JPH0735941B2 - refrigerator - Google Patents

Description

The present invention relates to a refrigerator having a plurality of storage chambers controlled to different temperatures.

(B) Conventional technology In a conventional refrigerator of this type, as in Japanese Utility Model Publication No. 62-6466, for example, a refrigerating room and a refrigerating room are divided and formed, and the compressor and the blower of the refrigerant circuit are controlled based on the temperature of the freezing room. The cool air from the blower is also supplied to the refrigerating compartment, and the damper thermostat that operates based on the temperature of the refrigerating compartment adjusts the amount of the cool air to control the temperature of both compartments to the set temperature.

(C) Problem to be Solved by the Invention In the conventional refrigerator, the control of the blower and the compressor is performed based on the temperature of the freezing compartment where the temperature is the lowest, and the temperature control of the refrigerating compartment is dependent on the temperature control of the freezing compartment. Therefore, a cold air control device such as a damper thermostat is required to control the temperature of the refrigerating room. Especially when the temperature of the freezer compartment is lower than the set temperature of the freezer compartment, it is necessary to cool the refrigerator compartment because the blower and compressor are stopped and the load of the refrigerator compartment dependent on the temperature of the freezer compartment increases. Even if the damper thermostat for the refrigerating room is opened, there is no forced convection of the cool air, so sufficient cold air cannot be supplied to the refrigerating room and the temperature of the refrigerating room cannot be easily lowered to the desired temperature. There was a problem that the temperature was likely to rise. In addition, when the outside air temperature is low, such as in winter, the freezer compartment tends to be lower than the set temperature of the freezer compartment, so the operating rate of the compressor decreases, while the temperature of the refrigerator compartment also tends to fall below the set temperature. No measures were taken to suppress the temperature drop. Further, since the damper thermostat has poor followability to temperature changes, there is a problem that the refrigerating room is likely to be overcooled and excessively heated.

On the other hand, a so-called one refrigerant circuit having a cooler for cooling the freezer compartment and two damper devices for the refrigerator compartment and the ice greenhouse so that the refrigerator compartment and the ice greenhouse are controlled depending on the temperature of the freezer compartment It was common to cool all storage rooms. Japanese Patent Application Laid-Open No. 60-194268 discloses, for example, that the blower is operated regardless of the temperature of the freezing compartment when the temperature of the ice greenhouse is higher than the preset temperature of the ice greenhouse in order to prevent overcooling of the ice greenhouse. Further, as a means for controlling a compensating heater for preventing supercooling of an ice greenhouse arranged in the ice greenhouse based on the temperature of the ice greenhouse or the outside air temperature, for example, JP-A-61-191855 and JP-A-62-59353. There is a bulletin. Further, JP-A-56-61653 discloses that the blower is operated later than the compressor based on the temperature of the cooler after completion of the defrosting operation and / or the time after completion of the defrosting operation. Japanese Utility Model Laid-Open No. 61-41585 discloses a defrosting circuit for a refrigerator that can be operated by a timer or manually.
However, in all of these prior arts, the so-called 2 with two compressors and two coolers is used.
A compressor 2 evaporator type refrigerant circuit is provided so that the freezing chamber can be cooled to a predetermined temperature (for example, a temperature of about -30 ° C) much lower than the conventional temperature (around -18 ° C), and a refrigerating chamber. It is not considered to suppress the supercooling of the refrigerating room and the excessive temperature rise without using a damper device for the refrigerator.

Therefore, in the present invention, the freezing room is kept at the conventional temperature (around -18 ° C).
To be able to cool to a predetermined temperature much lower than that (for example, a temperature of about −30 ° C.), and to suppress supercooling and excessive temperature rise of the refrigerating compartment without using a damper device for the refrigerating compartment. The purpose of the present invention is to provide a refrigerator that can be used.

(D) Means for Solving the Problems The invention according to claim 1 provides an ice greenhouse, a refrigerating compartment maintained at a temperature higher than that of the ice greenhouse, and cold air cooled by a cooler to the ice greenhouse and the refrigerating compartment. A blower for supplying and a control device for controlling the blower and the compressor based on the temperature of the ice greenhouse are provided, and the control device has a temperature equal to or lower than a predetermined temperature at which the temperature of the refrigerating compartment is lower than a set temperature of the refrigerating compartment. At this time, the set temperature of the ice greenhouse is raised.

The invention of claim 2 includes a freezer compartment, an ice greenhouse, a refrigerating compartment maintained at a temperature higher than that of the ice greenhouse, a freezer compartment cooler for cooling the freezer compartment, and a first compressor. And a second refrigerant circuit filled with a refrigerant having a boiling point higher than that of the refrigerant in the first refrigerant circuit, the refrigerant circuit including a refrigerator circuit cooler and a second compressor, and being cooled by the refrigerator room cooler. A blower that supplies the cooled air to the ice greenhouse and the refrigerating compartment, a control device that controls the second compressor and the blower based on the temperature of the ice greenhouse, and a defrost heater that defrosts the freezer cooler. And a compensating heater for heating the refrigerating compartment, wherein the controller controls the ice greenhouse while the temperature of the refrigerating compartment is equal to or lower than a predetermined temperature lower than the set temperature of the refrigerating compartment and the defrosting heater is energized. The temperature of the refrigerating compartment is equal to or lower than the predetermined temperature and Serial During deenergized defrosting heater is intended to be energized on the compensation heater.

(E) Action According to claim 1 of the present invention, when the temperature of the refrigerating compartment is equal to or lower than a predetermined temperature lower than the set temperature of the refrigerating compartment, the set temperature of the ice greenhouse for controlling the blower and the compressor is increased. Therefore, the blower and the compressor are stopped early without using the compensating heater in the refrigerating room, the power consumption is suppressed, and the supercooling of the refrigerating room is suppressed.

According to the second aspect of the present invention, in addition to eliminating the damper device for controlling the temperature of the refrigerating room and the ice greenhouse, when the temperature of the refrigerating room is equal to or lower than a predetermined temperature lower than the set temperature of the refrigerating room. , The set temperature of the ice greenhouse is automatically raised while the defrosting heater of the freezer compartment cooler of the first refrigerant circuit is energized (that is, during the defrosting of the freezer compartment). Even when the ice greenhouse is heated to a temperature higher than the normal cooling temperature by the defrost heater, cooling is started immediately to suppress an excessive temperature rise of the ice greenhouse and the refrigerating room dependent on the temperature of the ice greenhouse. Since the compensating heater is energized only when the defrosting heater is not energized, the defrosting heater and the compensating heater are not energized at the same time, and the power consumption and the temperature influence of the compensating heater on other rooms are suppressed respectively. ing.

(F) Example Next, an example will be described with reference to the drawings. FIG. 1 shows a front view of the refrigerator (1). The front opening of the refrigerator (1) is closed by a pair of double-opening doors (2), (3) and (4), (5), one at the top and one at the bottom. Is blocked. Further, a control box (7) is projected between the doors (2), (3) and (4), (5).

FIG. 2 shows a front view of the refrigerator (1) excluding the doors (2), (3), (4) and (5), and FIGS. 3 and 4 are sectional views taken along the line AA of FIG. And a cross-sectional view taken along line BB, respectively. Outer box (8) opening to the front and inner box (9) built in it
A heat insulating material (10) is filled in the space by an in-situ foaming method to form a heat insulating box (11). The inside of the heat insulating box (11) is vertically divided by a heat insulating partition wall (12) to form an upper chamber and a lower chamber which are insulated from each other and are independent from each other in the air circulation. The upper chamber is further insulated. The partition wall (13) is divided into left and right sides to form a first freezing compartment (14) and a second freezing compartment (15). A cooling chamber (17) in the vertical direction is provided on the back of the upper chamber by a partition plate (16) extending over the entire left and right width.
Is formed, the freezer compartment cooler (18) is vertically installed therein, and the main blower (19) is arranged above it and behind the partition wall (13). The partition plate (16) is formed behind the second freezer compartment (15) and has the upper and lower outlets (20) and (21), and is located behind the first freezer compartment (14). Then, a blowout port (22) is formed at the side of the partition wall (13) and an ice making blowout port (23) is formed below. Between the cooler (18) for the freezer compartment and the partition plate (16), the front of the main blower (19) and the outlet (20),
A heat insulating plate (25) is provided which forms a duct (24) that continuously links (21), (22) and (23). The main blower (19) is a propeller fan, which sucks the cold air that has rotated and exchanged heat with the freezer compartment cooler (18) and discharges it to the front duct (24), and the air outlets (20) and (21). , (22) and (23), and the cold air that has circulated through both chambers (14) and (15) is the partition wall (12).
It is sucked through the front suction port (27).

The duct (24) extends further rearward from the outlet (22), and an auxiliary blower (28) is provided at the end of the duct (24).
An auxiliary outlet (29) is formed in the partition plate (16) in front of it. Between the auxiliary blower (28) and the partition plate (16), a duct (30) communicating with the ice making outlet (23) is further formed.
The auxiliary blower (28) is a propeller fan that rotates and forcibly sucks the cold air blown from the main blower (19), and then the first refrigeration from the auxiliary blowout port (29) and the ice making blowout port (23). A large amount of cold air is blown into the chamber (14), and the first freezing chamber (14)
Do strong cooling inside.

The inside of the first freezer compartment (14) is divided into upper and lower parts by a partition plate (32) attached corresponding to the ice making outlet (23) (it is removed in FIG. 2), and the lower part thereof is made of ice. It is used as an ice-making chamber (34) that houses the plate (33). The partition plate (32) is hollow inside, and its internal space (35) communicates with the air outlet (23), and a large number of discharge ports (3) are formed on the lower surface from the back to the front.
6) is formed so that the cool air from the outlet (23) is blown from the upper portion of the lower ice tray (33) substantially uniformly. The upper surface of the partition plate (32) is used for placing frozen food.

A lower chamber below the partition wall (12) is a refrigerating chamber (38) as a second storage chamber, and an upper portion thereof is a first storage chamber by a heat insulating partition plate (39) and an inner door (40). Ice greenhouses (41)
Is formed. A cooling chamber (43) is constituted by a partition plate (42) above the refrigerating chamber (38) behind the ice greenhouse (41), and a refrigerating chamber cooler (44) is vertically installed inside the cooling chamber (43). A blower (45) is mounted above the refrigerator compartment cooler (44), and an extension (42a) extending above the ice greenhouse (41) is formed in the partition plate (42) in front of it. . A duct (47) that extends downward from both sides of the cooler (44) from the space in front of the blower (45) between the cooler (44) for the refrigerating room and the partition plate (42) and opens into the refrigerating room (38). A heat insulating plate (48) for making the is provided. The blower (45) is a propeller fan, sucks the cold air that has rotated and exchanged heat with the refrigerating chamber cooler (44), and blows it out forward to form a plurality of discharge ports (49) formed in the extending portion (42a). The cold air is blown into the ice greenhouse (41) from the room and the cold air is also supplied to the refrigerating room (38) by the duct (47). Cold air that has cooled the ice greenhouse (41) is discharged from the suction port (50) formed in the partition plate (42).
The cold air that has cooled the refrigerating chamber (38) is formed on the lower surface of the partition plate (39), extends from the partition plate (42), and flows through the suction duct (52) formed with a plurality of suction ports (51). Return to the cooling room (43).

The lower part of the refrigerating chamber (38) is further partitioned by a partition plate (53) and a partition (54), and an opening container (56) supported by a door (6) by a frame (55) is accommodated below the partition plate (53). The inside of it is called the vegetable room (57). (58) is a small container provided in the container (56). (60) is a machine room formed in the lower part of the heat insulation box (11), and a base (61) provided in the rear part of the machine room (60).
The first compressor (62) and the second compressor (6
3) are installed side by side. The first condenser (65) for the evaporating dish is located in the machine room (60) in front of both compressors (62) and (63).
Are arranged in a double structure, and the first condenser (6
4) The evaporation dish (66) is placed on top. The top wall (67) of the machine room (60) is highly inclined to accommodate the compressors (62) and (63), but the top wall (67) of the position corresponding to the first compressor (62) A recess (68) is formed.
The first compressor (62) constitutes a first refrigerant circuit including the first evaporation dish condenser (64) and the freezer compartment cooler (18), and the second compressor (63) is the second evaporation dish. A second refrigerant circuit including the cooling condenser (65) and the refrigerator compartment cooler (44).

FIG. 5 is a perspective view of the outer box (8) showing a structure for incorporating the first refrigerant circuit and the second refrigerant circuit into the heat insulating box (11). The high-temperature high-pressure refrigerant discharged from the discharge side (D ₁ ) of the first compressor (62) is the first evaporation dish condenser (6
4), radiating from inside to meander from the front to radiate heat, returning from the suction side (S ₁ ) to the first compressor (62) to cool the lubricating oil, and then again to the discharge side (D ₂ ) And flows into the condenser pipe (67) arranged on the side of the heat insulating material (10) on the front left side of the outer box (8), and then the opening edge of the outer box (8),
Partition wall (13) front, partition wall (12) front and partition (54)
After flowing into the dew condensation prevention pipe (68) continuously arranged in the front part, and further flowing through the condenser pipe (69) arranged on the front side of the heat insulating material (10) on the right side of the outer box (8), the capillary Flows through the tube (70) into the freezer compartment cooler (18),
Return from the suction pipe (71) to the suction side (S ₂ ) of the first compressor (62). This condenser pipe (67), (6
9) and the dew condensation prevention pipe (68) constitute the first condenser (73) of the first refrigerant circuit (hereinafter referred to as (72)). Refrigerant R502 (boiling point −46 ° C.) in the first refrigerant circuit (72)
Is filled, and the temperature of the freezer compartment cooler (18) can be kept at −40 ° C. or lower, so that the first and second freezer compartments (1
4) and (15) can be cooled to an extremely low temperature of -30 ° C or lower.

On the other hand, the high-temperature high-pressure refrigerant discharged from the discharge side (D ₃ ) of the second compressor (63) flows into the second evaporating dish condenser (65) and then meanders from the front side to the back side, A condenser pipe (76) that flows into the condenser pipe (75) disposed on the heat insulating material (10) side at the rear of the right side of the outer box (8) and passes through the heat insulating material (10) side at the rear edge of the outer box (8). ) Flow through the condenser pipe (77) disposed on the side of the heat insulating material (10) at the rear of the left side of the outer box (8), and then the capillary tube (78).
Through the suction pipe (79) and returns to the suction side (S ₃ ) of the second compressor (63). The condenser pipes (75), (76) and (77) form a second condenser (81) of the second refrigerant circuit (hereinafter referred to as (80)). The second refrigerant circuit (80) is filled with the refrigerant RI2 (boiling point −30 ° C.), whereby the temperature of the refrigerator compartment cooler (44) becomes about −15 ° C.
A heat insulating plate (48) is designed in advance so that a large amount of cold air is supplied to the ice greenhouse (41) from the refrigerating room (38), whereby the ice greenhouse (41) is stored at an ice temperature of -2 ° C or the like. It is possible to cool the temperature and the refrigerating chamber (38) to a refrigerating temperature such as + 6 ° C. or,
(38) and (84) are electric heaters for defrosting the freezer compartment cooler (18) and the refrigerator compartment cooler (44), respectively. Further, (85) is an electric heater as a compensating heater for compensating the temperature of the refrigerating compartment (38) provided on the side of the heat insulating material (10) of the inner box (9) for heating the interior of the refrigerating compartment (38).

Next, FIG. 6 shows a control device (93) of the refrigerator (1).
Reference numeral (94) is a microcomputer, which is a sensor (95) for detecting the temperature of the first freezing compartment (14), a sensor (96) for detecting the temperature of the second freezing compartment (15), and an ice greenhouse (41).
Input the output of the sensor (97) that detects the temperature of the room, the sensor (98) that detects the temperature of the refrigerating room (38) and the temperature setting switch (99) of the ice greenhouse (41) in the control box (7), The output of the microcomputer (94) is the first compressor (62), the second compressor (63),
It is connected to the main blower (19), the auxiliary blower (28), the blower (45), and the electric heaters (83), (84) and (85).
The microcomputer (94) has sensors (95) and (9
Based on the output of 6), the operations of the first compressor (62), the main blower (19) and the auxiliary blower (28) are controlled to cool both freezing compartments (14), (15) to the above-mentioned temperature. Also, the first
The operating time of each of the compressor (62) and the second compressor (63) is integrated to obtain the first compressor (62)
For example 12 hours, second compressor (63) for example 10
The electric heater (83) or (84) is energized for a period of time to defrost the coolers (18) and (44) respectively, and the defrosting is finished at a predetermined end temperature. Further, the set temperature of the ice greenhouse (41) can be changed by operating the setting switch (99). For example, the upper limit temperature (THH) is -1 ° C and the lower limit temperature (THL) is -3 in the normal setting.
(THH) is -2 ° C, (THL) is -4 ° C, and (THH) is 0 ° C and (THL) is -2 ° C. This 0 ℃
The temperature range from to -5 ° C is below freezing point, just before the food is frozen. By storing the food at this temperature, the growth of bacteria can be suppressed without freezing and long-term storage can be achieved.

Next, the temperature control of the ice greenhouse (41) and the refrigerating room (38) will be described based on the flowchart of the microcomputer (94) shown in FIG. In step (100), it is judged whether or not the second compressor (63) is in operation. If it is in operation, it proceeds to step (101) to judge whether the temperature (TH) of the ice greenhouse (41) is below (THL). If the following, proceed to step (102)
Stop the compressor (63). If it is stopped in step (100), the process proceeds to step (103), and it is determined whether the temperature (TH) is (THH) or higher. If it is higher, the second compressor (63) is operated in steps (104) and (105). And blowers (45)
To drive. If step (101) is negative, step (10
Go to step 4), and if step (103) is negative, go to step (10
Proceed to step 2), then in step (106) it is judged whether the blower (45) is operating, and if it is stopped, in step (107) it is judged whether the temperature (TR) of the refrigerator compartment (38) is 7 ° C or higher, for example. If so, the blower (45) is operated in step (108), and if not, the blower (45) is stopped in step (109). If the blower (45) is operating in step (106), it is determined in step (110) whether the temperature (TR) is 5 ° C. or lower, and in the following cases, the blower (45) is stopped in step (111). In that case, the blower (45) is operated in step (115). With the above, the blower (45) of the second compressor (63) is operated and controlled between the upper limit temperature (THH) and the lower limit temperature (THL) of the ice greenhouse (41), and further, only the blower (45) is The operation is controlled between 7 ° C and 5 ° C depending on the temperature (TR) of the refrigerating room (38). That is, when it is necessary to cool the refrigerating compartment (38), only the blower (45) is operated even when the second compressor (63) is stopped, and the residual cool air around the refrigerating compartment cooler (44) is kept. The refrigerating compartment (38) is cooled by circulating the water to prevent the temperature of the refrigerating compartment (38) from rising. Since the temperature (TH) of the ice greenhouse (41) also rises due to this cold air circulation, the second compressor (63) will eventually be operated.

Next, in step (113), it is determined that the electric heater (85) is energized, and when it is not energized, it is determined in step (114) whether the temperature (TR) is 1 ° C. or less, and if it is below, step (115)
To heat the refrigerator (38) by energizing the electric heater (85)
If the result is NO in step (114), the process proceeds to step (116) to turn off the electric heater (85). If the electric heater (85) is energized in step (113), the process proceeds to step (117) to determine whether the temperature (TR) is, for example, 2 ° C. or higher. De-energized,
If not, the electric heater (85) is energized in step (119). That is, the blower (45) and the second compressor (66
The operation rate of 3) is high, the temperature of the refrigerating room (38) drops abnormally, and when it reaches 1 ℃, it goes up to 2 ℃.
5) is steamed to prevent supercooling of the refrigerating room (38) and freezing of stored food. By the above operation, the ice greenhouse (41) is maintained at an average of approximately -2 ° C and the refrigerating room (38) is maintained at approximately an average of 6 ° C if set normally.

Next, FIG. 8 shows another flow chart for controlling the temperature of the ice greenhouse (41) and the refrigerating compartment (38). The steps (100) to (112) are the same as those in FIG. 7, but the means for preventing the supercooling of the refrigerating chamber (38) is different. That is, it is determined in step (120) whether the set temperature of the ice greenhouse (41) has risen. If not, the process proceeds to step (121) to determine whether the temperature (TR) is 1 ° C. or lower. 122) raise the set temperature of the ice greenhouse (41) with the setting switch (99). That is, if the setting by the set temperature switch (99) is the normal setting, the weak setting is made, and if it is the strong setting, the normal setting is made. If the set temperature has been raised in step (120), proceed to step (123),
It is judged whether the temperature (TR) is 2 ° C. or higher, and if it is higher than that, the set temperature is returned to the setting by the setting switch (99) in step (124). That is, when the temperature of the refrigerating room (38) is abnormally lowered, the set temperature of the ice greenhouse (41) is increased to reduce the operating rates of the second compressor (63) and the blower (45), and thereby the refrigerating room. The amount of cold air to (38) is reduced to prevent overcooling.

Next, FIG. 9 shows yet another flowchart for controlling the temperatures of the ice greenhouse (41) and the refrigerating room (38). The steps (100) to (112) are the same as those in FIG. 7, but the subsequent steps are different. That is, in step (125), the electric heater (8
5) determines whether the power is on, and if not, step (1)
Proceed to step 26) to determine whether the set temperature of the ice greenhouse (41) has risen as described above. If not, proceed to step (127) to see if the temperature (TR) of the refrigerator compartment (38) is 1 ° C or lower. If the judgment is negative, the electric heater (85) is de-energized in step (128). When the temperature (TR) becomes 1 ° C. or less in step (127), the process proceeds to step (129) to determine whether or not the freezer compartment cooler (18) is being defrosted, that is, the electric heater (83) is being energized. If defrosting is in progress, proceed to step (130) to turn off the electric heater (85), and in step (131) the ice greenhouse (4)
Increase the set temperature of 1) (this is the setting switch (9
If the setting in 9) is a normal setting, change it to a weak setting, and if it is a strong setting, change it to a normal setting. ). If defrosting is not in progress in step (129), the electric heater (85) is energized in step (132).

When the electric heater (85) is energized in step (125) or the set temperature is raised in step (126), the process proceeds to step (133), and it is determined whether the temperature (TR) is 2 ° C or higher, If not, proceed to step (134) to determine whether or not the freezer compartment cooler (18) is being defrosted as described above. If defrosting is in progress, proceed to step (130). Energize the electric heater (85) with 135) and step (136)
Return the set temperature of the ice greenhouse (41) to the setting of the setting switch (99). When the temperature rises to 2 ° C. or higher in step (133), the electric heater (85) is de-energized in step (137), and the set temperature of the ice greenhouse (41) is restored in step (138). That is, the temperature of the refrigerator compartment (38) drops abnormally,
Cooler (18) for freezer until it reaches 2 ℃
Prevents overcooling of the refrigerating compartment (38) by raising the set temperature of the ice greenhouse (41) during defrosting and heating the refrigerating compartment (38) by the electric heater (85) when not defrosting To do.

During defrosting of the freezer cooler (18), the electric heater (8
In addition to this, the electric heater (8)
If 5) is also heated, there is a risk that the entire amount of heat generated in the refrigerator (1) will become excessive, but in the present invention, the refrigerator (18) for the freezer compartment
During defrosting, the electric heater (85) is not heated and the ice greenhouse (4
This can be prevented by raising the set temperature of 1).

Also, both freezer compartments (14), (15) and the ice greenhouse (41) below them.
Is separated by a partition wall (12) and is insulated, but there is some heat leak. Moreover, since the temperature of both freezer compartments (14) and (15) becomes relatively high during defrosting of the freezer compartment cooler (18), in addition to this, if the electric heater (85) also generates heat, it will be temporary. However, there is a risk that the temperatures of the chambers (14), (15), (41), and (38) will become abnormally high, but the present invention also prevents this.

(G) Effect of the Invention According to claim 1 of the present invention, the freezing chamber is cooled at a conventional cooling temperature by making the boiling point of the refrigerant filled in the first refrigerant circuit lower than the boiling point of the refrigerant in the conventional refrigerant circuit. In addition to being able to cool to a lower temperature, when the temperature of the refrigerating room is below a predetermined temperature lower than the set temperature of the refrigerating room,
Since the set temperature of the ice greenhouse for controlling the blower and the compressor was raised, the fan and the compressor were stopped early without using the compensating heater of the refrigerating room, and the power consumption and the supercooling of the refrigerating room were stopped. Can be suppressed respectively.

According to the second aspect of the present invention, in addition to eliminating the damper device for controlling the temperature of the refrigerating room and the ice greenhouse, when the temperature of the refrigerating room is equal to or lower than a predetermined temperature lower than the set temperature of the refrigerating room. , The set temperature of the ice greenhouse is automatically raised while the defrosting heater of the freezer compartment cooler of the first refrigerant circuit is energized (that is, during the defrosting of the freezer compartment). Even if the ice greenhouse rises to a temperature higher than the normal cooling temperature, cooling can be started immediately to prevent an excessive temperature rise in the ice greenhouse and the refrigerating compartment dependent on the temperature of the ice greenhouse, and food stored in both compartments can be suppressed. It is possible to suppress the resale and quality deterioration. Since the compensating heater is energized only when the defrosting heater is not energized, the defrosting heater and the compensating heater are not energized at the same time, and the power consumption and the temperature influence on the other room due to the compensating heater are suppressed, An increase in the running cost of the refrigerator can be suppressed.

[Brief description of drawings]

1 is a front view of the refrigerator, FIG. 2 is a front view of the refrigerator with some doors removed, and FIGS. 3 and 4 are AA of FIG. 2, respectively.
A line sectional view and a BB line sectional view, FIG. 5 is a perspective view of an outer box,
FIG. 6 is an electric circuit diagram of the control device, and FIGS. 7 to 9 are flowcharts showing the software of the microcomputer. (1) …… Refrigerator, (12) …… Partition wall, (14) …… First
Freezer, (15) …… second freezer, (18) …… cooler for freezer, (38) …… refrigerator, (41) …… ice greenhouse, (4
4) …… Refrigerator for refrigerators, (83), (84), (85) ……
Electric heater, (93) ... Control device.

Front page continuation (72) Kenjiro Hara, 2-18, Keihan Hondori, Moriguchi City, Osaka Prefecture Sanyo Electric Co., Ltd. (72) Inventor: Tokio Hotta 2--18, Keihan Hondori, Moriguchi City, Osaka Sanyo Electric Co., Ltd. (56) References

Claims (2)

[Claims] 1. An ice greenhouse, a refrigerating compartment maintained at a temperature higher than that of the ice greenhouse, a blower for supplying cold air cooled by a cooler to the ice greenhouse and the refrigerating compartment, and a temperature controller for the ice greenhouse. A controller for controlling the blower and the compressor, wherein the controller raises the set temperature of the ice greenhouse when the temperature of the refrigerating compartment is equal to or lower than a predetermined temperature lower than the set temperature of the refrigerating compartment. And a refrigerator. 2. A first refrigerant including a freezer compartment, an ice greenhouse, a refrigerating compartment maintained at a temperature higher than that of the ice greenhouse, a freezer compartment cooler for cooling the freezer compartment, and a first compressor. Circuit,
A second refrigerant circuit, which includes a refrigerating compartment cooler and a second compressor, and is filled with a refrigerant having a higher boiling point than the refrigerant in the first refrigerant circuit, and cold air cooled by the refrigerating compartment cooler in an ice greenhouse And a blower for supplying to the refrigerating compartment, a control device for controlling the second compressor and the blower based on the temperature of the ice greenhouse, a defrosting heater for defrosting the freezer compartment cooler, and the refrigerating compartment Compensation heater for heating the, the control device, the temperature of the refrigerating compartment is lower than a predetermined temperature lower than the set temperature of the refrigerating compartment and raises the set temperature of the ice greenhouse while the defrost heater is energized. The refrigerator is characterized in that the compensation heater is energized while the temperature of the refrigerating compartment is equal to or lower than the predetermined temperature and the defrosting heater is not energized.