JPH11101565A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerator for efficiently eliminating frosting of a partition wall by a heater. SOLUTION: In the refrigerator 1, a heat insulation case 6 is partitioned by a partition wall 7 into a deep freezing chamber 13 and icing temperature chamber 10 to be formed so that the wall 7 of a part opposed to the chamber 10 is heated by an electric heater. A control means for controlling a heat quantity of the heater is provided. The means increases the heat quantity of the heater in the case that set temperature of the icing temperature chamber is raised, while the means decreases it in the case that the set temperature of the chamber is lowered.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator in which a heat insulating box is divided into a plurality of rooms by partition walls.

[0002]

2. Description of the Related Art Conventionally, a refrigerator of this type has a freezing room, an ice green room and a cold room by dividing an insulated box body by partition walls as shown in, for example, Japanese Utility Model Publication No. 6-12301 (F25D23 / 00). And so on. The partition wall is attached to the inner box before filling the foam insulation material between the outer box and the inner box, and a part of the foam insulation material is also integrally filled in the partition wall.

[0003] In this case, a molded heat insulating material such as styrene foam is attached to the inside of the partition wall to maintain the shape. However, a space is formed in a portion other than the molded heat insulating material.
A foam insulation (foamed polyurethane insulation) enters into this space.

For example, in the case of a partition wall that separates an ice greenhouse and a freezer room, the partition wall facing the ice greenhouse is cooled by the temperature effect from the freezer room, so that the moisture in the ice greenhouse becomes free from frost. And become attached. Therefore, conventionally, a heater is provided on the surface of the partition wall to heat the partition wall, thereby preventing frost.

[0005]

The frost on the partition wall is caused by the temperature difference between the ice greenhouse and the freezing room. The greater the temperature difference, the more easily the frost is formed, and the smaller the temperature difference. It will be difficult to get around. However, in the past, regardless of the set temperature of the ice greenhouse, the calorific value of the heater was determined uniformly on the assumption that the temperature difference between the ice greenhouse and the freezer room became the maximum. On the other hand, when set, the heat load increases due to excessive heat generation, the cooling capacity of the ice greenhouse decreases, and the power consumption increases unnecessarily.

The present invention has been made to solve the above-mentioned conventional technical problem, and an object of the present invention is to provide a refrigerator capable of efficiently removing frost on a partition wall by a heater.

[0007]

According to the refrigerator of the present invention, a first storage room and a second storage room having a higher temperature than the first storage room are formed by partitioning the heat insulating box by a partition wall. The partition wall facing the second storage room is heated by a heater, and control means for controlling the amount of heat generated by the heater is provided. The control means sets the second storage room. When the temperature rises, the calorific value of the heater is increased, and when the set temperature of the second storage chamber decreases, the calorific value of the heater is reduced.

According to the present invention, the first storage room and the second storage room having a higher temperature than the first storage room are formed by partitioning the inside of the heat insulating box by the partition wall. In a refrigerator formed by heating a partition wall facing to a heater with a heater, a control means for controlling a calorific value of the heater is provided, and the control means is provided when the set temperature of the second storage chamber becomes high. Since the calorific value of the heater is increased and the calorific value of the heater is reduced when the set temperature of the second storage chamber is reduced, the calorific value of the heater is increased in a situation where frost is easily formed, In a situation where frost hardly adheres, the amount of heat generated by the heater can be reduced.

As a result, while effectively preventing frost on the partition wall, unnecessary heat generation is prevented, the adverse effect on the cooling effect is reduced, and the power consumption can be reduced.

A refrigerator according to a second aspect of the present invention is provided with a sensor for detecting the outside air temperature around the refrigerator installed in the above, and the control means controls the heater based on the output of the sensor when the outside air temperature is high. This is to uniformly reduce the calorific value.

According to the second aspect of the present invention, in addition to the above, a sensor for detecting the outside air temperature around the refrigerator is provided, and when the outside air temperature is high based on the output of this sensor, Since the calorific value of the heater is uniformly reduced, the calorific value of the heater can be reduced and the power consumption can be further reduced in a high external temperature condition where the relative humidity is low and frost is unlikely to be formed. It is something that will be.

[0012]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a front view of a refrigerator according to the present invention, and FIG.
Fig. 3 is a front view of the refrigerator excluding the heat insulating door, Fig. 3 is a front view of the refrigerator excluding the same heat insulating door, and Fig. 4 is a vertical side view of the refrigerator of the present invention, and Fig. 5 is another vertical side view of the refrigerator. FIG. 6 and FIG. 6 are still another longitudinal sectional side view of the refrigerator.

The refrigerator 1 has a front-opening heat-insulating box formed by filling a foam heat-insulating material 4 such as polyurethane foam between an outer box 2 made of a steel plate and an inner box 3 made of a hard resin such as ABS by an in-situ foaming method. 6. The interior of the heat insulation box 6
Each is divided into upper and lower four chambers by an upper partition wall 8, an intermediate partition wall 7, and a lower partition wall 9 attached to the inner box 3,
The refrigerator compartment 11 is located above the upper partition 8, the vegetable compartment 12 is located below the lower partition 9, and the ice compartment 10 is located between the upper partition 8 and the middle partition 7.
(Second storage room), a space between the middle partition wall 7 and the lower partition wall 9 is a freezing room 13 (first storage room). Also, the partition wall 7
The opening edge in the middle between the lower partition wall 9 and the
Is attached.

The opening of the front of the refrigerator compartment 11 is closed by a double door-type insulated door 14 so that it can be opened and closed.
Insulated drawer door 1 with 6A, 17A, 18A
6, 17 (the upper and lower freezer compartments 13) and 18 are openably and closably closed. Ice greenhouse 10
Is also openably and closably closed by a drawer-type heat-insulating door 19 provided with a container 19A having an upper surface opening.

In the upper left corner of the freezer compartment 13, an automatic ice maker 21 is installed. The automatic ice maker 21 includes an ice tray (not shown) and an ice maker motor for rotating and twisting the ice tray. Further, the interior of the freezer compartment 13 is partitioned forward and rearward 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,
A defrost heater 31 is provided below the cooler 26.

A plurality of freezer compartment outlets 13A are formed in the upper and center portions of the partition plate 22, and the freezer compartment inlets 13B, 13B are provided in the lower left and right portions of the partition plate 22, respectively.
However, the freezer compartment suction port 1
3C and 13C are formed adjacent to each other.

On the other hand, the cooler front plate 23 is provided behind the partition plate 22 at a small interval, and a grill 23A on which the fan 32 of the blower 29 faces 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. 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 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.

Here, the cooler 26 is shown in FIGS.
As shown in FIG. 3, a plurality of aluminum fins 27 are provided at predetermined intervals and extend vertically.
Is a so-called plate fin type heat exchanger comprising a refrigerant pipe 28 penetrating these fins 27... The fin density (pitch) at the lower end of the cooler 26 is reduced, and further, except for the central portion. The fin density at the left, right, front and rear is also sparse.

That is, the vertical dimension of each fin 27.
The two or three fins 27 are continuously short, the left and right fins 27 sandwiching them are long, and the vertical dimension of the short fins 27 in the center is further reduced every other fin. Each fin 27 located on the left and right
The front and rear width is also narrowed every other sheet.

As a result, a region 26A having a low fin density is provided at the lower edge portion of the cooler 26, and the region 26A is provided at the center portion.
A fin-density region 26B that rises continuously from A and extends slightly below the center in the upper and lower directions, and the left and right front and rear edges (cooling in which the edge of the fin 27 extending in the vertical direction through which cool air flows) are located. .. Are also formed in the outer part of the vessel 26). 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).

A guide duct 39 is formed above the blower 29 so as to vertically penetrate a rear portion of a molded heat insulating material 38 made of styrene foam, which will be described later, inserted into the partition wall 7. The lower part communicates with the space in front of the fan 32, and the upper part is connected to a branch duct 42 formed in the molded heat insulating material 41. The branch duct 42 passes through a motor damper 46 provided with a baffle 43 for the refrigerator compartment and a baffle 44 for the ice compartment, one of which is communicated with the duct 47 on the back of the refrigerator compartment and the other with the duct 48 of the ice compartment. The baffle 43 for the refrigerator compartment is located at the entrance of the duct 47 at the rear 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.

A rear duct plate 49 is attached to the back of the refrigerator compartment 11 at a distance from the back of the inner box 3, and the refrigerator compartment extending vertically between the rear duct plate 49 and the inner box 3 is provided. A rear duct 47 is formed. On the front surface of the rear duct plate 49, a refrigerator outlet 11A is formed. Also,
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 rear side of the refrigerator compartment 11, a rear refrigerator compartment suction port 61 is formed, and this rear refrigerator compartment suction port 61 is formed and heat-insulated on the rear side of the rear plate 62 of the ice warm room 10. The members 38 and 41 communicate with the upper part of the return duct 63 formed on the side.

Further, a water supply tank 52 for supplying water to the automatic ice making machine 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 that is long and narrow and opens on the upper surface, a cover 54 that closes the upper surface opening of the tank body 53,
The cover 54 includes a cover member 56 attached to the cover 54 and the like.

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 includes hinge portions 56A, 5A on both sides of the trailing edge.
6A is rotatably supported by the cover 54 behind the inlet 57 so as to openably close the inlet 57.

The lid member 56 has a concave shape along the inner surface of the concave portion 54A, whereby the lid member 56 is configured so that fingers 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.

When installing the water supply tank 52, the water supply tank 52 is inserted into the refrigerator compartment 11 from the front, and the connecting 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, and the water in the tank main body 53 is sucked up from the water absorbing cylinder 54 B and supplied to the ice making tray of the automatic ice making machine 21 via the connecting part 54 C and the water supply pipe 59. The ice making operation is performed there. The generated ice will be stored in the freezing room 13.

When the water in the tank body 53 is exhausted by the ice making operation, the water supply tank 52 is moved to the refrigerator compartment 11.
In this case, the water supply tank 52 can be easily pulled out by inserting a finger into the recessed lid member 56, hooking the finger, and pulling the finger forward.

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, the lid member 56 can be easily opened and closed. Therefore, the injection work is also facilitated. 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 injection port 57 (FIG.
9) It is possible to prevent water from leaking from the injection port 57 due to shaking at the time of transportation.

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 formed heat insulating material 68 and the lower plate 67. Ice greenhouse duct 4
Numeral 8 is configured to expand forward from a rear entrance 48A by a blind alley-shaped partition wall 69 provided on the upper surface of the lower plate 67, and the lower plate 67 located in the middle and front thereof has an ice greenhouse. A plurality of discharge ports 71 are formed.

The lower and right lower plates 67 in front of the partition 69
Are provided, and two refrigerating chamber suction ducts 77 and 78 are arranged side by side in the upper partition wall 8 outside the ice greenhouse duct 48. The front of the upper plate 66 has left and right refrigerator compartment suction ports 79 and 81 formed on the left and right, and the left refrigerator compartment front suction port 7.
Numeral 9 communicates with the inlet 77A of the left refrigerator compartment suction duct 77, and the right refrigerator compartment front suction port 81 communicates with the inlet 78A of the right refrigerator compartment suction duct 78. Also,
The rear end of each refrigerator compartment suction duct 77, 78 communicates with the return duct 63.

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 77 A is also connected to the suction portion 7.
8A (FIG. 15). Here, since the refrigerator compartment suction ducts 77 and 78 are formed so as to detour from the front side of the ice greenhouse duct 48 to the right side, the passage length of the refrigerator compartment suction duct 77 on the left side is equal to the passage length of the refrigerator compartment suction duct 78 on the right side. It is longer than long.

A narrow communication passage 83 is formed between the partition wall 72 and the partition wall 69. The communication passage 83 connects the front end of the ice greenhouse duct 48 and the suction portion 77A of the refrigerator compartment suction duct 77. ing. 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.

On the other hand, the upper end of the vegetable compartment duct member 86 is connected to the right part of the molded heat insulating material 38, and descends downward on the right side of the cooling room 24 to form 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.

A vegetable compartment suction duct 91 is formed in the lower partition wall 9. The vegetable compartment suction duct 91 is connected to the vegetable compartment 1.
2, opened at the vegetable compartment suction port 92 opened at the top of the back,
In addition, it communicates with the lower end of the cooling chamber 24.

Next, the partition 7 is shown in FIGS.
As shown in FIG.
And the formed heat insulating material 38 inserted between the upper and lower plates 131 and 132. In this case, the formed heat insulating material 38 is formed in a shape sandwiched by the upper and lower plates 131 and 132, and the left and right side surfaces of the partition wall 7 are provided with the upper and lower plates 1.
The front and rear inflow holes 13 are cut out by cutting
3, 134 are formed.

The lower plate 132, which is located at the rear edge of the rear inflow hole 134, is integrally formed with claws 136 that protrude outward (left and right directions) and then extend rearward. A central raised portion 38A and left and right concave portions 38B, 38B are formed on the upper and lower surfaces of the molded heat insulating material 38, and the raised portion 38A comes into contact with the inner surfaces of the upper and lower plates 131, 132 to maintain the interval. Play a role. Thus, spaces G are formed on the left and right sides of the protruding portion 38A on the left and right sides of the upper and lower plates 131 and 132, respectively, and these spaces G communicate with the front and rear inflow holes 133 and 134.

Further, an electric heater 119 for preventing frost is attached to the inner surface of the upper plate 131. in this case,
The electric heater 119 is disposed such that a portion corresponding to the raised portion 38A of the molded heat insulating material 38 is particularly dense (indicated by 119A in the figure).

On the other hand, on the left and right wall surfaces of the inner box 3, a rail portion 141 extending back and forth is formed so as to project toward the outer box 2.
A rear outflow hole 144 is formed at the rear of the rail portion 141. Further, a protruding portion 143 further protruding toward the outer box 2 is formed integrally with a front portion of the rail portion 141.
A front outflow hole 142 is formed in the outer end wall of the overhang portion 143.

With the above construction, when the partition wall 7 is attached to the inner box 3, the partition wall 7 is inserted from the front of the inner box 3 so as to correspond to the rail portion 141 of the inner box 3. that time,
The claw 136 must pass through the front outflow hole 142, but since the front outflow hole 142 is formed on the wall surface of the overhang portion 143, the front outflow hole 142 is located outside the claw 136 as is clear from FIG. Accordingly, the claw 136 does not engage with the front outflow hole 142 when the intermediate partition wall 7 is inserted, and the insertion workability is improved.

When the partition 7 is further inserted, the claws 136
Eventually, it reaches the rear outflow hole 144, passes through it, and
Project to the side. When the partition wall 7 is inserted to a predetermined position, the claw 136 finally engages with the rear edge of the rear outflow hole 144. In the figure, reference numeral 146 denotes each of the holes 133, 134, and 14.
The sealing material is located above and below 2, 144 between the partition wall 7 and the inner box 3.

In this state, the partition wall 7 is fixed to the inner box 3, the front inflow hole 133 corresponds to the front outflow hole 142, and the rear inflow hole 134 corresponds to the rear outflow hole 144. , The space G and the space between the inner and outer boxes 3, 2 are communicated. Then, the foam insulation 4 between the outer box 2 and the inner box 3
Is filled, the foamed heat insulating material 4 has front and rear outflow holes 142, 1
After exiting from 44, the space G from the front and rear inflow holes 133, 134
・ Enter inside. Thereafter, the foamed heat insulating material 4 solidifies between the upper plate 131 and the formed heat insulating material 38 and between the lower plate 132 and the formed heat insulating material 38 and adheres thereto, so that the three members are firmly fixed.

As a result, the formed heat insulating material 38 and the foamed heat insulating material 4 are arranged side by side in the partition wall 7.
In the above configuration, the lower partition wall 9 is assumed to have the same structure, although the shape is different.

Next, as shown in FIG. 16, the pre-partitioning member 15 has 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 steel plate, and It is composed of an attached high-temperature refrigerant pipe 97 for preventing dew condensation, and 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 stepped high.

At the rear end of the front portion 93A, an engaging portion 93C is formed integrally at a position slightly above the lower surface of the front portion 93A and protrudes rearward with a space below the rear portion 93B. . 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.

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 with the heat insulating door 17 closed, and in this case, the base 98A of the sealing member 98 is closed. The lower surface is substantially flush with the lower surface of the front portion 93A of the main body 93. 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.

This structure is similarly formed on the other partition walls 7, 8, and 9. Also, 104
Is a refrigerator compartment temperature sensor for detecting the temperature in the refrigerator compartment 11, attached to the rear duct plate 49, and 106 is an ice temperature compartment temperature sensor for detecting the temperature in the ice compartment 10;
It is attached to the lower plate 67.

Further, a machine room 99 is formed at a lower portion of the heat insulating box 6, and a compressor 101 and a condenser (not shown) constituting a well-known refrigeration cycle are provided in the rear portion of the machine room 99. , A machine room blower and the like 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 has an air inlet 103 for ventilating the inside of the machine room 99. ing.

Next, FIG. 20 shows the control device 10 of the refrigerator 1.
8 shows a block diagram of an electric circuit of FIG. Control device 10
8 is constituted by a general-purpose microcomputer 110, and the microcomputer 110 includes a freezing room 13
Freezer compartment temperature sensor 109 for detecting the temperature inside the refrigerator, the refrigerator compartment temperature sensor 104, and the ice compartment temperature sensor 10
6. An outside air temperature sensor 111 for detecting the outside air temperature around the refrigerator 1 installed, an ICE sensor 112 for detecting the temperature of the ice tray of the automatic ice maker 21, a setting circuit 113 including a volume for temperature setting, etc. Current detection circuit 114 for detecting the current supplied to each motor to be activated, and a door switch circuit 116 comprising a plurality of switches for detecting the opening and closing of each of the heat insulating doors 14, 14, 16, 17, 18, 19
Output is input.

A compressor motor 101M comprising a DC motor for driving the compressor 101 is connected to the output of the microcomputer 110 via a driver 122.
A blower motor 29M composed of a DC motor for driving the blower 29 is connected via a driver 123, and a machine room blower motor 117 composed of a DC motor for driving the machine room blower is connected via a driver 124. An ice maker motor 21M comprising a DC motor for rotating the ice tray 21 is connected via a driver 126,
A pump motor 118 composed of a DC motor for driving a pump for supplying water from the water supply tank 52 to the ice tray of the automatic ice maker 21 is connected via a driver 127, and the damper motor 46 of the motor damper 46 composed of a DC motor is connected.
M are connected via a driver 128, respectively.

A relay circuit 129 driven by a DC power supply is connected to the output of the microcomputer 110. The relay circuit 129 is connected to the defrost heater 31, the electric heater 119 of the partition wall 7, and the lower heater. Electric heaters 121 similarly provided in the partition wall 9 for preventing frost are connected.

The operation of the above configuration will be described. The microcomputer 110 drives the compressor motor 101M, the machine room blower motor 117, and the blower motor 29M based on the output of the freezing room temperature sensor 109 when the temperature in the freezing room 13 has reached a predetermined upper limit temperature. I do. Thus, 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 ports 13A,. It is blown out into the freezer compartment 13.

The containers 16A, 17 in the freezer compartment 13
After circulating and cooling the inside of A, the cool air returns to the cooling chamber 24 from the lower freezing chamber suction ports 13B, 13B, 13C, 13C. When the temperature in the freezer compartment 13 drops to a predetermined lower limit temperature, the microcomputer 110
M, the machine room blower motor 117 and the blower motor 29M are stopped. Thereby, the freezing compartment 13 is set at the set temperature (−2
(About 0 ° C.).

Here, the cool air flowing from the freezer compartment suction ports 13B, 13B flows into the cooler 26 from the lower region 26A of the cooler 26 and rises between the fins 27. The cool air flowing in from the ports 13C, 13C is in a region 26 slightly lower than the central portion above and below the cooler 26.
B flows into the cooler 26.

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, the cooling is performed. A large amount of frost adheres and grows in the region 26A of the cooler 26, but the cool air flowing from the freezing chamber suction ports 13C, 13C flows from above (downstream side) into the region 26B having a low fin density of the cooler 26, and thereafter Since the fin density is introduced into the region below the dense blower 29, the flow of the cool air flowing from the region 26B is not hindered by the frost that has grown in the region 26A.

The left and right front and rear edges of the cooler 26 (the outer portion of the cooler 26 where the edges of the fins 27 extending in the vertical direction through which the cool air flows) are also located in the regions 26 having a low fin density.
.. Are configured, even if the area 26A is blocked by the growth of frost, the area 26C
Frost blockage is delayed by the presence of

Therefore, even in such a case, since the cool air can be introduced into the cooler 26 from the region 26C and heat exchange can be performed, the heat exchange between the fins 27 and the flowing cool air is generally maintained, and the cooler 26 is cooled. Can significantly improve the cooling capacity.

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 portion of the cooler 26 where 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.

A part of the cool air blown out from the blower 29 flows into the guide duct 39 and is divided in two directions by the branch duct 42, and one of the cool air passes through the cooler baffle 43 of the motor damper 46, and the other cools the rear duct of the cooler. It flows into 47. Cold air flowing into the refrigerator compartment rear duct 47 is discharged from the refrigerator compartment outlet 11A.
.. Are blown out into the refrigerator compartment 11 and circulated through the inside of the refrigerator to cool it.
9 and 81.

The other part of the 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 from the ice greenhouse discharge ports 71 to the ice greenhouse 10, circulates through the inside and cools, and then flows into the ice greenhouse suction port 84.

The microcomputer 110 controls the driving of the damper motor 46M, and outputs the signals from the refrigerator compartment temperature sensor 104 and the ice compartment temperature sensor 106 to the refrigerator compartment 1 respectively.
By driving both baffles 43 and 44 on the basis of the temperature inside 1 and the temperature inside the ice chamber 10, the opening / closing, opening / closing,
It creates four types of states: closed / open and closed / closed.

That is, the microcomputer 110 opens and closes the baffle 43 based on the output of the refrigerator compartment temperature sensor 104, and sets the inside of the refrigerator compartment 11 to +5 which is the set temperature of the refrigerator compartment 11 set by the R volume of the setting circuit 113. Maintain a refrigeration temperature of about ° C. Also, the ice greenhouse temperature sensor 106
The baffle 44 is opened and closed based on the output of the ice temperature chamber 10, and the inside of the container 19A in the ice temperature chamber 10 is set at the H volume of the setting circuit 113, for example, 0 ° C. to −3 which is the set temperature of the ice temperature chamber 10.
Keep in the ice temperature range of about ° C.

Here, the control of the electric heater 119 of the partition wall 7 by the microcomputer 110 will be described with reference to FIG. The microcomputer 110 determines in step S1
Then, it is determined whether the set temperature of the ice greenhouse 10 has been changed and the H volume has changed. If there is no change, the process proceeds to step S8, where one cycle time is counted (subtracted). In step S9, it is determined whether or not one cycle time is shorter than an OFF time described later, that is, the remaining time of the count is OFF time. It is determined whether or not it has become smaller.

If NO, the electric heater 119 is turned on (energized) to generate heat, and it is determined in step S12 whether one cycle time has become 0. If NO, the process returns to step S1 and repeats this. . Then, step S9
With 1 cycle time becomes shorter than OFF time, YES
Then, the process proceeds to step S10, where the electric heater 119 is turned on.
FF (de-energize) and proceed to step S12.

When the one-cycle time becomes zero in step S12, the flow advances to step S13 to set the one-cycle time, and returns to step S1 to repeat this. That is,
The microcomputer 110 first energizes the electric heater 119 within a very short one cycle time, and the remaining time is O.
When the time becomes shorter than the FF time, so-called duty control is performed in which the energization of the electric heater 119 is stopped. By adjusting the OFF time, the electric heater 119 is controlled as described later.
Is configured to be able to change the amount of heat generated.

Here, since the temperature of the freezing compartment 13 is lower than that of the ice keeping compartment 10, the temperature of the freezing compartment 10 is affected by the temperature through the partition wall 7, and frost is formed on the upper surface of the upper plate 131. Further, since the heat insulating performance of the molded heat insulating material 38 is inferior to that of the foamed heat insulating material 4, the upper surface of the upper plate 131 corresponding to the raised portion 38A of the formed heat insulating material 38 is more likely to generate frost than other portions.

The electric heater 119 generates heat and heats the upper plate 131 of the partition wall 7 to eliminate the frost generated on the upper surface thereof. In particular, as described above, since the electric heater 119 is provided with a portion corresponding to the raised portion 38A of the molded heat insulating material 38 more densely than other portions, the portion where the frost is likely to be generated is mainly heated and the frosted portion is heated. The occurrence can be effectively eliminated.

On the other hand, the set temperature of the ice greenhouse 10 is changed,
If there is a change in the H volume in step S1,
The microcomputer 110 proceeds to step S2 and sets H
Set VOL to H volume-weak setting voltage (weak setting of ice greenhouse)
In step S3, the VOL range is set to the strong setting voltage-the weak setting voltage (the strong setting and the weak setting of the ice greenhouse).

Next, in step S4, based on the output of the outside air temperature sensor 111, it is determined whether or not the outside air temperature around the refrigerator 1 is high (for example, not less than + 33 ° C.). Now, assuming that the outside air temperature is low and NO, the microcomputer 110 proceeds to step S6 and
At time F, one cycle time × (HVOL / VOL range) is set, one cycle time is set in step S7, and the process proceeds to step S9. Hereinafter, the same operation as described above is performed.

Here, the higher the H volume voltage, the lower the set temperature, and the lower the H volume voltage, the higher the set temperature. Also, since the VOL range is a constant in this case, the OFF time becomes longer as the set temperature becomes lower,
The higher the set temperature, the shorter the OFF time.

That is, the microcomputer 110 increases the set temperature of the ice room 10 and increases the temperature difference from the freezing room 13 to increase the amount of heat generated by the electric heater 119. When the temperature difference from the chamber 13 is reduced, the microcomputer 110 switches to the electric heater 119.
Reduce the amount of heat generated. As a result, while effectively preventing frost on the upper surface of the partition wall 7 in the former state, unnecessary heat generation in the latter state is prevented, the adverse effect on the cooling effect is reduced, and power consumption is reduced. You can plan.

If the outside air temperature is high and is equal to or higher than + 33 ° C., the microcomputer 110 proceeds to step S5, halves the VOL range, and proceeds to step S6. Thereby, the OFF time calculated in step S6 is doubled. That is, when the outside temperature is high, the relative humidity is low, and frost hardly adheres to the upper surface of the partition wall 7.
The power consumption is further reduced by reducing the calorific value of No. 19.

On the other hand, the cold air flowing into the post-refrigeration chamber suction port 61 and the ice temperature chamber suction port 84 flows into the return duct 63 as it is, but the cold air flowing from the cooling chamber front suction ports 79 and 81 is not cooled. The air flows into the return duct 63 through the suction ducts 77 and 78, respectively. Also, ice greenhouse duct 48
A part (a small amount) of the cool air flowing into the inside flows into the refrigerator compartment suction duct 77 directly through the communication passage 83 without passing through the ice temperature chamber 10, joins with the cool air from the suction port 79, and returns. It will flow into the duct 63.

Here, as described above, the passage length of the left refrigerator compartment suction duct 77 is longer than that 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 cold air sucked from the front suction port 81.

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 right and left, and in the embodiment, the left side is less cooled than the right side. However, as described above, 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 flow path resistance of the two ducts 77 and 78 is made substantially uniform. Therefore, the amount of cool air flowing into the inlets 79 and 81 in front of the refrigerating compartment is substantially uniform, and the refrigerating compartment 11
The inside can be cooled uniformly.

Next, the cool air flowing into the return duct 63 flows into the vegetable compartment duct 87, descends there, and is discharged from the vegetable compartment discharge port 88 into the vegetable compartment 12. 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, as described above, the region 26 of the cooler 26
A flows again into A.

As a result, 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.
3, that is, low-temperature cold air (as it is cooled by the cooler 26) that has not passed through the ice green room 10 or the cold room 11. Even when the load in the inside increases and the cold air temperature rises, the cooling capacity in the vegetable compartment 12 is ensured.

[0077]

As described above in detail, according to the present invention, the first storage room and the second storage room having a higher temperature than the first storage room are formed by partitioning the heat insulating box body by the partition wall. A refrigerator configured to heat a partition wall facing the second storage room with a heater, wherein a control means for controlling a calorific value of the heater is provided, and the control means controls a set temperature of the second storage room. When the temperature rises, the heat value of the heater is increased, and when the set temperature of the second storage chamber decreases, the heat value of the heater is reduced. And the amount of heat generated by the heater can be reduced in situations where frost is unlikely to form.

As a result, while effectively preventing frost on the partition wall, wasteful heat generation can be prevented, the adverse effect on the cooling effect can be reduced, and power consumption can be reduced.

According to the second aspect of the present invention, in addition to the above, a sensor for detecting the outside air temperature around the refrigerator is provided, and when the outside air temperature is high based on the output of this sensor, Since the calorific value of the heater is uniformly reduced, the calorific value of the heater can be reduced and the power consumption can be further reduced in a high external temperature condition where the relative humidity is low and frost is unlikely to be formed. It is something that will be.

[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 a heat insulating door from which a 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 longitudinal side view of the refrigerator of the present invention.

FIG. 6 is still another longitudinal side view of the refrigerator of the present invention.

FIG. 7 is a perspective view of a freezer compartment of the refrigerator according to 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 an 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.

FIG. 20 is a block diagram of an electric circuit of the control device of the refrigerator of the present invention.

FIG. 21 is a perspective view of a partition wall of the refrigerator of the present invention.

FIG. 22 is an exploded perspective view of a partition wall of the refrigerator of the present invention.

FIG. 23 is an enlarged vertical sectional front view of a side wall of a partition wall of the refrigerator according to the present invention.

FIG. 24 is a plan view showing a state where the refrigerator of the present invention is attached to the inner box of the partition wall.

FIG. 25 is a flowchart showing a program of a microcomputer.

[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 greenhouse 11 Refrigeration room 11A Refrigeration room discharge opening 12 Vegetable room 13 Freezing room 13A Freezing room discharge opening 13B, 13C Freezing room suction opening 24 Cooling room Reference Signs List 26 Cooler 38 Molded heat insulating material 46 Motor damper 48 Ice greenhouse duct 63 Return duct 77, 78 Cold room suction duct 79, 81 Cold room front suction port 87 Vegetable room duct 104 Cold room temperature sensor 106 Ice greenhouse temperature sensor 108 Control device 110 Microcomputer 111 Outside air temperature sensor 113 Setting circuit 119 Electric heater 131 Upper plate 132 Lower plate 133, 134 Front and rear inlet holes 136 Claw 142, 144 Front and rear outlet holes 143 Overhang

Continuation of the front page (72) Inventor Taira Muto 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Motoharu Kobayashi 2-5-5 Keihanhondori, Moriguchi-shi, Osaka No. Sanyo Electric Co., Ltd. (72) Inventor Goro Kayano 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd.

Claims (2)

[Claims] 1. A first storage compartment and a second storage compartment having a higher temperature than the first storage compartment by dividing the heat-insulating box body by a partition wall, and a portion facing the second storage compartment. A refrigerator configured to heat the partition wall with a heater, wherein a control means for controlling a heat generation amount of the heater is provided, and the control means, when the set temperature of the second storage chamber becomes high, the heater Wherein the calorific value of the heater is increased, and the calorific value of the heater is reduced when the set temperature of the second storage chamber decreases. 2. A sensor for detecting the outside air temperature around the refrigerator is provided, and the control means, based on the output of the sensor, uniformly reduces the amount of heat generated by the heater when the outside air temperature is high. The refrigerator according to claim 1, characterized in that: