JP6709348B2 - refrigerator - Google Patents

Description

TECHNICAL FIELD The present invention relates to a refrigerator that cools and stores foods and the like in a storage chamber, and particularly relates to a refrigerator that can achieve uniform frost formation on a cooler.

Conventionally, there is a refrigerator that has a storage chamber partitioned into a plurality of storage chambers having different cold storage temperatures, such as a refrigerating chamber and a freezing chamber, and forcibly circulates air cooled by a cooler provided in the cooling chamber to the storage chamber. .. In this type of refrigerator, the outlet of the refrigerating compartment return air passage that returns air from the refrigerating compartment to the cooling compartment is formed in the lower part of the side surface of the cooling compartment, and the outlet of the freezing compartment return air duct that returns air from the freezing compartment to the cooling compartment is formed. It is known that it is formed in the lower part of the front surface of the cooling chamber.

For example, the refrigerator disclosed in Patent Document 1 has a storage compartment divided into an upper refrigerating compartment, an intermediate freezing compartment and a lower vegetable compartment, and from the refrigerating compartment to a cooling compartment in which a cooler is arranged. Equipped with a return air passage for air flow. This return air passage is connected to the side surface of the cooling chamber, and the return cool air from the refrigerating chamber flows to the lower side surface of the cooler. A return port is formed in the lower part of the front surface of the cooling chamber, which is connected to a return port formed in the lower surface of the lower part of the freezing chamber and sucks the return cool air from the freezing chamber into the inside of the cooling chamber.

Further, for example, the refrigerator described in Patent Document 2 has a storage compartment divided into an upper refrigerating compartment, a middle vegetable compartment, and a lower freezing compartment. In the refrigerator of the same document, a high temperature suction port which is an outlet of the refrigerating chamber return air passage is provided near the lower end of the cooler on the side surface of the cooling chamber. The freezer inlet port that is the outlet of the freezer return passage is arranged in the center of the cooler in a front view along the drain pan that forms the bottom surface of the cooling chamber.

In the refrigerator of the same document, the freezer compartment inlet is configured to be larger than the area of the inlet of the freezer compartment return air passage, and the width of the freezer compartment inlet is expanded to the width of the cooler. As a result, even when cold air circulates only in the freezer, the entire cooler can be used and the cooling capacity can be improved.

Further, in the refrigerator of the document, the fin pitch of the cooler is set to be larger in the side portion than in the central portion. As a result, the return cold air from the refrigerating room with a high absolute humidity causes frost to grow on the side of the cooler with a large fin pitch, and the return cool air from the freezing room with a low absolute humidity is in the center of the cooler with a small fin pitch. Grow frost on the part. As a result, it is possible to suppress an increase in passage resistance due to frost formation on the cooler, suppress a decrease in cooling performance due to a reduction in the air volume, and ensure stable cooling performance.

JP, 2005-55377, A JP, 2015-45437, A

However, as in the above-described conventional technique, in the refrigerator in which the outlet of the refrigerating compartment return air passage is formed in the lower portion of the side surface of the cooling chamber and the outlet of the freezing compartment return air passage is formed in the lower portion of the front surface of the cooling chamber, the refrigerator return There is a problem that frost is unevenly grown near the lower side surface of the cooler near the outlet of the air passage.

In other words, the return cold air from the refrigerating compartment has a higher absolute humidity than the return cool air from the freezing compartment, so that much frost adheres to the vicinity of the lower side surface of the cooler which is easy to come into contact with the return cool air from the refrigerating compartment. .. Further, since the flow rate of the return cool air from the refrigerating room is smaller than that of the return cool air from the freezing room, the return cool air from the refrigerating room is obstructed by the flow of the return cool air from the freezing room, and Difficult to flow to the center. Therefore, frost is likely to grow in the vicinity of the lower side surface of the cooler, which is near the exit of the return air passage of the refrigerator compartment.

As described above, when the frost is unevenly distributed in the vicinity of the lower side surface of the cooler, the flow of air from the refrigerating compartment is obstructed, the flow rate of air circulating in the refrigerating compartment is reduced, and the cooling capacity of the refrigerating compartment is reduced. . Further, when the frost is concentrated near the lower side surface of the cooler, the defrosting operation time for melting the frost adhering to the cooler becomes long and the power consumption for defrosting increases. Further, as the time of the defrosting operation becomes long, the temperature rise in the storage chamber due to the defrosting operation becomes a problem, and the amount of electric power required for cooling after the defrosting may increase.

In the refrigerator described in Patent Document 2 described above, the fin pitch on the side portion of the cooler is set to be larger than the fin pitch on the central portion. However, even in a cooler adopting such a configuration, the cooler is also a cooler. Frost is concentrated near the lower side surface of the refrigerator, and the flow of return cold air from the refrigerating compartment is obstructed. In other words, the above-mentioned conventional technology has room for improvement in order to make the frost on the cooler uniform.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a refrigerator capable of achieving uniform frost formation on a cooler and improving cooling performance. ..

The refrigerator of the present invention is provided with a storage chamber that is divided into at least a refrigerating chamber and a freezing chamber, a cooler that cools air supplied to the storage chamber via a supply air passage, and the cooler. A cooling chamber, a cooling chamber return air passage that connects the cooling chamber and the cooling chamber to allow air from the cooling chamber to flow to the cooling chamber, and connects the freezing chamber and the cooling chamber from the freezing chamber. And a freezer return air passage for flowing the air into the cooling chamber, the outlet of the refrigerator return air passage is formed near one side surface of the cooling chamber, the outlet of the freezer return air passage is Formed on the front surface side of the cooling chamber and having a widthwise dimension smaller than the width of the cooler and formed closer to the other side surface opposite to the one side surface , the freezer compartment return air passage Is formed in the lower part of the inner surface of the freezer compartment and has a larger dimension in the width direction than the outlet of the freezer compartment return air passage .

In addition, the refrigerator of the present invention includes at least a storage compartment that is divided into a refrigerating compartment and a freezing compartment, a cooler that cools air supplied to the storage compartment through a supply air passage, and the cooler. A cooling chamber provided, a refrigerating chamber return airflow path connecting the refrigerating chamber and the cooling chamber to allow air from the refrigerating chamber to flow to the cooling chamber, and the freezing unit by connecting the freezing chamber and the cooling chamber And a freezer return air passage for flowing air from the chamber to the cooling chamber, the outlet of the refrigerator return air passage is formed in the vicinity of one side surface of the cooling chamber, The outlet is formed on the front surface side of the cooling chamber, has a dimension in the width direction smaller than the width of the cooler, and is formed closer to the other side surface that is the opposite side than the one side surface. A wall portion that closes the freezer compartment return air passage is formed on the one side surface side with respect to the outlet of the air passage.

Further, in the refrigerator of the present invention, the cooling chamber is formed on the back side of the freezing chamber, and the freezing chamber return air passage is assembled in front of a partition member that divides the freezing chamber and the cooling chamber. It is characterized by being formed by a front cover.

Further, in the refrigerator of the present invention, the cooler includes a refrigerant pipe and fins provided on an outer surface thereof, and an interval between the fins on the one side surface side is equal to that of the fin on the other side surface side. It is characterized by being larger than the interval.

According to the refrigerator of the present invention, the outlet of the refrigerating compartment return air passage is formed in the vicinity of one side surface of the cooling chamber, and the outlet of the freezing compartment return air passage is formed on the front surface side of the cooling chamber, in the width direction. The dimension is smaller than the width of the cooler, and is formed closer to the other side surface that is the opposite side to the one side surface. As a result, the return cold air from the refrigerating chamber is less likely to be pushed by the flow of the return cool air from the freezing chamber, and easily flows toward the center of the cooler. As a result, the return cool air from the refrigerating room and the return cool air from the freezing room are preferably mixed, and the frost formation on the cooler is made uniform, and near one side of the cooling room, that is, near the exit of the refrigerating room return air passage. It is possible to suppress concentrated frost formation near the lower side surface of the cooler. Therefore, it is possible to suppress a decrease in the cooling capacity of the refrigerating chamber due to the uneven frost formation, an increase in power consumption related to the defrosting operation, a temperature increase in the storage chamber, and the like, and improve the cooling performance of the refrigerator. You can

Further, even if there is a large amount of frost near the lower side surface of the cooler that is near the outlet of the refrigerating compartment return air passage, the return cool air from the refrigerating compartment tends to flow toward the center of the cooler. It is possible to suppress a decrease in the amount of circulating air in the refrigerator compartment due to frost formation.

Further, according to the present invention, the inlet of the freezer compartment return air passage is formed in the lower portion of the inner surface of the freezer compartment, and has a larger dimension in the width direction than the outlet of the freezer compartment return air passage. By forming the inlet of the freezer compartment return air passage to have a large size in the width direction in this manner, unevenness and retention of the air flow in the refrigerator compartment can be suppressed, and the inside of the refrigerator compartment can be cooled appropriately. Since the width of the outlet of the freezer compartment return air passage is formed to be small in width, it is possible to make frost on the cooler uniform as described above.

Further, according to the present invention, a wall portion that closes the freezing compartment return air passage is formed on the one side surface side with respect to the outlet of the freezing compartment return air passage. With such a configuration, it is possible to suppress an increase in the number of parts and the number of assembling steps, maintain the ease of assembly, and reduce the widthwise dimension of the outlet of the freezer compartment return air passage.

Further, according to the present invention, the cooling chamber is formed on the inner side of the freezing chamber, and the freezing chamber return air passage is assembled in front of a partition member that divides the freezing chamber and the cooling chamber. Formed by the front cover. This makes it possible to easily form the freezer compartment return air passage capable of achieving uniform frost formation in the cooler by a simple assembly work.

Further, according to the present invention, the cooler has a refrigerant pipe and fins provided on an outer surface thereof, and a distance between the fins on the one side surface side is equal to that of the fin on the other side surface side. Greater than the interval. As a result, in the vicinity of the outlet of the refrigerating compartment return air passage, the air passage between the fins is prevented from being blocked by frost, and the reduction of the circulating air volume of the refrigerating compartment due to frost can be suppressed more effectively. .

It is a front external view of the refrigerator which concerns on embodiment of this invention. It is a side sectional view showing a schematic structure of a refrigerator concerning an embodiment of the present invention. 1 is a schematic front view showing a schematic configuration of an air passage of a refrigerator according to an embodiment of the present invention. It is a front view showing the inside of the freezer compartment of the refrigerator concerning the embodiment of the present invention. It is the sectional view on the AA line which shows the cooling chamber vicinity of the refrigerator which concerns on embodiment of this invention. It is a perspective view showing the composition of the back of the freezer compartment of the refrigerator concerning the embodiment of the present invention. It is the perspective view which looked at the front cover of the refrigerator concerning the embodiment of the present invention from the slanting lower part. It is a figure which shows the lower part of the cooling chamber of the refrigerator which concerns on embodiment of this invention, (A) is a BB sectional drawing, and (B) is a CC sectional drawing. It is the perspective view which looked at the inside of the freezing room and the cooling room of the state which removed the partition member of the refrigerator concerning the embodiment of the present invention from the front.

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

FIG. 1 is a front external view showing a schematic structure of a refrigerator 1 according to an embodiment of the present invention. As shown in FIG. 1, the refrigerator 1 includes a heat insulating box 2 as a main body, and a storage chamber for storing food and the like is formed inside the heat insulating box 2. The inside of this storage chamber is divided into a plurality of storage chambers according to the storage temperature and use. The uppermost stage is the refrigerating chamber 3, the lower stage is the ice making chamber 4, the right side is the upper stage freezing chamber 5, and the lower stage is the lower stage. The freezer compartment 6 and the vegetable compartment 7 at the bottom. The ice making chamber 4, the upper freezing chamber 5, and the lower freezing chamber 6 are all storage chambers in the freezing temperature range, and are collectively referred to as a freezing chamber 4A in the description below.

The front surface of the heat insulating box 2 is open, and heat insulating doors 8 to 12 are provided at the openings corresponding to the respective storage chambers so as to be openable and closable. The heat insulating doors 8a and 8b divide and close the front surface of the refrigerating chamber 3, and the upper left lower part of the heat insulating door 8a and the upper right lower part of the heat insulating door 8b are rotatably supported by the heat insulating box 2. The heat insulating doors 9 to 12 are integrally combined with the storage container, and are supported by the heat insulating box body 2 so as to be freely drawn out in front of the refrigerator 1.

FIG. 2 is a side sectional view showing a schematic structure of the refrigerator 1. As shown in FIG. 2, the heat insulating box 2 which is the main body of the refrigerator 1 is an outer box 2a made of a steel plate having an opening on the front side, and a composite box having a front side opening provided with a gap in the outer box 2a. It is composed of a resin inner box 2b. A heat insulating material 2c made of polyurethane foam is filled and foamed in the gap between the outer box 2a and the inner box 2b. The heat insulating doors 8 to 12 also have the same heat insulating structure as the heat insulating box 2.

The refrigerating compartment 3 and the freezing compartment 4A located below it are separated by a heat insulating partition wall 36. The interior of the freezing compartment 4A is separated from the upper freezing compartment 5 by the partition wall (not shown). Further, the ice making chamber 4 and the upper stage freezing chamber 5 and the lower stage freezing chamber 6 provided at the lower stage thereof are in communication so that cold air can freely flow therethrough. The freezer compartment 4A and the vegetable compartment 7 are divided by a heat insulating partition wall 37.

On the rear surface of the refrigerating compartment 3, a refrigerating compartment supply air passage 14 is formed as a supply air passage for supplying cold air to the refrigerating compartment 3 by partitioning with a partition 40 made of synthetic resin. The refrigerating compartment supply air passage 14 is formed with an outlet 17 through which cold air flows into the refrigerating compartment 3. A refrigerating compartment damper 28 is provided in the refrigerating compartment supply air passage 14. The refrigerating compartment damper 28 is a damper that is driven by a motor or the like and can be opened and closed, and is for controlling the flow rate of the cool air supplied to the refrigerating compartment 3 to appropriately maintain the temperature inside the refrigerating compartment 3. ..

A freezer compartment supply air passage 15 as a supply air passage through which the cool air cooled by the cooler 32 flows to the freezer compartment 4A is formed on the inner side of the freezer compartment 4A. The freezer compartment supply air passage 15 is a space formed between the partition member 42 made of synthetic resin and the front cover 41 made of synthetic resin mounted in front of the partition member 42. The front cover 41 is formed with an air outlet 18 which is an opening for blowing cold air into the freezer compartment 4A.

The cooling chamber 13 is formed further on the inner side of the freezing chamber supply air passage 15 by being partitioned by the partition member 42. That is, the cooling chamber 13 is a space sandwiched between the inner box 2 b and the partition member 42. Inside the cooling chamber 13, a cooler 32, which is an evaporator for cooling the air circulating in the refrigerator, is provided.

The cooler 32 is, for example, a fin-and-tube heat exchanger having a plurality of substantially plate-shaped fins and a refrigerant pipe penetrating the fins. The cooler 32 is connected to the compressor 31, a radiator (not shown), and a capillary tube or an expansion valve (not shown) via a refrigerant pipe. This constitutes a vapor compression refrigeration cycle circuit.

An inlet 24 of the freezer compartment return air passage 21 for returning air from the freezer compartment 4A to the cooling compartment 13 is formed on the lower rear surface of the lower stage freezer compartment 6. The outlet 27 of the freezer compartment return air passage 21 is formed in the lower portion on the front surface side of the cooling chamber 13. That is, the freezer compartment return air passage 21 is connected to the lower front surface of the cooling chamber 13.

Further, below the cooler 32, a defrost heater 33 is provided as defrosting means for melting and removing the frost attached to the cooler 32. The defrost heater 33 is an electric resistance heating type heater.

A blower port 13a, which is an opening connected to each storage chamber, is formed in the upper portion of the partition member 42. That is, the blower port 13a is an opening through which cool air cooled by the cooler 32 flows, and the cooling chamber 13, the refrigerating compartment supply air passage 14, the freezing compartment supply air passage 15, and the vegetable compartment supply air passage 16 (see FIG. 3). ) And communicate. A blower 34 that blows cold air to the freezer compartment 4A or the like is arranged at the blower port 13a.

In addition, a shielding device 30 including a blower cover that opens and closes the blower opening 13a may be provided on the front surface side of the blower opening 13a of the cooling chamber 13. The main function of the shielding device 30 is to appropriately open or close the blower opening 13a provided with the blower 34 to supply the cool air blown out by the rotation of the blower 34 to a desired storage chamber. .. Further, by closing the shielding device 30, the warm air generated in the defrosting process of the cooler 32 is prevented from flowing into the freezer compartment 4A and the like.

FIG. 3 is a schematic front view showing the schematic configuration of the air passage of the refrigerator 1. As shown in FIG. 3, the refrigerating compartment supply air passage 14 for supplying the cool air to the refrigerating compartment 3 is configured to send the cool air to the uppermost portion in the central portion of the refrigerating compartment 3 and then descend from both sides. ing. As a result, cold air can be efficiently supplied to the entire inside of the refrigerating chamber 3.

The refrigerator 1 includes a refrigerating compartment return air passage 20 that allows air to flow from the refrigerating compartment 3 to the cooling compartment 13 (see FIG. 2 ). A return port 23, which is an inlet of the refrigerating compartment return air passage 20, is formed in the lower part of the refrigerating compartment 3. Further, an outlet 26 of the refrigerating compartment return air passage 20 is formed in the lower part of the side surface of the cooling compartment 13. As a result, the air in the refrigerating compartment 3 flows from the return port 23 to the refrigerating compartment return air passage 20 and then to the lower side of the cooler 32 via the outlet 26.

Further, in front of the refrigerating compartment return air passage 20, a vegetable compartment supply air passage 16 is formed as a supply air passage for flowing the air cooled by the cooler 32 to the vegetable compartment 7. The vegetable compartment supply air passage 16 branches upward from the freezing compartment supply air passage 15 and turns downward via the inside of the heat insulating partition wall 36 (see FIG. 2) above the freezing compartment 4A, Passing the depths of 4A. Then, it penetrates the heat insulating partition wall 37 (see FIG. 2) and is connected to the vegetable compartment 7. The vegetable compartment 7 is formed with an air outlet 19 which is an opening for blowing cold air from the vegetable compartment supply air passage 16.

The vegetable compartment supply air passage 16 is provided with a vegetable compartment damper 29 that controls the flow of cold air supplied to the vegetable compartment 7. Thereby, the vegetable compartment 7 can be cooled independently of the refrigerating compartment 3 and the temperature of the vegetable compartment 7 can be appropriately controlled.

A return port 25 is formed in the vegetable compartment 7, and the air in the vegetable compartment 7 flows from the return port 25 to the lower part of the cooling chamber 13 via the vegetable compartment return air passage 22 (see FIG. 2). ..

FIG. 4 is a front view showing the inside of the freezer compartment 4A of the refrigerator 1, and shows a state in which the heat insulating doors 8 to 12 shown in FIG. 1 are removed. As shown in FIG. 4, the inlet 24 of the freezer compartment return air passage 21 formed in the lower part of the inner surface of the freezer compartment 4A has a width dimension, that is, a horizontal dimension, which is substantially the same as the width of the cooler 32. As shown in FIG. Further, the inlet 24 of the freezer compartment return air passage 21 has a larger dimension in the width direction than the outlet 27 of the freezer compartment return air passage 21.

By forming the inlet 24 of the freezer compartment return air passage 21 to have a large size in the width direction in this manner, uneven distribution and retention of the air flow in the freezer compartment 4A are suppressed, and the inside of the freezer compartment 4A is preferably cooled. You can

Further, as described above, the outlet 26 of the refrigerating compartment return air passage 20 is formed on one side surface of the cooling chamber 13, that is, on the lower portion of the right side surface. The outlet 27 of the freezer compartment return air passage 21 has a dimension in the width direction smaller than the width of the cooler 32, and the outlet 26 of the refrigerator compartment return air passage 20 is formed. It is formed closer to the other side surface which is the opposite side of the one side surface, that is, the left side surface. In other words, the outlet 27 of the freezer compartment return air passage 21 is formed not to the central portion of the cooler 32 but to the left side when viewed from the front.

FIG. 5 is a horizontal cross-sectional view showing the vicinity of the cooling chamber 13 of the refrigerator 1, and shows a cross section taken along the line AA in FIG. As shown in FIG. 5, the cooling chamber 13 is defined by the partition member 42 assembled to the inner box 2b, and the cooler 32 is disposed in the cooling chamber 13. Further, the partition member 42 and the front cover 41 attached to the front of the partition member 42 define the freezer compartment supply air passage 15.

A vegetable compartment air passage cover 43 is attached to the cooling compartment 13 on the inner side of the freezing compartment 4A and the inner box 2b on the right side of the freezing compartment supply air passage 15. Then, the space defined by the vegetable compartment air passage cover 43, that is, the space sandwiched by the vegetable compartment air passage cover 43 and the inner box 2b is assembled into a substantially cylindrical shape forming the vegetable compartment supply air passage 16. The duct members 44 and 45 are provided.

A refrigerating compartment return air passage 20 is formed further inside the vegetable compartment supply air passage 16 by the duct member 45 and the inner box 2b. The refrigerating compartment return air passage 20 is connected to the cooling compartment 13 below the cooler 32 from the side of the cooling compartment 13, that is, from the right side.

FIG. 6 is a perspective view showing the configuration of the back surface of the freezer compartment 4A of the refrigerator 1. In FIG. 6, for the sake of explanation, the refrigerator 1 is shown as a partially cutaway view in which a portion near the rear surface is broken near the upper surface of the freezer compartment 4A and a portion at the front is broken along an appropriate curved surface. Below the fracture surface near the back surface, there are a cooling chamber 13 (see FIG. 2) and a freezing chamber supply air passage 15 (see FIG. 2) which are not shown in the figure.

As shown in FIG. 6, a front cover 41 and a partition member 42 are attached to the back of the freezer compartment 4A. Specifically, the front cover 41 and the partition member 42 are overlapped with each other in the front-rear direction and engage with each other, whereby the freezer compartment supply air passage 15 (see FIG. 2) and the freezer compartment return air passage 21 (see FIG. 2) are formed. It is formed. With such a configuration, the freezer compartment return air passage 21 can be easily formed by a simple assembly work.

Then, the front cover 41 and the partition member 42 are fixed to the inner box 2b of the heat insulating box body 2 by fastening members such as screws and clips. Thereby, the cooling chamber 13 (see FIG. 2) is formed between the partition member 42 and the inner box 2b. As described above, the front cover 41 is formed with the air outlet 18 for blowing cold air into the freezing compartment 4A and the inlet 24 of the freezing compartment return air passage 21 into which the return cold air from the freezing compartment 4A flows.

FIG. 7 is a perspective view of the front cover 41 and the partition member 42 of the refrigerator 1 as seen obliquely from below. As shown in FIG. 7, an inlet 24 of the freezer compartment return air passage 21 connected to the freezer compartment 4</b>A is formed in the lower front portion of the front cover 41, and a lower surface of the front cover 41 is connected to the cooling compartment 13 to the freezer compartment return passage 21. An opening serving as an outlet 27 of the air passage 21 is formed.

The freezer compartment return air passage 21 is a space formed by being sandwiched between the front cover 41 and the partition member 42 at the back. The outlet 27 of the freezer compartment return air passage 21 is opened to blow air downward. In addition, a substantially plate-shaped guide portion 48 extending downward is formed at the lower portion of the partition member 42.

On the lower surface of the front cover 41, a wall portion 47 that closes a part of the freezer compartment return air passage 21 is formed. Specifically, the wall portion 47 that closes the freezer compartment return air passage 21 is on the right side of the outlet 27 of the freezer compartment return air passage 21, that is, the outlet 26 (see FIG. 4) of the refrigerating compartment return air passage 20 (see FIG. 4 ). (See reference) is formed on the one side surface side.

With such a configuration, an increase in the number of parts and the number of assembling steps is suppressed, and while maintaining the ease of assembly, the outlet 27 of the freezer compartment return air passage 21 is formed by the combination of the front cover 41 and the partition member 42 at the back. The size in the width direction of can be formed small.

Here, the size of the outlet 27 of the freezer compartment return air passage 21 in the width direction is 50 to 90%, and preferably 60 to 80%, with respect to the width of the cooler 32 (see FIG. 2). In other words, as described above, the size of the inlet 24 of the freezer compartment return air passage 21 in the width direction is substantially the same as the width of the cooler 32, and therefore the size of the outlet 27 of the freezer compartment return air passage 21 in the width direction. Is 50 to 90% of the widthwise dimension of the inlet 24, and preferably 60 to 90%.

By forming the outlet 27 of the freezer compartment return air passage 21 with such a size ratio, the return cold air from the refrigerating compartment 3 (see FIG. 2) via the refrigerating compartment return air passage 20 and the freezer compartment return air passage 21. The chilled air returned from the freezer compartment 4A via the above is preferably mixed in the lower part of the cooling compartment 13, and frost formation on the cooler 32 can be made uniform.

8: is a figure which shows the lower part of the cooling chamber 13 of the refrigerator 1, FIG. 8(A) is sectional drawing on the BB line shown in FIG. 4, and FIG. 8(B) is C shown in FIG. It is a -C line sectional view. As shown in FIG. 8A, the freezer compartment return air passage 21 is connected to the lower portion of the front side of the cooling chamber 13 via the outlet 27. As a result, the air in the freezer compartment 4A flows into the freezer compartment return air passage 21 from the inlet 24 formed in the lower portion of the rear surface of the freezer compartment 4A, flows downward in the freezer compartment return air passage 21, and exits 27. Through the bottom of the cooling chamber 13.

On the other hand, as shown in FIG. 8B, since the freezing compartment return air passage 21 is closed by forming the wall portion 47, the portion on the right side of the freezing compartment return air passage 21 in which the wall portion 47 is formed. In, the air in the freezer compartment return air passage 21 does not flow into the cooling chamber 13.

As described above, the outlet 27 of the freezer compartment return air passage 21 is opened downward, and the guide member 48 extending downward is formed at the lower part of the partition member 42. .. Therefore, as shown in FIG. 8A, the return cool air that flows into the lower portion of the cooling chamber 13 from the outlet 27 of the freezing compartment return air passage 21 flows under the defrosting heater 33 along the guide portion 48.

As a result, the flow of air from the freezer compartment return air passage 21 efficiently flows in without being obstructed by the defrost heater 33 and the protective cover above it. Further, due to such a flow manner, the return cool air from the refrigerating compartment 3 (see FIG. 2) flowing in from the side of the cooling compartment 13 and the return cool air from the freezing compartment 4A passing through the freezing compartment return air passage 21 are mixed. Is promoted.

FIG. 9 is a perspective view of the inside of the freezer compartment 4A and the cooling compartment 13 of the refrigerator 1 as seen from the front. For the sake of explanation, in FIG. 9, the front cover 41 (see FIG. 6), the partition member 42 (see FIG. 6), the vegetable compartment air duct cover 43 (see FIG. 6), etc. are removed and the cooler 32 and the refrigerating compartment return. The state where the air passage 20 is exposed is shown. Further, in FIG. 9, the flow of the return cool air from the refrigerating compartment 3 (see FIG. 2) flowing into the cooling compartment 13 via the refrigerating compartment return air passage 20 is indicated by an arrow R and via the freezing compartment return air passage 21. The flow of the return cool air from the freezing chamber 4A flowing into the cooling chamber 13 is schematically shown by an arrow F.

As shown by the arrow R in FIG. 9, the return cool air from the refrigerating compartment 3 flows through the refrigerating compartment return air passage 20, passes through the outlet 26, and flows into the lower portion of the side surface of the cooling compartment 13. On the other hand, the return cool air from the freezer compartment 4A flows into the freezer compartment return air passage 21 from the inlet 24 formed in the lower portion of the rear surface of the freezer compartment 4A, passes through the outlet 27, and is cooled by the cooling compartment 13 as shown by the arrow F. Flows into the bottom of.

As described above, in the refrigerator 1, the outlet 26 of the refrigerating compartment return air passage 20 is formed near the right side surface of the cooling chamber 13, and the outlet 27 of the freezer compartment return air passage 21 has a widthwise dimension of the cooler 32. Is smaller than the width of the cooling chamber 13 and is formed closer to the left side surface opposite to the right side surface of the cooling chamber 13 in which the outlet 26 of the refrigerating compartment return air passage 20 is formed.

As a result, the return cool air from the refrigerating chamber 3 is less likely to be pushed by the flow of the return cool air from the freezing chamber 4A, and easily flows toward the center of the cooler 32 as indicated by the arrow R. As a result, the return cool air from the refrigerating compartment 3 and the return cool air from the freezing compartment 4A are mixed appropriately, and the frost on the cooler 32 is made uniform.

Further, it is possible to suppress concentrated frost formation in the vicinity of the right side surface of the cooling chamber 13, that is, in the vicinity of the lower side surface of the cooler 32 which is in the vicinity of the outlet 26 of the refrigerating compartment return air passage 20. Therefore, it is possible to suppress a decrease in the cooling capacity of the refrigerating chamber 3 due to the uneven frost formation, an increase in power consumption related to the defrosting operation, a temperature increase in the storage chamber, and the like, and improve the cooling performance of the refrigerator 1. Can be made

Further, even if there is a large amount of frost near the lower side surface of the cooler 32 that is near the outlet 26 of the refrigerating compartment return air passage 20, the return cool air from the refrigerating compartment 3 is directed toward the center of the cooler 32. Since it is easy to flow to, it is possible to suppress a decrease in the circulating air amount in the refrigerating chamber 3 due to frost formation.

The present invention is not limited to the above embodiment. For example, in the above description, an example in which one side surface of the cooling chamber 13 in which the outlet 26 of the refrigerating compartment return air passage 20 is formed is the right side surface, but a configuration in which these air passages and the like are horizontally reversed is also possible. It is possible. That is, the outlet 26 of the refrigerating compartment return air passage 20 is formed near the left side surface of the cooling chamber 13, and the outlet 27 of the freezer compartment return air passage 21 is formed near the opposite right side surface. good.

Further, the cooler 32 may be formed such that the distance between the fins near the outlet 26 of the refrigerating compartment return air passage 20 is larger than the distance between the fins in other portions. With such a configuration, it is possible to prevent the air flow path between the fins from being blocked by frost in the vicinity of the outlet 26 of the refrigerating compartment return air passage 20, and it is more effective to reduce the amount of circulating air in the refrigerating compartment 3 due to frost. Can be suppressed.

The storage compartments and the storage compartments may be arranged in various ways. For example, the vegetable compartment 7 may not be provided and only the refrigerating compartment 3 and the freezing compartment 4A may be provided. In addition, various modifications can be made without departing from the scope of the present invention.

1 Refrigerator 3 Refrigerator 4A Freezer 4 Ice Maker 5 Upper Freezer 6 Lower Freezer 7 Vegetable Room 13 Cooling Room 14 Refrigerator Room Supply Airway 15 Freezer Room Supply Airway 16 Vegetable Room Supply Airway 18 Outlet 20 Refrigerator Room Return Air passage 21 Freezing room return air passage 22 Vegetable room return air passage 23 Return port 24 Inlet 26 Outlet 27 Outlet 31 Compressor 32 Cooler 34 Blower 41 Front cover 42 Partition member

Claims (5)

A storage room at least divided into a refrigerating room and a freezing room,
A cooler for cooling the air supplied to the storage chamber via a supply air passage,
A cooling chamber in which the cooler is disposed,
A refrigerating compartment return air passage that connects the refrigerating compartment and the cooling compartment and causes air from the refrigerating compartment to flow into the cooling compartment,
A freezing compartment return air passage that connects the freezing compartment and the cooling compartment to allow air from the freezing compartment to flow to the cooling compartment,
An outlet of the refrigerating compartment return air passage is formed near one side surface of the cooling compartment,
The outlet of the freezer compartment return air passage is formed on the front surface side of the cooling chamber, has a widthwise dimension smaller than the width of the cooler, and is closer to the other side surface that is the opposite side than the one side surface. Formed ,
The refrigerator is characterized in that an inlet of the freezer compartment return air passage is formed in a lower portion of a deep surface of the freezer compartment and has a widthwise dimension larger than an outlet of the freezer compartment return air passage . A storage room at least divided into a refrigerating room and a freezing room,
A cooler for cooling the air supplied to the storage chamber via a supply air passage,
A cooling chamber in which the cooler is disposed,
A refrigerating compartment return air passage that connects the refrigerating compartment and the cooling compartment and causes air from the refrigerating compartment to flow into the cooling compartment,
A freezing compartment return air passage that connects the freezing compartment and the cooling compartment to allow air from the freezing compartment to flow to the cooling compartment,
An outlet of the refrigerating compartment return air passage is formed near one side surface of the cooling compartment,
The outlet of the freezer compartment return air passage is formed on the front surface side of the cooling chamber, has a widthwise dimension smaller than the width of the cooler, and is closer to the other side surface than the one side surface and the opposite side surface thereof. Formed ,
The refrigerator characterized in that a wall portion that closes the freezer return air passage is formed on the one side surface side with respect to the outlet of the freezer return air passage . The refrigerator according to claim 1 , wherein a wall portion that closes the freezer return air passage is formed on the one side surface side with respect to the outlet of the freezer return air passage. The cooling chamber is formed on the back side of the freezing chamber,
The freezer compartment return air passage is formed by a partition member that partitions the freezer compartment and the cooling room and a front cover that is assembled in front of the partition member. Refrigerator described in. The cooler has a refrigerant pipe and fins provided on an outer surface thereof,
The refrigerator according to any one of claims 1 to 4, wherein an interval between the fins on the one side surface side is larger than an interval between the fins on the other side surface side.

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