JP6714970B2 - refrigerator - Google Patents

Description

The present invention relates to a refrigerator having a cold air passage.

A conventional refrigerator is disclosed in Patent Document 1. In this refrigerator, a refrigerating room (first refrigerating room) for refrigerating and storing the stored material is arranged above the heat insulating box, and a vegetable compartment (second refrigerating room) for refrigerating and storing the stored material is disposed below the refrigerating room. It Below the vegetable compartment, the freezer compartments for freezing and storing the stored foods are vertically arranged side by side.

A machine room is provided on the back side of the lowermost freezing room, and a compressor for operating a refrigeration cycle is arranged in the machine room.

At the rear of the freezer compartment, the vegetable compartment, and the refrigerating compartment, a cool air passage is provided in which a cooler, a blower fan, and a damper are arranged so that cool air flows. A discharge port and a return port facing the freezing room, a discharge port facing the refrigerating room, and a return port facing the vegetable compartment are opened in the cold air passage. In addition, a communication passage for leading cold air to the vegetable compartment is led to the refrigerating compartment.

In the refrigerator configured as described above, the cool air generated by heat exchange between the air flowing through the cool air passage and the cooler by driving the compressor and the blower fan is discharged from the discharge port to the freezer compartment. The cool air discharged from the discharge port flows through the freezing chamber and returns to the cooler via the return port.

When the damper is opened, cool air is discharged from the discharge port of the refrigerating compartment and flows into the vegetable compartment through the communication passage. The cold air flowing through the vegetable compartment returns to the cooler via the return port. Thereby, the freezer compartment, the refrigerator compartment, and the vegetable compartment are cooled.

JP, 9-113108, A

However, according to the conventional refrigerator, the cold air generated by the cooler flows into the refrigerating compartment through the cold air passage arranged on the back surface of the vegetable compartment. Therefore, when the cool air flows behind the vegetable compartment, the temperature of the cool air may increase. Therefore, there is a problem that the cooling capacity of the refrigerator is reduced.

An object of the present invention is to provide a refrigerator that can improve the cooling capacity.

In order to achieve the above object, a refrigerator according to the present invention includes a first refrigerating chamber maintained at a refrigerating temperature, a freezing chamber disposed below the first refrigerating chamber and maintained at a freezing temperature, and a first refrigerating chamber. A second refrigerating chamber that is arranged in one of the left and right directions between the first refrigerating chamber and the freezing chamber and is maintained at a refrigerating temperature, and a first refrigerating chamber and the freezing chamber that are adjacent to a side of the second refrigerating chamber. Cold air having a cooler formed in a plurality of stages by meandering a refrigerant pipe having a freezing compartment part that is arranged between A refrigerator that discharges cold air to the first refrigerating chamber, the second refrigerating chamber, the freezing compartment and the freezing chamber via the cold air passage, wherein the cold air passage installs the cooler A cooler chamber provided below the freezing compartment from below the compartment to below the second refrigerating compartment, and avoiding the rear of the second refrigerating compartment and passing from the cooler compartment to the rear of the freezing compartment. An upper passage extending upward, the fin forming portion at the uppermost stage of the cooler is formed to have a width in the left-right direction smaller than that of the fin forming portion at the lowermost stage, and the bias passages are biased toward the upper passage side. It is characterized by

Further, the present invention is characterized in that, in the refrigerator having the above-mentioned configuration, the uppermost refrigerant pipe of the cooler is formed to have a width in the left-right direction smaller than that of the lowermost refrigerant pipe.

Further, the present invention is characterized in that, in the refrigerator having the above-mentioned structure, a return port for returning cold air to the cooler chamber is provided in a lower portion of the cooler chamber opposite to the upper passage.

Further, the present invention is characterized in that, in the refrigerator having the above structure, an accumulator for accumulating the refrigerant flowing out of the cooler is provided, and the accumulator is arranged laterally on the opposite side of the upper passage with respect to the cooler. And

Further, the present invention is, in the refrigerator having the above-mentioned configuration, a defrosting heater for defrosting arranged below the cooler, a first thermistor for detecting a temperature above the cooler, and a temperature of the accumulator. And a second thermistor for performing the defrosting operation, and stopping the defrosting operation when the first thermistor and the second thermistor reach a predetermined temperature.

Further, the invention is characterized in that a shield plate for shielding the cooler and the accumulator is provided.

Further, the present invention is characterized in that, in the refrigerator having the above structure, one side wall of the upper passage and an upper wall of the cooler chamber are connected by an inclined surface.

According to the present invention, the cooler chamber in which the cooler is arranged is provided behind the freezing chamber from below the freezing compartment to below the second refrigerating chamber, and the upper passage extending upward from the cooler chamber is the second refrigerating chamber. Avoid the rear of the room and pass behind the frozen compartment. Therefore, the temperature rise of the cool air flowing through the upper passage is suppressed, and the cooling capacity of the refrigerator can be improved.

Further, the uppermost fin forming portion of the cooler formed in a plurality of stages is formed to have a width in the left-right direction smaller than that of the lowermost fin forming portion, and is arranged biased to the upper passage side. With this, the cold air flowing upward from the lower side in the cooler chamber is guided to the upper passage that is biased to one side in the left-right direction, so that the decrease in the heat exchange amount can be suppressed even if the width of the fin forming portion at the uppermost stage is narrowed. Therefore, the number of fins can be reduced and the cost of the refrigerator can be reduced.

The front view which shows the refrigerator of 1st Embodiment of this invention. Front view of the main body of the refrigerator according to the first embodiment of the present invention AA sectional view of FIG. BB sectional view of FIG. The perspective view which shows the lower part of the freezing cold air passage and the cooler room of the refrigerator of 1st Embodiment of this invention. The front view which shows the refrigerator of the refrigerator of 1st Embodiment of this invention. The perspective view which shows the vegetable compartment of the refrigerator of 1st Embodiment of this invention. Front view of the main body of the refrigerator according to the second embodiment of the present invention Front view of the main body of the refrigerator according to the third embodiment of the present invention CC sectional view of FIG.

<First Embodiment>
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a front view of the refrigerator 1 of the first embodiment. In the refrigerator 1, doors are arranged in front of a plurality of storage chambers provided in the main body 2 (see FIG. 2). A refrigerating compartment (first refrigerating compartment) 4 for refrigerating stored items is arranged above the refrigerator 1, and a front surface of the refrigerating compartment 4 is opened and closed by a double door 4L and a door 4R. A freezer compartment 6 for freezing and storing stored items is arranged under the refrigerator 1, and a front surface of the freezer compartment 6 is opened and closed by a drawer-type door 6a integral with a storage case 6d (see FIG. 2).

A vegetable compartment (second refrigerating compartment) 5 is arranged between the refrigerating compartment 4 and the freezing compartment 6 in the rightward direction. The vegetable compartment 5 is maintained at a refrigerating temperature to refrigerate stored items such as vegetables, and is opened/closed by a pull-out door 5a integrated with a storage case 50 (see FIG. 2).

Further, between the refrigerating compartment 4 and the freezing compartment 6 is provided a freezing compartment 21 (see FIG. 2) adjacent to the left of the vegetable compartment 5 and maintained at a freezing temperature. The freezing compartment 21 has an ice making chamber 25 arranged in the upper part and a freezing chamber 26 arranged in the lower part. The front surface of the ice making chamber 25 is opened and closed by a drawer type door 25a integrated with the ice storage case 25b (see FIG. 2). The front surface of the freezer compartment 26 is opened and closed by a drawer type door 26a that is integral with the storage case 26b (see FIG. 2).

The door 5a has the same width as the door 4R of the refrigerating compartment 4, and the doors 25a and 26a have the same width as the door 4L of the refrigerating compartment 4. Thereby, the appearance of the refrigerator 1 can be improved.

FIG. 2 shows a front view of the main body 2. 3 shows a sectional view taken along the line AA of FIG. 2, and FIG. 4 shows a sectional view taken along the line BB of FIG. The main body portion 2 forms each storage chamber by the heat insulating box body 3 in which the heat insulating material 13 is filled between the inner box and the outer box. The refrigerating compartment 4 and the vegetable compartment 5 and the refrigerating compartment 4 and the ice making compartment 25 are partitioned by a partition section 18 arranged horizontally. The vegetable compartment 5 and the freezer compartment 6 are separated from each other by a horizontally arranged partition section 19. The vegetable compartment 5 and the frozen compartment 21 are partitioned by a partition 20 arranged vertically. In addition, when the partition portion is filled with the heat insulating material 13, when the temperature difference between the storage chambers is large, it is possible to prevent harmful effects of the stored material due to overcooling of the stored material stored near the partition portion. For this reason, when the temperature difference between the storage chambers is large, it is preferable to fill the partition portion that partitions the storage chambers with the heat insulating material 13.

The front end portion between the freezing compartment 26 and the freezing compartment 6 is provided with a partition portion 36 horizontally arranged at the same height as the partition portion 19. At the front end between the ice making chamber 25 and the freezing chamber 26, a horizontally arranged partition 35 is provided. The ice making room 25, the freezing room 26 and the freezing room 6 communicate with each other behind the partition parts 35 and 36.

A plurality of shelves 4b, 4c, 4d, and 4e are provided in the refrigerator compartment 4. Below the lower end shelf 4e, a chilled chamber 70 is formed which is biased to the right and is composed of an isolation chamber. A storage case 70a is provided in the chilled chamber 70. To the left of the chilled chamber 70 is adjoined a small article chamber 73 in which a storage case 71 is arranged, and to the left of the small article chamber 73 is arranged a water storage tank 72 for storing water for ice making.

A storage case 51 is placed on the storage case 50 of the vegetable compartment 5. The storage case 6c is placed on the storage case 6d of the freezer compartment 6, and the storage case 6b is placed on the storage case 6c.

A machine room 30 is provided below the freezing room 6 below the main body 2. A compressor 31 that operates a refrigeration cycle is arranged in the machine room 30.

A cool air passage 7 through which cool air flows is provided at the rear of the main body 2. The cold air passage 7 has a cooler chamber 12, an upper passage 9, a lower passage 29, and a return passage 34. The cooler chamber 12 is arranged behind the freezer compartment 6 from below the freezer compartment 26 to below the vegetable compartment 5, and the cooler 11 is installed therein. The cooler 11 is located above the machine room 30, and at the lower end of the cooler room 12 is provided a return port 9c for returning cold air from the freezing room 6. The return port 9c extends in the left-right direction, and the right end portion is provided on the opposite side of the upper passage 9.

The upper passage 9 extends upward from the cooler chamber 12, and the lower passage 29 is arranged in front of the cooler chamber 12 via the partition plate 27. The return passage 34 is led out downward from the vegetable compartment 5 along the side wall of the freezer compartment 6 on the side opposite to the upper passage 9, and is connected via a return port 12c provided at the lower end of the side wall 12d of the cooler compartment 12. .. At this time, the return port 12c is arranged below the cooler 11. Further, the partition portion 18 that forms the bottom wall of the refrigerating compartment 4 is provided with a communication port 4f that allows the refrigerating compartment 4 and the vegetable compartment 5 to communicate with each other.

A blower fan 10, a damper 23, and a blower fan 24 are arranged in the upper passage 9 from below. The blower fan 10 is arranged at a position overlapping the partition 36 in front projection. The lower passage 29 is branched from the upper passage 9 on the exhaust side of the blower fan 10 and extends downward. The damper 23 is opened when the refrigerating compartment 4 and the vegetable compartment 5 are cooled, and guides cool air to the refrigerating passage 8 formed above the damper 23 in the upper passage 9. The blower fan 24 is driven when the damper 23 is opened. The front surfaces of the upper passage 9 and the lower passage 29 below the damper 23 are covered with the panel 7a. The front surface of the refrigerating passage 8 above the damper 23 of the upper passage 9 is covered with the panel 7b.

The refrigerating passage 8 is arranged along the back surface and the ceiling surface of the refrigerating compartment 4, and a plurality of discharge ports 8a to 8f facing the refrigerating compartment 4 are opened. The discharge port 8a is provided on the ceiling surface of the refrigerating compartment 4 in the front part of the refrigerating passage 8. The discharge ports 8b to 8d are provided between the shelves 4b to 4e. The lower outlets 8e and 8f face the inside of the chilled chamber 70.

A portion of the upper passage 9 below the damper 23 passes behind the ice making chamber 25 and the freezing chamber 26 while avoiding the vegetable chamber 5, and a discharge port 9a facing the ice making chamber 25 and a discharge port 9b facing the freezing chamber 26 are opened. Discharge ports 29a to 29d facing the freezer compartment 6 are opened in the lower passage 29. The discharge ports 29a to 29c are arranged vertically below the freezer compartment 26 in the vertical direction. The discharge port 29d is arranged vertically below the vegetable compartment 5.

FIG. 5 shows a perspective view of the lower part of the upper passage 9 of the cool air passage 7 and the cooler chamber 12. FIG. 6 shows a front view of the cooler 11. A defrost heater 46, a cooler 11, and a thermistor (first thermistor) 45a are arranged from below in the cooler chamber 12, and an accumulator 42, a shielding plate 44, and a thermistor (second thermistor) are provided on the right side of the cooler 11. 45b is arranged.

The defrost heater 46 has a right end extending below the accumulator 42, and a left end extending below the left end of the cooler 11. The defrost heater 46 is formed of a glass tube heater and defrosts the cooler 11 and the accumulator 42. The cooler 11 is arranged in the low temperature portion of the refrigeration cycle and has a refrigerant pipe 41 through which a refrigerant flows. The refrigerant pipe 41 is formed in a plurality of stages (7 stages in the present embodiment) meandering in the vertical direction and the front-rear direction, and the lower portion is formed to extend to the right in the figure from the upper portion. Therefore, the horizontal width L1 of the uppermost refrigerant pipe 41 of the cooler 11 is formed smaller than the horizontal width L2 of the lowermost refrigerant pipe 41.

A fin forming portion 40 in which thin plate-shaped fins 40a are arranged side by side is provided in the horizontal portion of each stage of the refrigerant pipe 41. The width L3 in the left-right direction of the uppermost fin forming portion 40 of the cooler 11 is formed to be smaller than the width L4 in the left-right direction of the lowermost stage, and the uppermost fin forming portion 40 is biased toward the upper passage 9 side. .. In the present embodiment, the width L3 of the fin forming portion 40 in the left-right direction is formed to be 1/2 or less of the width L4. Further, the pitch width of the fins 40a of the fin forming portion 40 in the lowermost stage is formed larger than the pitch widths of the other stages.

The thermistor 45a detects the temperature of the upper part of the cooler 11. The accumulator 42 is provided in the lower portion on the opposite side of the upper passage 9 and is connected to the lowermost refrigerant pipe 41. The accumulator 42 accumulates the refrigerant in the refrigerant pipe 41 and prevents the refrigerant that has not been gasified in the cooler 11 from being sucked into the compressor 31 in a liquid state.

The left end portion of the cooler 11 is provided with a plate-shaped end plate 43 extending over a plurality of stages, and the right end portion thereof is provided with a plate-like shield plate 44 extending over a plurality of stages.

The shield plate 44 is bent to cover the left side and the upper side of the accumulator 42 and shield the cooler 11. As a result, a shielding chamber 44a partitioned by the shielding plate 44 inside the cooler chamber 12 is formed. The thermistor 45b (second thermistor) is provided on the left side above the accumulator 42 outside the shielded chamber 44a, and detects the temperature of the accumulator 42. Since the thermistor 45b does not directly detect the temperature of the defrosting heater 46 but may be disposed at a position that detects the temperature of the accumulator 42, the thermistor 45b is disposed inside the shielded chamber 44a (for example, above the accumulator 42). May be

The right side wall 9d of the upper passage 9 and the upper wall 12b of the cooler chamber 12 are connected by an inclined surface 12a. A straight line D connecting the blower fan 10 and the return port 12c is substantially parallel to the inclined surface 12a. Accordingly, when the cool air returns to the inside of the cooler chamber 12 through the return port 12c, the airflow at the right end portion of the cooler chamber 12 can be guided to the upper passage 9 without being stopped. Therefore, the pressure loss in the cold air passage 7 can be reduced.

FIG. 7 shows a schematic perspective view of the vegetable compartment 5. An avoidance portion 5d that avoids interference with the inclined surface 12a is provided between the rear portion of the partition portion 19 forming the bottom wall of the vegetable compartment 5 and the rear portion of the partition portion 20 forming the left side wall. The avoidance part 5d is integrally formed by the partition part 19 and the partition part 20, and the avoidance part 5d is filled with the heat insulating material 13. A chamfer (not shown) is formed between the side wall and the bottom wall of the storage case 50 (see FIG. 4) in the vegetable compartment 5 to avoid interference with the avoidance portion 5d.

In the refrigerator 1 having the above structure, the compressor 31 and the blower fan 10 are driven to exchange heat between the air flowing through the cooler chamber 12 and the cooler 11 to generate cool air. The cool air generated in the cooler 11 flows through the upper passage 9, is discharged from the discharge port 9a into the ice making chamber 25, and is discharged from the discharge port 9b into the freezing chamber 26. Further, the cool air flows through the lower passage 29 and is discharged into the freezer compartment 6 from the discharge ports 29a, 29b, 29c. The cold air discharged into the ice making chamber 25, the freezing chamber 26, and the freezing chamber 6 flows through each storage chamber and returns to the cooler 11 via the return port 9c. At this time, since the upper passage 9 passes behind the frozen compartment 21 while avoiding the rear of the vegetable compartment 5, the temperature rise of the cold air due to the temperature of the vegetable compartment 5 is suppressed. Thereby, the ice-making chamber 25, the freezing chamber 26, and the freezing chamber 6 are cooled.

When the damper 23 is opened, cold air flows into the refrigerating passage 8 of the upper passage 9 and is discharged into the refrigerating chamber 4 through the discharge ports 8a, 8b, 8c, 8d, 8e and 8f. The discharged cool air flows to the front of the refrigerating chamber 4, then flows downward, and flows out from the communication port 4f. Thereby, the inside of the refrigerator compartment 4 is cooled.

Then, the cool air is discharged into the vegetable compartment 5 through the communication port 4f, flows from the front part to the rear part in the vegetable compartment 5, and returns to the cooler chamber 12 from the return port 12c through the return passage 34. At this time, the width L3 of the uppermost fin forming portion 40 of the cooler 11 is smaller than the width L4 of the lowermost fin forming portion 40, and the uppermost portion is biased toward the upper passage 9 side. Since the cool air flowing from the lower side to the upper side in the cooler chamber 12 is guided to the upper passage 9 which is biased to the left, the heat exchange amount is reduced even if the width L3 of the fin forming portion 40 at the uppermost stage of the cooler 11 is narrowed. Can be suppressed. Therefore, the cost of the refrigerator 1 can be reduced by reducing the fins 40a. Further, since the width L1 of the uppermost refrigerant pipe 41 of the cooler 11 is smaller than the width L2 of the lowermost refrigerant pipe 41, the cooler 11 can be downsized to save space in the cooler chamber 12. ..

Further, the defrosting operation of the cooler 11 is performed at a predetermined time. When the defrosting operation is started, the compressor 31 is stopped and the defrosting heater 46 is driven. The radiant heat of the defrost heater 46 raises the temperature of the cooler 11 and the accumulator 42, and when the thermistors 45a and 45b reach a predetermined temperature (10° C. in the present embodiment), the defrost heater 46 is stopped and the defrost operation is stopped. To do.

At this time, the thermistor 45 a detects the temperature of the upper part of the cooler 11 which is separated from the defrost heater 46. The thermistor 45b stores the low temperature refrigerant and detects the temperature of the accumulator 42 which is lower than the cooler 11. Therefore, by stopping the defrosting operation by detecting the thermistor 45a and the thermistor 45b, the entire cooler 11 can be reliably heated to the defrosting temperature and defrosted.

Further, the shield plate 44 shields between the cooler 11 and the accumulator 42. For this reason, when the cool air returns to the cooler chamber 12 through the cool air return ports 9c and 12c, the cool air avoids colliding with the accumulator 42 and collides with the cooler 11 to exchange heat with the cooler 11. it can. Thereby, the heat exchange efficiency can be improved.

According to the present embodiment, the cooler chamber 12 in which the cooler 11 is arranged is provided behind the freezing chamber 6 from below the freezing compartment 21 to below the vegetable chamber 5, and the upper part extending upward from the cooler chamber 12 is provided. The passage 9 passes behind the freezing compartment 21 while avoiding the back of the freezing compartment 6. Therefore, the temperature rise of the cool air flowing through the upper passage 9 is suppressed, and the cooling capacity of the refrigerator 1 can be improved.

Further, the uppermost fin forming portion 40 of the cooler 11 formed in a plurality of stages is formed to have a width in the left-right direction smaller than that of the lowermost fin forming portion 40, and is arranged biased to the upper passage 9 side. As a result, the cool air flowing from the lower side to the upper side in the cooler chamber 12 is guided to the upper passage 9 that is biased to one side in the left-right direction, so that the heat exchange amount is reduced even if the width of the fin forming portion 40 at the uppermost stage is narrowed. Can be suppressed. Therefore, the cost of the refrigerator 1 can be reduced by eliminating the fins 49a.

Further, since the width L1 of the uppermost refrigerant pipe 41 of the cooler 11 is smaller than the width L2 of the lowermost refrigerant pipe 41, the cooler 11 can be downsized to save space in the cooler chamber 12. Therefore, the volumetric efficiency of the refrigerator 1 can be improved.

Further, return ports 12c and 9c for returning the cool air to the cooler chamber 12 are provided in a lower portion of the cooler chamber 12 opposite to the upper passage 9. Therefore, the entire cool air flowing from the return ports 12c and 9c to the upper passage 9 can be surely brought into contact with the cooler 11, and the heat exchange efficiency of the refrigerator 1 can be improved.

Further, since the accumulator 42 is arranged laterally on the opposite side of the upper passage 9 with respect to the cooler 11, it is possible to reduce the pressure loss of the circulation of cold air as compared with the case where the accumulator 42 is arranged above the cooler 11. Further, the accumulator 42 can be installed by effectively utilizing the space in the left-right direction of the cooler chamber 12 formed from below the freezing compartment 21 to below the vegetable compartment 5.

Further, since the defrosting operation is stopped when the defrosting operation is started and the thermistor 45a and the thermistor 45b reach a predetermined temperature, it is possible to reliably defrost the entire cooler 11.

Further, since the shielding plate 44 that shields the cooler 11 and the accumulator 42 is provided, the cool air can directly exchange heat with the cooler 11 while avoiding the accumulator 42, so that the heat exchange efficiency can be improved.

Further, since the side wall 9d of the upper passage 9 and the upper wall 12b of the cooler chamber 12 are connected by the inclined surface 12a, when the cool air returns to the cooler chamber 12 through the return port 12c, the right end of the cooler chamber 12 It is possible to guide the flow of air to the upper passage 9 without stopping.

<Second Embodiment>
Next, FIG. 8 shows a front view of the main body 2 of the refrigerator 1 according to the second embodiment. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. 1 to 7 are given the same reference numerals. In this embodiment, the shape of the upper passage 9 is different from that of the first embodiment. Other parts are the same as those in the first embodiment.

The upper passage 9 is provided with divided passages 32a and 32b divided into left and right by a partition wall 32c extending vertically between the blower fan 10 and the damper 23. Discharge ports 9a and 9b are opened in the left divided passage 32b, and the blower fan 10 and the damper 23 are connected by the right divided passage 32a.

Thereby, when the damper 23 is opened, the cool air can be smoothly guided to the refrigeration passage 8 above the damper 23. Further, it is possible to prevent a decrease in the cold air introduced into the refrigeration passage 8 due to the cold air discharged from the discharge ports 9a and 9b. Therefore, it is possible to reduce the supercooling of the freezer compartments 6 and 26 and the ice making compartment 25 when the refrigerating compartment 4 and the vegetable compartment 5 are cooled.

Further, when the upper passage 9 is not provided with the divided passages 32a and 32b, when the cooler 11 is clogged and the air volume of the upper passage 9 from the blower fan 10 to the discharge port 9a of the ice making chamber 25 decreases, the damper 23 opens. When the blower fan 24 is driven by the above, a backflow that sucks cool air from the discharge port 9a may occur. However, in the present embodiment, since the cool air blown out from the blower fan 10 is immediately branched by the divided passages 32a and 32b, it is possible to reliably prevent the backflow from the discharge port 9a and improve the cooling efficiency of the refrigerator 1. ..

According to this embodiment, the same effect as that of the first embodiment can be obtained. Further, since the upper passage 9 has the divided passages 32a and 32b, it is possible to smoothly guide the cool air to the refrigerating passage 8 and reduce the supercooling of the freezing chambers 6 and 26 and the ice making chamber 25.

In the present embodiment, the upper passage 9 may be divided in the front-rear direction by the partition wall 32c, and the divided passage 32a may be arranged behind the divided passage 32b.

<Third Embodiment>
Next, FIG. 9 shows a front view of the main body 2 of the refrigerator 1 according to the third embodiment, and FIG. 10 shows a sectional view taken along line CC of FIG. 9. For convenience of explanation, the same parts as those in the first embodiment shown in FIGS. 1 to 7 are given the same reference numerals. The present embodiment is different from the first embodiment in that a blower fan 33 is provided. Other parts are the same as those in the first embodiment.

The blower fan 33 is provided behind the discharge port 29d. By driving the cooler 11, the blower fan 10, and the blower fan 33, cool air is discharged into the freezer compartment 6. At this time, even if the discharge port 29d is separated from the blower fan 10, the blower fan 33 reliably discharges the cool air from the discharge port 29d into the freezer compartment 6. Thereby, the cool air is dispersed and discharged from the discharge ports 29a to 29d, and the temperature in the freezer compartment 6 can be made uniform. A plurality of discharge ports 29d may be provided at the right end of the freezer compartment 6.

According to this embodiment, the same effect as that of the first embodiment can be obtained. Further, by providing the blower fan 33, the temperature inside the freezer compartment 6 can be made uniform. The blower fan 33 may be provided in the second embodiment.

INDUSTRIAL APPLICABILITY According to the present invention, it can be used in a refrigerator having a cold air passage.

1 Refrigerator 2 Main body 3 Insulation box 4 Refrigerator (first refrigerator)
4b, 4c, 4d, 4e Shelf 4f Communication port 5 Vegetable room (second refrigerating room)
5a Door 5b Side wall 5c Rear wall 5d Avoidance part 6 Freezer 6a Door 6b, 6c, 6d Storage case 7 Cold air passage 7a, 7b Panel 8 Refrigerating passage 8a, 8b, 8c, 8d, 8e, 8f Discharge port 9 Upper passage 9a , 9b Discharge port 9c Return port 9d Side wall 10 Blower fan 11 Cooler 12 Cooler chamber 12a Inclined surface 12b Upper wall 12c Return port 12d Side wall 13 Insulation material 14 Outer box 15 Inner box 17 Storage case 18, 19, 20 Partition section 21 Freezing compartment 23 Damper 24 Blower fan 25 Ice making room 25a Door 25b Ice storage case 26 Freezing room 26a Door 26b Storage case 27 Partition plate 29 Lower passage 29a, 29b, 29c, 29d Discharge port 30 Machine room 31 Compressor 32a Split passage 32b Split Passage 33 Blower fan (second blower)
34 Return Passages 35, 36 Partition Part 40 Fin Forming Part 40a Fin 41 Refrigerant Pipe 42 Accumulator 43 End Plate 44 Shielding Plate 44a Shielding Chamber 45a Thermistor (First Thermistor)
45b Thermistor (second thermistor)
46 Defrost Heater 50 Storage Case 51 Small Case 70 Chilled Room 70a Storage Case 71 Storage Case 72 Water Storage Tank 73 Small Room

Claims (5)

A first refrigerating chamber that is maintained at a refrigerating temperature, a freezing chamber that is arranged below the first refrigerating chamber and that is maintained at a freezing temperature, and one side in the left-right direction between the first refrigerating chamber and the freezing chamber. A second refrigerating chamber, which is unevenly arranged and is maintained at the refrigerating temperature, is disposed between the first refrigerating chamber and the freezing chamber adjacent to the side of the second refrigerating chamber, and is maintained at the freezing temperature. And a cool air passage having a cooler formed in a plurality of stages by meandering of a refrigerant pipe having a fin forming portion in which a plurality of fins are arranged in parallel, and cool air is provided via the cool air passage. In the first refrigerating compartment, the second refrigerating compartment, the freezing compartment and the refrigerator discharging to the freezing compartment,
The cool air passage is provided with the cooler, and the cooler chamber is provided behind the freezing compartment from below the freezing compartment to below the second refrigerating compartment, without passing through the rear of the second refrigerating compartment. An upper passage extending upward from the cooler chamber through the rear of the freezing compartment,
The fin forming portion at the uppermost stage of the cooler is formed to have a width in the left-right direction smaller than that of the fin forming portion at the lowermost stage, and is arranged biased to the upper passage side ,
A communication port for communicating the first refrigerating chamber and the second refrigerating chamber, a return port for returning the cool air flowing through the second refrigerating chamber to the cooler chamber, the second refrigerating chamber and the return port. Has a return passage to connect,
The refrigerator according to claim 1, wherein the communication port and the return passage are arranged on a side opposite to the upper passage side . The refrigerator according to claim 1, wherein the return port is provided in a lower portion of the cooler chamber opposite to the upper passage. An accumulator for accumulating the refrigerant flowing out of the cooler is provided, the accumulator is arranged on a side opposite to the upper passage with respect to the cooler, and is provided below the cooler for defrosting. The refrigerator according to claim 1 or 2, wherein one end of the frost heater is formed to extend below the accumulator. The defrost heater, a first thermistor that detects the temperature of the upper part of the cooler, and a second thermistor that detects the temperature of the accumulator are provided, and the defrosting operation is started to cause the first thermistor and the second thermistor to operate. The refrigerator according to claim 3, wherein the defrosting operation is stopped when the temperature reaches a predetermined temperature. The refrigerator according to claim 3, further comprising a shield plate that shields the cooler and the accumulator.

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