JP6741912B2 - refrigerator - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator, and more particularly to a refrigerator provided with a cooling chamber configured to suck in return cold air from a freezing chamber and a refrigerating chamber from front and side surfaces of a cooler.

Generally, a refrigerator includes a refrigerating room, a freezing room, a vegetable room, and the like, and supplies cold air generated in the cooling room at the back of the freezing room to the refrigerating room, the freezing room, the vegetable room, and the like to cool food in each room. Then, the cool air after cooling each chamber is sucked into the cooling chamber, cooled, and circulates to each chamber again.

At that time, the humidity in the cool air sucked into the cooling chamber condenses between the fins of the cooler provided in the cooling chamber, freezes and adheres as frost, and when the humidity is high, the gap between the fins of the cooler is Occasionally, frost may cause clogging, and the amount of air blown by the cooling fan may be extremely reduced, resulting in poor cooling performance. As a result, the cooling operation is prolonged and the energy saving is reduced.

In particular, the returned cool air from the refrigerating room has a higher temperature and higher humidity than the cool air from the freezing room, so that a lot of frost is generated and cooling performance is likely to be deteriorated, which has a great influence.

Therefore, the applicant has proposed a refrigerator in which bypass air passages are provided not only on the front side but also on the rear side of the cooler to suppress the deterioration of cooling performance due to frost adhesion (for example, refer to Patent Document 1).

FIG. 12 shows the refrigerator described in Patent Document 1 described above. This refrigerator has bypass air passages 103 and 104 in front of and behind a cooler 102 provided in a cooling chamber 101, and returns cold air from a freezing chamber 105. As indicated by the solid line arrow, the cooling air from the front of the cooler 102 is sucked between the fins, and the cool air returning from the refrigerating chamber 106 is drawn from the side surface of the cooler 102 to the lower side of the cooler as shown by the broken line arrow and then the bypass air passage 104. The air is sucked from between the fins on the rear surface of the lower end of the cooler 102 via the.

As a result, in this refrigerator, even if the moisture in the returned cool air from the freezer compartment 105 and the refrigerating compartment 106 becomes frost and adheres to the lower part of the cooler 102 and the lower part of the cooler 102 is clogged. Cold air flows to the upper part of the cooler 102 via the bypass air passages 103 and 104, and prevents an extreme decrease in cooling performance.

JP, 2005-1325, A

However, in the refrigerator described in Patent Document 1, for example, when many people gather at parties and the like that have recently increased, the number of times the refrigerating room door is opened and closed increases, and the outside air enters and the humidity becomes higher than expected. Is an inlet part where the cool air returned from the refrigerating chamber is sucked into the cooling chamber, and frost is deposited and accumulated between the inlet peripheral edge and the fin side surface of the cooler facing the inlet, causing the inlet itself to be clogged. In some cases, the flow of cold air was obstructed and the cooling performance deteriorated. That is, there is still room for improvement in prevention of cooling performance due to frost formation.

Since the number of opportunities for parties and the like has recently increased, the problem of deterioration in cooling performance due to frost adhesion at extremely high humidity is becoming apparent again.

The present invention has been made in view of such a newly emerging problem, and an object thereof is to provide a highly energy-saving refrigerator that further improves frost resistance and suppresses extreme cooling performance deterioration due to frost adhesion. It is a thing.

In order to achieve the above object, the present invention has a configuration in which a cooler return air passage is provided by eliminating the fin rear side of the cooler facing the opening of the side surface of the cooler room where the return cool air from the refrigerating room is sucked.

As a result, a fin-less cooler return air passage is formed on the rear side of the fin lower portion of the cooler facing the opening of the cooling chamber, and a large passage space is formed between the peripheral edge of the opening and the fin side surface. Therefore, it is possible to prevent frost from adhering to a clogging state. Therefore, the return cool air is surely introduced into the cooling chamber and sucked into the space between the fins of the cooler from the cooler return air passage, and even if the cool air returning to the cooling chamber has a considerably high humidity, the flow of cold air due to frost adhesion is obstructed. It is possible to prevent the above and suppress an extreme decrease in the cooling performance.

With the above-described configuration, the present invention can reliably suppress an extreme decrease in cooling performance due to frost adhesion, and can provide a highly energy-efficient refrigerator that requires a short operating time for cooling operation.

Front view of the refrigerator according to the first embodiment of the present invention Vertical sectional view of the refrigerator in the first embodiment Explanatory drawing which shows the cold air flow of the refrigerator in the same Embodiment 1. Exploded perspective view showing a cold air branching unit of the refrigerator in the first embodiment Sectional drawing which looked at the cooling chamber and the refrigerator compartment return duct of the refrigerator in the same Embodiment 1 from the front side. Sectional drawing which looked at the cooling chamber and the refrigerator compartment return duct of the refrigerator in the same Embodiment 1 from the upper surface. Sectional drawing which shows the principal part of the cooling chamber of the refrigerator in the same Embodiment 1. The perspective view which shows the refrigerating cold air return opening part to the cooling chamber of the refrigerator in the same Embodiment 1. The front view explaining the flow of the cool air to the refrigerator of the refrigerator in the same Embodiment 1. The perspective view which shows the edge part vicinity of the refrigerator of the refrigerator in the same Embodiment 1. (A) The perspective view of the cooler provided in the cooling chamber of the refrigerator in the same Embodiment 1, (b) The side view Sectional drawing of the cooling chamber which shows the cold air return structure of the conventional refrigerator

A first invention is a refrigerator main body having a refrigerating compartment and a freezing compartment, a cooling compartment provided with a cooler for generating cold air to be supplied to the refrigerating compartment and the freezing compartment, and cold air from the cooling compartment being the refrigerating compartment, A cooling fan that supplies the cooling air from the refrigerating chamber and the freezing chamber to the cooler in the cooling chamber while supplying the cooling air to the freezing chamber, and a refrigerating chamber cold air return duct that returns the returning cold air from the cooling chamber to the cooling chamber. A refrigerator having the refrigerating compartment cold air return duct provided at a side portion of the cooling chamber for sucking return cool air from the refrigerating compartment into a cooler through an opening on a side surface of the cooling chamber, wherein the opening on the side surface of the cooling chamber is provided. The rear side of the lower part of the fin of the facing cooler is eliminated to serve as a cooler return air path, and the cooler is configured by stacking a plurality of fin rows formed by arranging a number of fins in parallel in the upper and lower stages. Has a structure in which fins having different front and rear widths are arranged in parallel so that the fin pitch on the rear side is coarser than the fin pitch on the front side .

As a result, a fin-less cooler return air passage is provided on the rear side of the fin lower portion of the cooler facing the opening of the cooling chamber, and a large passage space is formed between the peripheral edge of the opening and the fin side surface. Therefore, even if frost adheres, it can be prevented from accumulating and becoming a clogging state. Therefore, the return cool air is surely introduced into the cooling chamber and sucked into the space between the fins of the cooler from the cooler return air passage, and even if the cool air returning to the cooling chamber has a considerably high humidity, the flow of cold air due to frost adherence is obstructed. It is possible to prevent the above and suppress an extreme decrease in the cooling performance. In addition, since the pitch between the fins on the rear side of the cooler, where the cool air returned from the refrigerating room with high temperature and high humidity is sucked in, the clogging is less likely to occur even if frost adheres, and the deterioration of cooling performance is suppressed more effectively. can do.

A second invention is a refrigerator main body having a refrigerating chamber and a freezing chamber, a cooling chamber provided with a cooler for generating cold air to be supplied to the refrigerating chamber and the freezing chamber, and cold air from the cooling chamber being the refrigerating chamber, A cooling fan that supplies the cooling air from the refrigerating chamber and the freezing chamber to the cooler in the cooling chamber while supplying the cooling air to the freezing chamber, and a refrigerating chamber cold air return duct that returns the returning cold air from the cooling chamber to the cooling chamber. A refrigerator having the refrigerating compartment cold air return duct provided at a side portion of the cooling chamber for sucking return cool air from the refrigerating compartment into a cooler through an opening on a side surface of the cooling chamber, wherein the opening on the side surface of the cooling chamber is provided. The fin lower rear side of the facing cooler is eliminated to form a cooler return air passage, and the cooler is configured to suck in the freezing return cold air from the freezing compartment from the lower front side thereof, and the cooler returning cold air is sucked in. the lower front of the fin pitch are a crude than the fin pitch of the upper.

As a result, the space between the lower front fins where frost is likely to adhere due to freezing return cold air is widened, and fin clogging due to frost adhesion can be reduced, and the amount of cold air returned to the cooling chamber is overwhelming compared to the amount of cold air returned from the refrigeration chamber. Even at most, it is possible to suppress clogging due to frost adhesion on the freezing return cold air side, and it is possible to effectively suppress deterioration of cooling performance.

A third aspect of the invention is the structure of the first or second aspect of the invention, in which the cooler return air passage is formed over the entire lateral width of the cooler.

As a result, the returned cool air from the refrigerating chamber diffuses into the cooler return air passage formed on the lower rear side of the cooler over the entire lateral width and is sucked into the upper part of the cooler. It enables efficient cooling that is utilized for, and improves energy efficiency.

In a fourth aspect based on the first to third aspects, the cooler has a configuration in which the fin pitch of the lower portion is coarser than the fin pitch of the upper portion.

As a result, since the fin pitch is wide in the lower part of the cooler, clogging is less likely to occur even if frost adheres between the fins, and a reduction in cooling performance can be effectively suppressed, and the heat exchange efficiency in the upper part of the cooler is improved. The cooling performance can be improved.

In a fifth aspect based on the first to fourth aspects, the cooler includes end plates at both left and right ends, and a seal/water receiving plate having a water collecting shape is provided between the end plates and a cooling chamber wall. Further, a water drainage hole is provided in a part of the end plate which is disposed and further faces the lowermost water collecting portion of the seal/water receiving plate.

Thereby, while suppressing the cool air that has returned to the cooling chamber from leaking between the end plate and the cooling chamber wall, defrosting water of frost generated by the cold air that has leaked slightly between the end plate and the cooling chamber wall. Can be received by the seal and water receiving plate and flow out to the fin side from the water draining hole of the end plate. Therefore, it is not necessary to provide a notch hole or the like for discharging defrosted water in the seal/water receiving plate, the sealability of the seal/water receiving plate against leakage of cold air is improved, and the end plate and the cooling chamber wall are It is possible to reduce the amount of cold air that leaks in the meantime, and to improve the cooling efficiency of the cooler accordingly.

In a sixth aspect based on the first to fifth aspects, the cooler has U-shaped pipe portions of a refrigerant pipe penetrating the fins arranged vertically, and the U protruding from the fin side surface of the refrigerant pipe. A refrigerant return pipe to the accumulator is arranged in a gap formed between the character tube portions.

As a result, the lateral width of the entire cooler including the refrigerant return pipe to the accumulator can be reduced, the lateral width of the fin row can be lengthened accordingly, and the cooling capacity of the cooler can be increased to improve the cooling efficiency.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to this embodiment.

(Embodiment 1)
1 to 11 are diagrams showing configurations of a refrigerator, a cooling chamber, and a cooler according to the first embodiment of the present invention.

1 to 11, the refrigerator according to the present embodiment includes a refrigerator main body 1 having an open front, and the refrigerator main body 1 includes a metal outer box 2, a hard resin inner box 3, and the outer box. A foam insulating material 4 such as urethane is foam-filled between the box 2 and the inner box 3.

Further, a plurality of storage chambers are formed by partition plates in the refrigerator main body 1, and each of the storage chambers is opened and closed by rotary type or drawer type doors 5 and 6 adopting the same heat insulating structure as the refrigerator main body 1. It is free.

The storage room formed in the refrigerator body 1 includes a refrigerating room 8 at the uppermost part, a switching room 9 under the refrigerating room 8 capable of switching temperature zones, and an ice making room 10 provided beside the switching room 9. And a freezing compartment 11 provided below the switching compartment 9 and the ice making compartment 10, and a vegetable compartment 12 further below the freezing compartment 11.

On the back surface of the freezing room 11, there is a cooling room 14 formed by partitioning the back surface of the freezing room partition plate 19 with a partition wall 20, and a cooler 15 for generating cold air and a cooling fan 16 for supplying the cold air to each room are provided. Further, below the cooler 15, a defrost heater 17, its cover 17a and a drain pan 17b are installed.

The cooler 15 constitutes a refrigeration cycle in which a compressor 18, a condenser (not shown), a heat radiation pipe (not shown) for heat radiation, and a capillary tube (not shown) are annularly connected. The cooling is performed by circulating the refrigerant compressed by the compressor 18.

The cold air generated by the cooling chamber 14 is supplied to the freezing chamber 11 and the ice making chamber 10 and the switching chamber 9 beside it via the freezing chamber damper 22, and the cooling chamber duct 23 and the cooling chamber duct 23 shown in FIG. It is supplied to the refrigerating compartment 8 and the vegetable compartment 12 through the vegetable compartment cold air going-out duct 24 branched from the middle of the above.

The refrigerating compartment duct 23 is formed upward from the cooling compartment 14 toward the refrigerating compartment 8 and penetrates the refrigerating compartment partition plate 25 that separates the refrigerating compartment 8 from the ice making compartment 10 and the switching compartment 9 beside the refrigerating compartment 8. The vegetable compartment cold air going-out duct 24 is branched at the penetrating portion of the refrigerating compartment partition plate 25 while being extended to the rear surface of the compartment 8. Further, the vegetable compartment cold air outgoing duct 24 is formed downward from the branch portion toward the vegetable compartment 12 and passes through a side portion of the cooling chamber 14 to form an opening 24a on the back surface of the vegetable compartment 12.

The refrigerating compartment duct 23 and the vegetable compartment cold air outgoing duct 24 are branched by a branching unit 26 shown in FIG. The branch unit 26 has a refrigerating compartment duct portion 27, a vegetable compartment cold air advancing duct portion 28, and a refrigerating compartment cold air returning duct portion 29, and a vegetable compartment damper 30 is incorporated in the vegetable compartment cold air advancing duct portion 28 and above it. A lid 31 is attached to the vegetable compartment, and the duct for cold air going to the vegetable compartment is closed to form a unit.

The branching unit 26 in the unitized state is sandwiched between the lower plate 32 and the upper plate 33 of the refrigerating compartment partition plate 25, and is filled with foamed heat insulating material between the lower plate 32 and the upper plate 33 for refrigeration. It is integrated with the rear part of the chamber partition plate 25.

The refrigerating compartment duct part 27 provided in the branching unit 26 is connected to the refrigerating compartment duct 23 on the rear side of the refrigerating compartment via the refrigerating compartment damper 34 at the upper end opening portion thereof, and the cold air generated in the cooling compartment 14 is refrigerating compartment. It is supplied from the refrigerator compartment duct 23 to the refrigerator compartment 8 via the damper 34.

Further, the vegetable compartment cold air advancing duct portion 28 provided in the branch unit 26 is connected to the downward vegetable compartment cold air advancing duct 24 shown in FIG. 3, and the cold air generated in the cooling chamber 14 is an upward portion of the refrigerating compartment duct 23. It is branched from and is supplied to the vegetable compartment 12 through the vegetable compartment damper 30 from the lower portion of the downward vegetable compartment cool air going duct 24.

Further, the refrigerating compartment cold air return duct portion 29 provided in the branch unit 26 is a side portion of the refrigerating compartment cold air returning duct 35 shown in FIG. The cold air after cooling the food in the refrigerating compartment 8 is sucked into the cooling compartment 14 through the refrigerating compartment cold air return duct 35 and circulates.

Here, as shown in FIG. 6, the refrigerating compartment cold air returning duct 35 has a flat shape and is provided on the rear side portion of the vegetable compartment cold air advancing duct 24 and on the side portion of the cooling chamber 14 as described above. ..

The refrigerating compartment cold air return duct 35 is connected to an opening 36 serving as a return cold air inlet on the side surface of the cooling chamber 14, as shown in FIGS.

Further, as shown in FIG. 11, the cooler 15 provided in the cooling chamber 14 has fin rows 38, which are formed by arranging a large number of strip-shaped fins 37, arranged in a plurality of upper and lower stages, and each fin row 38 is arranged. End plates 39 are arranged on both left and right sides of the end plate 39, and a refrigerant pipe 40 is formed through the end plate 39 and each fin array 38 so that the upper and lower fin arrays 38 are connected by the end plate 39.

The fin row 38 at each stage is configured by arranging fins 37a and 37b having different front and rear widths at a predetermined ratio, and the fin pitch on the rear side where the refrigerated cold air is sucked becomes coarser than the fin pitch on the front side. Is done.

Further, the fins 37 of the fin row 38 in the lowermost stage are only the fins 37b having a narrow front-rear width, and the rear side of the lowermost stage of the cooler 15 has a finless cooler return air passage 41 over the entire lateral width. Further, the rear side of the lowermost end of the end plate 39 corresponding to the cooler return air passage 41 is also cut out to form the cooler return air passage 41.

As a result, the portion facing the opening 36 serving as the inlet for the refrigerating room cool air from the refrigerating room cold air return duct 35 provided on the side surface of the cooling room 14 is opposed to the cooler return air passage 41 and is wide open. It is in the state of having done.

Further, the fin row 38 of each stage of the cooler 15 has a coarser fin pitch from the fin row 38 of the upper stage to the fin row 38 of the lower stage.

On the other hand, the cooler 15 is constructed so as to suck in the freezing return cold air from the freezing chamber 11 from the front side of the lowermost stage, and the portion of the cooling chamber 14 corresponding to the front side of the lowermost stage of the cooler is provided with an inlet for the freezing return cold air. A freezing/cooling air opening 43 (see FIG. 7) is formed. The fin pitch of the lowermost fin row of the cooler 15 facing the freezing/cooling air opening 43 is coarser than the fin pitch of the fin rows above it.

Further, in the cooler 15, as shown in FIG. 11, the U-shaped pipe portions 40a of the refrigerant pipe 40 are arranged in the same vertical direction as the flow of the cool air, and the U-shaped portions protrude from the fin side surface of the refrigerant pipe 40. A refrigerant return pipe 40b which returns to the accumulator 44 through a vertical gap formed between the pipe portions 40a is provided. A holder plate 45 is arranged on the upper end plate 39 as shown in FIG. 5, and the holder plate 45 is fixed to the cooling chamber wall 14a with some play and is cut into the holder plate 45. A notch (not shown) is provided, and the refrigerant return pipe 40b is caulked and fixed to the notch.

Further, as shown in FIGS. 5, 9, and 10, the cooler 15 has seal and water receiving plates 46 attached to the lower left and right sides of the end plate 39. The seal/water receiving plate 46 is located between the end plate 39 and the cooling chamber wall 14a so as to close the space therebetween, and is a gutter shape for collecting defrosting water dropped during defrosting. It has a water collecting shape. A water drainage hole 47 is provided in a part of the end plate 39 facing the lowermost water collecting portion of the seal/water receiving plate 46.

Regarding the refrigerator according to the present embodiment configured as described above, the operation and effect thereof will be described next focusing on the flow of cold air.

When any of the refrigerating compartment 8, the freezing compartment 11 and the vegetable compartment 12 becomes higher than the set temperature due to the taking in and out of food or the like, the compressor 18 and the cooling fan 16 are operated, and the cold air generated by the cooler 15 is cooled by the cooling fan 16 As a result, the gas is supplied to the corresponding storage room via the refrigerating room duct 23, the freezing room damper 22, and the vegetable room cold air going duct 24.

If the storage room having a temperature equal to or higher than the set temperature is, for example, the refrigerating room 8, the refrigerating room damper 34 is opened, and the cold air from the cooling room 14 is supplied to the refrigerating room 8 through the refrigerating room duct 23, and the refrigerating room 8 After being cooled, the cooling air is sucked into the cooling chamber 14 via the cold air returning duct 35, cooled again by the cooler 15 and supplied to the cooling chamber 8 to repeat the circulation to perform cooling.

Here, the return cool air sucked from the refrigerating compartment cool air return duct 35 into the cooling chamber 14 is passed through the opening 36 provided on the side surface of the cooling chamber 14 as shown by the solid line arrow in FIG. 5 (broken line arrow in FIG. 7). Although it is sucked into the cooling chamber 14, since the temperature of the cooling chamber 14 is extremely lower than about -30°C and about 4°C of the cold air returned to the cold storage, it starts to adhere to the opening edge portion of the opening 36 as frost. Then, in the conventional refrigerator, as described above, the frost attached to the opening edge portion is accumulated and comes into contact with the fin side surface of the cooler facing the opening to close the opening.

However, in this refrigerator, the fins 37 at the lower end of the cooler 15 facing the opening 36 on the side surface of the cooling chamber 14 do not have a rear side thereof and serve as the cooler return air passage 41. A large opening is formed between the opening edge portion and the fin 37 facing the opening edge portion. Therefore, it is possible to prevent the frost adhering to the opening edge portion from accumulating on the fin side surface and clogging the opening 36, and it is possible to prevent the cooling performance from being extremely lowered.

Further, since the cooler return air passage 41 on the rear side of the lowermost stage of the cooler 15 is formed over the entire lateral width of the cooler 15, the refrigerating return cold air from the opening 36 flows to the cooler return air passage 41. It flows, diffuses, disperses over the entire width of the cooler 15, and is sucked into the upper part of the cooler 15. Therefore, the heat exchange efficiency in the cooler 15 is improved, and efficient cooling can be achieved by effectively utilizing the entire cooler.

The fins 37 of the cooler 15 are arranged with fins 37a and 37b having different front and rear widths so that the fin pitch on the rear side is coarser than the fin pitch on the front side. Even if frost adheres to the rear side of the fin 37, the space between the fins in that portion is wide, so that clogging is less likely to occur. Therefore, also from this point, it is possible to suppress the deterioration of the cooling performance.

Further, the cooler 15 is configured by stacking a plurality of fin rows 38 in the vertical direction, and the fin pitch of the lower step portion is made coarser than the fin pitch of the upper step portion so that the fins are wider, so that the freezer compartment 11 and the refrigerating room are cooled. It is possible to suppress the clogging between the fins in the lower part of the cooler, which is likely to come into contact with the moisture in the cool air returned from the chamber 8 and to be frosted first. As a result, the deterioration of the cooling performance can be further suppressed, and the heat exchange rate is increased in the upper part of the cooler between the fins, so that the cooling performance can be further improved.

Further, the cooler 15 sucks the frozen return cold air of the freezing chamber 11 through the freezing/cooling air opening 43 provided at the lowermost front side thereof, and the fin pitch on the lowermost front side of the cooler 15 sucking the frozen return cold air is Since it is coarser than the fin pitch above it, it is possible to favorably prevent the deterioration of the cooling performance due to the adhesion of frost on the freezing return cold air side.

That is, since frost is likely to adhere to the fin row 38 on the front side of the lowermost stage of the cooler 15 where the freezing return cold air returning from the freezer compartment 11 first touches, the fin pitch of the fin row 38 on the front side of the lowermost stage. Is rough and the space between the fins is wide, so even if frost adheres to the fins, it will be less likely to be clogged. Therefore, it is possible to effectively prevent clogging of the frozen return cold air, which is overwhelmingly larger than the refrigerated return cold air, due to frost adhesion, although the amount of moisture contained is small, and it is possible to more reliably suppress deterioration of the cooling performance.

Further, in the cooler 15, the fin row 38 is arranged in a plurality of upper and lower stages, and each fin row 38 is configured by arranging fins 37a and 37b having different front and rear widths at a predetermined ratio. Of the cooler return air passage 41, the rear fin pitch into which refrigeration return cold air is sucked is made coarser than the front fin pitch, and the fin pitch at the lower part of the cooler is made coarser than that at the upper part. And the like can be easily formed by two kinds of fins having different front and rear widths. Therefore, it can be provided with high productivity and at low cost.

On the other hand, a part of the cool air sucked into the cooling chamber 14 from the refrigerating chamber 8 and the like flows between the end plate 39 of the cooler 15 and the cooling chamber wall 14a as shown by an arrow A in FIG. However, in this embodiment, since the seal and water receiving plate 46 is arranged between the end plate 39 and the cooling chamber wall 14a, the space between the end plate 39 and the cooling chamber wall 14a is arranged. It is possible to suppress the inflow into the fin plate 38 side of the end plate 39 as shown by an arrow B. Therefore, most of the cool air sucked into the cooling chamber 14 passes between the fins of the cooler 15, so that the cooling performance can be improved, and the cool air leaks between the end plate 39 and the cooling chamber wall 14a. It is also possible to reduce frost adhesion due to the cold air.

Further, the seal/water receiving plate 46 has a gutter-shaped water collecting shape, and the drainage hole 47 is formed in a part of the end plate 39 facing the lowest part of the water collecting. 39. The defrosting water of frost generated by the leakage of cold air between the cooling chamber wall 14a and the cooling chamber wall 14a is received by the seal/water receiving plate 46 and is made to flow from the water draining hole 47 of the end plate 39 to the fin side of the cooler 15. be able to. Therefore, it is not necessary to provide a notch hole or the like for discharging defrost water in the seal/water receiving plate 46, and by providing the notch hole or the like, leakage occurs between the end plate 39 and the cooling chamber wall 14a. It is possible to suppress deterioration of the sealability of cold air, and to improve the cooling efficiency of the cooler accordingly.

Further, in the cooler 15, the U-shaped pipe portions 40a of the refrigerant pipe 40 are arranged in the vertical direction, and the refrigerant return pipe 40b to the accumulator 44 is piped in the gap formed between the U-shaped pipe portions 40a. The overall width of the cooler 15 including the refrigerant return pipe 40b to the accumulator 44 can be reduced, and the width of the fin row 38 can be increased correspondingly to increase the cooling capacity of the cooler 15 and improve the cooling efficiency. it can.

That is, in the conventional cooler, since the U-shaped pipe portion of the refrigerant pipe is inclined and the refrigerant return pipe cannot be passed between the U-shaped pipe portions, the refrigerant is placed outside the protruding tip of the U-shaped pipe portion. Although the return pipe is laid and the width of the heater is increased by that amount, the width of the fin row is conversely short.However, according to the cooler configuration of the present embodiment, the refrigerant return is as described above. Since the pipe 40b can be provided within the protruding size of the U-shaped pipe portion 40a, the lateral length of the fin row 38 can be increased and the cooling capacity of the cooler 15 can be increased.

Moreover, the refrigerant return pipe 40b is fixed to the holder plate 45 fixed to the cooling chamber wall 14a by caulking, so that the refrigerant return pipe 40b is prevented from swaying left and right and colliding with the U-shaped pipe portion 40b. Therefore, it is possible to prevent the noise generation due to the collision between the refrigerant return pipe 40b and the U-shaped pipe portion 40a, which is a concern due to the increased cooling capacity of the cooler 15.

Further, in the present embodiment, since the refrigerating compartment cold air returning duct 35 is arranged on the side of the cooling chamber 14 and on the back side of the vegetable compartment cold air advancing duct 24, the vegetable compartment cold air advancing duct 24 and the refrigerating compartment cold air are arranged. By making the return duct 35 flat, the front-rear width of the refrigerator main body 1 can be reduced while securing the flow rate. In other words, the internal volume can be increased without increasing the front-rear width of the refrigerator body 1.

Although the refrigerator according to the present invention has been described above using the above-described embodiment, the present invention is not limited to this. That is, the embodiments disclosed this time are to be considered as illustrative in all points and not restrictive. In other words, the scope of the present invention is shown not by the above description but by the scope of the claims, and is intended to include meanings equivalent to the scope of the claims and all modifications within the scope.

For example, in the above-described embodiment, the cooler 15 is configured by arranging the fin rows 38, which is configured by arranging two kinds of strip-shaped fins having different front and rear widths, in a plurality of upper and lower stages. It is also possible to use this, and in this case, a notch may be provided on the rear side of the lower portion of the fin to form the cooler return air passage 41.

INDUSTRIAL APPLICABILITY The present invention can surely suppress an extreme decrease in cooling performance due to frost adhesion at an inlet portion of refrigerated return cold air, and can provide a highly energy-saving refrigerator that requires a short operation time for cooling operation. Therefore, it can be widely applied to refrigerators of various types and sizes such as household and commercial use.

1 Refrigerator Main Body 4 Foam Insulating Material 5, 6 Door 8 Refrigerator Room 9 Switching Room 10 Ice Making Room 11 Freezer Room 12 Vegetable Room 14 Cooling Room 15 Cooler 16 Cooling Fan 17 Defrost Heater 18 Compressor 19 Freezing Room Partition Plate 20 Partition Wall 23 Cold room duct 24 Vegetable room cold air passage duct 25 Cold room partition plate 26 Branch unit 27 Cold room duct part 28 Vegetable room cold air going duct part 29 Cold room cold air return duct part 30 Vegetable room damper 31 Lid 34 Cold room damper 35 Cold room Cold air return duct (Cold air return duct)
36 Opening 37, 37a, 37b Fin 38 Fin row 39 End plate 40 Refrigerant pipe 41 Cooler return air passage 43 Refrigerating/cooling air opening 44 Accumulator 45 Holder plate 46 Seal and water receiving plate 47 Drain hole

Claims (6)

A refrigerator main body having a refrigerating compartment and a freezing compartment, a cooling compartment provided with a cooler for generating cold air to be supplied to the refrigerating compartment and the freezing compartment, and cold air from the cooling compartment is supplied to the refrigerating compartment and the freezing compartment. Together with the refrigerating room, a cooling fan for sucking the return cold air from the freezing room into the cooler in the cooling chamber, and a refrigerating room cold air return duct for returning the return cold air from the refrigerating room to the cooling chamber, the refrigerating machine A refrigerator in which a room cool air return duct is provided in a side portion of the cooling chamber to suck return cool air from the refrigerating chamber into a cooler through an opening on a side surface of the cooling chamber, the refrigerator facing the opening on the side surface of the cooling chamber. The rear side of the fin lower part is eliminated to serve as a cooler return air passage, and the cooler is configured by stacking a plurality of fin rows formed by arranging a number of fins in parallel, and the fins of the fin row have fins having different front and rear widths. Refrigerator in which the fin pitches on the rear side are coarser than the fin pitches on the front side . A refrigerator main body having a refrigerating compartment and a freezing compartment, a cooling compartment provided with a cooler for generating cold air to be supplied to the refrigerating compartment and the freezing compartment, and cold air from the cooling compartment is supplied to the refrigerating compartment and the freezing compartment. Together with the refrigerating room, a cooling fan for sucking the return cold air from the freezing room into the cooler in the cooling chamber, and a refrigerating room cold air return duct for returning the return cold air from the refrigerating room to the cooling chamber, the refrigerating machine A refrigerator in which a room cool air return duct is provided in a side portion of the cooling chamber to suck return cool air from the refrigerating chamber into a cooler through an opening on a side surface of the cooling chamber, the refrigerator facing the opening on the side surface of the cooling chamber. The fin lower rear side is eliminated to serve as a cooler return air passage, and the cooler is configured to suck the freezing return cold air from the freezing chamber from the lower front side thereof, and the fin pitch on the lower front side of the cooler into which the freezing return cold air is sucked Is a refrigerator that is coarser than the fin pitch above it . The refrigerator according to claim 1 or 2, wherein the cooler return air passage is formed over the entire width of the cooler. The refrigerator according to any one of claims 1 to 3, wherein the lower fin pitch of the cooler is coarser than that of the upper fin pitch. The cooler is provided with end plates at both left and right ends, and a seal and water receiving plate having a water collecting shape is arranged between the end plate and the cooling chamber wall. The refrigerator according to any one of claims 1 to 4, wherein water drainage holes are provided in a part of the end plates whose lower portions face each other. In the cooler, U-shaped pipe portions of a refrigerant pipe penetrating the fins are arranged in a vertical direction, and a refrigerant return pipe to an accumulator is provided in a gap formed between the U-shaped pipe portions protruding from the fin side surface of the refrigerant pipe. The refrigerator according to any one of claims 1 to 5, which is provided with a pipe.