rectifying action of the guide protrusion. The above-mentioned deviation of the air hit point is avoided.

Embodiment Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings by attaching the same reference numerals to the same portions as those of the conventional configuration.

In FIGS. 1 and 2, reference numeral 20 denotes a defroster nozzle attached to the defroster port 3 of the heater unit 1, which is different from the conventional defroster nozzle 7 having a run-up portion 9 at the upper end portion thereof, and accelerates the rear wall as a whole by inclining forward. The structure is formed as the part 21 and the conventional run-up part 9 is omitted. Further, a sealing material receiver 22 is formed on the upper edge of the defroster nozzle 20,
A sealing material 23 is adhered and fixed on the sealing material receiver 22, and a continuous portion of the defroster grill 12 mounted on the instrument panel 14 with the lower end of the duct portion 13 is sealed by the sealing material 23. As well as
An inside air intake portion 24 is formed at the rear side portion of the continuous portion. In the present embodiment, the sealing material 23 is disposed on the front side and the left and right sides of the connecting portion, and the gap between the rear side portion of the sealing material receiver 22 and the lower end of the rear side wall of the duct portion 13 is set to the inside air intake portion. It is as 24.

Therefore, according to the structure of the above-described embodiment, the air blown from the defroster port 3 of the heater unit 1 hits the accelerating portion 21 of the defroster nozzle 20 to increase its pressure, and the flow velocity in the duct portion 13 of the defroster grill 12 is increased. Is expelled and blown out toward the front window panel 15. Here, when air is blown into the defroster nozzle 20 from the defroster nozzle 3 as described above, the upper end of the defroster nozzle 20 and
Since the front side and the left and right sides of the connecting portion with the lower end of the duct portion 13 of the defroster grill 12 are sealed with the sealing material 23,
Air is prevented from leaking from the connecting portion, and shortage of air volume is avoided. In this way, the air volume is increased and the flow velocity is accelerated, and the air flows from the upper end portion of the defroster nozzle 20 into the duct portion 13, so that a negative pressure is generated near the inner surface thereof. On the other hand, the inside air intake part is provided at the rear part of the connecting part.
Since the inside air intake portion 24 is formed, the inside air intake portion 24 draws in the vehicle interior air. Due to the inflow of the inside air, the wind axis, which tends to be bent backward as shown by the chain line arrow in FIG. 1 in the duct portion 13 which is tilted backward, is corrected forward as shown by the coaxial solid line arrow, and the air on the surface of the front window panel 15 is corrected. The deviation of the hit point can be avoided, and therefore the window fineness can be further improved.

Further, particularly in this embodiment, since the conventional run-up portion 9 is omitted in the defroster nozzle 20, the height of the instrument panel 14 can be reduced by that much, and the degree of freedom in instrument design is expanded. At the same time, it is possible to improve habitability and front visibility.

The embodiment shown in FIG. 3 is an acceleration unit of the defroster nozzle 20.
21A is formed into a curved surface having a substantially S-shaped cross section. According to this embodiment, since the acceleration portion distance can be sufficiently secured by forming the S-shaped curved surface of the acceleration portion 21A, the height of the defroster nozzle 20 can be further lowered without impairing the lateral air flow distribution performance. At the same time, since there is no acute angle portion in the corners connected to the rear lower end of the acceleration portion 21A and the duct portion 13, there is no possibility of causing a separation phenomenon of the air flow in the corners connected, and Disturbance can be surely eliminated.

In the embodiment shown in FIG. 4, a rearwardly inclined run-up portion 25 is formed on the upper end portion of the defroster nozzle 20, and the acceleration portion 21A is formed in a curved surface having a substantially S-shaped cross section. In the case of this embodiment, Instrument panel 14 due to the presence of approach section 25
Although the height position of the windshield does not change from the conventional one, by increasing the air volume and preventing the change of the wind axis, it is possible to improve the window transparency of the front windshield panel 15 surface without increasing the length of the approach portion 25. it can.

The embodiment shown in FIG. 5 is a conventional prototype type in which the defroster nozzle 20 is formed in a generally V-shaped cross section as a whole, and has a forwardly accelerating portion 21 and a rearwardly inclined run-up portion 25. The invention is applied. Further, in this embodiment, the guide protrusion 26 is provided on the rear edge of the upper edge of the defroster grill 12.
Is provided. Therefore, according to this embodiment, since the air is blown out along the rear wall surface of the duct portion 13 because the guide projection 26 has a rectifying action, it is possible to prevent the air blown out toward the rear of the passenger compartment so that all of the blown air is fronted. It can be directed to the 15th window panel. If the guide protrusion 26 is attached to the embodiment shown in FIGS. 1, 3, and 4 as shown by the chain line, the window transparency can be further improved.

EFFECTS OF THE INVENTION As described above, according to the present invention, it is possible to prevent the air from leaking from the connecting portion of the defroster nozzle and the duct portion of the defroster grill, and to ensure a sufficient amount of blown air, as well as the rear side of the connecting portion. It is possible to prevent the blow-out air axis from being deflected to the rear of the vehicle compartment due to the air intake action in the vehicle interior from the inside air intake portion provided in the portion, so that there is no deviation of the air blow contact point on the front window panel surface, and In addition, it has a practically great effect that the window transparency can be further improved.

[Brief description of drawings]

FIG. 1 is a schematic sectional view showing an embodiment of the present invention, FIG. 2 is a rear side view of the defroster grill of the same embodiment, and FIGS. 3, 4, and 5 are different views of the present invention. FIG. 6 is a schematic sectional view showing an example, FIG. 6 is a schematic sectional view showing a conventional structure, and FIG. 7 is an enlarged view of the main part. 1 ... Heater unit, 3 ... Defroster port, 12 ... Defroster grille, 13 ... Duct part, 14 ... Instrument panel, 15 ... Front window panel, 20 ...
Defroster nozzle, 21, 21A ... Accelerator, 23 ... Sealing material, 24 ... Internal air intake, 26 ... Guide protrusion.

Claims (2)

(57) [Claims] 1. A defroster nozzle having a forward accelerating portion formed on a rear side wall is attached to a defroster port of a heater unit, and a rearwardly inclined duct portion is formed on a lower surface of a defroster grill attached to an instrument panel. In the structure in which the duct portion is connected to the defroster nozzle and the air blown out from the defroster mouth is blown backward toward the front window panel surface, the upper end of the defroster nozzle and the defroster grille. A defroster outlet structure for an air conditioner for an automobile, characterized in that a continuous portion of the duct portion with a lower end is sealed with a sealing material, and an inside air intake portion is formed at a rear side portion of the continuous portion. 2. The defroster outlet structure for an automobile air conditioner according to claim 1, wherein a guide protrusion for directing the blown air flow to the front window panel surface is provided at the rear edge of the upper edge portion of the defroster grill.