KR20000019915A - Refrigerator - Google Patents

Abstract

PURPOSE: A refrigerator is provided to uniformly distribute cool air in a whole refrigerating chamber without temperature deviation and improve heat efficiency by introducing completely heat exchanged air into an evaporator via an air suction hole. CONSTITUTION: A refrigerator includes a cabinet defined into a freezing chamber and a refrigerating chamber(120), and a cool air supplying device incorporated with an evaporator(310) and a fan(320) provided on a rear wall of the refrigerating chamber for providing cool air to the refrigerating chamber, wherein the cool air supplying device includes a suction duct(340) having a lower end part(341) communicating with a lower part of the evaporator, an upper part(342) folded and extended upward along a side end part of the evaporator, and a suction hole(343) for guiding air of the refrigerating chamber to a lower part of the evaporator, and a discharge duct(330) having an upper part(331) communicating with an upper part of the evaporator, a lower part(332) formed symmetrically along a side end part of the evaporator, and a multi-stepped cool air discharge hole(333) for discharging cool air to the refrigerating chamber uniformly.

Description

Refrigerator

The present invention relates to a refrigerator, and more particularly, to a refrigerator compartment cold air supply device that sucks the refrigerator compartment air into a cold compartment and supplies the same to the refrigerator compartment again.

The refrigerator is generally configured to supply the cold air generated from the evaporator of the refrigeration cycle to the freezer compartment and the refrigerating compartment to maintain the freshness of various foods for a long time, as shown in FIG. 1, in the cabinet 1 forming the outer body. A freezer compartment (2) for storing frozen foods and a refrigerating compartment (3) for storing refrigerated foods are partitioned by an intermediate partition (9). The freezer compartment (2) and the refrigerating compartment (3) are opened and closed. The doors 4 and 5 are hingedly coupled to the front surface of the cabinet 1.

In the rear of the freezing chamber 2, a separate cooling chamber 6 for generating cold air is formed. It includes a circulation fan 6b for introducing air from the evaporator 6a, the freezing chamber 2 and the refrigerating chamber 3 into the evaporator 6a and forcibly blowing the generated cold air. And freezing chamber duct 7 and refrigerating chamber duct 8 in which cold air outlet holes 7a and 8a are arranged to guide the cold air to the freezing chamber 2 and the refrigerating chamber 3 are set up on the rear side, Inside the partition 9, return ducts 9a and 9b are formed, which guide the air from the freezing chamber 2 and the refrigerating chamber 3, which are sucked by the circulation fan 6b, to the evaporator 6a.

In the freezing chamber 2 and the refrigerating chamber 3, shelves 2a and 3a are provided in the horizontal direction so as to accommodate and store food, respectively. Since the internal space is larger than the freezer compartment 1 in the refrigerating compartment 3, the shelf 3a is provided in multiple stages, and a separate vegetable box 3b for storing vegetables and the like containing moisture therein is provided.

When the circulating fan 6b is operated in the refrigerator configured as described above, air in the freezing compartment 2 and the refrigerating compartment 3 flows into the lower part of the evaporator 6a through the return ducts 9a and 9b. As it passes through, it is cold, and then it is forcedly blown into the freezing chamber 2 and the refrigerating chamber 3 through the freezing chamber duct 7 and the refrigerating chamber duct 8. Accordingly, the foods stored in the freezer compartment 2 and the refrigerating compartment 3 are stored in the frozen and refrigerated state, respectively.

However, in the conventional refrigerator, since the cold air is forcedly blown by one evaporator 6a and the circulation fan 6b provided at the rear of the freezer compartment 2, the cold air is not evenly supplied to the refrigerating compartment 3 having a relatively large internal volume. That is, the refrigerating chamber (3) is supplied with cold air through the refrigerating chamber duct (8) installed on the rear wall, there is a disadvantage that the forced blowing force of the circulation fan 6 is not uniformly supplied to the entire refrigerating chamber (3).

In order to solve this problem, recently, an independent cooling refrigerator has been proposed to maintain an optimal state for each food storage type by installing separate evaporators in a freezer compartment and a refrigerator compartment, and FIG. 2 schematically illustrates such a refrigerator structure. It is shown in cross section.

In the independent cooling refrigerators, cold air supply devices 30 and 40 are separately formed at the rear of the freezing compartment 10 and the rear of the refrigerating compartment 20, respectively. The freezer compartment 10 is provided with an evaporator 31 and a blower fan 32 in the cold air supply device 30 to suck the air from the freezer compartment 10 into the evaporator 31 and pass the cold air to the freezer compartment 10. Forced air again. The cold air supply device 40 of the refrigerating chamber 20 is formed above the rear wall. Here, the evaporator 41 and the blowing fan 42 for blowing the cold air to the front side are also provided above the evaporator 41. In the front portion of the evaporator 41, the inlet port 43 into which the refrigerating chamber 20 air is sucked and the discharge port 44 through which cold air is discharged are formed, and the cold air discharge port 46 is configured to properly distribute and guide the cold air to the entire refrigerating chamber 20. The cold air distribution duct 45, which is arranged up and down, is installed in the center of the rear wall. Inside the cold air distribution duct 45 is a rotary blade 47 is rotated by a separate motor.

Therefore, when the blowing fan 32 and the rotary blade 47 of the refrigerating compartment 20 is rotated, the refrigerating compartment 20 air is introduced into the lower part of the evaporator 41 through the suction port 43, and the cold air generated while passing through the inlet port 43. Is evenly supplied to the refrigerating chamber 20 through the discharge port 44 and the cold air distribution duct 45 by the forced blowing force of the blower fan (32). That is, some of the cold air is discharged to the upper side of the refrigerating chamber 20 through the discharge port 44, and the cold air is uniformly discharged to the entire refrigerating chamber 20 through the cold air discharge port 46. In particular, by driving the rotary blade 47 built in the cold air distribution duct 45, evenly distributed cold air in every corner of the refrigerating chamber 20, rotates so as not to escape the cold air even if the door 21 is opened to intercept cold air The refrigerating chamber 20 temperature is kept constant.

However, these independent cooling refrigerators have the following problems.

First, the cold air supply device 40 of the refrigerating chamber 20 is formed with the discharge port 44 and the suction port 43 adjacent to the front side of the evaporator 41, so that the discharge port immediately flows in the state where the discharged cold air is not heat-exchanged. There is a problem that the case is re-suction to 43 to reduce the heat exchange efficiency of the refrigeration cycle.

In addition, by installing a separate cold air distribution duct 45 having a rotary blade 47 embedded in the rear wall surface of the refrigerating chamber 20 for the constant temperature cooling of the refrigerating chamber 20, the manufacturing cost is increased, as well as the rotary blade 47. Power consumption due to driving also rises.

The present invention is to solve this problem, the main object of the present invention is to install a discharge duct formed in multiple stages of the cold air outlet symmetrically around the evaporator provided in the center of the rear wall of the refrigerating chamber, the air inlet is formed at the top of the refrigerating chamber air The suction duct guided to the lower part of the evaporator is also symmetrically formed at both ends of the evaporator, so that the distribution of cold air is uniform throughout the refrigerating chamber so that temperature deviation does not occur according to the position, and the air exchanged completely in the refrigerating chamber is transferred to the evaporator through the air inlet. It is to provide a refrigerator which is introduced to improve the heat exchange efficiency of the refrigeration cycle.

The secondary object of the present invention is to gradually discharge the discharge duct from the upper end in communication with the upper part of the evaporator to the lower part side, thereby guiding the cold air at a high speed to the lower end, so that the cold air is uniformly discharged through the cold air outlet located at the lower end, On the contrary, the suction duct is gradually wider from the lower end to the upper end side where the air suction unit is formed, thereby reducing the suction load, thereby providing a refrigerator in which refrigerating chamber air is sucked smoothly.

1 is a side cross-sectional view schematically showing a conventional refrigerator.

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

Figure 3 is a side cross-sectional view schematically showing the overall structure of the refrigerator according to the present invention.

Figure 4 is a front view schematically showing a refrigerator compartment cold air supply apparatus of the refrigerator according to the present invention.

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

120. Refrigerator 300. Cooler 310. Evaporator

320 .. Fan 330. Discharge duct 333. Cold air outlet

340..Suction duct 343.Air intake

In the present invention for achieving the above object, in the refrigerator having a freezer compartment and a refrigerating compartment therein, a refrigerator provided with a cold air supply device having a built-in evaporator and a fan to provide cold air to the refrigerating compartment provided on the rear wall surface of the refrigerating compartment,

The cold air supply device has a lower end communicating with the lower part of the evaporator, an upper end being extended upward along the evaporator side end, and a suction duct formed to guide the refrigerating chamber air to the lower part of the evaporator, the upper part communicating with the upper part of the evaporator, and the lower part communicating with the upper part of the evaporator. It is configured to be symmetrically along the end, the width is gradually widened from the upper end to the lower end side in which cold air is introduced, characterized in that it comprises a discharge duct having a multi-stage cold air discharge outlet for uniformly discharging the cold air forced by the fan into the refrigerating chamber do.

Hereinafter, one preferred embodiment according to the present invention will be described in detail with reference to the accompanying drawings. Figure 3 is a side cross-sectional view showing the overall structure of the independent cooling refrigerator according to the present invention, Figure 4 is a front view schematically showing the structure of the refrigerator compartment of the refrigerator according to the present invention.

As shown in the independent cooling refrigerator according to the present invention, a freezer compartment 110 for freezing and storing food and a refrigerating compartment 120 for refrigeration storage are formed in the cabinet 100 forming the outer shape. The intermediate partition 150 is partitioned up and down. The freezer compartment 110 and the refrigerating compartment 120 are provided with multi-stage shelves 160 in a horizontal direction to accommodate food, and the vegetable box 170 is provided in the lower side of the refrigerating compartment 120 in a drawer type. Doors 130 and 140 are hinged to the front surface of the cabinet 100 to open and close the freezer compartment 110 and the refrigerating compartment 120.

And in the rear of the freezing chamber 110 and the refrigerating chamber 120, the cold air supply device (200,300) for generating and supplying the cold air is configured separately, the detailed structure thereof is as follows.

First, the cold air supply device 200 for the freezer compartment is installed on the rear wall surface of the freezer compartment 110, as shown in FIG. 3, which includes an evaporator 210 and a circulation fan 220 provided at an upper center of the evaporator 210. And a motor 230, the evaporator cover 240 covering them. The evaporator cover 240 has a cold air discharge port 241 is formed in the upper portion for guiding the cold air discharged to the freezing chamber 110, the air inlet 242 for guiding the air of the freezing chamber 110 to enter the lower portion of the evaporator (210). ) Is formed at the lower side.

The cold air supply device 300 for the refrigerating chamber is configured to discharge the cold air uniformly over the refrigerating chamber 120 exclusively as a characteristic element of the present invention, as shown in FIGS. 3 and 4. A rectangular evaporator 310 is installed on the rear wall center and is covered by a heat insulating material 351 and an evaporator cover 350. Discharge ducts 330 for guiding discharged cold air to the refrigerating chamber 120 and suction ducts 340 for suctioning the refrigerating chamber 120 air to the evaporator 310 are provided symmetrically on both sides of the evaporator 310. This is achieved by the inner wall of the refrigerating chamber 120 and the evaporator cover 350. In addition, the upper central portion of the evaporator 310 sucks air in the refrigerating chamber 120 through the suction duct 340 to the lower part of the evaporator 310, and cool air generated while passing through the evaporator 310 through the discharge duct 340. A fan 320 and a motor 321 forcing forced air back to 120 are provided.

The structure of the suction duct 340 and the discharge duct 330 for guiding the cold air circulation in detail will be described below.

First, the suction duct 340 has a lower end 342 communicating with the lower part of the evaporator 310, and the upper end part 341 of the suction duct symmetrically extends up to the upper side of the rear wall of the refrigerating chamber 120 along both sides of the evaporator 310, and has an uppermost end. The suction port 343 is formed to suck the air in the refrigerating chamber 120. In addition, the width of the suction duct 340 gradually increases from the lower end 342 of the suction duct 340 toward the upper end 341, thereby reducing the suction load and smoothly sucking the air. That is, the air that has completed the heat exchange operation in the refrigerating compartment 120 and rises to the upper side of the refrigerating compartment 120 is introduced into the lower part of the evaporator 310 through the air suction port 343 and the suction duct 340 by driving the fan 320. Since the cross-sectional area of the upper end portion 342 of the suction duct 340 through which air is first sucked is large, the air suction load is reduced.

In addition, the discharge duct 330 has an upper end portion 331 communicating with an installation space of the fan 320 and the motor 321, that is, the upper portion of the evaporator 310, and the lower end portion 332 of the discharge duct 330 along both ends of the evaporator 310. It is bent and extended in the downward direction, the cold air outlet 333 of the multi-stage is provided to be spaced apart at regular intervals so that cold air is evenly discharged throughout the refrigerating chamber 120. In addition, the width of the discharge duct 330 is gradually widened from the upper end 331 to the lower end 332 so that cold air is smoothly guided to the lower end 332 by the forced blowing force of the fan 320. That is, the cold air generated by the evaporator 310 descends toward the lower end portion 332 of the discharge duct 330 by the forced blowing force of the fan 320 toward the lower end portion 332 side of the cold storage chamber 120 through the cold air discharge port 333. To be discharged. At this time, since the cross-sectional area of the upper end portion 331 of the discharge duct 330 is small, the flow velocity is increased by passing through the upper end portion 331, so that the cool air is guided to the lower end portion 332 at a considerable speed and the cold air discharge port 333 is provided. It is evenly discharged through. On the other hand, the cold air discharge port 333 formed in the discharge duct 330 is preferably formed to be wider from the upper end portion 331 toward the lower end portion 332, this is to more evenly the cold air discharge.

Next, the operation of the refrigerator according to the present invention configured as described above and the effects thereof will be described.

First, when the circulation fan 220 of the freezer compartment cold air supply device 200 rotates, the air of the freezer compartment 110 flows into the evaporator 210 through the air inlet 242 and passes through the evaporator 210. Turns into cold Subsequently, the cold air is discharged to the freezing chamber 110 by the forced blowing force of the circulation fan 220 to freeze and store the stored food, and the air which has completed the heat exchange operation is introduced into the evaporator 210 through the air inlet 242 again. .

When the fan 320 of the refrigerating compartment cold air supply device 300 is rotated by the motor 321, the air located above the refrigerating compartment 120 is sucked into the suction duct 340 through the air inlet 343. And, it flows along and flows into the lower part of the evaporator 310. And the introduced air is changed to cold by passing through the evaporator 310 by the suction blowing force of the fan 320, which is forcibly blown toward the upper end portion 331 of the discharge duct 330. The cold air flows along the discharge duct 330 and is discharged to the refrigerating chamber 120 through the cold air discharge port 333.

In this case, as described above, the discharge duct 330 gradually increases in width from the upper end portion 331 to the lower end portion 332, so that the cool air blown by the fan 320 has a width by a kind of orifice principle. Flowing through the narrow discharge duct 330, the upper end 331, the flow rate is fast guided uniformly to the discharge duct 330, the lower end 332, through the cold air outlet 333 of the multi-stage spaced up and down spaced at regular intervals in the refrigerating chamber 120 ) Is supplied to the compartment and the interior and shelf 160 to cool the food evenly. The air that has completed the heat exchange in the refrigerating compartment 120 rises to the upper space of the refrigerating compartment 120 by a natural convection phenomenon, and the air flows back into the evaporator 310 through the suction port 343 and the suction duct 340 and cool air. Is converted into a continuous cycle. The refrigerating chamber 120 air is sucked into the suction duct 340 by the suction force of the fan 320, the upper end portion 341 of the suction duct 340 having the suction port 343 is relatively wider than the lower end 342. Since it is formed, the refrigerating chamber 120 air is smoothly sucked to reduce the load received by the fan 320 and the motor 321. That is, the cross-sectional area of the upper end portion 341 of the suction duct 340 in which the air in the refrigerating chamber 120 is sucked is formed to be larger than the lower end 342 so that the air suction load is reduced, so that the air in the refrigerating chamber 120 is lowered to the evaporator 310. The heat exchange efficiency of the inflow is smoothly improved, as well as the operation load is reduced by reducing the load received by the fan 320 and the motor 321.

As a result, the cold air supply device 300 for a refrigerating compartment according to the present invention distributes and distributes cold air evenly to the entire refrigerating chamber 120 through the multi-stage cold air discharging opening 333, without causing a temperature deviation according to the refrigerating chamber 120 position. The food stored therein is cooled uniformly. In addition, the heat exchange efficiency of the refrigerating cycle is improved since the air after the heat exchange operation is completely introduced back into the evaporator 310 through the suction port 343 and the suction duct 340 positioned above the refrigerating chamber 120.

As described in detail above, the refrigerator according to the present invention is provided with a discharge duct formed in multiple stages of the cold air discharge port symmetrically around the evaporator provided in the center of the rear wall of the refrigerating chamber, and an air inlet is formed at the upper end to guide the refrigerating chamber air to the lower part of the evaporator. The suction duct is also formed symmetrically on both ends of the evaporator. Therefore, since the distribution of cold air is uniformly made throughout the refrigerating compartment, temperature deviation does not occur according to the position, and the heat exchange efficiency of the refrigerating cycle is improved because air completely exchanged in the refrigerating compartment is introduced into the evaporator through the air inlet. In this case, since the discharge duct is gradually wider from the upper end communicating with the upper part of the evaporator toward the lower end side, the cold air blown by the fan has the advantage of being uniformly discharged through the cold air outlet located at the lower end. There is an advantage that the air intake is smoothly configured to be gradually wider toward the upper end side formed air intake portion at the lower end thereof.

Claims (2)

The cabinet 100 having the freezing compartment 110 and the refrigerating compartment 120 partitioned therein is provided on the rear wall of the refrigerating compartment 120, and the evaporator 310 and the fan 320 are provided to supply cold air to the refrigerating compartment 120. In the refrigerator with a cold air supply unit 300, The cold air supply device 300 has a lower end 341 is in communication with the lower part of the evaporator 310 and the upper end 342 is extended upward along the side end of the evaporator 310 to supply air to the refrigerating chamber 120. Suction duct 340, the suction port 343 is formed to guide the lower portion 310, The upper end 331 is in communication with the upper part of the evaporator 310 and the lower end 332 is configured to be symmetrically along the side end of the evaporator 310, but the width gradually increases toward the lower end 332 side from the upper end 331 into which cold air is introduced. And a discharge duct 330 having a plurality of stages of cold air discharge ports 333 configured to uniformly discharge cold air forced by the fan 320 to the refrigerating chamber 120. The suction duct 340 of claim 1, wherein the suction duct 340 has a suction port 343 formed at a lower end portion 342 such that the air suction load of the refrigerating chamber 120 is reduced to facilitate the suction of air by the fan 320. Refrigerator, characterized in that the width gradually formed toward the upper end (341) side.