JP2005241246A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerator capable of reducing power consumption required in heater energization by solving the problem wherein heat generation is required by energizing the heater for frosting prevention in order to prevent frosting generated in the refrigerator. <P>SOLUTION: This refrigerator has a constitution wherein a sensor for detecting the ambient outside air temperature is provided, and the outside air temperature is detected based on the sensor output, and the heating value of the heater for frosting prevention is reduced when the outside air temperature is high. Hereby, useless power consumption by the heater for frosting prevention can be reduced when the outside air temperature is high. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a refrigerator in which a heat insulating box is partitioned into a plurality of chambers by partition walls.

  Conventionally, this kind of refrigerator constitutes a freezing room, an ice greenhouse, a refrigerator room, etc. by partitioning the inside of a heat insulation box with a partition wall as shown, for example in patent documents 1. This partition wall is attached to the inner box before filling the foam heat insulating material filled between the outer box and the inner box, and a part of the foam heat insulating material is also integrally filled in the partition wall.

  In this case, a molded heat insulating material such as foamed polystyrene is attached in the partition wall to maintain the shape, but a space is formed in a portion other than the molded heat insulating material, and a foamed heat insulating material (foamed foam) is formed in this space. (Polyurethane insulation).

In addition, for example, in the case of a partition wall that partitions an ice greenhouse and a freezer compartment, the partition wall that faces the ice greenhouse is cooled by the temperature effect from the freezer compartment, so moisture in the ice greenhouse adheres as frost there. To come. Therefore, conventionally, a heater is provided on the surface of the partition wall and heated to prevent frost formation.
Japanese Utility Model No. 6-12301 (F25D23 / 00)

  By the way, the frosting of the partition wall is caused by a temperature difference between the ice greenhouse and the freezing room. The larger the temperature difference is, the more easily frost is formed, and the smaller the temperature difference is, the more difficult it is to attach. However, in the past, regardless of the temperature set in the ice greenhouse, the heating value of the heater was determined uniformly assuming the maximum temperature difference between the ice greenhouse and the freezer compartment. When set, the heat load increased due to excessive heat generation, the cooling capacity of the ice greenhouse decreased, and the power consumption was unnecessarily increased.

  The present invention has been made to solve the conventional technical problems, and an object of the present invention is to provide a refrigerator that can efficiently eliminate frost on the partition wall by a heater.

The present invention provides a refrigerator comprising a heater for eliminating the frosting, provided a control means for controlling the heating value of the heater, and a sensor for detecting an outside air temperature of the installed around the refrigerator, the control means Is characterized by reducing the amount of heat generated by the heater when the outside air temperature is high based on the output of the sensor .

According to the present invention, as a sensor for detecting an outside air temperature of the installed around the refrigerator provided, the control means, based on the output of the sensor, when the outside air temperature is high, to reduce the heating value of the heater since the, in the context of high outside air temperature to be difficult attached frost in which it is possible to reduce the power consumption by reducing the heating value of the heater.

According to the present invention, the sensor for detecting the outside air temperature around the refrigerator is provided, and the control means reduces the heat generation amount of the heater when the outside air temperature is high based on the output of the sensor. Therefore, the heat generation amount of the heater can be reduced and the power consumption can be reduced under the condition of the high outside air temperature at which frost is hardly formed .

  Thereby, while effectively eliminating frost on the partition wall, it is possible to prevent useless heat generation, reduce an adverse effect on the cooling effect, and reduce power consumption.

  Next, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a front view of the refrigerator of the present invention, FIG. 2 is a front view of the refrigerator excluding the heat insulating door, FIG. 3 is a front view of the refrigerator excluding the heat insulating door from which the container is removed, and FIG. A side view, FIG. 5 is another longitudinal side view of the refrigerator, and FIG. 6 is still another longitudinal side view of the refrigerator.

The refrigerator 1 is composed of an outer box 2 made of a steel plate and a heat insulating box 6 having a front opening formed by filling a foam insulating material 4 such as foamed polyurethane in an in-situ foaming manner between an inner box 3 made of hard resin such as ABS. Has been. The interior of the heat insulating box 6 is partitioned into four upper and lower chambers by an upper partition wall 8, an intermediate partition wall 7 and a lower partition wall 9 attached to the inner box 3, and the upper part of the upper partition wall 8 is refrigerated. Chamber 11,
Below the lower partition wall 9 is a vegetable compartment 12, between the upper partition wall 8 and the middle partition wall 7 is an ice greenhouse 10 (second storage room), and between the middle partition wall 7 and the lower partition wall 9 is a freezer compartment 13 ( The first storage room). A pre-partition member 15 is attached to the opening edge in the middle between the middle partition wall 7 and the lower partition wall 9.

  The front opening of the refrigerating chamber 11 is closed openably and closably by the double-split heat insulating doors 14 and 14, and the freezer compartment 13 and the vegetable compartment 12 are drawer-type equipped with containers 16A, 17A, and 18A having top openings. The heat insulating doors 16 and 17 (the freezer compartment 13 has two upper and lower stages) and 18 are closed so as to be freely opened and closed. In addition, the ice greenhouse 10 is also closed by a drawer-type heat insulating door 19 provided with a container 19A having an upper opening.

  An automatic ice making machine 21 is installed in the upper left corner of the freezer compartment 13. The automatic ice making machine 21 includes an ice making tray (not shown) and an ice making motor that rotates and twists the ice making tray. Further, the inner part of the freezer compartment 13 is divided forward and backward by a partition plate 22 and a cooler front plate 23, and a cooling chamber 24 is formed on the rear side of 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.

  A plurality of freezer compartment discharge ports 13 </ b> A... Are formed in the upper and central portions of the partition plate 22, and freezer compartment suction ports 13 </ b> B and 13 </ b> B are provided on the lower left and right sides of the partition plate 22. Freezer compartment inlets 13 </ b> C and 13 </ b> C are also formed adjacent to each other at the lower central portion.

  On the other hand, the cooler front plate 23 is provided on the rear side of the partition plate 22 with a small clearance, and a grille 23A on which the fan 32 of the blower 29 faces is formed on the upper portion. A space between the partition plate 22 on the front side of the fan 32 and the cooler front plate 23 communicates with the freezer compartment 13A. In addition, an opening 23B is formed in the lower central portion of the cooler front plate 23, and communicates with the freezer compartment inlets 13C and 13C and the inside of the cooling compartment 24. The freezer compartment inlets 13 </ b> B and 13 </ b> B communicate with the lowermost part of the cooling compartment 24 through the lower end of the cooler front plate 23.

  Here, a plurality of the coolers 26 are provided at predetermined intervals as shown in FIGS. 11 to 13, and fins 27 made of aluminum thin plates extending in the vertical direction, and these fins 27. 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 sparse, and the fin density at the left and right front and rear portions excluding the central portion is also It is sparse.

  That is, the vertical dimension of each fin 27... Is composed of two or three fins 27 are continuously short, the left and right fins 27 sandwiching them are long, and the short fins 27 are formed at the center. The vertical dimension is even shorter every other sheet. Moreover, the front-rear width of each fin 27.

  As a result, a fin density sparse region 26A is formed at the lower edge of the cooler 26, and a fin density sparse region 26B that rises continuously from the region 26A at the center and extends slightly below the center at the top and bottom. Also, the fin density sparse regions 26C... Are also formed on the left and right front and rear edges (outer portions of the cooler 26 where the edges of the fins 27 extending in the vertical direction through which the cool air flows are located). The area 26B corresponds to the lower side of the blower 29, and the opening 23B corresponds to the front side of the area 26B (FIG. 8).

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

  A rear duct plate 49 is attached to the back of the refrigerating chamber 11 with a space from the back of the inner box 3, and the refrigerating chamber rear duct 47 extending vertically between the rear duct plate 49 and the inner box 3. Is formed. A refrigerator outlet 11 </ b> A is formed in front of the rear duct plate 49. Further, a plurality of shelves 51 are built in the refrigerator compartment 11. Further, a rear refrigerator compartment inlet 61 is formed in the lower right corner of the rear duct plate 49 on the rear side of the refrigerator compartment 11, and the rear refrigerator compartment inlet 61 is formed and insulated on the rear side of the rear plate 62 of the ice greenhouse 10. It communicates with the upper part of the return duct 63 formed on the side of the members 38 and 41.

  Further, a water supply tank 52 for supplying water to the automatic ice making machine 21 is accommodated in the lower left corner of the refrigerator compartment 11. As shown in FIGS. 17 to 19, the water supply tank 52 includes a tank main body 53 that is elongated in the front and rear direction and opened on the upper surface, a cover 54 that closes the upper surface opening of the tank main body 53, and a lid member 56 attached to the cover 54. Etc.

  In this case, a rectangular recessed portion 54A is formed in the front portion of the cover 54, and a rectangular injection port 57 is also formed on the bottom surface of the recessed portion 54A. The lid member 56 pivotally supports the hinge portions 56A and 56A on both sides of the rear edge to the cover 54 behind the injection port 57 to close the injection port 57 so that the injection port 57 can be opened and closed.

  The lid member 56 has a concave shape that conforms to the inner surface shape of the concave portion 54 </ b> A, whereby the lid member 56 is configured so that fingers can be sufficiently applied. Further, at the rear part of the cover 54, a water absorption cylinder part 54B descends into the tank body 53, and this water absorption cylinder part 54B communicates with a connecting part 54C that opens rearward at the rear end of the cover 54.

  When installing this water supply tank 52, it inserts in the refrigerator compartment 11 from the front, and connects the connection part 54C to the water supply pipe 59 provided in the back part so that attachment or detachment is possible. The water supply pipe 59 communicates with the automatic ice making machine 21, and the water in the tank body 53 is sucked up from the water absorption cylinder part 54 </ b> B and supplied to the ice making tray of the automatic ice making machine 21 through the connecting part 54 </ b> C and the water supply pipe 59. The ice making operation is performed there. The generated ice is stored in the freezer compartment 13.

  When the water in the tank main body 53 is exhausted by the ice making operation, the water supply tank 52 is pulled out from the refrigerator compartment 11, but in this case, a finger is inserted into the recessed lid member 56 and hooked. By pulling on the water supply tank 52, the water supply tank 52 can be easily pulled out.

  Then, the lid member 56 is rotated from the front to the top to open the injection port 57, and water is replenished into the tank body 53. In this case, the lid member 56 can be easily opened and closed. Work becomes easy. Further, after refilling, the lid member 56 is closed and carried. In this case, the lid member 56 is located along the inner surface of the recessed portion 54A of the cover 54 and closes the injection port 57 ( 19), it is also possible to prevent water from leaking from the injection port 57 due to shaking during transportation.

On the other hand, as shown in FIGS. 14 and 15, the upper partition wall 8 is composed of an upper plate 66 and a lower plate 67 made of hard resin, and a molded heat insulating material 68 provided along the lower surface of these upper plates 66. 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 to expand forward from a rear inlet 48A by a bag path-like partition wall 69 standing on the upper surface of the lower plate 67. The ice greenhouse duct 48 is formed on the lower plate 67 located in the middle and front thereof. A plurality of ice greenhouse outlets 71 are formed.

  In addition, partition walls 72 to 74 are erected on the lower plate 67 in front and on the right side of the partition wall 69, and thereby, in the upper partition wall 8 outside the ice greenhouse duct 48, two refrigerator compartment suction ducts 77 are provided. , 78 are arranged side by side. The front plate 66 has left and right refrigerating chamber front inlets 79 and 81 formed on the left and right sides. The left front refrigerating chamber suction port 79 is connected to the inlet 77A of the left refrigerating chamber suction duct 77, and The right refrigeration room front suction port 81 communicates with the inlet portion 78A of the right refrigeration room suction duct 78, respectively. Further, the rear ends of the respective refrigerator compartment suction ducts 77 and 78 communicate with the return duct 63.

  In this case, the passage sectional area of the left refrigerator compartment suction duct 77 is formed larger than the passage sectional area of the right refrigerator compartment suction duct 78, and the suction portion 77A is also larger than the suction portion 78A (FIG. 15). ). Here, since each of the refrigerator compartment suction ducts 77 and 78 is formed around 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 the passage of the refrigerator compartment suction duct 78 on the right side. It is longer than the length.

  A narrow communication path 83 is formed between the partition wall 72 and the partition wall 69, and the front end of the ice greenhouse duct 48 and the suction portion 77 </ b> A of the refrigerating room suction duct 77 communicate with each other by the communication path 83. 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 the right side of the cooling chamber 24 is lowered downward, and the vegetable compartment duct 87 is formed inside thereof. The upper end of the vegetable compartment duct 87 communicates with the return duct 63, and the lower end is opened at the vegetable compartment outlet 88 in the upper right part of the vegetable compartment 12.

  A vegetable room suction duct 91 is formed in the lower partition wall 9, and this vegetable room suction duct 91 opens at a vegetable room suction port 92 opened in the upper surface of the back of the vegetable room 12, and the cooling room 24. It communicates with the lower end of the.

  Next, as shown in FIGS. 21 to 24, the inner partition wall 7 is composed of an upper plate 131 and a lower plate 132 made of hard resin, and the molded heat insulating material 38 inserted between the upper and lower plates 131 and 132. ing. In this case, the molded heat insulating material 38 is sandwiched between the upper and lower plates 131 and 132, and front and rear inflow holes 133 and 134 are formed by cutting the upper and lower plates 131 and 132 on the left and right side surfaces of the inner partition wall 7. Has been.

  Further, the lower plate 132 located at the rear edge of the rear inflow hole 134 is integrally formed with a claw 136 that protrudes outward (left and right direction) and then extends rearward. Further, a central raised portion 38A and left and right recessed portions 38B, 38B are formed on the upper and lower surfaces of the molded heat insulating material 38, and the raised portions 38A are in contact with the inner surfaces of the upper and lower plates 131, 132 to maintain a gap. Play a role. As a result, spaces G are formed on the left and right sides of the raised portions 38A on the inner left and right sides of the upper and lower plates 131, 132, respectively, and these spaces G ... communicate with the front and rear inflow holes 133, 134.

  Furthermore, an electric heater 119 for preventing frost formation is attached to the inner surface of the upper plate 131. In this case, the electric heater 119 is disposed so 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, a rail part 141 extending in the front-rear direction is formed on the left and right wall surfaces of the inner box 3 so as to protrude toward the outer box 2, and a rear outflow hole 144 is formed in the rear part of the rail part 141. In addition, a protruding portion 143 that protrudes further to the outer box 2 side is integrally formed at the front portion of the rail portion 141.
A front outflow hole 142 is formed in the wall surface of the outer end of the overhang portion 143.

  With the above configuration, when attaching the middle partition wall 7 to the inner box 3, the middle partition wall 7 is inserted from the front of the inner box 3 in correspondence with the rail portion 141 of the inner box 3. At this time, the claw 136 must pass through the front outflow hole 142, but the front outflow hole 142 is formed on the wall surface of the overhanging portion 143, so that it is outside the claw 136 as apparent from FIG. 23. Therefore, the claw 136 is not engaged with the front outflow hole 142 when the middle partition wall 7 is inserted, and the insertion workability is improved.

  As the intermediate partition wall 7 is further inserted, the claw 136 eventually reaches the rear outflow hole 144, passes through the hole, and protrudes toward the outer box 2 side. When the middle partition wall 7 is inserted to a predetermined position, the claw 136 is finally engaged with the rear edge of the rear outflow hole 144. In the drawing, reference numeral 146 denotes a sealing material interposed between the inner partition wall 7 and the inner box 3 so as to be positioned above and below the holes 133, 134, 142, 144.

  In this state, the inner 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 between the inner and outer boxes 3 and 2 is communicated. When the foam insulation 4 is filled between the outer box 2 and the inner box 3, the foam insulation 4 exits from the front / rear outflow holes 142, 144 and enters the space G ... through the front / rear inflow holes 133, 134. To do. Thereafter, the foam heat insulating material 4 is solidified 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 adhered to them, so that the three members are firmly fixed.

  As a result, the molded heat insulating material 38 and the foamed heat insulating material 4 are arranged side by side in the inner partition wall 7. In addition, the above structure assumes that the lower partition wall 9 has the same structure regardless of the difference in shape.

  Next, as shown in FIG. 16, the partition member 15 is attached to 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 back surface thereof. It is composed of a high-temperature refrigerant pipe 97 for preventing condensation, and the lower wall of the main body 93 has a shape in which the front portion 93A is low and the rear portion 93B is stepped.

  In addition, an engaging portion 93C is formed integrally with the rear end of the front portion 93A at a position slightly above the lower surface thereof and projecting rearward with a space below the rear portion 93B. Then, the base portion 98A of the seal member 98 is engaged and attached to the engaging portion 93C from the rear, and the soft fin piece 98B projects forward and downward.

  The soft fin piece 98B of the seal member 98 is in close contact with the rear surface of the front edge of the container 17A with the heat insulating door 17 closed. In this case, the lower surface of the base portion 98A of the seal member 98 is the main body. 93 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 is not caught and the vertical dimension of the container 17A is increased accordingly. The effective volume can be expanded.

  This structure is also formed in the other partition walls 7, 8, and 9 in the same manner. Reference numeral 104 denotes a refrigerating room temperature sensor for detecting the temperature in the refrigerating room 11, which is attached to the rear duct plate 49, and 106 is an ice greenhouse temperature sensor for detecting the temperature in the ice greenhouse 10. It is attached.

Further, a machine room 99 is formed in the lower part of the heat insulating box 6, and a compressor 101 that constitutes a well-known refrigeration cycle with the cooler 26, a condenser (not shown), and a machine room are formed in the rear part of the machine room 99. A blower is 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, and an air inlet 103 for ventilating the machine room 99 is formed in the kick plate 102. ing.

  Next, FIG. 20 shows a block diagram of an electric circuit of the control device 108 of the refrigerator 1. The control device 108 is constituted by a general-purpose microcomputer 110, which includes a freezer temperature sensor 109 for detecting the temperature in the freezer compartment 13, the refrigerating room temperature sensor 104, and the ice greenhouse temperature sensor 106. An outside air temperature sensor 111 for detecting the outside air temperature around the refrigerator 1, an ICE sensor 112 for detecting the temperature of the ice tray of the automatic ice making machine 21, a setting circuit 113 including a temperature setting volume, and the like, which will be described later The outputs of the current detection circuit 114 that detects the energization current of each motor and the door switch circuit 116 that includes a plurality of switches that detect the opening and closing of the heat insulating doors 14, 14, 16, 17, 18, and 19 are input. .

  Further, a compressor motor 101M composed of a DC motor that drives the compressor 101 is connected to the output of the microcomputer 110 via a driver 122, and a blower motor 29M composed of a DC motor that drives the blower 29 is connected via a driver 123. And a machine room blower motor 117 comprising a DC motor for driving the machine room blower is connected via a driver 124, and an ice making machine motor 21M comprising a DC motor for rotating the ice tray of the automatic ice making machine 21 is a driver. 126, a pump motor 118 comprising a DC motor for driving a pump for supplying water from the water supply tank 52 to the ice tray of the automatic ice making machine 21 is connected via a driver 127, and the motor damper 46 comprising a DC motor. The damper motor 46M is connected to the driver 128 via the driver 128. Each is connected.

  A relay circuit 129 driven by a DC power source is connected to the output of the microcomputer 110, and the relay circuit 129 is connected to the defrost heater 31, the electric heater 119 of the inner partition wall 7, and the lower partition wall 9. Electric heaters 121 for preventing frosting provided in the same manner are respectively connected.

  The operation will be described with the above configuration. 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 freezer temperature sensor 109 when the temperature in the freezer compartment 13 has reached a predetermined upper limit temperature. To do. Thus, when the compressor 101 and the blower 29 are operated, the cold 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 freezer discharge port 13A. The air is then blown into the freezer compartment 13.

  And after circulating and cooling the inside of the containers 16A and 17A in the freezer compartment 13, the cool air returns to the inside of the cooler chamber 24 from the lower freezer compartment inlets 13B, 13B, 13C and 13C. The microcomputer 110 stops the compressor motor 101M, the machine room blower motor 117, and the blower motor 29M when the temperature in the freezer compartment 13 falls to a predetermined lower limit temperature. Accordingly, the freezer compartment 13 is maintained at a set temperature (about −20 ° C.).

  Here, the cold air flowing in from the freezer compartment inlets 13B and 13B flows into the cooler 26 from the region 26A at the lower end of the cooler 26 and rises between the fins 27, but the freezer compartment inlet 13C, The cold air flowing in from 13C flows into the cooler 26 from a region 26B slightly below the central portion in the upper and lower sides of the cooler 26.

As will be described later, since the humid cold air circulated in the refrigerator compartment 11, the ice greenhouse 10, and the vegetable compartment 12 flows from the lower area 26A of the cooler 26 from the vegetable compartment suction duct 91, the cooler 26 A large amount of frost adheres and grows in the region 26A, but the cold air flowing from the freezer inlets 13C and 13C flows from above (downstream) into the sparse region 26B of the cooler 26, and then the fin density is increased. Since the air is introduced into the area below the dense blower 29, the cold air flowing from the area 26B is not hindered by the frost that has grown in the area 26A.

  Further, the fins sparse regions 26C... Are also formed on the left and right front and rear edges of the cooler 26 (outer portions of the cooler 26 where the edges of the fins 27 extending in the vertical direction in which cool air flows are located). Therefore, even if the region 26A is blocked by the growth of frost, the blockage of the frost is delayed by the amount of the region 26C.

  Accordingly, even in such a case, since cold air can be introduced into the cooler 26 from the region 26C and heat exchange can be performed, heat exchange between the fins 27 and the circulating cold air is generally maintained, and the cooling capacity of the cooler 26 is maintained. Can be significantly improved.

  Further, since the region 26C is configured on the left and right sides other than the central portion of the cooler 26 corresponding to the blower 29, the fin density in the portion where the cool air flows most in the cooler 26 is 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 cold air is maintained from the regions 26B and 26C as described above to ensure heat exchange. Will be able to.

  A part of the cold 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 then flows into the cold room rear duct 47 through the cold room baffle 43 of the motor damper 46. To do. The cold air flowing into the cold room rear duct 47 is blown into the cold room 11 from the cold room discharge port 11A, circulates inside and cools, and then, the cold room rear suction port 61 and the cold room front suction port 79, 81.

  In addition, the other part divided by the branch duct 42 flows into the ice greenhouse duct 48 through the ice greenhouse baffle 44 of the motor damper 46. The cold air flowing into the ice greenhouse duct 48 is blown into the ice greenhouse 10 from the ice greenhouse discharge port 71... Circulates inside and cools, and then flows into the ice greenhouse suction port 84.

  The microcomputer 110 drives and controls the damper motor 46M, and controls both the baffles 43 and 44 based on the temperature in the refrigerator compartment 11 and the temperature in the ice greenhouse 10 respectively output from the refrigerator temperature sensor 104 and the ice greenhouse temperature sensor 106. By driving, four types of states are created: open / open, open / closed, closed / open, and closed / closed.

  That is, the microcomputer 110 opens and closes the baffle 43 based on the output of the refrigerating room temperature sensor 104, and the inside of the refrigerating room 11 is set to about + 5 ° C. which is the set temperature of the refrigerating room 11 set by the R volume of the setting circuit 113. Maintain at refrigerated temperature. Also, the baffle 44 is opened and closed based on the output of the ice greenhouse temperature sensor 106, and the set temperature of the ice greenhouse 10 set in the H volume of the setting circuit 113 inside the container 19A in the ice greenhouse 10 is, for example, 0 ° C to Maintain in the ice temperature range of about -3 ° 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. In step S1, the microcomputer 110 determines 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, whether or not one cycle time has become smaller than an OFF time described later, that is, the remaining count time is OFF time. It is judged whether it became smaller than this.

If NO, the electric heater 119 is turned on (energized) to generate heat, and step S12.
It is determined whether or not one cycle time has become 0. If NO, the process returns to step S1 to repeat this. In step S9, one cycle time becomes shorter than the OFF time, and if YES, the process proceeds to step S10, the electric heater 119 is turned off (non-energized), and the process proceeds to step S12.

  When one cycle time becomes 0 in step S12, the process proceeds to step S13 to set one cycle time, and the process returns to step S1 and is repeated. That is, the microcomputer 110 performs so-called duty control in which the electric heater 119 is first energized within a very short cycle time, and the electric heater 119 is de-energized when the remaining time becomes shorter than the OFF time. By adjusting, the heat generation amount of the electric heater 119 can be changed as will be described later.

  Here, since the temperature of the freezer compartment 13 is lower than that of the ice greenhouse 10, the ice greenhouse 10 is affected by the temperature via the partition wall 7, and the upper surface of the upper plate 131 is frosted. Further, since the heat insulating performance of the molded heat insulating material 38 is inferior to that of the foamed heat insulating material 4, frost is more likely to be generated on the upper surface of the upper plate 131 corresponding to the raised portion 38A of the molded heat insulating material 38 than the 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, 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 the other portions. Generation can be effectively eliminated.

  On the other hand, if the set temperature of the ice greenhouse 10 is changed and there is a change in the H volume in step S1, the microcomputer 110 proceeds to step S2 to change the HVOL to the H volume minus the weak setting voltage (weak setting of the ice greenhouse). In step S3, the VOL range is set to the strong setting voltage−the weak setting voltage (strong setting and 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, + 33 ° C. or higher). Assuming that the outside air temperature is low and NO, the microcomputer 110 proceeds to step S6 to set the OFF time as 1 cycle time × (HVOL / VOL range), set the 1 cycle time in step S7, and proceed to step S9. move on. Thereafter, the same operation as described above is performed.

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

  That is, when the set temperature of the ice greenhouse 10 becomes high and the temperature difference with the freezer compartment 13 widens, the microcomputer 110 increases the amount of heat generated by the electric heater 119, and the set temperature of the ice greenhouse 10 becomes low. When the temperature difference is reduced, the microcomputer 110 reduces the amount of heat generated by the electric heater 119. This effectively eliminates frost on the upper surface of the partition wall 7 in the former state, prevents unnecessary heat generation in the latter state, reduces adverse effects on the cooling effect, and reduces power consumption. It becomes possible to plan.

If the outside air temperature is high and the temperature is + 33 ° C. or higher, the microcomputer 110 proceeds to step S5, sets the VOL range to one half, and proceeds to step S6. As a result, the OFF time calculated in step S6 is doubled. That is, when the outside air temperature is high, it is difficult for frost to form on the upper surface of the partition wall 7, so that the amount of heat generated by the electric heater 119 is reduced to further reduce power consumption.

  On the other hand, the cold air that has flowed into the after-refrigeration room suction port 61 and the ice greenhouse suction port 84 flows into the return duct 63 as it is, but the cold air that has flowed from the pre-refrigeration chamber suction ports 79 and 81 flows into the cold room suction duct 77. And 78, respectively, and flows into the return duct 63. Further, a part (small amount) of the cold air flowing into the ice greenhouse duct 48 does not pass through the ice greenhouse 10 but directly flows into the refrigerating room suction duct 77 through the communication path 83, and enters from the suction port 79. The cold air merges and flows into the return duct 63.

  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. Accordingly, since the flow path resistance of the refrigerating room suction duct 77 is larger than the flow path resistance of the refrigerating room suction duct 78 in the same passage cross-sectional area and suction area, the amount of cold air sucked from the refrigerating room front suction port 79 is refrigerated. The amount of cool air sucked from the front air inlet 81 will be smaller.

  If the amount of cold air sucked is different between the left and right sides of the refrigerator compartment 11, the cooling effect of the front part in the refrigerator compartment 11 is biased left and right, and in the embodiment, the left side is not cooled more than the right side. Since the passage cross-sectional area of the left refrigerator compartment suction duct 77 is formed larger than the passage sectional area of the right refrigerator compartment suction duct 78 and the suction portion 77A is also formed so as to be expanded from the suction portion 78A. The channel resistances 77 and 78 are substantially uniform. Therefore, the amount of cold air flowing into the refrigerator compartment front suction ports 79 and 81 is made substantially uniform, and the inside of the refrigerator compartment 11 can be uniformly cooled.

  Next, the cold air that has flowed 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 outlet 88. Then, after circulating inside the vegetable compartment 12 and indirectly cooling the inside of the container 18A, the inside of the cooling compartment 24 is sucked from the vegetable compartment 92 and passes through the inside of the vegetable compartment suction duct 91 formed in the lower partition wall 9. Return to the bottom. Then, it again flows into the region 26A of the cooler 26 as described above.

  As a result, the vegetables in the container 18A are kept at a temperature of about + 3 ° C. to + 5 ° C. in a state where drying is prevented. However, as described above, the return duct 63 has cold air from the communication passage 83, that is, Since low-temperature cold air that has not passed through the ice greenhouse 10 or the refrigerator compartment 11 (the cold air that has been cooled by the cooler 26) flows in, the load in the refrigerator compartment 11 or the ice greenhouse 10 increases temporarily. Even when the cold air temperature rises, the cooling capacity in the vegetable compartment 12 is ensured.

It is a front view of the refrigerator of this invention. It is a front view of the refrigerator of this invention except a heat insulation door. It is a front view of the refrigerator except the heat insulation door which removed the container etc. It is a vertical side view of the refrigerator of this invention. It is another vertical side view of the refrigerator of this invention. It is another vertical side view of the refrigerator of this invention. It is a perspective view of the freezer compartment of the refrigerator of this invention. It is a see-through | perspective front view of the partition plate of the freezer compartment back part of the refrigerator of this invention. It is an expansion vertical side view of the cooler lower part of the refrigerator of this invention. It is another expansion vertical side view of the cooler lower part of the refrigerator of this invention. It is a front view of the cooler of the refrigerator of this invention. It is a top view of the cooler of the refrigerator of this invention. It is a side view of the refrigerator cooler of the present invention. It is a disassembled perspective view of the upper partition wall of the refrigerator of this invention. It is a plane sectional view of the upper partition wall part of the refrigerator of the present invention. It is a vertical side view of the member before partition of the refrigerator of the present invention. It is a disassembled perspective view of the water supply tank for automatic ice makers of the refrigerator of this invention. It is a vertical side view of the water supply tank for automatic ice makers of the refrigerator of this invention. It is a vertical front view of the water supply tank for automatic ice makers of the refrigerator of this invention. It is a block diagram of the electric circuit of the control apparatus of the refrigerator of this invention. It is a perspective view of the partition wall of the refrigerator of this invention. It is a disassembled perspective view of the partition wall of the refrigerator of this invention. It is an expansion vertical front view of the partition wall side part of the refrigerator of this invention. It is a top view which shows the state attached to the inner box of the partition wall of the refrigerator of this invention. It is a flowchart which shows the program of a microcomputer.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Refrigerator 6 Heat insulation box 7 Middle partition wall 8 Upper partition wall 9 Lower partition wall 10 Ice greenhouse 11 Refrigeration room 11A Refrigeration room discharge port 12 Vegetable room 13 Freezing room 13A Freezing room discharge port 13B, 13C Freezing room suction port 24 Cooling room 26 Cooler 38 Molded heat insulating material 46 Motor damper 48 Ice greenhouse duct 63 Return duct 77, 78 Refrigerating room suction duct 79, 81 Front refrigerator door 87 Vegetable room duct 104 Refrigerating 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 inflow holes 136 Claw 142, 144 Front and rear outflow holes 143 Overhang portion

Claims (2)

By partitioning the inside of the heat insulation box with a partition wall, a first storage chamber and a second storage chamber having a higher temperature are formed, and the partition wall of the portion facing the second storage chamber is heated. In the refrigerator that is heated at
Control means for controlling the heat generation amount of the heater is provided, and this control means increases the heat generation amount of the heater when the set temperature of the second storage chamber becomes high, and A refrigerator characterized in that when the set temperature becomes low, the amount of heat generated by the heater is reduced. A sensor for detecting an outside air temperature around the refrigerator is provided, and the control means uniformly reduces the amount of heat generated by the heater when the outside air temperature is high based on the output of the sensor. 1 refrigerator.

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