KR0156369B1 - Cooling air circulating device of a refrigerator - Google Patents

Abstract

In the present invention, the position of the circulating fan installed at the upper part of the evaporator is changed to change the flow path of circulated cool air so that the heat exchange in the evaporator is not generated locally, thereby improving the heat exchange efficiency and dispersing the impurities in the casting, The present invention relates to a cold air circulating apparatus for a refrigerator, and more particularly to a cold air circulating apparatus for a refrigerator which is divided into upper and lower portions by a diaphragm; An evaporator provided on a circulation passage behind the freezer compartment; A circulation fan installed at an upper portion of the evaporator and rotated by a motor to circulate cold air in the refrigerator compartment toward the evaporator; And cool air variable means for varying the position of the circulation fan to change the cool air and the position of the exchange of the evaporator.

Description

Cooling circulation device of refrigerator

FIG. 1 is a side cross-sectional view showing a circulation process of cool air in a conventional refrigerator. FIG.

FIG. 2 is a perspective view of the cold air varying means of the present invention; FIG.

FIG. 3 is a partially sectional front view showing a cold circulation process of the present invention,

FIG. 4 is a side cross-sectional view showing a cold circulation process of the present invention,

DESCRIPTION OF THE REFERENCE NUMERALS

1: Freezer 2: Refrigerator

3: diaphragm 4: evaporator

5: circulation passage 10: cool air variable means

11: circulating fan 12: motor

13: Mobile station 14: Rack

15: Pinion 16: Motor

17: Rail

The present invention relates to a cold air circulating apparatus for a refrigerator, and more particularly, to a circulating fan installed in an upper portion of an evaporator to distribute cool air to be heat-exchanged in an evaporator by moving the circulating fan to left and right, ≪ / RTI >

The refrigerator is generally divided into a freezing chamber 1 and a refrigerating chamber 2 by a diaphragm 3 as shown in Figure 1. The evaporator 4 constituting a refrigeration cycle apparatus is arranged at an inner rear side of the freezing chamber 1, Respectively. Further, a compressor 8 is installed on the outer rear side of the lower portion of the refrigerating chamber 2 to compress the refrigerant gas to a high temperature and a high pressure, and then to a state of being able to evaporate through a not shown condenser and an expansion valve.

A recovery passage 3a for connecting the freezer compartment 1 and the evaporator 4 is formed in the diaphragm 3 so that the cold air circulated into the freezing and refrigerating chambers 1 and 2 is circulated toward the evaporator 4 A refrigerant passage (7) is formed behind the circulation passage (5) and cool air is circulated toward the refrigerating chamber (2). On the other hand, a circulation fan 6 is provided directly above the evaporator 4 to forcibly circulate the cool air toward the freezer compartment 1 and the refrigerating compartment 2. [

The cold air circulation process of the conventional refrigerator will be described as follows. The refrigerant gas is compressed to a high temperature and a high pressure by the operation of the compressor 8, and then is changed into a state of being able to evaporate through the condenser and the expansion valve, and then circulated to the evaporator 4. At this time, the air inside the freezing compartment 1 is circulated to the evaporator 4 through the recovery passage 3a by the circulation fan 6 installed in the upper part of the evaporator 4 and the air inside the refrigerating chamber 2 is returned to the recovery passage 3a. To the evaporator (4). In this process, the refrigerant passes through the evaporator 4, is heat-exchanged and cooled, is discharged toward the freezer compartment 1, and a part of the refrigerant is discharged toward the refrigerating compartment 2 along the refrigerant passage 7 to freeze and refrigerate the stored food.

However, since the position of the circulating fan 6 is not changed in a state where it is installed on the upper center side of the evaporator 4, the flow path of the circulating cool air becomes constant. The cool air is sucked toward the circulation passage 5 along the recovery passage 3a and then circulated along the predetermined flow passage when passing through the evaporator 4 so that the heat exchange of the evaporator 4 is locally generated to lower the heat exchange efficiency . Further, when the heat exchange occurs locally, defrosting included in the cold air is locally embedded in a part of the evaporator 4 to form a heat insulating layer, thereby failing to quickly defrost the defrosting by melting the heater 5a do.

SUMMARY OF THE INVENTION The present invention has been developed in view of the foregoing problems, and it is an object of the present invention to provide a refrigerator which is capable of changing the position of a circulation fan installed in an upper part of an evaporator, And the frost circulation device of the refrigerator in which the frost phase is dispersed so that the frost phase can be performed quickly.

To achieve the above object, according to the present invention, there is provided a refrigerator comprising: a freezing and refrigerating chamber divided into upper and lower portions by a diaphragm; An evaporator provided on a circulation passage behind the freezer compartment; A circulation fan installed at an upper portion of the evaporator and rotated by a motor to circulate cold air in the refrigerator compartment toward the evaporator; And cool air variable means for varying the position of the circulation piece to change the position of heat exchange between the cool air and the evaporator.

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

FIG. 2 is a perspective view of the cold-air varying device of the present invention. FIG. 3 is a partially sectional front view showing a cold-air circulation process of the refrigerator of the present invention. An evaporator 4 is provided on the circulation passage 5 and a cool air variable means 10 is provided on the upper portion of the evaporator 4 to vary the coolant circulation flow path. The cool air variable means 10 is operated when a low-temperature, low-pressure liquid state refrigerant gas is passed into the evaporator 4, and the position of the circulation fan 5 is changed and simultaneously rotated to distribute the cool air in the evaporator 4 ).

The cold air variable means 10 includes a pair of rails 17 mounted on the upper portion of the evaporator 4; A moving base 13 movably fitted on the rail 17 and provided with a motor 12 at an upper center thereof for rotating the circulating fan 11; A rack 14 formed on a bottom surface of the moving base 13; And a pinion 15 rotated in normal and reverse directions by driving of the motor 16 in a state of being engaged with the rack 14 is provided. The unexplained reference numeral 5b denotes a closure plate formed at the upper end of the upper end of the circulation passage 5 to prevent the circulation fan 11 from being exposed to the freezing chamber 1 and 5a is formed in the closure plate 5b, To the discharge port.

The refrigerant gas compressed in the compressor 8 is circulated through the condenser and the expansion valve, which are not shown in the figure, to a low-temperature, low-pressure evaporative liquid state and then to the evaporator 4. When the circulation fan 11 is rotated by the operation of the motor 12, the air on the circulation passage 5 is exchanged with the refrigerant through the evaporator 4 and is then discharged into the freezer compartment 1 along the discharge port 5a And the food is frozen. In addition, some of the cold air is discharged into the refrigerating chamber (2) along the rear refrigerating passage (7), and the stored food is refrigerated.

Meanwhile, while the circulating fan 11 is circulating, the circulating fan 11 is moved from the neutral state at the center of the upper part of the evaporator 4 to the left side for a predetermined distance and is maintained in the stopped state for a predetermined time, The process of being neutralized is repeated. That is, in the initial state, the circulating fan 11 maintains neutral state. At this time, when the refrigerant gas is circulated into the evaporator 4 by the operation of the compressor 8, the refrigerant gas is maintained in the neutral state for a predetermined time, The circulation fan 11 is rotated to draw cool air toward the center of the evaporator 4. The refrigerant is circulated through the discharge port 5a and the refrigerant passage 7 after being heat-exchanged in the process of being sucked, and the cold air is circulated inside the refrigerating chambers 1 and 2.

On the other hand, in the neutral state, the heat exchange is performed for a predetermined time and then moved to the left side.

At this time, the rack 14 and the moving base 13 are moved to the left side by the pinion 15 rotating counterclockwise in accordance with the driving of the motor 19, and the position of the circulating fan 11 is moved to the left . Also, as the circulating fan 11 is moved for a predetermined time, the cool air is mostly sucked into the left portion of the evaporator 4 and heat-exchanged. The heat transfer from the left side of the evaporator 4 proceeds and then the movable table 13 is moved to the right by the pinion 15 rotating clockwise in accordance with the driving of the motor 16, . At this time, most of the cool air is circulated to the right side of the evaporator 4 and heat-exchanged when the circulated refrigerant 11 is rotated.

The heat exchange is continued for a predetermined time in the right portion and then the pinion 15 is rotated counterclockwise in accordance with the driving of the motor 16 so that the circulation fan 11 is positioned at the neutral position of the center of the evaporator 4. When the next circulating fan 11 located at the neutral position is rotated, most of the cold air is circulated toward the center of the evaporator 4 and heat-exchanged. As a result, the circulation fan 11 is repeatedly moved in the order of neutral → left → right → neutral, and heat exchange proceeds, so that the evaporator 4 is not locally heat-exchanged.

As described above, according to the present invention, as the position of the circulating fan installed on the upper portion of the evaporator is changed to the left and right, the circulating cold air uniformly passes over the entire surface of the evaporator, and heat exchange is not locally generated. In addition, since the cold air is passed through the evaporator in a uniformly dispersed state, the moisture contained in the cold air spreads to the surface of the evaporator, thereby reducing the defrosting time and shortening the defrosting time And so on.

Claims (2)

A freezing / refrigerating chamber (1) (2) divided into upper and lower portions by a diaphragm (3); An evaporator (4) installed on a circulation passage (5) behind the freezing chamber (1); A circulation fan 11 installed on the evaporator 4 and rotated by a motor 12 to circulate cool air to the evaporator 4 in the refrigerator 1 and the refrigerator 1; And a cool air variable means (10) for varying the position of the circulating fan (11) and changing the position of heat exchange between the cool air and the evaporator (4). The refrigerator according to claim 1, wherein the cool air variable means (10) comprises: a pair of rails (17) mounted on a circulation passage (5) above the evaporator (4); A moving table 13 movably fitted in each of the rails 17 and having a rack 14 formed on the bottom surface thereof and the circulation fan 11 and the motor 12 installed at the center of the top; And a pinion (15) rotated in normal and reverse directions by a motor (12) while being engaged with the rack (14).