KR100241448B1 - Cool air circulator of refrigerator - Google Patents

Abstract

The present invention relates to a cold air circulation device of a refrigerator, and conventionally, a shroud is installed to distribute cold air to a freezer compartment and a refrigerating compartment. Resonance noise of cold air is generated in the space, and the evaporator and the axial fan are installed on one side of the freezer compartment so that when the cold air is distributed to the refrigerating chamber, a long flow path must be passed, thus acting as a cause of a considerably large flow path resistance. The inside of the main body 10 is divided into a freezing compartment 20 and a refrigerating compartment 30 by an intermediate partition 40; An evaporator 60 for exchanging cold air and a cross-flow fan 50 for adjusting the flow rate of cold air are provided at a central portion of the intermediate partition 40 at predetermined intervals; The outer periphery of the cross flow fan (50) is provided with a cold air circulation device of the refrigerator, characterized in that the housing 51 for adjusting and distributing the flow direction of the cold air, thereby reducing the heat loss generated when opening or closing the refrigerating compartment or freezer door By controlling the rotation speed of the cross flow fan and the angle of the distribution plate, the cold air is supplied to the place where the heat loss occurs, thereby eliminating the temperature unevenness of the refrigerator and achieving uniform cooling at all times.

Description

Cold air circulation unit of refrigerator {COOL AIR CIRCULATOR OF REFRIGERATOR}

The present invention relates to a refrigerator, and more particularly, to a cold air circulation device for eliminating temperature unevenness in a refrigerator.

In the refrigerator according to the prior art, as shown in FIG. 1, the interior of the main body 1 is partitioned into a freezing compartment 2 and a refrigerating compartment 3 by an intermediate partition 4, among which the freezing compartment 2 of the freezer compartment 2 is formed. At the rear, the cooling chamber including the axial fan 6 and the evaporator 5 is installed in a state where a predetermined interval is maintained, and in front of the shroud S and the grill pan 7 are provided with a predetermined space. In the grill pan 7, several cold air discharge holes 7a are formed at a predetermined interval in the lateral direction.

A cold air discharge duct 11 is formed at the rear of the refrigerating chamber 3 to communicate with the cooling chamber and to supply the cold air by the rotation of the axial fan 6 to the refrigerating chamber 3, and the cold air discharge duct 11. The upper end of the) is provided with a damper 10 for adjusting the flow rate of the cold air, and a plurality of duct shelves 12 are inserted into the lower side of the damper 10 is fixed.

In addition, the intermediate partition 4 is provided with a freezer compartment suction duct 8 and a refrigerator compartment suction duct 9 for introducing cold air circulated through the freezer compartment 2 and the refrigerating compartment 3 back to the evaporator 5.

The cold air circulation device of the conventional refrigerator configured as described above is configured to distribute cold air to the freezer compartment 2 and the refrigerating compartment 3 by the axial flow fan 6 and the shroud S in the refrigerator. The cold air discharged by (7) flows into the freezer compartment suction duct (8) and circulates through the intermediate partition (4) to the evaporator (5) and the axial fan (6), and the cold air circulation of the refrigerator compartment (3) is shroud ( The cold air distributed in S) is discharged by the cold air discharge duct 11 after the cold air flow rate is adjusted by the damper 10, and the refrigerating chamber suction duct 9, the intermediate partition 4, the evaporator 5, and the axial fan ( The flow path is formed in the order of 6).

In the refrigerator illustrated in FIG. 2, the inside of the main body 1 is divided into a freezing compartment 2 and a refrigerating compartment 3 by an intermediate partition 4 ′, and an evaporator ( 5 ') and the axial flow fan 6' are installed in a state where a predetermined interval is maintained, and a rear side of the freezing chamber 2 is provided with a grill pan having a plurality of cold air discharge holes 7a at a predetermined interval in the lateral direction. (7) is provided, and a cold air discharge duct (11) is formed in communication with the cooling chamber at the rear of the refrigerating chamber (3), and a damper (10) is provided at the upper end of the cold air discharge duct (11). Several duct shelves 12 are inserted and fixed below the damper 10.

The intermediate partition 4 ′ is provided with a freezer compartment suction duct 8 and a freezer compartment suction duct 9 for introducing cold air circulated through the freezer compartment 2 and the refrigerating compartment 3 back to the evaporator 5 ′.

In the refrigerator configured as described above, cold air cooled while passing through the evaporator 5 'is pumped through the grill pan 7 by the axial flow fan 6' into the freezer compartment 2, and the blown cold air is stored in the freezer compartment. After circulating (2), it is returned to the evaporator 5 'through the freezer compartment suction duct 8 formed at the lower side of the grill pan 7, and is not discharged to the freezer compartment 2 by the grill pan 7. The cold air falls naturally into the refrigerating chamber duct 11, and the cold air flowing into the refrigerating chamber duct 11 passes through the respective duct shelves 12 communicating with the refrigerating chamber duct 11 to the refrigerating chamber 3. The cold air circulated through the respective duct shelves 12 is ejected into the refrigerating chamber suction duct 9 and is introduced into the evaporator 5 '.

However, the prior art shown in Figure 1 has a shroud (S) to distribute the cold air to the freezer compartment (2) and the refrigerating compartment (3), the shroud (S) occupies a significant portion of the freezer compartment effective volume, cold air There was a problem that the resonance noise of the cold air occurs in a predetermined space between the shroud (S) and the grill pan (7) during circulation.

Another problem of the prior art is that the evaporator 5 and the axial fan 6 are installed on one side of the freezing chamber 2 so that when the cold air is distributed to the refrigerating chamber 3, a long flow path must be passed, causing a considerably large flow path resistance. There was a problem becoming.

In addition, in the related art shown in FIG. 2, cold air is circulated by the axial fan 6 ', and thus the volume of the evaporator 5' is relatively large, and thus acts as a flow resistance factor of the cold air. There was a problem in that it does not distribute the cold air to the refrigerating chamber (3). In addition, the axial fan 6 ′ has a limit in increasing its size when compared to a volume of a predetermined cooling chamber, thereby lowering the reliability of the freezing and refrigerating efficiency.

Accordingly, the present invention has been made in order to solve the above-mentioned conventional problems, to provide a cold air circulation apparatus of the refrigerator by increasing the effective content of the freezer compartment by moving the evaporator of the freezer compartment to the center of the refrigerator and without using the shroud. There is this.

Another object of the present invention is to provide a cold air circulation device of a refrigerator which can expect a noise reduction effect by reducing the flow resistance of cold air due to an increase in the effective content of the refrigerator.

Still another object of the present invention is to detect heat loss generated when opening or closing a door of a refrigerating compartment or a freezing compartment from a sensor external to the refrigerator to automatically control the rotation speed of the crossflow fan and the distribution plate of the housing to concentrate the heat loss. It is to provide a cold air circulation device of the refrigerator that can expect the optimum uniform cooling effect by supplying cold air.

1 is a side cross-sectional view of a refrigerator schematically showing a cold air circulation process of a conventional refrigerator.

Figure 2 is a side cross-sectional view of a refrigerator showing another conventional embodiment.

Figure 3 is a side sectional view showing a cold air circulation device of the refrigerator according to the present invention.

Figure 4 is a front sectional view showing a cold air circulation device of the refrigerator according to the present invention.

5 is a detailed view of the crossflow fan and the housing according to the present invention.

** Explanation of symbols for main parts of drawings **

10; Main body 20; Freezer

21; Grill pan 21a; Cold air discharge

22; Freezer suction duct 30; Cold room

31; Cold discharge duct 32; Cold room suction duct

40; Intermediate bulkhead 50; Crossflow fan

60; Cold air distribution housing 61a; Cold air inlet

62; Freezer compartment plates 63; Cold room distribution plate

70; evaporator

The present invention for achieving the above object is an evaporator installed in the central portion of the middle partition partitioning the interior of the main body into the freezer compartment and the refrigerating compartment and heat exchange the air circulating in the interior, and the cold air supplied from the evaporator installed in the rear of the evaporator It is provided with a cross flow fan for supplying to the freezer compartment and the refrigerating compartment, and a cold air distribution housing installed on the outer periphery of the cross flow fan to adjust and distribute the flow direction of the cold air is provided.

Hereinafter, an embodiment of a cold air circulation device of a refrigerator according to the present invention will be described in detail with reference to the accompanying drawings.

In the refrigerator according to the present invention, as shown in FIGS. 3 and 4, the interior of the main body 10 is partitioned into a freezer compartment 20 and a refrigerating compartment 30 by an intermediate partition 40, and the intermediate partition 40 The evaporator 70 and the cross flow fan 50, which have a relatively reduced volume, are installed at a central portion of the c) while maintaining a predetermined interval, and several cold air discharge holes 21a are formed at the rear of the freezing chamber 20. The grill pan 21 is provided.

In addition, a cold air discharge duct 31 is formed at a rear of the refrigerating chamber 30 partitioned by the intermediate partition 40 to supply the cold air by the rotation of the cross flow fan 50 to the refrigerating chamber 30. Several duct shelves 33 are inserted and fixed to one side of the duct 31.

On the other hand, the intermediate partition 40 is formed with a freezer compartment suction duct 22 and a cold compartment suction duct 32 for introducing cold air circulated through the freezer compartment 20 and the refrigerating compartment 30 back to the evaporator 70.

In addition, as shown in Figure 5, the outer periphery of the cross flow fan 50 has a cold air distribution housing 60 that can be adjusted to distribute the cold air heat exchanged in the evaporator 70 to the freezing chamber 20 and the refrigerating chamber 30 The cold air distribution housing 60 has a body 61 that is installed to surround the cross flow fan 50 and a cold air introduced by being hinged to the upper and lower ends of the body 61 to adjust the angle. It is composed of a freezer compartment distribution plate 62 for ejecting into the freezer compartment 20 and a freezer compartment distribution plate 63 for ejecting into the refrigerating compartment 30, the body 61 for introducing cold air heat exchanged from the evaporator. The cold air inlet 61a is formed through.

Referring to the operation of the refrigerator of the present invention configured as described above in detail.

When power is applied to the refrigerator, the cold air heat exchanged by the evaporator 70 installed at the rear of the freezer compartment 20 is partially supplied to the refrigerator compartment 30 through the cold air discharge duct 31 by the rotation of the cross flow fan 50. The remainder is supplied to the freezing chamber 20 through the cold air discharge hole 21a of the grill pan 21.

At this time, the circulation of the cold air is made by the crossflow fan 50. The cold air is controlled by the freezing compartment distribution plate 51a and the refrigerating compartment distribution plate 51b coupled to the cold air distribution housing 60. The freezing chamber 20 is discharged through the cold air discharge duct 31 through the grill pan 21 and the refrigerating chamber 30 along the rear wall of the refrigerator.

The cold air sucked as described above is introduced along the intermediate partition wall 40 through a freezing chamber suction duct 22 and the refrigerator compartment suction duct 32, respectively, before being introduced into the evaporator 70, and reintroduced into the evaporator 70. The process is repeated.

On the other hand, if the heat loss occurs when hot air from the outside of the refrigerator enters the inside when opening or closing the door of the freezing compartment 20 or the refrigerating compartment 30, the temperature is sensed by a sensor not shown outside the refrigerator to detect the cross flow fan 50. By adjusting the number of revolutions and the angle of each distribution plate (51a, 51b) of the cold air distribution housing 60 surrounding the crossflow fan 50 to adjust the amount of cold air flow to focus the cold air to the place where heat loss occurred To ensure optimum cooling at all times.

That is, when the door of the freezing compartment is opened, the freezing compartment distribution plate 62 and the refrigerating compartment distribution plate 63 of the cold air distribution housing 60 rotate upwards (solid line in FIG. 3) to adjust the flow rate of the cold air in the freezer compartment 20. When the door of the refrigerating compartment 30 is opened, the freezer compartment distribution plate 62 and the refrigerating compartment distribution plate 63 rotate downwards (dotted line in FIG. 3) to adjust the flow rate of the cold air. By supplying as much as possible to the refrigerating chamber (30) it is possible to quickly adjust the temperature in the refrigerator according to the heat loss.

As described above, the cold air circulation device of the refrigerator according to the present invention includes a cold air distribution housing having a hinge plate coupled to a cross flow fan and the outer periphery of the cross flow fan, thereby reducing the heat loss generated during opening and closing of the refrigerating compartment or the freezer compartment door. By controlling the rotational speed and the angle of the distribution plate, the cold air is supplied to the place where heat loss occurs, thereby eliminating the temperature irregularity of the refrigerator and achieving uniform cooling at all times.

Claims (2)

An evaporator installed in the center of the middle partition that divides the inside of the main body into a freezer compartment and a refrigerating compartment to exchange heat with the air circulating in the refrigerator, and a cross flow provided at the rear of the evaporator to supply cold air supplied from the evaporator to the freezer compartment and the refrigerating compartment. A cold air circulation system of a refrigerator, comprising: a fan and a cold air distribution housing installed at an outer circumference of the cross flow fan to regulate and distribute a flow direction of cold air. According to claim 1, wherein the cold air distribution housing is installed so as to surround the cross flow fan, the body is formed through the cold air inlet for introducing the heat exchanged cold air from the evaporator and the hinge to be adjustable in the upper and lower ends of the rear of the body, respectively Refrigerator air circulation apparatus of the refrigerator comprising a distribution plate for the freezer compartment and a refrigerator compartment for adjusting the flow direction of the cold air to the freezer compartment and the refrigerating compartment.

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