JP2001088545A - Air register - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide ventilating structure of an air register moderating a lowering of ventilating performance caused by bending a draft air duct. SOLUTION: A plurality of deflecting blade bodies 7 are disposed at specified spaces in a retainer 3 of an air register body 2 so as to cross a bent part 3c of the retainer 3. The deflecting blade body 7 is formed in the connected shape of an inflow side blade part 7a extending toward the inflow side opening of the retainer 3 and a blowoff side blade part 7b extending toward a blowoff side opening. The cross-sectional shape of a corner part of the deflecting blade body 7 formed of the inflow side blade part 7a and blowoff side blade part 7b is so formed as to be easy on an inside part 7c of the corner and to be angular on an outside part 7d. The deflecting blade bodies 7 and the retainer 3 can thereby be formed easily and integrally by injection molding.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a register and, more particularly, to a technique for mitigating a decrease in ventilation performance caused by a bent air passage when an air passage of an air conditioner is bent near an air outlet. About.

[0002]

2. Description of the Related Art In a vehicle ventilation system, a register 11 as shown in FIG. 6, for example, is provided on an instrument panel, and a plurality of knobs 13 provided on an outlet side of a retainer 12 are operated. Wind direction adjusting fins 14
Is tilted to obtain a desired wind direction. The rear end side of the retainer 12 is fitted into a fitting portion 16 of a duct 15 which constitutes a terminal end of an air passage of the air conditioner. The inflow opening 17 of the duct 15
Is further connected to a duct or the like (not shown). And the duct 1 extending to the vicinity of the instrument panel
5 at a predetermined angle (for example, about 90
°) to guide the airflow to the outlet on the front side of the instrument panel.

In such a configuration of the air passage, the air flow sent into the register 11 via the bent portion of the duct 15 has a flow state schematically shown in FIG. 7, and a part of the stream line is separated. This impedes the flow and causes a problem that the air volume distribution at the outlet is not uniform.
A technique for solving this problem is disclosed in Japanese Utility Model Laid-Open Publication No. Sho 56-78941 or Japanese Patent Laid-Open Publication No. Sho 61-143648. The duct of the air conditioner disclosed in the former publication is provided on the instrument panel 25 by arranging a plurality of concentric straightening plates 24 in the bent portion 23 of the duct 22 as shown in FIG. This is to make the air volume distribution in the blower outlet 26 uniform. Further, in the ventilator structure disclosed in the latter publication, as shown in FIG. 9, rectifying vanes 36, 37 having a predetermined radius of curvature are provided on a guide 35 of a ventilator casing 34 inserted into a bent portion 33 of a duct 32. This is to reduce the energy loss in the curved flow path. Reference numeral 38 in the figure denotes a louver.

[0004]

However, from the viewpoint of easiness of manufacturing the former duct structure of the two publications disclosed above, a plurality of straightening plates 24 provided in the bent portion 23 have a concentric arc shape. Therefore, it can be understood that a mold such as injection molding is complicated, and it is difficult to integrally manufacture the duct 22 with the current plate at relatively low cost. If a two-part structure is used, which is easy to manufacture, the number of parts will increase and the cost will increase. It should be noted that if there is only one rectifying plate, it can be manufactured by blow molding, which is inexpensive, but in this case, it is difficult to control the plate thickness, and as a result, the rectifying plate 24 becomes too thick. Therefore,
The pressure loss at the time of ventilation is large, and the noise also increases. On the other hand, in the latter ventilator structure, since the guide 35 with the rectifying blades 36 and 37 is inserted into the bent portion 33 of the duct 32 and assembled, an assembling error between the ventilator casing 34 and the duct 32 easily occurs, and There is a possibility that the positions of the blades 36 and 37 vary and the ventilation performance becomes unstable. In addition, the shape of the rectifying blades 36 and 37 is restricted in order not to hinder the insertion of the guide 35, and the molding die is complicated.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems. When the air passage of an air conditioner is bent near an air outlet, the present invention is caused by the bending of the air passage. It is an object of the present invention to mitigate a decrease in ventilation performance while avoiding that the structure of a duct portion of a register including a molding die is unnecessarily complicated and difficult to manufacture.

[0006]

This problem is solved by the invention described in the claims. That is, in the register of the present invention, the cross-sectional shape of the corner portion of the current-change wing body provided at the bent portion of the retainer is formed so as to be gentle for the inside portion of the corner and angular at the outside portion.
Therefore, the airflow flows along the inside of the gentle corner and changes its direction, so that the pressure loss at the bent portion is reduced and the air volume distribution at the outlet is made uniform. When manufacturing this register, for example, by setting a parting line so as to pass through the apex of the angular current-carrying airfoil, the mold (core) structure can be prevented from becoming complicated, and the integral molding can be performed relatively inexpensively. become able to. Thus, the ventilation performance and the manufacturability can be appropriately balanced.

Although the above-described current wing body is formed integrally with the retainer of the register, the present invention is not limited to this, and this technique can be applied to a bent portion such as a ventilation duct. That is,
At least one current-change wing body in which an inflow-side wing part extending toward the inflow-side opening of the duct body and an outlet-side wing part extending toward the outlet-side opening of the duct body are connected to the bent part of the duct body. Are disposed so as to cross the bent portion, and the current-change wing body and the duct body are integrally formed, and the corner of the current-change wing body formed by the inflow-side wing portion and the blow-out-side wing portion is formed. The cross section of the portion is formed to be gentle on the inside of the corner and angular on the outside. By applying this duct structure to a bent portion such as an air duct, the air volume distribution on the blowout side is made uniform. In addition, by adopting the shape of the above-mentioned current transformer wing, the complexity of the mold can be avoided, so that the duct component provided with the current transformer wing and having a uniform air volume distribution can be integrally formed at a relatively low cost. It can be manufactured.

[0008]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a partially cutaway perspective view of a register connected to a duct, and FIG. 2 is a longitudinal sectional view. FIG.
FIG. 2 is a cross-sectional view of the register and a view for explaining a ventilation structure in a retainer. The register 1 is attached to, for example, an instrument panel of an automobile, and has a configuration in which the register main body 2 includes a substantially cylindrical retainer 3 and a wind direction adjusting mechanism (not shown). A knob 4 provided at the outlet 3a of the retainer 3 is connected to the wind direction adjusting mechanism, and by operating the knob 4, a plurality of wind direction adjusting fins 5 can be synchronized and tilted. Has become. The end on the inlet side of the retainer 3 is fitted into the connecting portion 6 a of the duct 6. In addition,
FIG. 3 shows a vertical fin 5 ′ for convenience.

The retainer 3 is formed in a substantially rectangular tube shape in which the inlet side is bent by about 90 ° with respect to the outlet side as shown in the figure, and a bent flow path is formed through a bent portion 3c. Current changing blades 7 to 7 extending in a direction crossing the ventilation passage are arranged at predetermined intervals in the bent portion 3c. Note that the current-change wing body 7 extends in a direction substantially perpendicular to the plane including the streamlines before and after the fluid bends in the ventilation path (in the direction perpendicular to the plane of FIG. 3).

As shown in FIG. 3 and FIG.
Is a cross-sectional shape in which an inflow-side wing portion 7a extending toward the inflow port (connection portion with the duct 6) of the retainer 3 and an outlet-side wing portion 7b extending toward the outlet 3a of the retainer 3 are connected. It is formed in a substantially L-shape. The cross section of the corner portion formed by the inflow side wing portion 7a and the discharge side wing portion 7b is formed into a curved surface that draws a gentle circular arc substantially concentric with the bent portion 3c of the inside portion 7c of the corner. The outer portion 7d has an angular shape (in this example,
The opening angle of the corner is about 90 °).

The current wing body 7 and the retainer 3 are integrally formed. That is, the current-changing airfoil 7 disposed in the flow path of the retainer 3.
By adopting the shape described above, complication of the mold structure (particularly, the core portion structure) can be avoided, and the retainer 3 and the current-carrying blade 7 can be manufactured by injection molding at relatively low cost. That is, in the register 1 of the present embodiment, favorable ventilation performance can be obtained without increasing the number of parts by integrally forming the retainer 3 and the current-carrying blade body 7. By the way, as for this current-change wing body 7, the length dimension of the inflow-side wing part 7a and the discharge-side wing part 7b can be set sufficiently long as necessary.
In addition, the number and positions of the current-change wings 7 can be appropriately set according to the cross-sectional shape and the degree of bending of the flow path.

As shown schematically in FIG.
In the ventilation structure of the retainer 3, the bias of the wind passing through the retainer is reduced by the action of the current-change wings 7, and the air volume distribution at the outlet is substantially uniform. As a result, the maximum wind speed is lower than when the wind is deviated as in the conventional example, so that noise generated from the fins of the register 1 and the like is reduced. The duct 6 may be manufactured by blow molding as in the conventional case.

Next, the result of a comparison experiment between the register 1 of the present embodiment in which the retainer has a current-change wing body (see FIG. 1) and the conventional register without the current-change wing body (see FIGS. 6 and 7). Are shown in Table 1.

[0014]

[Table 1] As shown in the above table, in this embodiment, the pressure loss in the duct and the register is smaller than that in the conventional example, and the noise at the register outlet is lower.

Next, another embodiment of the present invention applied to a ventilation duct structure will be described. FIG. 5 shows a duct 8a,
An example is shown in which a current-change wing body 10 having the same configuration as the above-described current-change wing body 7 is provided at a corner of a curved duct 9 connecting the 8b. That is, it is possible to directly apply the configuration of the current transformer blade of the present invention to a bent portion of a general indoor air-conditioning duct, and to form a duct component in which the current transformer blade is integrally formed with a bent air passage. (Bent duct 9)
By using the, good ventilation performance can be obtained. This duct component is such that the current-carrying wing body 10 is
Similarly to the case described above, since the shape is suitable for injection molding, it can be manufactured at a relatively low cost.

[0016]

According to the register of the present invention, when the air passage of the air conditioner is bent near the outlet,
The deterioration of the ventilation performance due to the bending of the air passage can be mitigated while preventing the structure of the duct portion of the register from becoming unnecessarily complicated and difficult to manufacture. That is, compared to the conventional example, a low-noise register with a uniform air volume distribution at the outlet can be provided relatively inexpensively.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view of a register according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a cross-sectional view of a register illustrating a ventilation structure in a retainer.

FIG. 4 is a perspective view of a current transformer wing.

FIG. 5 is a partially cutaway perspective view illustrating a duct component according to another example.

FIG. 6 is a perspective view illustrating a conventional register.

FIG. 7 is a diagram illustrating a ventilation state of a conventional register.

FIG. 8 is a cross-sectional view illustrating a duct of a conventional air conditioner.

FIG. 9 is a cross-sectional view illustrating a conventional ventilator structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Register 2 Register main body 3 Retainer 6 Duct 7 Current-change wing body 7a Inlet-side wing part 7b Outlet-side wing part 7c Inside part of corner 7d Outside part of corner

Claims (1)

[Claims] 1. A register used by being connected to an air outlet side of an air passage, wherein a retainer of a register body forms a bent flow path, and a bent portion of the retainer is connected to the air passage. At least one current-change wing body in which an inflow-side wing portion extending toward the inflow-side opening of the retainer and an outlet-side wing portion extending toward the outlet-side opening of the retainer is connected to the bent portion. The current wing body and the retainer are integrally formed, and the cross-sectional shape of the corner portion of the current wing body formed by the inflow-side wing portion and the blow-out-side wing portion is the same as that of the corner. A register characterized in that the inner portion is formed smoothly and the outer portion is formed angularly.