JPH01168514A - Air introduction device in air conditioner for automobile use - Google Patents

Abstract

PURPOSE:To prevent the occurrence of interference between two dampers and to increase an inner air suction amount without increasing the scale of a device, by a method wherein the axis of an inner and outer air switching damper is situated in the vicinity of a cross line between the top surface and the front of an inner and outer air switching box, and the axis of an inner air opening and closing damper in the vicinity of an intersection point between the front plate and the bottom plate thereof. CONSTITUTION:An axis 22 of an outer air switching damper 20 is placed in parallel to a cross line between a front plate 15b and a top surface 15a of an inner outer air switching box 15, and an outer air introduction port 16 and a first inner air introduction port 18 are switched to each other. Meanwhile, an axis 23 of an inner air opening closing damper 21 is situated in parallel to a cross line between the front plate 15b and a bottom plate 15d, and is rotated between a second inner air introduction port 19 and a bottom surface. This constitution, since an inner outer switching damper 20 and an inner air opening closing damper 21 are inwardly opened in a French window style, prevents the occurrence of mutual interference and enables increase of an inner air suction amount without increasing the scale of a device.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an air introduction device for an automobile air conditioner, and is capable of increasing the internal air intake volume without increasing the size of the blower device or the internal/external air switching box. The present invention relates to a suitable air introduction device.

[Conventional technology]

Regarding this type of air introduction device,
The technique described in Japanese Patent No. 12 is known. This known device guides the inside and outside air to the scroll casing using one outside air switching damper and one inside air opening/closing damper.

In the present invention, an inside/outside air switching damper refers to a damper that has the function of selectively blocking the intake of outside air or the intake of inside air, and also has the function of allowing inside and outside air to circulate at an arbitrary ratio. . Also.

In the present invention, the term "intra-air opening/closing damper" refers to a damper that has the function of blocking, suppressing, and releasing inhalation of internal air.

[Problem that the invention seeks to solve]

In the above conventional technology, when inside air is introduced, the inside/outside air opening/closing damper is located directly above the inside/outside air outlet;
The air entering from the two inside air inlets is blocked by the inside air opening/closing damper, resulting in a large passage resistance compared to the area of the inside air inlet. Even if two inside air inlets are installed to increase the inside air introduction area, No increase in intake air volume is expected,
There was a lack of consideration in this regard.

The present invention has been made to solve the above-mentioned problems, and its purpose is to:
The purpose of any of the above dampers is to provide an air introduction device that does not obstruct the intake air flow path of the blower device.

[Means for solving problems]

The above purpose is to arrange the shaft of the inside air opening/closing damper near the intersection of (a) the surface opposite to the surface having the outside air inlet, and (b) the surface having the inside air inlet, and This is achieved by supporting the opening/closing damper.

[Effect]

By configuring as above, when introducing internal air,
The outside air switching damper and the inside air opening/closing damper are not located in the airflow path between the inside and outside air outlet and the inside air inlet. That is, it does not obstruct air flow. Therefore, the incoming air flows smoothly in through the inside air inlet.

The air is guided to the outside air outlet, and the air volume increases commensurate with the area of the inside air inlet.

〔Example〕

FIGS. 2 and 3 are schematic illustrations of an automobile air conditioner to which the present invention is applied.

The automobile air conditioner includes a blower 1 installed in the cowl box 9. Cooler unit 2. The heater unit 3 includes a heater core 4. Air mix damper5. Defroster outlet 6. It has a ventilation blowout lower and a heater blowout port 8. The blower 1 includes a blower unit 10 and an air introduction device 14, and is disposed on the cowl side, and the blower unit 6110 includes a scroll casing 11, a blower motor 12, and a fan 13.

As shown in FIG. 1, in the air introduction device of this embodiment, an outside air introduction port 16 is formed on the top surface 15a of the outside air switching box 15 inside the hollow rectangular parallelepiped, and a scroll casing 11 is formed on the back plate 15c.
An internal/external air outlet 17 communicating with the inside of the internal/external air outlet 17 is provided.

Further, a first inside air introduction port 18 and a second inside air introduction port 19 are provided on the front plate 15b of the inside/outside air switching box. And within.

Inside the outside air switching box 15, an outside air switching damper 20 and an inside air opening/closing damper 21 are provided, which open and close the first inside air inlet 18 and the outside air inlet 16.

Among the above, the damper shaft 22 of the outside air switching damper 20 is provided substantially parallel to the line of intersection between the front box 15b and the top surface 15a. Further, the damper shaft 23 of the inside air opening/closing damper 21 is provided substantially parallel to the line of intersection between the front plate 15b and the bottom plate 15d. As a result, both dampers 20 and 21 are opened inward (arrow A, arrow B).
Do not cover the internal and external air outlets.

As shown in FIG. 4, levers 24 and 25 are attached to the shaft 22 of the inside/outside air switching damper 20 and the shaft 23 of the inside/outside air opening/closing damper 21, respectively.
are connected by a rod 26 and interlock. and internal air by a wire 27 connected to the end of the lever 24;
It is configured so that a predetermined mode of outside air or inside/outside air can be selected.

In this manner, the air introduction device of this example can be installed with the first and second internal air introduction ports 18, 19 facing either the passenger side or the engine side. In this example,
By activating the wire 27 and operating the lever 24.25, the inside/outside air switching damper 20 and the inside air opening/closing damper 2 are activated.
The opening degree is adjusted in synchronization with 1. Blower device 1
0 is activated, outside air α is introduced from the outside air introduction port 16 and inside air β is introduced from the first inside air introduction port 18 according to the opening degree of the inside/outside air switching damper 20. In addition, the inside air γ is introduced into the inside/outside air switching box 15 according to the opening degree of the inside air opening/closing damper 21, and these outside air α, inside air β, γ, and their mixture are passed from the outside air outlet 17 to the scroll casing 11.
The air is guided inside and is sent out from an outlet (not shown) by the blowing action of the fan 13 of the blower device 10.

In particular, when introducing inside air, the inside/outside air switching damper 20 and the inside air opening/closing damper 21 form a linear air path from the first inside air inlet 18 and the second inside air inlet 19 to the outside air outlet 17. It is. That is, the air passage can be formed in a state where there is almost no ventilation resistance to the intake air flow.

〔Effect of the invention〕

When the air introduction device of the present invention is applied, the following effects can be obtained compared to the conventional technology.

(i) An inside air opening/closing damper (21
) is not coming, so the two inside air inlets are connected to the outside air outlet (
17) There is extremely little resistance to the airflow directed to the airflow.

(ii) As a result, the airflow does not become turbulent, so there are fewer vortices and less noise.

(iii) As a result of the above item (i), the discharge air volume increases even if the area of the inside air inlet is the same. That is, in the conventional device, the air introduced from the two inside air intake ports is completely divided into two by the inside air opening/closing damper, and separately enters the inside and outside air outlets.

Therefore, the cross-sectional area through which air passes is significantly reduced. On the other hand, air flows through areas with low ventilation resistance. For this reason, the present invention, which does not divide the inside and outside air outlets into two, increases the air volume.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing one embodiment of the present invention. FIGS. 2 and 3 are explanatory diagrams of an automobile air conditioner to which the present invention is applied. FIG. 4 is a perspective view of the embodiment. DESCRIPTION OF SYMBOLS 10... Blower device, 11... Scroll casing, 13... Fan, 15... Inside, outside air switching box, 1
5a...Switching box top surface, 15b...Switching box bottom plate, 1
5c...Switching box bottom plate, 15d...Switching box bottom plate,
16...Outside air inlet, 17...Inside and outside air outlet, 18
...First inside air introduction port, 19...Second inside air introduction port, 2
0... Inner/outside air switching damper, 21... Inner air opening/closing damper, 22.23... Damper shaft. 2nd concave de

Claims (1)

[Claims] 1. In an air introduction device that is attached to a blower device of an automobile air conditioner and has the function of regulating the intake of outside air and inside air, (a) a top surface, a bottom plate, a substantially perpendicular front plate, and a surface plate substantially parallel thereto; (b) a blower device is attached to the back plate of the switching box, and an outside air outlet is provided in the back plate that communicates with the intake port of the blower device; (c) providing an outside air inlet on the top surface; (d) providing a first inside air inlet near the upper half of the front plate and a second inside air inlet near the lower half; (e) The damper shaft is positioned parallel to the intersection line between the front plate and the top surface, and an outside air switching damper is provided, and the damper is positioned at a position that covers (a) the outside air inlet, and (b) (f) An inside air opening/closing damper with a damper shaft positioned parallel to the intersection line of the front plate and the bottom plate is provided, and The damper is
(a) It has a structure that rotates between a position covering the second inside air inlet and (b) a position close to and facing the bottom plate, and (g) the above pair of dampers is configured to switch between inside and outside air. inside the box,
An air introduction device for an air conditioner for an automobile, characterized in that the air introduction device for an air conditioner for an automobile is configured to operate in a double-door manner so as not to block the inside and outside air outlet.