JPS5922449Y2 - Mouse ring for refrigerator fan - Google Patents

Description

[Detailed Description of the Invention] Field of Application of the Invention The present invention relates to a mouth ring for a refrigerator fan, and more particularly to a mouth ring having a structure suitable for draining water well.

Prior Art As shown in Figure 2, the mouth ring for the fan, which is installed around the outer periphery of the cold air circulation fan of the conventional refrigerator, has a large taper θ on the cylindrical inner wall, which prevents the frost from adhering to the fan. When the defrost heater is energized, when dewdrops fall on the bottom of the inner wall of the mouth ring, they flow out from the inner wall of the mouth ring, accumulate at the bottom of the inner wall of the mouth ring, and when the cooling operation is restarted, the dew droplets fall onto the bottom of the inner wall of the mouth ring. This is to prevent freezing at the bottom of the inner wall.

However, in the conventional mouse ring shown in FIG. 2, when the dewdrop falls from the cylindrical side wall, it slightly passes over the lowest surface and climbs the opposite side wall, and then reaches the lowest surface of the cylindrical inner wall.

In other words, it follows the path ■@−○−■, and finally flows out to the outside due to the taper effect of the lowest surface.

Therefore, the taper of the lowest surface should be sufficiently large (30~
If it is not set (40°), water drainage will be poor, but if this is done, the gap between the fan and the mouth ring will become larger by the amount of the taper, and the cold air circulation efficiency will deteriorate, so this is not a preferable method.

Purpose of the invention The present invention was made in view of the above, and its purpose is to provide a mouth ring for a refrigerator fan that can drain water well without increasing the taper of the cylinder. .

Summary of the invention The feature of the invention is that the cylindrical inner wall of the mouth ring is provided with a protrusion of a minute height at the bottom to improve drainage.

Embodiments of the Invention The present invention will be explained below using embodiments shown in FIGS. 1, 3, and 4.

FIG. 1 is a sectional view showing an embodiment of a refrigerator equipped with a fan mouth ring according to the present invention.

In FIG. 1, 1 is a refrigerator compartment, 2 is a freezer compartment, and 3 is a partition having an evaporator inside.

A cold air circulation fan 4 is provided at the rear of the interior of the interior partition 3, and sucks cold air from inside the interior of the interior partition 3 and discharges it to predetermined cold air discharge ports of the refrigerator compartment 1 and the freezer compartment 2.

A fan mouth ring 6 according to the present invention fixed to an inner box 5 is provided on the outer periphery of the fan 4, and the gap between the outer periphery of the blades of the fan 4 and the inner wall of the mouth ring 6 is kept to a certain small dimension. It's safe.

7 is a defrosting heater.

The cylindrical diameter of the mouth ring 6 is larger on the inside of the refrigerator than on the opposite side. Therefore, the dewdrops on the inner wall of the mouth ring 6 flow toward the inside of the refrigerator, and the dewdrops inside the partition 3 It is designed to be received by a saucer 8 and drained to the outside.

FIG. 3 is a perspective view showing an embodiment of the fan mouth ring of the present invention.

On the lowest surface of the cylindrical inner wall of the mouth ring 6, there is formed a substantially triangular projection 6a with a very small height (0.3 to 0.5 mm) with its tip directed toward the inside of the chamber. It spans the entire width of the cylinder from front to back.

The substantially triangular protrusion 6a having such a small height acts so that when the dewdrops fall with acceleration from the inner wall of the cylinder during defrosting, the dewdrops immediately follow the ridgeline of the triangular protrusion 6a and flow out to the outside. do.

In other words, the dewdrops are drained in the order of ■-@-〇, and the mouth ring 6 drains very well.

FIG. 4 is a perspective view showing another embodiment of the fan mouth ring of the present invention.

In FIG. 4, a substantially triangular projection 6a is molded on the lowest surface of the inner wall of the mouse 97760 cylinder, as in FIG.
As shown in the figure, a plurality of ribs 6b having a small height and whose upper ridge lines are vertically inclined are provided on the inner side wall of the cylinder.

In this way, the draining effect is further improved.

Effects of the Invention As explained above, according to the present invention, water drainage can be improved without increasing the taper of the cylinder of the mouth ring, and the cold air circulation efficiency is not hindered.

[Brief explanation of the drawing]

Figure 1 is a sectional view showing an embodiment of a refrigerator equipped with a fan mouth ring according to the present invention, Figure 2 is a perspective view of a conventional fan mouth ring, and Figure 3 is a fan mouth ring according to the present invention. FIG. 4 is a perspective view showing another embodiment of the fan mouth ring of the present invention. 4...Cold air circulation fan, 6...Mouse ring for fan, 6a...Protrusion, 6b...
···rib.

Claims (1)

[Scope of utility model registration request] 1. A mouth ring for a freezer fan, characterized in that a substantially triangular protrusion of very small height is provided at the bottom of the cylindrical inner wall of the mouth ring for the fan, which is fixed at a constant interval around the outer periphery of a cold air circulation fan. . 2. A mouse for a refrigerator fan according to claim 1 of the registered utility model claim, characterized in that a substantially triangular protrusion of very small height is provided at the bottom of the inner wall of the mouse ring cylinder, with the tip facing toward the inside of the refrigerator. ring. 3. Mouth ring A mouth ring for a refrigerator fan according to claim 1, which is characterized in that a plurality of vertically inclined ribs of small height are provided on the inner wall of the cylinder of the mouth ring.