JP3003820B2 - Freezer refrigerator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention is used for food preservation and the like.
In particular, the present invention relates to a refrigerator which performs defrosting using heat radiation from a heater.

[0002]

2. Description of the Related Art In recent years, refrigerators and refrigerators have been increased in size, and a higher cooling capacity has been required in order to maintain the temperature in the refrigerator at a low temperature. However, when air is cooled to a temperature below freezing as in a refrigerator, a frosting phenomenon occurs on the surface of the cooler. This frost will block the air passage and extremely reduce the cooling capacity, requiring periodic defrosting.

An example of a conventional refrigerator-freezer will be described below with reference to the drawings. FIG.
FIG. 8 is a partial sectional view of the upper portion of a conventional refrigerator-freezer disclosed in Japanese Patent Publication No. 85, and FIG. 8 is a perspective view of the cooler shown in FIG. In FIG. 7, 1 is a refrigerator-freezer body, 2 is an inner box, 3 and 4 are freezer compartments and refrigerator compartments formed by partitioning up and down by a middle partition 5 in a refrigerator, 6 is a cooler, and 7 is a refrigerator compartment. A fan grill for separating the back surface from the cooler room 8 in which the cooler 6 is arranged; 9, a fan arranged above the cooler room 8; 10, a cool air outlet to the freezer room 3; An air outlet, 12 is an outlet duct for passing cool air through the back side of the inner box 2 to the refrigerator compartment 4, 13 is a suction duct for sucking air into the cooler room 8 through the inside of the partition 5, and 14 is cooling. A heat radiation heater 15 for defrosting, which is disposed below the cooler 6 in the chamber 8;
Is a heater cover for preventing molten water of frost from directly falling on the heat radiation heater 14.

The cooler 6 has a plurality of fins 6b having a long dimension in a direction perpendicular to a plurality of rows of meanderingly bent refrigerant pipes 6a.
The long fin 6b and the short fin 6c are located at the lower part of the cooler 6 on the inlet side of the air flow.
And are alternately arranged. In addition, bypass ducts 16a and 16b are provided on the surface of the fan grill 7 facing the lower part of the cooler 6 and on the surface of the inner box 2 facing the lower part of the cooler 6.

The operation of the conventional refrigerator-freezer constructed as described above will be described below with reference to the drawings. A part of the cool air cooled by the cooler 6 is sent out from the cool air outlet 10 to the freezing room 3 by the drive of the fan 9, returned to the cooler room 8 from the air outlet 11, and the rest from the outlet duct 12. It is sent out to the refrigerator compartment 4 and returns to the cooler compartment 8 from the suction duct 13 for forced circulation. During the cooling operation of the refrigerator-freezer,
Each time the door of the refrigerator compartment 4 is opened or closed, moisture enters the inside of the refrigerator from the outside, and this moisture becomes frost 17 and adheres much to the entrance side below the cooler 6. Thereby, in order to prevent the cooler 6 from having a reduced ventilation area and a remarkable decrease in the cooling performance in the refrigerator, air flows through the bypass ducts 16a and 16b during frost formation. However, the cooler 6
Since the whole is blocked by the frost 17, the cooling operation is stopped,
The heat radiation heater 14 generates heat to melt the frost 17.

[0006]

However, since the conventional refrigerator-freezer has the above-described structure, when the heat radiation heater 14 is heated to melt the frost 17, it may be located at a location away from the heat radiation heater 14 or in a shadow. However, there is a problem that the defrosting is not sufficient at the portion where the defrosting occurs, the defrosting time becomes long, and the power consumption increases.

The present invention has been made in view of the above problems, and has as its object to provide a refrigerator-freezer which can shorten the defrosting time and reduce power consumption.

[0008]

Refrigerator of the present invention, in order to solve the problems] In order to solve the above problems, a cooler consisting of a refrigerant pipe in which the refrigerant inside inserted perpendicular to the plurality of fins fins flows, horizontal Bent in a U-shape in the direction
A pipe bent in leading to the refrigerant pipe, the condenser is composed of disposed the frost thermal radiation heater up to the bottom of, and the heat radiant heater at the bottom of the heat radiant heater the pipe without a fin The whole U-shaped part is parallel
It is arranged close to the heat radiation heater .

[0009]

With the refrigerator of the present invention having the above-described structure, the heat radiated downward from the heat radiation heater can be efficiently transferred to the entire cooler by the heat pipe action of the refrigerant through the pipe to the refrigerant pipe. In addition, the defrosting can be performed in a short time in combination with the radiation heat from the heat radiation heater directly received by the cooler.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a partial cross-sectional view of the upper portion of the refrigerator, and FIG. 2 is a perspective view of a main part of the refrigerator of FIG.

In FIG. 1, 21 is a refrigerator-freezer body, 2
2 is an inner box, 23 and 24 are freezer compartments and refrigerating compartments formed by partitioning the inside of the compartment up and down with a middle partition 25, 26 is a cooler, 27 is a cooler in which the back of the freezer compartment 23 and the cooler 26 are arranged. A fan grill which separates the chamber 28, 29 is a cooler room 2
8, a fan 30 is a cool air outlet to the freezing room 23, 31 is an air outlet from the freezing room 23, and 32 blows cool air to the refrigerator 24 through the back side of the inner box 22. An outlet duct, 33 is a suction duct for sucking air into the cooler room 28 through the inside of the partition 25, 34 is a heat radiation heater for defrosting disposed below the cooler 26 in the cooler room 28, and 35 is a frost heater. A heater cover for preventing the molten water from dropping directly to the heat radiation heater 34, a pipe 36 is provided.
, And the music in the upward direction at both ends bent in a U-shape in the horizontal direction
And connected to the refrigerant pipe 26a of the cooler 26,
The pipe 36 is located below the heat radiation heater 34 without fins.
Radiates the entire U-shaped part in parallel with the heat radiation heater 34
It is arranged close to the heater 34.

As shown in FIG. 2, the cooler 26 is orthogonal to a plurality of rows of meandering bent refrigerant pipes 26a, and has a fin 26b having a long dimension in the height direction and a fin 26b having a short dimension in the height direction.
Long fins 26b and short fins 26c are alternately arranged at a lower portion of the cooler 26 on the inlet side of the air flow, and the refrigerant flows inside. Also,
Bypass ducts 37a and 37b are provided on a surface of the fan grill 27 facing the lower part of the cooler 26 and a surface of the inner box 22 facing the lower part of the cooler 26.

The operation of the refrigerator having the above-described structure will be described below with reference to the drawings. A part of the cool air cooled by the cooler 26 is sent out from the cool air outlet 30 to the freezing room 23 by the driving of the fan 29, and returned to the cooler room 28 from the air outlet 31.
The remainder is sent out from the blow-out duct 32 to the refrigerating room 24 and is forcedly returned from the suction duct 33 to the cooler room 28. Also, each time the doors of the freezer compartment 23 and the refrigerator compartment 24 are opened and closed during the cooling operation of the refrigerator-freezer, moisture enters from the outside into the refrigerator, and this moisture becomes frost 38 and adheres to the lower part of the cooler 26.

As a result, the cooling area of the cooler 26 decreases, and the cooling performance in the refrigerator decreases. Therefore, the cooling operation is stopped, and the heat radiation heater 34 generates heat to melt the frost 38. At this time, the heat from the heat radiation heater 34 is transmitted to the pipe 36, and the heat accumulated in the pipe 36 can be efficiently transferred to the refrigerant pipe 26a and to the entire cooler 26 by the heat pipe action. . On the other hand, the radiant heat of the heat radiation heater 34 is directly transmitted to the cooler 26 without being disturbed by the pipe 36 because the pipe 36 is disposed below the heat radiation heater. Therefore, the frost 38 attached to the cooler 26 can be defrosted in a short time.

Further, since the pipe 36 is provided at a lower portion of the cooler 26 on the air flow inlet side, the dehumidification is performed by the pipe 36 before the air containing moisture is sucked into the cooler 26 during the cooling operation. Frost 38 to cooler 26
The speed at which the cooling performance of the device decreases can be reduced.

As described above, the refrigerator-freezer according to the first embodiment of the present invention comprises a plurality of fins 26b, 26c and a fin 26.
b, 26c, a cooler 26 composed of a refrigerant tube 26a through which a refrigerant flows inside and a U-shaped bend in the horizontal direction.
A pipe 36 which Gerare ends leading to the refrigerant pipe 26a bent upward, is composed of defrosting heat radiant heater 34 which is arranged in a lower portion of the cooler 26, the fin pipe 36
Without the heat radiation heater 34, the heat radiation heater 34
The entire U-shaped part is brought close to the heat radiation heater 34 in parallel with
With the arrangement, the heat radiated downward from the heat radiation heater 34 can be efficiently transferred to the entire cooler 26 through the pipe 36 by the heat pipe action of the refrigerant to the refrigerant pipe 26a. The frost 38 attached to the cooler 26 can be quickly defrosted in combination with the radiation heat of the heat radiation heater 34 directly received by the 26, so that the defrosting time can be shortened and the power consumption can be reduced.

Next, a second embodiment of the present invention will be described with reference to the drawings. FIG. 3 is a partial cross-sectional view of the upper part of the refrigerator, and FIG. 4 is a perspective view of a main part of the refrigerator of FIG.

In FIG. 3, 41 is a refrigerator-freezer body, 4
2 is an inner box, 43 and 44 are freezer compartments and refrigerating compartments formed by vertically partitioning the inside of the compartment with a middle partition 45, 46 is a cooler, 47 is a cooler in which the back of the freezer compartment 43 and the cooler 46 are arranged. A fan grill that separates the chamber 48, 49 is the cooler room 4
8, a fan 50 is a cool air outlet to the freezing room 43, 51 is an air outlet from the freezing room 43, and 52 is a cool air blowout to the refrigerator 44 through the back side of the inner box 42. A blowing duct, 53 is a suction duct for sucking air into the cooler room 48 through the inside of the partition 45, 54 is a heat radiation heater for defrosting disposed below the cooler 46 in the cooler room 48, 55 is a frost heater. A heater cover 56 for preventing the molten water from dropping directly to the heat radiation heater 54 is a pipe disposed at a lower portion of the cooler 46 and connected to the cooler 46.

As shown in FIG. 4, the cooler 46 is orthogonal to a plurality of rows of meanderingly bent refrigerant pipes 46a, and has a fin 46b having a long dimension in the height direction and a fin 46b having a short dimension in the height direction.
Long fins 46b and short fins 46c are alternately arranged below the cooler 46, which is the inlet side of the air flow, so that the refrigerant flows inside. Also,
Bypass ducts 57a and 57b are provided on a surface of the fan grill 47 facing the lower part of the cooler 46 and a surface of the inner box 42 facing the lower part of the cooler 46.

The operation of the refrigerator constructed as described above will be described below with reference to the drawings. A part of the cool air cooled by the cooler 46 is sent out from the cool air outlet 50 to the freezing room 43 by the drive of the fan 49, and returned to the cooler room 48 from the air outlet 51,
The remainder is sent out from the blow-out duct 52 to the refrigerating room 44 and is forcedly returned from the suction duct 53 to the cooler room 48. Also, each time the doors of the freezer compartment 43 and the refrigerator compartment 44 are opened and closed during the cooling operation of the refrigerator, moisture enters from the outside into the refrigerator, and this moisture becomes frost 58 and adheres to the lower portion of the cooler 46.

As a result, the cooling area of the cooler 46 decreases, and the cooling performance in the refrigerator decreases. Therefore, the cooling operation is stopped, the heat radiation heater 54 generates heat, and the frost 58 is melted. Then, the heat from the heat radiation heater 54 is transmitted to the pipe 56, and the heat accumulated in the pipe 56 can be efficiently transferred to the refrigerant pipe 46a and to the entire cooler 46 by the heat pipe action. At this time, pipe 5
Since the diameter of the pipe 6 is larger than the diameter of the refrigerant pipe 46a, the amount of refrigerant accumulated in the pipe 56 is large, and the heat transfer amount performed by the refrigerant is much smaller than when the diameter of the refrigerant pipe 46a is the same. It will be big. Then, the frost 58 attached to the cooler 46 can be efficiently defrosted in a short time in combination with the radiant heat of the heat radiation heater 54 which is directly transmitted.

Further, since the pipe 56 is disposed below the cooler 46 on the air flow inlet side, the dehumidification is performed by the pipe 56 before the air containing moisture is sucked into the cooler 46 during the cooling operation. Frost 58 to cooler 46
The speed at which the cooling performance of the device decreases can be reduced.

As described above, the refrigerator according to the second embodiment of the present invention comprises a plurality of fins 46b, 46c and a fin 46.
b, a cooler 46 composed of a refrigerant pipe 46a vertically inserted into 46c and through which the refrigerant flows, a pipe 56 connected to the refrigerant pipe 46a, and a defrosting heat radiation heater 54 arranged at a lower part of the cooler 46. The pipe diameter of the pipe 56 is made larger than the pipe diameter of the refrigerant pipe 46a, and the pipe 56 is attached near the heat radiation heater 54, so that the amount of refrigerant accumulated in the pipe 56 can be increased. In addition, the amount of heat transferred to the cooler 46 by the heat pipe action can be remarkably improved, so that the radiant heat from the heat radiation heater 54 directly received by the cooler 46 can be defrosted in a short time, thereby reducing power consumption. be able to.

Next, a third embodiment of the present invention will be described with reference to the drawings. FIG. 5 is a partial cross-sectional view of the upper portion of the refrigerator, and FIG. 6 is a perspective view of a main part of the refrigerator of FIG.

In FIG. 5, 61 is a refrigerator-freezer body, 6
2 is an inner box, 63 and 64 are freezer compartments and refrigerating compartments formed by partitioning the inside of the refrigerator up and down with a middle partition 65, 66 is a cooler, 67 is a cooler in which the back of the freezer compartment 63 and the cooler 66 are arranged. A fan grill that separates from the chamber 68, 69 is the cooler room 6
8, a fan 70 is a cool air outlet to the freezing room 63, 71 is an air outlet from the freezing room 63, and 72 is a cool air blowout to the cold room 64 through the back side of the inner box 62. A blow-out duct, 73 is a suction duct for drawing air into the cooler room 68 through the inside of the partition 65, 74 is a heat radiation heater for defrosting disposed below the cooler 66 of the cooler room 68, and 75 is a frost heater. A heater cover for preventing the molten water from dropping directly to the heat radiation heater 74.
Is mounted on the side plate 76. The cooler 66
Is a refrigerant pipe 6 bent in a meandering shape in a plurality of rows as shown in FIG.
Fin 66b having a long dimension in the height direction perpendicular to 6a
The short fin 66c and the short fin 66c are alternately arranged at the lower part of the cooler 66, which is the inlet side of the air flow, so that the refrigerant flows therein. ing. Further, the cooler 6 of the fan grill 67
6 and a surface of the inner box 62 that faces the lower part of the cooler 66, the bypass ducts 77a and 77b
Is provided.

The operation of the refrigerator constructed as described above will be described below with reference to the drawings. A part of the cool air cooled by the cooler 66 is sent out from the cool air outlet 70 to the freezer compartment 63 by the drive of the fan 69, and returned to the cooler room 68 from the air outlet 71,
The remainder is sent out from the outlet duct 72 to the refrigerating compartment 64 and is returned from the suction duct 73 to the cooler compartment 68 for forced circulation.

Further, during the cooling operation of the refrigerator,
3. Every time the door of the refrigerator compartment 64 is opened and closed, moisture enters the inside of the refrigerator from the outside, and this moisture becomes frost 78 and adheres to the lower part of the cooler 66. As a result, the ventilation area of the cooler 66 decreases, and the cooling performance in the refrigerator decreases. Therefore, the cooling operation is stopped, the heat radiation heater 74 generates heat, and the frost 78 is melted. At this time, heat from the heat radiation heater 74 is transferred to the heater cover 7.
5 and then to the side plate 76 of the cooler 66 directly attached to the heater cover 75, and heat can be efficiently transferred to the entire cooler 66. Further, the frost 78 attached to the cooler 66 can be efficiently defrosted in combination with the radiant heat generated from the heat radiation heater 74 in a short time.

As described above, the refrigerator-freezer according to the third embodiment of the present invention comprises a plurality of fins 66b and 66c and a fin 66.
b, a cooler 66 composed of a side plate 76 and a refrigerant pipe 66a vertically inserted into 66c and through which the refrigerant flows,
Heat radiation heater 7 for defrosting disposed below cooler 66
4 and a heater cover 75 attached to the upper portion of the heat radiation heater 74. By attaching both ends of the heater cover 75 to the side plate 76, the heat of the heat radiation heater 74 is efficiently transmitted to the cooler 66. Since the frost 78 attached to the cooler 66 can be quickly defrosted, the defrosting time can be shortened and power consumption can be reduced.

[0029]

As described above, the refrigerator-freezer of the present invention comprises a cooler comprising a plurality of fins and a refrigerant pipe which is inserted vertically into the fins and through which the refrigerant flows, and which has a U-shape in the horizontal direction.
It is composed of a pipe whose both ends are bent upward and connected to the refrigerant pipe, and a defrosting heat radiation heater disposed at a lower portion of the cooler, and the pipe is provided with fins.
Parallel with the heat radiant heater at the bottom of the heat radiant heater without
In this configuration, the entire U-shaped portion is disposed close to the heat radiation heater, so that the heat radiated downward from the heat radiation heater can be efficiently transferred to the entire cooler by the heat pipe action of the refrigerant to the refrigerant pipe through the pipe. Since it can be conveyed, it is possible to perform defrosting in a short time together with radiation heat from the heat radiation heater directly received by the cooler, and power consumption can be reduced.

[Brief description of the drawings]

FIG. 1 is an upper partial sectional view of a refrigerator-freezer according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a main part of the refrigerator of FIG. 1;

FIG. 3 is an upper partial sectional view of a refrigerator-freezer according to a second embodiment of the present invention.

FIG. 4 is a perspective view of a main part of the refrigerator of FIG. 3;

FIG. 5 is an upper partial sectional view of a refrigerator according to a third embodiment of the present invention.

FIG. 6 is a perspective view of a main part of the refrigerator of FIG. 5;

FIG. 7 is an upper partial sectional view of a conventional refrigerator-freezer.

FIG. 8 is a perspective view of a cooler of a conventional refrigerator-freezer.

[Description of Signs ] 26 Cooler 26a Refrigerant tube 26b , 26c Fin 34 Heat radiation heater 35 Heater cover 36 Pipe

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroaki Kase 3--22 Takaidahondori, Higashiosaka-shi, Osaka Inside Matsushita Refrigerating Machinery Co., Ltd. (72) Teruhiko Taira 3--22 Takaidahondori, Higashiosaka-shi, Osaka Matsushita Refrigeration Co., Ltd. (56) Reference JP-A-60-78269 (JP, A) JP-A-59-80670 (JP, U) JP-A-61-3381 (JP, U) JP-A 64-19888 ( JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) F25D 21/08

Claims (1)

(57) [Claims] 1. A cooler comprising a plurality of fins and a refrigerant pipe inserted perpendicular to the fins and through which a refrigerant flows,
A pipe which is bent in a U-shape in the horizontal direction and both ends of which are bent upward and which is connected to the refrigerant pipe, and a heat radiation heater for defrosting disposed at a lower portion of the cooler. Without the fin, the heat
The entire U-shaped portion is parallel to the radiant heater by the heat radiant heater.
Refrigerator, characterized in that in proximity to disposed.