KR100635814B1 - an air blower for a refrigerator - Google Patents

Abstract

The present invention relates to a blower used in the refrigerator, and more particularly, to maximize the blowing force of the blower is provided inside the refrigerator to circulate cold air,

A scroll fan having a plurality of blades formed in a streamlined shape at an outer circumference thereof, and a mounting shaft formed at the center thereof; A blower is formed on one side and the scroll fan is built-in; An upper scroll in which an inlet hole is formed so that a motor shaft of a motor installed at an upper portion thereof is coupled to a mounting shaft of the scroll fan and introduces cold air into the lower scroll; It relates to a blower for a refrigerator comprising a; backflow preventing means for preventing the backflow of the cold air flows when blowing in the shroud formed at the end of the inlet hole.

Description

An air blower for a refrigerator

1 is a perspective view schematically illustrating main parts of a blower used in a refrigerator.

2 shows a schematic plan view of the main part according to FIG. 1;

3 is a schematic longitudinal cross-sectional view according to FIG. 1;

Figure 4 is a perspective view of the main portion schematically showing the blower of the present invention.

5 shows a schematic plan view of the main part according to FIG. 4;

6 is a schematic longitudinal cross-sectional view according to FIG. 4;

Figure 7 is a longitudinal cross-sectional view schematically showing another embodiment of the present invention.

Explanation of symbols for the main parts of the drawings

10: countercurrent prevention means

   12: auxiliary breaker 12a: breaker

100: blower

   110: Haskroll 112: Vents

   120: upper scroll 121: shroud

   122: inlet hole 124: support

200: scroll fan

   202: blade 204: mounting shaft

300: motor

   302: motor shaft

L: radial distance

The present invention relates to a blower used in a refrigerator, and more particularly, to a blower for a refrigerator provided in the refrigerator to maximize the blowing force of the blower for circulating cold air.

In general, a refrigerator is used for the purpose of freezing and refrigerating foods in a refrigerator by changing phase of a refrigerant by using a principle of a refrigeration cycle that performs compression-condensation-expansion-evaporation process continuously.

Thus, in order to freeze and refrigerate food in the refrigerator, the food is circulated to a freezing compartment or a refrigerating chamber which requires cold air. A blower is provided inside the refrigerator to circulate the cold air.

As described above with reference to Figures 1 to 3 attached to the blower 100 provided in the refrigerator to blow the cold air, the air outlet 112 connected to the connection duct and the like to blow the cold air to one side ) Is formed to have a plurality of blades 202 in a streamlined outer periphery and a scroll fan 200 having a mounting shaft 204 formed therein, and a center of the lower scroll 110 corresponding to the lower scroll. The inlet hole 122 through which cold air is introduced is formed and coupled to the upper scroll 120 and the motor 300 mounted by a plurality of supports 124 formed in the outer upper scroll 120 of the inlet hole. The motor shaft 302 is configured to be coupled to the mounting shaft of the scroll fan.

In the above, the inner end of the blade 202 of the scroll fan 200 is formed into the shroud 121 formed in a curved shape at the end of the inlet hole 122 of the upper scroll 120, that is to be located within the diameter .

The blower configured as described above is driven as power is applied to the motor, and the scroll fan rotates in the upper and lower scrolls by the driving, and the inflow formed in the upper scroll due to the suction force by the rotation of the scroll fan. The cold air to be blown through the ball is sucked and at the same time, the sucked cold air is blown to the required place through the blower.

However, in the conventional blower 100 configured as described above and used in the refrigerator, the inner end of the blade 202 of the scroll fan 200 is formed at the end of the inlet hole 122 of the upper scroll 120. Since it is located inward of the wood 121, a radial distance (L) spaced a predetermined distance is formed between the inner end of the blade and the end of the shroud, the cold air through the radial distance (L) In the process of inhaling and blowing air, a portion of the cold air flows back through the inflow hole (back-flow).

Accordingly, some of the cold air blown through the inlet hole through the inlet hole by the radial distance formed between the inner end of the blade and the end of the shroud is reversed, resulting in a decrease in the blowing force, thereby causing a freezer compartment. However, the freezing and refrigerating ability of the refrigerating compartment also caused a problem that is significantly reduced.

Accordingly, the present invention has been made to solve the conventional problems as described above, the object is to maximize the blowing force of the blower is provided in the refrigerator to blow cold air.

The present invention for achieving the above object, a plurality of blades are formed in a streamlined outer periphery and the scroll fan is formed in the center of the mounting shaft; A blower is formed on one side and the scroll fan is built-in; An upper scroll in which an inlet hole is formed so that a motor shaft of a motor installed at an upper portion thereof is coupled to a mounting shaft of the scroll fan and introduces cold air into the lower scroll; A back flow prevention means for preventing an inflow of cold air flowing in the air flow by extending from the shroud formed at the end of the inlet to an inner end of the auxiliary blocking part integrally extending to an adjacent point of the blade end; It is characterized by.

delete

delete

A radial distance between the end of the backflow prevention means and the inner end of the blade is characterized in that it is formed within 5mm.

It characterized in that the radial distance between the end of the backflow prevention means and the inner end of the blade to match.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

4 is a perspective view illustrating main parts of the blower of the present invention, FIG. 5 is a schematic plan view of the main part of FIG. 4, and FIG. 6 is a schematic longitudinal sectional view of the part of FIG. 4.

As shown in the drawing, a plurality of blades 202 are formed in a streamlined shape on the outer circumference and a mounting shaft 204 is formed in the center so that cold air can be blown to a freezing compartment, a refrigerating compartment, an ice making compartment, or the like, which is provided in the refrigerator. A fan 200;

A blow scroll 112 formed at one side to be connected to a connection duct connected to a portion to supply cold air in the refrigerator, and the scroll fan 200 having the scroll fan 200 therein;

The motor shaft 302 of the motor 300 installed by the support 124 in the upper portion is coupled to the mounting shaft 204 of the scroll fan 200 to introduce cold air into the lower scroll 110 ( An upper scroll 120 on which 122 is formed;

It shows the blower 100 is configured to include a backflow preventing means 10 for preventing the cold air flowing in when the air flows in the shroud 121 formed at the end of the inlet hole 122 through the inlet hole. .

In other words, the backflow prevention means 10 of the present invention formed in the shroud 121 formed at the end of the inflow hole 122 may be a freezing chamber, a refrigerating chamber, or an ice making chamber required by the blower 100. When the cool air is blown, after the cool air flows into the inlet of the upper scroll, a predetermined distance is spaced between the inner end of the blade 202 and the shroud 121 formed at the end of the inlet hole 122 formed in the upper scroll 120. By minimizing the distance (L) in the radial direction is formed to prevent the phenomenon that the cold air flowed in through the inlet backflow is to have a condition to maximize the blowing force.

Accordingly, it is possible to maximize the blowing power of the cold air to be blown through the blower, so that the freezing and refrigerating ability of the freezing chamber, the refrigerating chamber, and the ice making chamber in which the cold air is blown is provided.

In addition, the present invention is to have a condition that can be smoothly supplied without deteriorating the freezing or refrigerating capacity even when supplying cold air to a relatively distant portion, such as an ice-making room that is provided separately in recent years as the blowing force is increased. .

The backflow prevention means 10 is preferably formed as an auxiliary blocking portion 12 extending integrally inward from the shroud 121 formed in a curved shape at the end of the inflow hole 122, as necessary May be manufactured by attaching the auxiliary blocking unit separately.

It is preferable to form the gap G between the end of the auxiliary blocking part 12 and the inner end of the blade 202 of the scroll fan 200 within 5 mm, that is, 0 to 5 mm.

In other words, the end of the auxiliary blocking portion 12 to have the innermost end of the blade 202 of the scroll fan 200 with the narrowest radial distance (L), the narrower the radial distance is inflow This is to minimize the reflux of the cold air sucked through the ball, as well as to ensure maximum blowing power.

If this is proved through the experiment in more detail, it can be seen through the graph of [Table 1] and [Figure 1] of the following experimental data.

TABLE 1 Experimental data measuring the air velocity blown through the air vent when the radial distance formed at the end of the auxiliary blocking portion and the inner end of the blade is 0-8 mm

[Figure 1]. Graph showing the experimental data measured by the [Table 1]

As shown, the radial distance between the end of the auxiliary blocking unit 12 and the inner end of the blade 202 of the scroll fan 200 as shown in the data calculated through a plurality of experiments with different radial distances ( When L) is kept between 0 and 5 mm, that is, when the radial distance L is within 5 mm, the average value of the flow rate data measured at the tuyeres from the primary to the third is calculated as an average value. It can be seen that the blowing capacity is increased by maintaining an average flow rate of ㎧ or more.

In addition, in the case where the radial distance L is 6 to 8 mm, which is 5 mm or more, if the data value measured from the first to the third degree is calculated as an average value, it has a flow velocity of about 14.0 kPa or less. It can confirm that a blowing force falls compared with maintaining the radial distance of 5 mm or less.

Accordingly, the gap between the end of the auxiliary blocking portion and the inner edge of the blade is maintained at 0 to 5 mm, thereby minimizing the backflow of the cold air introduced through the inflow hole, thereby providing a condition for further increasing the blowing ability. .

On the other hand, when the blowing ability is the best, when the end of the auxiliary blocking portion 121 and the radial distance (L) in the radial direction of the inner end of the blade 202 is set to 0mm, the experiment up to the third degree of the ear canal When the average value is calculated based on the data, the flow rate is maintained at about 14.7 kPa or more, and it can be confirmed that it has the highest blowing force.

Therefore, the end of the auxiliary blocking portion and the blade inner end of the scroll fan to maintain the narrowest radial distance as possible or to form the same position, so that the reverse flow of the cold air flowed through the inlet hole and then blown Not only prevention, but also the blowing force to maximize the condition.

7 is a longitudinal cross-sectional view schematically showing another embodiment of the present invention.

As shown in the above configuration, the reverse flow prevention means 10 formed at the end of the inlet hole to form a separate auxiliary block from the shroud 121 formed in a curved shape at the end of the inlet hole 122 Rather, the end of the shroud 121 is formed to extend to the adjacent point of the end of the blade 202.

Accordingly, the upper scroll is formed more easily than the auxiliary blocking portion formed in the shroud of the inlet hole when forming the upper scroll, as well as the cold air introduced through the inlet hole during blowing as described above. It is to play a role that can be prevented from flowing back by the portion extending in the shroud.

Therefore, the cold air to be blown is also prevented from flowing back after it is introduced through the inlet hole, thereby increasing the blowing capacity as much as possible.

As described above, the present invention provides a cold air blown by the blower by preventing a backflow as well as maximizing a blowing force by a backflow preventing means provided as a portion into which cold air is introduced from a blower provided in the refrigerator to circulate cold air. Due to the increase in the blowing power of the freezer or refrigerating chamber or the ice making room, such as having the effect of maximizing the freezing capacity.

In addition, due to the increase in the blowing force has a side effect that can be easily blown even at a relatively long distance where cold air is required.

Claims (5)

delete delete A scroll fan having a plurality of blades formed in a streamlined shape at an outer circumference thereof, and a mounting shaft formed at the center thereof; A blower is formed on one side and the scroll fan is built-in; An upper scroll in which an inlet hole is formed so that a motor shaft of a motor installed at an upper portion thereof is coupled to a mounting shaft of the scroll fan and introduces cold air into the lower scroll; A back flow prevention means for preventing an inflow of cold air flowing in the air flow by extending from the shroud formed at the end of the inlet to an inner end of the auxiliary blocking part integrally extending to an adjacent point of the blade end; Refrigerator blower, characterized in that. The blower according to claim 3, wherein a radial distance between an end of the backflow preventing means and an inner end of the blade is formed within 5 mm. The blower of claim 3, wherein a radial distance between an end of the backflow preventing means and an inner end of the blade is coincident with each other.

Images