JP2870968B2 - Cross flow type blower for vehicles - Google Patents

Description

The present invention relates to a cross-flow type blower used for an air conditioner and the like, and is applied to, for example, a rear cooler for a vehicle.

(Prior art) Conventionally, a cross-flow type blower often used for an indoor air conditioner or the like is generally reduced in ventilation resistance because its characteristics are controlled by an eccentric vortex generated inside the blower. I have.

For example, in the one disclosed in JP-A-63-280892,
As shown in FIG. 5, air that is vertically arranged along a wall for indoor use and that has been sucked in through a filter 3 from a suction port 2 of a casing 1 is blown out from a blowout port 5 by an impeller 4, A part of the air blown out from the air outlet 5 is re-input as shown by a dotted line from the opening 8 between the tongue 6 and the second tongue 7, thereby reducing the ventilation resistance and stabilizing the eccentric vortex. It is trying to make it.

(Problems to be Solved by the Invention) Such a conventional cross-flow type blower has recently been used also as a rear cooler for vehicles, taking advantage of the feature that the product can be made thinner and the outlet can be widely used. .

However, when the conventional cross-flow type blower is used for a rear cooler or the like for a vehicle, the blower is attached to the ceiling of the vehicle while being rotated approximately 90 ° counterclockwise from the position shown in FIG. There is a problem that water drops dripping from an opening 8 formed between the second tongue 6 and the second tongue 7.

The present invention has been made to solve such a problem, and by improving a blower case, it is possible to reduce the ventilation resistance to stabilize an eccentric vortex, and to reduce the thickness of a vehicle cloth that does not drop water drops. An object is to provide a flow type blower.

(Means for Solving the Problems) For that purpose, a cross flow blower for a vehicle according to the present invention comprises:
A casing having an inlet and an outlet, a cross-flow type impeller rotatably mounted in the casing, and an evaporator provided in the casing downstream of the inlet and upstream of the impeller. A tongue positioned below the impeller and forming a gap with the casing lower part; a side plate provided at both ends of the tongue and having an opening; And a projection formed integrally with the lower portion of the casing so as to form a gap with the tongue body, and passing through the opening to a drain groove outside the casing. Adopt a configuration that

(Operation) According to the cross flow type blower for a vehicle of the present invention, the air extruded by the rotation of the impeller is, for example, as shown in FIG. 4, in addition to the air flowing from the suction port on the upstream side of the impeller. The air flows into the impeller through the lower part of the tongue from the opening of the side plate and the air flows into the impeller through the downstream part of the air outlet. Can partially improve the inflow angle and reduce ventilation resistance.
According to this configuration, the eccentric vortex is stabilized by supplying a part of the air blown out from the outlet to the suction through the gap. In addition, the condensed water generated by the evaporator is guided by the convex portion provided below the tongue body, and is guided to the drainage groove outside the casing through the opening. For this reason, dripping of condensed water is prevented.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

1 to 3 show a cross flow type blower for a vehicle according to an embodiment of the present invention.

A cross-flow type blower 11 is mounted on a ceiling plate 10 of a vehicle. The casing 12 of the blower 11 is made of resin and has an inlet 13 for taking in air and an outlet 14 for blowing out air, and a lower casing portion 12a for guiding the air flow has a central portion 12e on both sides as shown in FIG. It is curved so as to be slightly concave above the end.

An evaporator 15 is provided at a downstream portion of the suction port 13 of the casing 12, and an impeller 16 having a rotation axis in a direction orthogonal to the air flow is attached to the downstream portion so as to be rotatable clockwise in FIG. Above the impeller 16, a rear guide 17 for guiding the air pushed out by the blade 16a of the impeller 16 is provided.
Are installed along the axial direction.

Then, the casing lower part 12 between the inlet 13 and the outlet 14
In a, the first convex portion 18 on the suction side, the second convex portion 19 on the central portion, and the third convex portion 20 on the discharge side protrude upward so that water droplets do not leak from the suction port 13 or the discharge port 14. Have been.
As shown in FIG. 3, the left and right end portions 12c and 12d of the casing lower portion 12a are relatively lower than the central portion 12e,
Drainage grooves 25 are open at both ends.

As shown in FIG. 2, a tongue 22 extends downward from the lower end 12b of the casing and extends downward from the lower end 12b of the casing at the downstream side of the impeller 16, as shown in FIG.
Both side ends of the tongue 22 are attached to the side plate 24. The side plate 24 is provided at a position inside the casing lower end 12b. A gap A is formed between the tongue body 22 and the casing lower part 12a.
The third convex portion 20 is formed in the inside. The gap A formed at the lower part of the tongue body 22 is set to an interval such that air flows smoothly. This is because if the interval of the gap A is too small, the eccentric vortex tends to be unstable, and if the interval is too large, the amount of air passing through the evaporator 15 is excessively reduced.

 Next, the flow of air will be described.

Air that has entered the casing 12 from the suction port 13 in the first illustrated arrow B direction passes through the evaporator 15 from the first illustrated arrow C, and most of the air flows in the first illustrated arrow D direction and passes through the impeller 16. And blows out from the outlet 14 in the direction of arrow E.

As shown in FIG. 2, a part of the air passing through the evaporator 15 passes through the outside of the side plate 24 and flows from the opening 26 toward the lower side of the tongue body 22 in the second direction indicated by arrow F in FIG. In the illustrated arrow G direction, the air flows from the outlet to the lower side of the tongue body 22 and flows from the lower side of the tongue body bent portion 22a in the first illustrated arrow H direction, and together with the air in the first illustrated arrow D direction, the impeller 16 Flows into. For this reason, the vortex is stabilized by the circulating flow of the air entering from the lower part of the tongue body 22, and the ventilation resistance is reduced. The overall flow of air in this case is as shown by the arrows in FIG.

The water collected on the upper surface of the casing lower part 12a is guided by the first convex part 18, the second convex part 19 and the third convex part 20 along the arc shape of the vehicle ceiling part, and flows to the casing side end part,
The water flows out of the drain groove 25 without leaking to the outside of the casing.

In the present embodiment, the air flowing out of the air outlet 14 is allowed to flow into the impeller 16 again through the gap A.
As another embodiment of the present invention, only the flow that passes through the outside of the side plate, passes through the opening, passes from the lower side of the tongue to below the tongue bent portion, and flows into the impeller, and the A configuration without recirculation may be adopted. The opening is formed by a notch, a hole or the like formed in the side plate, but the shape of the opening is, of course, not limited.

(Effects of the Invention) As described above, according to the cross flow type blower for a vehicle of the present invention, it is possible to reliably prevent the water droplets stored in the casing from leaking to the outside,
Air is introduced into the gap at the lower part of the tongue from the sides and the air outlet, and this air is mixed with the main flow of air from the upstream side of the impeller, so that the inflow angle to the impeller can be partially improved, This has the effect of reducing ventilation resistance and stabilizing unstable eccentric vortices downstream of the impeller.

[Brief description of the drawings]

1 is a sectional view showing a cross flow type blower for a vehicle according to an embodiment of the present invention, FIG. 2 is a partial perspective view showing the cross flow type blower for a vehicle, and FIG.
FIG. 4 is an explanatory view showing the flow of air in the blower according to the embodiment of the present invention, and FIG. 5 is a sectional view showing a conventional example. 11 Cross-flow blower, 12 Casing, 12a Lower casing, 13 Inlet, 14 Outlet, 16 Impeller, 18, 19, 20 Convex, 22 Tongue body, 22a ... Bend of tongue body, 24 ... Side plate, 26 ... Opening.

Claims (1)

(57) [Claims] A casing having a suction port and an air outlet; a cross-flow type impeller rotatably mounted in the casing; and a downstream side of the suction port and an upstream side of the impeller in the casing. An evaporator provided on a tongue body located below the impeller and provided to form a gap with the casing lower part; a side plate provided at both ends of the tongue body and having an opening; A projection provided below the tongue body, integrally formed with a lower portion of the casing so as to form a gap with the tongue body, and being led through the opening to a drainage groove outside the casing. Cross flow type blower for vehicles characterized by the above-mentioned.