JP3583910B2 - refrigerator - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a refrigerator in which a cooler and a blower are installed in an insulated box, and cool air cooled by the cooler is circulated in a refrigerator by a blower.
[0002]
[Prior art]
Conventionally, this type of refrigerator has a freezing room and a refrigerating room in an insulated box body as shown in, for example, Japanese Utility Model Publication No. 6-12301 (F25D23 / 00), and a cooling room defined in the back of the freezing room. A cooler and a blower are installed in the refrigerator, and the cool air cooled by the cooler is supplied to each of the chambers by the blower and circulated to cool the room.
[0003]
Further, this type of cooler is composed of fins made of a plurality of aluminum thin plates arranged at predetermined intervals and a refrigerant pipe penetrating each fin. It is transmitted to each fin. Then, air is blown between the fins by a blower. At that time, the air is brought into contact with the fins (and the refrigerant pipes) to generate heat exchange, thereby generating cool air.
[0004]
[Problems to be solved by the invention]
However, especially the cool air circulating in the refrigerator compartment and returning to the cooler contains a large amount of moisture, and this moisture becomes frost in the process of exchanging heat with the cooler and forms on the surfaces of the fins and refrigerant pipes. Adhere to. When such frost grows, the ventilation resistance in the cooler increases, and the flow rate of cool air decreases sharply. In the worst case, the entire cooler may be blocked by frost. In addition, since the frost itself exerts an insulating effect between the fins and the cool air, the heat exchange efficiency between the cooler and the flowing cool air is significantly reduced, and thus cooling at the freezing temperature is particularly necessary. There has been a problem that the temperature of the freezing room rises abnormally.
[0005]
Therefore, in this type of refrigerator, the cooler is periodically heated by an electric heater or the like to perform defrosting, but the adverse effect of frost until the start of defrosting is inevitable. How to prevent a decrease in the cooling capacity of the freezer compartment due to the growth of frost has been an issue of this kind of refrigerator.
[0006]
The present invention has been made to solve such a conventional technical problem, and it is an object of the present invention to provide a refrigerator in which a decrease in cooling capacity in a refrigerator due to frost formation of a cooler is prevented.
[0007]
[Means for Solving the Problems]
Refrigerator of the present invention, cooling with defining a freezing compartment and refrigerating compartment in the heat-insulating main body, established a cooler and a blower to a cooling chamber which is constituted in the heat insulating box body, at the cold air cooled by the cooler fan The cooler is circulated in the freezing chamber and the refrigerator compartment, and the cooler is composed of a plurality of fins arranged at predetermined intervals and a refrigerant pipe penetrating each fin, and an end portion on a cold air inflow side. A region where the fin density is low is formed in a portion on the downstream side, and suction cold air from the freezing room flows into the region, and suction cold air from the refrigerator room flows into the end of the cold air inflow side. is there.
[0008]
According to the present invention, a freezer compartment and a refrigerator compartment are formed in the heat insulating box, and a cooler and a blower are installed in the cooling chamber formed in the heat insulating box, and the cool air cooled by the cooler is frozen by the blower. In a refrigerator circulating in a room and a refrigerator , a cooler is composed of a plurality of fins arranged at predetermined intervals and a refrigerant pipe penetrating each fin, and is located downstream from an end on a cold air inflow side. A fin-density region was formed in the portion on the side, and the cold air sucked in from the freezer room was allowed to flow into the region, and the cold air sucked from the cold room was allowed to flow into the end of the cold air inflow side . Even if the end on the cold air inflow side is blocked by the growth of frost due to the cold air sucked from the humid cold room, the cold air sucked from the freezer room can flow into a region with low fin density downstream.
[0009]
Therefore, it is possible to suppress or prevent the cold air from flowing into the freezing chamber from being hindered by the frost at the cool air inflow side end of the cooler , and particularly to maintain the cooling capacity of the freezing chamber cooled at the freezing temperature in a favorable state. Will be able to do it.
[0010]
In the refrigerator according to the second aspect of the present invention, a region having a low fin density is formed corresponding to the upstream side of the blower, and the fin density downstream of the region is high.
[0011]
According to the invention of claim 2, in addition to the above, a region having a low fin density is formed corresponding to the upstream side of the blower, and the fin density on the downstream side of the region is made high. effectively to be able to be utilized to cool the freezing chamber in which it is possible to further contribute to the improvement of the cooling effect of the refrigerating chamber.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of the present invention will be described in detail with reference to the drawings. 1 is a front view of the refrigerator of the present invention, FIG. 2 is a front view of the refrigerator without the heat-insulating door, FIG. 3 is a front view of the refrigerator without the heat-insulating door from which containers and the like are removed, and FIG. FIG. 5 is another longitudinal side view of the refrigerator, and FIG. 6 is still another longitudinal side view of the refrigerator.
[0013]
The refrigerator 1 includes an outer box 2 made of a steel plate and an inner box 3 made of a hard resin such as ABS filled with a heat insulating material 4 such as polyurethane foam by an in-situ foaming method. ing. The interior of the heat-insulating box 6 is divided into upper and lower four chambers by an upper partition wall 8, a middle partition wall 7, and a lower partition wall 9, and the upper part of the upper partition wall 8 is refrigerated room 11 and the lower partition wall 9. The lower part is a vegetable room 12, the space between the upper partition 8 and the middle partition 7 is an ice temperature room 10, and the space between the middle partition 7 and the lower partition 9 is a freezing room 13. A pre-partitioning member 15 is attached to an opening edge in the middle between the middle partition wall 7 and the lower partition wall 9.
[0014]
The front opening of the refrigerator compartment 11 is openably and closably closed by a double door type heat insulating door 14, and the freezer compartment 13 and the vegetable compartment 12 are of a drawer type provided with containers 16 A, 17 A and 18 A having top openings. Insulated doors 16, 17 (the freezer compartment 13 has these two upper and lower stages) and 18 are openably closed, respectively. The ice temperature chamber 10 is also closed by a drawer-type heat-insulating door 19 provided with a container 19A having an upper surface opening.
[0015]
In the upper left corner of the freezer compartment 13, an automatic ice maker 21 is installed. Further, the interior of the freezer compartment 13 is partitioned forward and backward by a partition plate 22 and a cooler front plate 23, and a cooling chamber 24 is defined behind the cooler front plate 23. A cooler 26 is provided vertically. A blower 29 is provided above the center of the cooler 26, and a defrost heater 31 is provided below the cooler 26.
[0016]
A plurality of freezer compartment discharge ports 13A,... Are formed in the upper part and the central part of the partition plate 22, and the freezer compartment suction ports 13B, 13B are provided on the lower left and right sides of the partition plate 22, respectively. The freezer compartment suction ports 13C, 13C are formed adjacent to each other also in the lower central part.
[0017]
On the other hand, the cooler front plate 23 is provided behind the partition plate 22 at a small interval, and a grill 23A facing the fan 32 of the blower 29 is formed above the cooler front plate 23. The space between the partition plate 22 on the front side of the fan 32 and the cooler front plate 23 communicates with the freezing compartments 13A. Further, an opening 23B is formed in the lower central portion of the cooler front plate 23, and communicates with the freezing chamber suction ports 13C, 13C and the inside of the cooling chamber 24. Further, the freezing compartment suction ports 13B, 13B communicate with the lowermost part of the cooling chamber 24 via the lower end of the cooler front plate 23.
[0018]
Here, a plurality of the coolers 26 are provided at predetermined intervals as shown in FIGS. 11 to 13, and the fins 27 are made of an aluminum thin plate extending vertically and these fins 27. This is a so-called plate fin type heat exchanger composed of a refrigerant pipe 28 penetrating through the fin. The fin density (pitch) at the lower end of the cooler 26 is low, and the fin density at the left, right, front and rear excluding the center is also low It is sparse.
[0019]
That is, the vertical dimension of each fin 27... Is such that two or three fins 27 are consecutively short, the left and right fins 27 sandwiching them are long, and the short fin 27 is centrally located. The vertical dimension is shorter every other sheet. Also, the front and rear widths of the fins 27... Located on the left and right are configured to be narrow every other sheet.
[0020]
As a result, a region 26A having a low fin density is formed at the lower edge of the cooler 26, and a region 26B having a low fin density is continuously formed at the center from the region 26A and extends slightly below the upper and lower central portions. Further, regions 26C... Of low fin density are also formed at the left and right front and rear edges (outside portions of the cooler 26 where the edges of the fins 27 extending in the vertical direction through which the cool air flows). The area 26B corresponds to a position below the blower 29, and the opening 23B corresponds to a front side of the area 26B (FIG. 8).
[0021]
A guide duct 39 is formed above the blower 29 so as to vertically penetrate a rear portion of the molded heat insulating material 38 inserted into the partition wall 7, and a lower portion of the guide duct 39 is provided in a space in front of the fan 32. A branch duct 42 formed in the molded heat insulating material 41 is connected to the upper portion thereof. The branch duct 42 passes through a motor damper 46 having a refrigerator compartment baffle 43 and an ice temperature compartment baffle 44, one of which is connected to a refrigerator compartment rear duct 47 and the other of which is connected to an ice compartment compartment 48. The baffle 43 for the refrigerator compartment is located at the entrance of the duct 47 on the back of the refrigerator compartment, and the baffle 44 for the ice compartment is located at the entrance of the duct 48 for the ice compartment.
[0022]
A rear duct plate 49 is attached to the back of the refrigerator compartment 11 at a distance from the rear of the inner box 3, and the refrigerator rear duct 47 extending vertically between the rear duct plate 49 and the inner box 3. Is formed. On the front surface of the rear duct plate 49, a refrigerator outlet 11A is formed. Further, a plurality of shelves 51 are provided in the refrigerator compartment 11. Further, at the lower right corner of the rear duct plate 49 on the back of the refrigerator compartment 11, a rear refrigerator compartment suction port 61 is formed, and the rear refrigerator compartment suction port 61 is formed on the rear side of the rear plate 62 of the ice warm room 10. It communicates with the upper part of the return duct 63 formed on the side of the members 38 and 41.
[0023]
Further, a water supply tank 52 for supplying water to the automatic ice maker 21 is accommodated in a lower left corner of the refrigerator compartment 11. As shown in FIGS. 17 to 19, the water supply tank 52 has a tank body 53 which is long and narrow and opens on the upper surface, a cover 54 for closing the upper surface opening of the tank body 53, and a lid member 56 attached to the cover 54. It is composed of
[0024]
In this case, a rectangular recess 54A is formed at the front of the cover 54, and a rectangular injection port 57 is also formed at the bottom of the recess 54A. The lid member 56 pivotally supports the hinge portions 56A, 56A on both sides of the rear edge of the cover 54 at the rear of the inlet 57 so as to close and close the inlet 57 in an openable and closable manner.
[0025]
The lid member 56 has a concave shape along the inner surface shape of the concave portion 54A, whereby the lid member 56 is configured so that a finger can be sufficiently applied thereto. At the rear of the cover 54, a water-absorbing cylinder 54B descends into the tank body 53, and the water-absorbing cylinder 54B communicates with a connecting portion 54C that opens rearward at the rear end of the cover 54.
[0026]
When the water supply tank 52 is installed, the water supply tank 52 is inserted into the refrigerator compartment 11 from the front, and the connection portion 54C is detachably connected to a water supply pipe 59 provided at the back. The water supply pipe 59 communicates with the automatic ice making machine 21. Water in the tank main body 53 is sucked up from the water absorption cylinder 54B and supplied to the automatic ice making machine 21 through the connecting part 54C and the water supply pipe 59, where the ice is made. Driving is performed. The generated ice is stored in the freezer 13.
[0027]
When the water in the tank main body 53 is exhausted due to the ice making operation, the water supply tank 52 is pulled out from the refrigerator compartment 11. In this case, fingers are inserted into the recessed lid member 56 to be hooked. , The water supply tank 52 can be easily pulled out.
[0028]
Then, the lid member 56 is pivoted upward from the near side to open the injection port 57 and replenish the water into the tank body 53. In this case, too, the lid member 56 can be easily opened and closed. Work is also easy. After replenishment, the lid member 56 is closed and carried. In this case, since the lid member 56 is located along the inner surface of the concave portion 54A of the cover 54 and closes the inlet 57 ( 19), it is possible to prevent water from leaking from the injection port 57 due to shaking during transportation or the like.
[0029]
On the other hand, the upper partition wall 8 is composed of an upper plate 66 and a lower plate 67 made of a hard resin and a molded heat insulating material 68 provided along the lower surface of the upper plate 66 as shown in FIGS. The ice greenhouse duct 48 is formed between the molded heat insulating material 68 and the lower plate 67. The ice greenhouse duct 48 is configured so as to expand forward from a rear entrance 48A by a blind lane-shaped partition wall 69 erected on the upper surface of the lower plate 67, and is connected to the lower plate 67 located in the middle and front thereof. Are formed with a plurality of discharge ports 71...
[0030]
In addition, partitions 72 to 74 are provided upright on a lower plate 67 in front of and on the right side of the partition 69, whereby two refrigerating compartment suction ducts 77 are provided in the upper partition wall 8 outside the ice greenhouse duct 48. , 78 are arranged side by side. The front of the upper plate 66 is formed with left and right refrigerator compartment suction ports 79 and 81 at the left and right, and the left refrigerator compartment front suction port 79 is provided at the inlet 77A of the left refrigerator compartment suction duct 77, The right refrigerator compartment suction port 81 communicates with the inlet portion 78A of the right refrigerator compartment suction duct 78, respectively. The rear end of each refrigerator compartment suction duct 77, 78 communicates with the return duct 63.
[0031]
In this case, the passage cross-sectional area of the left refrigerator compartment suction duct 77 is formed larger than the passage cross-sectional area of the right refrigerator compartment suction duct 78, and the suction portion 77A is also expanded beyond the suction portion 78A (FIG. 15). ). Here, since each of the refrigerator compartment suction ducts 77 and 78 is formed so as to detour from the front side of the ice greenhouse duct 48 to the right side, the passage length of the left refrigerator compartment suction duct 77 is equal to that of the right refrigerator compartment suction duct 78. It is longer than long.
[0032]
A narrow communication passage 83 is formed between the partition wall 72 and the partition wall 69, and the communication passage 83 connects the front end of the ice temperature chamber duct 48 and the suction portion 77 </ b> A of the refrigerator compartment suction duct 77. An ice greenhouse suction port 84 is formed on the right side of the back plate 62 of the ice greenhouse 10 and communicates with the return duct 63.
[0033]
On the other hand, the upper end of the vegetable compartment duct member 86 is connected to the right portion of the molded heat insulating material 38, and descends downward on the right side of the cooling room 24, thereby forming a vegetable compartment duct 87 inside. The upper end of the vegetable compartment duct 87 communicates with the return duct 63, and the lower end is opened at a vegetable compartment discharge port 88 at the upper right rear of the vegetable compartment 12.
[0034]
A vegetable compartment suction duct 91 is formed in the lower partition wall 9, and the vegetable compartment suction duct 91 opens at a vegetable compartment suction port 92 opened on the upper surface at the back of the vegetable compartment 12, and the cooling chamber 24. Is communicated with the lower end portion.
[0035]
As shown in FIG. 16, the pre-partitioning member 15 includes a main body 93 made of hard resin, a molded heat insulating material 94 provided in the main body 93, a front plate 96 made of a steel plate, and a dew-prevention attached to the back surface thereof. The lower wall of the main body 93 has a shape in which the front part 93A is low and the rear part 93B is stepwise high.
[0036]
At the rear end of the front portion 93A, an engagement portion 93C that projects rearward with a space below the rear portion 93B is integrally formed at a position slightly above the lower surface thereof. The base portion 98A of the seal member 98 is attached to the engaging portion 93C by engaging from behind, and the soft fin piece 98B projects forward and downward.
[0037]
The soft fin piece 98B of the sealing member 98 is to be tightly sealed to the rear surface of the front edge of the container 17A in a state where the heat insulating door 17 is closed. In this case, the lower surface of the base 98A of the sealing member 98 is The lower surface of the front portion 93A is substantially flush with the lower surface of the front portion 93A. That is, since the base portion 98A of the seal member 98 or its mounting portion (formed on the pre-partitioning member 15) does not protrude downward, the container 17A does not get caught, and the vertical dimension of the container 17A is enlarged accordingly. Thus, the effective volume can be expanded.
[0038]
Note that such a structure is similarly formed on the other partition walls 7, 8, and 9. Reference numeral 104 denotes a refrigerator compartment temperature sensor for detecting the temperature in the refrigerator compartment 11, which is attached to the rear duct plate 49, reference numeral 106 denotes an ice temperature compartment temperature sensor for detecting the temperature in the ice compartment 10, and the lower plate 67 Installed.
[0039]
Further, a machine room 99 is formed at a lower portion of the heat insulating box 6, and a compressor 101, a condenser (not shown) and a machine room which constitute a well-known refrigeration cycle together with the cooler 26 are provided at a rear portion inside the machine room 99. Blowers are installed. A kick plate 102 is attached to the lower side of the heat insulating door 18 at the front end of the machine room 99. The kick plate 102 is provided with an air inlet 103 for ventilating the inside of the machine room 99. ing.
[0040]
With the above configuration, when the compressor 101 and the blower 29 are operated, the cool air in the cooling chamber 24 cooled by the cooler 26 is sucked upward by the fan 32 of the blower 29, and the front freezing chamber discharge port 13A is provided. .. It is blown out into the freezer compartment 13. Then, after circulating and cooling the containers 16A and 17A in the freezing room 13, the cool air returns to the cooling room 24 from the lower freezing room suction ports 13B, 13B, 13C and 13C. As a result, the freezing compartment 13 is maintained at a predetermined freezing temperature (about −20 ° C.). The operation of the compressor 101 and the blower 29 is controlled based on a freezing room temperature sensor that detects the temperature in the freezing room 13.
[0041]
Here, the cold air flowing from the freezer compartment inlets 13B, 13B flows into the cooler 26 from the region 26A at the lower end of the cooler 26 and rises between the fins 27. The cool air that has flowed in from 13C flows into cooler 26 from a region 26B slightly below the upper and lower central portions of cooler 26.
[0042]
As will be described later, since the humid cold air circulating in the refrigerator compartment 11, the ice warming compartment 10 and the vegetable compartment 12 flows from the vegetable compartment suction duct 91 from the area 26A at the lower end of the cooler 26, Although a large amount of frost adheres and grows in the region 26A, the cool air flowing from the freezing compartment suction ports 13C, 13C flows from above (downstream side) into the region 26B of the cooler 26 where the fin density is low. Since it is introduced into the area below the dense blower 29, the cool air flowing from the area 26B is not hindered from flowing by the frost that has grown in the area 26A.
[0043]
Therefore, even when the region 26A, which is the cool air inflow side end of the cooler 26, is blocked by the growth of frost, the suctioned cool air from the freezing compartment 13 can flow into the region 26b having a low fin density downstream thereof. Therefore, the cooling capacity of the freezing compartment 13 can be maintained satisfactorily.
[0044]
Further, since the fin density on the downstream side of the region 26B corresponding to the lower side of the blower 29 is high, the cooling capacity of the cooler 26 can be effectively used for cooling the freezing compartment 13.
[0045]
Furthermore, since the regions 26C... Of low fin density are also formed on the left and right front and rear edges of the cooler 26, even if the region 26A is closed by the growth of frost, the region 26C is not removed. Frost blockage is delayed.
[0046]
Therefore, even in such a case, since the cool air can be introduced from the region 26C into the cooler 26 and heat exchange can be performed, the heat exchange between the fins 27 and the flowing cool air is generally maintained, and the cooling capacity of the cooler 26 is maintained. Can be significantly improved.
[0047]
Further, since the regions 26C are formed on the left and right other than the center of the cooler 26 corresponding to the blower 29, the fin density of the cooler 26 where the cool air flows most becomes dense as described above. Therefore, when the frost grows while maintaining the heat exchange efficiency in a state where there is no or little frost, the flow of the cool air is maintained from the regions 26B and 26C as described above, and the heat exchange is secured. Will be able to do it.
[0048]
A part of the cool air blown out from the blower 29 flows into the guide duct 39 and is divided into two directions by the branch duct 42, and one of the cool air flows into the refrigerator room rear duct 47 through the refrigerator room baffle 43 of the motor damper 46. I do. The cold air that has flowed into the refrigerator compartment rear duct 47 is blown into the refrigerator compartment 11 from the refrigerator compartment discharge ports 11A, and circulates through the inside of the refrigerator compartment for cooling. After that, the refrigerator compartment suction port 61 and the refrigerator compartment front suction port 79, It flows into 81.
[0049]
In addition, the other flow split by the branch duct 42 flows into the ice greenhouse duct 48 via the ice greenhouse baffle 44 of the motor damper 46. The cold air that has flowed into the ice greenhouse duct 48 is blown out of the ice greenhouse 10 through the ice greenhouse discharge ports 71, circulates through the inside, and then flows into the ice greenhouse suction port 84.
[0050]
The motor damper 46 opens and closes the baffle 43 based on the output of the refrigerator compartment temperature sensor 104, and maintains the refrigerator compartment 11 at a refrigerator temperature of about + 5 ° C. Further, the baffle 44 is opened and closed based on the output of the ice temperature chamber temperature sensor 106 to maintain the inside of the container 19A in the ice temperature chamber 10 in an ice temperature region of, for example, about 0 ° C. to −3 ° C.
[0051]
The cold air flowing into the post-refrigeration room suction port 61 and the ice hot room suction port 84 flows into the return duct 63 as it is, but the cool air flowing from the cooling chamber front suction ports 79 and 81 is cooled by the cold room suction ducts 77 and 78. Then, the air flows into the return duct 63 through the inside. Further, a part (a small amount) of the cold air flowing into the ice greenhouse duct 48 flows directly into the cold storage chamber suction duct 77 through the communication passage 83 without passing through the ice greenhouse 10, and flows from the suction port 79. The air merges with the cool air and flows into the return duct 63.
[0052]
Here, as described above, the passage length of the left refrigerator compartment suction duct 77 is longer than the passage length of the right refrigerator compartment suction duct 78. Therefore, at the same passage cross-sectional area and suction area, the flow path resistance of the refrigerator compartment suction duct 77 becomes larger than the flow path resistance of the refrigerator compartment suction duct 78, so that the amount of cold air sucked from the refrigerator compartment front suction port 79 is refrigerated. This is smaller than the amount of cool air sucked from the front suction port 81.
[0053]
If the amount of the intake cold air differs between the left and right sides of the refrigerator compartment 11, the cooling effect of the front part inside the refrigerator compartment 11 is deviated left and right, and in the embodiment, the left cools less than the right. The passage cross-sectional area of the left refrigerator compartment suction duct 77 is formed larger than the passage cross-sectional area of the right refrigerator compartment suction duct 78, and the suction portion 77A is formed to be larger than the suction portion 78A. The channel resistances of 77 and 78 are made substantially uniform. Therefore, the amount of cold air flowing into the inlets 79 and 81 in front of the refrigerator compartments is made substantially uniform, and the inside of the refrigerator compartment 11 can be cooled uniformly.
[0054]
Next, the cool air flowing into the return duct 63 flows into the vegetable compartment duct 87, descends there, and is discharged into the vegetable compartment 12 through the vegetable compartment discharge port 88. Then, after circulating in the vegetable compartment 12 and indirectly cooling the inside of the container 18A, it is sucked from the vegetable compartment 92, passes through the vegetable compartment suction duct 91 formed in the lower partition wall 9, and reaches the uppermost portion of the cooling chamber 24. Return to the bottom. Then, it flows again into the region 26A of the cooler 26 as described above.
[0055]
Thereby, the vegetables in the container 18A are kept cool at a temperature of about + 3 ° C. to + 5 ° C. in a state where drying is prevented. Since the low-temperature cold air (as it is cooled by the cooler 26) which has not passed through the ice room 10 and the refrigerator room 11 flows into the refrigerator, the load in the refrigerator room 11 and the ice room 10 increases temporarily. Even when the temperature of the cold air rises, the cooling capacity in the vegetable compartment 12 is ensured.
[0056]
In the embodiment, the cooler 26 is installed vertically and the cool air circulation direction is the vertical direction. However, the cooler 26 is not limited to this and may be installed horizontally and cool air may flow in the horizontal direction. In that case, the region 26C is formed in the upper and lower portions of the cooler 26.
[0057]
【The invention's effect】
As described above in detail, according to the present invention, a freezer compartment and a refrigerator compartment are formed in a heat insulating box, and a cooler and a blower are installed in a cooling chamber formed in the heat insulating box. In the refrigerator that is circulated in the freezer compartment and the refrigerator compartment by a blower, the cooler is composed of a plurality of fins arranged at predetermined intervals and a refrigerant pipe penetrating each fin, A region having a low fin density was formed in a portion downstream of the end portion , suction cold air from the freezing chamber was allowed to flow into the region, and suction cold air from the refrigerator compartment was allowed to flow into the cold air inflow side end. Therefore, even if the end of the cooler on the cool air inflow side is blocked due to the growth of frost due to the cool air sucked from the humid cold room, the cool air sucked from the freezer room has low fin density downstream. Can flow into the area.
[0058]
Therefore, it is possible to suppress or prevent the cold air from flowing into the freezing chamber from being hindered by the frost at the cool air inflow side end of the cooler , and particularly to maintain the cooling capacity of the freezing chamber cooled at the freezing temperature in a favorable state. Will be able to do it.
[0059]
According to the invention of claim 2, in addition to the above, a region having a low fin density is formed corresponding to the upstream side of the blower, and the fin density on the downstream side of the region is made high. effectively to be able to be utilized to cool the freezing chamber in which it is possible to further contribute to the improvement of the cooling effect of the refrigerating chamber.
[Brief description of the drawings]
FIG. 1 is a front view of a refrigerator according to the present invention.
FIG. 2 is a front view of the refrigerator of the present invention, excluding a heat insulating door.
FIG. 3 is a front view of the refrigerator excluding the heat insulating door from which the container and the like are removed.
FIG. 4 is a vertical sectional side view of the refrigerator of the present invention.
FIG. 5 is another vertical sectional side view of the refrigerator of the present invention.
FIG. 6 is still another vertical sectional side view of the refrigerator of the present invention.
FIG. 7 is a perspective view of a freezer compartment of the refrigerator of the present invention.
FIG. 8 is a transparent front view of a partition plate at the back of the freezer compartment of the refrigerator of the present invention.
FIG. 9 is an enlarged vertical sectional side view of a lower part of a cooler of the refrigerator of the present invention.
FIG. 10 is another enlarged vertical sectional side view of the lower part of the cooler of the refrigerator of the present invention.
FIG. 11 is a front view of a refrigerator of the refrigerator of the present invention.
FIG. 12 is a plan view of a refrigerator of the refrigerator of the present invention.
FIG. 13 is a side view of a refrigerator of the refrigerator of the present invention.
FIG. 14 is an exploded perspective view of an upper partition wall of the refrigerator of the present invention.
FIG. 15 is a plan sectional view of the upper partition wall of the refrigerator of the present invention.
FIG. 16 is a longitudinal sectional side view of a pre-partitioning member of the refrigerator of the present invention.
FIG. 17 is an exploded perspective view of a water supply tank for an automatic ice maker of the refrigerator of the present invention.
FIG. 18 is a vertical sectional side view of a water supply tank for an automatic ice maker of the refrigerator of the present invention.
FIG. 19 is a vertical sectional front view of a water supply tank for an automatic ice maker of the refrigerator of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Refrigerator 6 Insulated box 7 Middle partition wall 8 Upper partition wall 9 Lower partition wall 10 Ice warm room 11 Cold room 11A Cold room discharge port 12 Vegetable room 13 Freezer room 13A Freezer room discharge openings 13B, 13C Freezer room inlet 22 Partition plate 23 Cooler front plate 24 Cooling room 26 Coolers 26A, 26B, 26C Fin-sparse area 27 Fin 28 Refrigerant pipe 29 Blower 48 Ice greenhouse duct 63 Return duct 77, 78 Refrigerator room suction duct 79, 81 Refrigerator room front inlet 83 Connecting passage 87 Vegetable room duct

Claims (2)

While forming a freezer compartment and a refrigeration compartment in the heat insulating box, a cooler and a blower are installed in a cooling chamber formed in the heat insulating box, and the cool air cooled by the cooler is cooled by the blower into the freezing compartment and In a refrigerator circulating in the refrigerator compartment ,
The cooler is composed of a plurality of fins arranged at predetermined intervals, and a refrigerant pipe penetrating each fin, and a region where the fin density is low at a portion downstream of an end on the cold air inflow side. And the cold air sucked in from the freezer compartment is caused to flow into the region, and the cold air sucked from the refrigerator compartment is caused to flow into an end of the cold air inlet side . 2. The refrigerator according to claim 1, wherein a region having a low fin density is formed corresponding to an upstream side of the blower, and a fin density downstream of the region is high.

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