JP6168980B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator including a switching chamber.

  Conventionally, refrigerators having a plurality of storage rooms have been commercialized as refrigerators having a large-capacity refrigerator compartment, a freezer compartment and a vegetable compartment, and a small-capacity ice making room. Moreover, in patent document 1 and patent document 2, in addition to a refrigeration room, a freezing room, and a vegetable room with a large capacity, and an ice making room with a small capacity, the internal temperature is switched from a refrigeration temperature zone to a freezing temperature zone. A refrigerator including a switching chamber having a small capacity is disclosed.

Japanese Patent No. 3212954 (page 5) JP 2001-33144 A (second page)

  However, in recent years, lifestyles differ depending on the user, and in particular, foods are frequently stored in the freezer in the summer, so that there is a shortage of freezer capacity in hot weather such as this summer. An increasing number of families are concerned. The needs for refrigerators also change depending on the environment of the area where you live. Furthermore, in order to make up for the lack of capacity of the freezer compartment, the refrigerator as disclosed in Patent Literature 1 and Patent Literature 2 has a small capacity of the switching chamber, even if the switching chamber is set to the freezing temperature zone and used. It is insufficient to make up for the lack of freezer capacity.

  Further, in these Patent Documents 1 and 2, since the capacity of the switching chamber is small and the temperature variation in the switching chamber is small, strict temperature management is not necessary. However, when the capacity of the switching chamber is increased, the temperature variation in the switching chamber is increased accordingly, so that precise temperature control is required.

  The present invention has been made against the background of the above problems, and provides a refrigerator capable of appropriately managing the temperature inside the switching chamber even when the capacity of the switching chamber is increased.

The refrigerator according to the present invention includes a refrigerant circuit in which a compressor, a condenser, an expansion device, and a cooler are connected by piping, the refrigerant flows, a refrigerating room in which the internal temperature is set in a refrigerating temperature zone, and a refrigerating room Provided in the lower stage, the freezing room in which the internal temperature is set to a refrigeration temperature zone lower than the refrigeration temperature zone and a freezing opening for introducing the air cooled by the cooler is formed, and the lower stage is provided The internal temperature is set to be switchable in the range from the refrigeration temperature zone to the freezing temperature zone, and the switching chamber is formed with a switching opening for introducing the air cooled by the cooler, and the refrigeration chamber, the freezing chamber or the switching A control unit that controls the temperature inside the chamber to a predetermined temperature, and a refrigeration temperature detection unit that detects the temperature inside the freezing chamber, and the control unit is set for the switching chamber Switching to determine whether the target switching room temperature is in the refrigeration temperature zone And a switching control means for causing the internal temperature of the switching chamber to reach the target switching chamber temperature when the switching determination means determines that the target switching chamber temperature is in the freezing temperature zone. The determining means determines whether the target switching chamber temperature is a freezing temperature zone, a refrigeration temperature zone, or a soft freezing temperature zone between the freezing temperature zone and the refrigeration temperature zone, and the operation control means is a refrigeration temperature zone. internal temperature of the detected freezer compartment temperature detector, and, based on temperature zone is determined by the switching determination unit target switching compartment temperature, and have a compressor control means for controlling the operation of the compressor, switching The chamber is provided with an upper wall heater and a lower wall heater that adjust the temperature of the switching chamber.

  According to the present invention, the control unit controls the temperature inside the switching chamber to a predetermined temperature. For this reason, even if the capacity | capacitance of a switching chamber is enlarged, the temperature inside the switching chamber can be managed appropriately.

1 is a front view showing a refrigerator 1 according to Embodiment 1. FIG. 2 is a front sectional view showing a freezer compartment 30 according to Embodiment 1. FIG. FIG. 3 is a front cross-sectional view showing a switching chamber 40 in the first embodiment. It is side surface sectional drawing which shows the refrigerator 1 which concerns on Embodiment 1, and is AA sectional drawing of FIG. 2 is a side cross-sectional view showing a freezer compartment 30 and a switching compartment 40 according to Embodiment 1. FIG. 2 is a block diagram showing a control unit 10 in Embodiment 1. FIG. 3 is a flowchart showing the operation of the refrigerator 1 according to the first embodiment. 6 is a block diagram illustrating a control unit 110 according to Embodiment 2. FIG. It is a flowchart which shows operation | movement of the refrigerator 100 which concerns on Embodiment 2. FIG. FIG. 10 is a block diagram illustrating a control unit 210 according to Embodiment 3. 10 is a flowchart showing the operation of the refrigerator 200 according to Embodiment 3. It is a front view which shows the refrigerator 300 which concerns on a modification.

  Hereinafter, embodiments of a refrigerator according to the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments described below. Moreover, in the following drawings including FIG. 1, the relationship of the size of each component may be different from the actual one.

Embodiment 1 FIG.
FIG. 1 is a front view showing a refrigerator 1 according to the first embodiment. The refrigerator 1 is demonstrated based on this FIG. As shown in FIG. 1, the refrigerator 1 includes a refrigerating room 20, a freezing room 30, a switching room 40, an ice making room 50, and a sub switching room 60. The refrigerator compartment 20 is installed in the uppermost stage in the storage compartment of the refrigerator 1, and the internal temperature is set to the refrigerator temperature zone. This refrigeration temperature zone is, for example, 0 ° C. or higher.

  In the lower stage of the refrigerator compartment 20, an ice making room 50 and a sub switching room 60 are installed in parallel in the width direction (arrow X direction) of the refrigerator 1. Of these, the ice making chamber 50 stores ice and includes a drawer door. Further, the sub switching chamber 60 has a freezing temperature zone (−18 ° C. or lower), a soft freezing temperature (−7 ° C.), a chilled temperature (0 ° C.), a refrigerating temperature in which the internal temperature is lower than the refrigerating temperature zone. It is set to be freely switchable to each temperature such as (5 ° C.). Similar to the ice making chamber 50, the sub switching chamber 60 also includes a drawer door.

  The freezing room 30 is installed in the lower stage of the ice making room 50 and the sub switching room 60, and the internal temperature of this freezing room 30 is set to a freezing temperature zone (−18 ° C. or lower). FIG. 2 is a front sectional view showing the freezer compartment 30 according to the first embodiment. As shown in FIG. 2, the freezer compartment 30 is provided with a freezing temperature detector 31 on its inner wall, for example. This freezing temperature detection part 31 detects the temperature inside the freezer compartment 30, and is comprised by the thermistor, for example.

  Further, a refrigeration opening 32 is provided in the vicinity of the refrigeration temperature detection unit 31, and the refrigeration opening 32 introduces cold air from the air passage 2 formed behind the freezer compartment 30. . In the freezer compartment 30, the freezing temperature detection part 31 is installed in the position where the cold air introduce | transduced from the freezing opening part 32 does not hit directly. For example, the refrigeration temperature detector 31 and the refrigeration opening 32 are not directly adjacent to each other in the width direction (arrow X direction) and the height direction (arrow Z direction) of the refrigerator 1. That is, for example, a partition plate is provided in the refrigeration opening 32, and the refrigeration temperature detection unit 31 and the refrigeration opening 32 are adjacent to each other through the partition plate. A plurality of the freezing openings 32 may be formed.

  And as shown in FIG. 1, the switching room 40 is installed in the lower stage of the freezer compartment 30, and the lowest stage in the storage room of the refrigerator 1. As shown in FIG. The switching chamber 40 is set so that the internal temperature can be freely switched between a freezing temperature range (−18 ° C. or less), a soft freezing temperature (−7 ° C.), and a refrigeration temperature (5 ° C.). The capacity is larger than the chamber 60. FIG. 3 is a front sectional view showing the switching chamber 40 in the first embodiment. As shown in FIG. 3, the switching chamber 40 is provided with a switching temperature detector 41 on the inner wall, for example. This switching temperature detection part 41 is comprised, for example with the thermistor, and detects the temperature inside the switching chamber 40. FIG.

  In addition, two switching openings 42 are provided in the vicinity of the switching temperature detector 41, and the switching openings 42 introduce cool air from the air passage 2 formed behind the switching chamber 40. It is. Note that the switching chamber 40 allows not only the freezing temperature zone but also the refrigeration temperature zone higher than the freezing temperature zone, so that it is not necessary to introduce cold air as the freezing room 30. For this reason, the switching opening 42 has an opening area smaller than that of the freezing opening 32 even when two opening areas are added.

  In the switching chamber 40, the switching temperature detection part 41 is installed in the position where the cold air introduce | transduced from the switching opening part 42 does not hit directly. For example, the switching temperature detector 41 and the switching opening 42 are not directly adjacent to each other in the width direction (arrow X direction) and the height direction (arrow Z direction) of the refrigerator 1. That is, for example, a partition plate is provided in the switching opening 42, and the switching temperature detection unit 41 and the switching opening 42 are adjacent to each other through the partition plate. The switching chamber 40 may be set so that the internal temperature can be switched in the range from the refrigeration temperature range (0 ° C. or higher) to the freezing temperature range. Further, the number of switching openings 42 may be one, or three or more.

  The capacity of each storage room is the largest in the refrigerated room 20, decreases in the order of the freezer room 30, the switching room 40, and the sub switching room 60, and the ice making room 50 is the smallest. The length in the width direction in the switching chamber 40 is the same as the length in the width direction in the freezer compartment 30 and the refrigerator compartment 20. Further, in the refrigerator 1, the ice making chamber 50 and the auxiliary switching chamber 60 may be omitted. In this case, the refrigerator 1 includes a refrigerating room 20, a freezing room 30 provided in the lower stage of the refrigerating room 20, and a switching room 40 provided in the lower stage of the freezing room 30.

  4 is a side cross-sectional view showing the refrigerator 1 according to Embodiment 1, and is a cross-sectional view taken along the line AA of FIG. As shown in FIG. 4, a compressor 71 that compresses the refrigerant is installed at the bottom and rear of the refrigerator 1. An air passage 2 through which cool air flows is formed behind the refrigerating chamber 20, the sub switching chamber 60, the freezing chamber 30, and the switching chamber 40, and a cooler 74 is provided below the air passage 2. It has been. The cooler 74 is connected to the compressor 71, the condenser 72, and the expansion device 73 by piping, and thereby, a refrigerant circuit 70 through which the refrigerant flows is configured.

  In the refrigerant circuit 70, the refrigerant discharged from the compressor 71 flows to the condenser 72. Then, in the condenser 72, heat is exchanged between the refrigerant and air, and the refrigerant is condensed. This condensed refrigerant flows through the expansion device 73 and is expanded. Then, the expanded refrigerant flows through the cooler 74, exchanges heat with the air in the air path 2, and cools the air in the air path 2 and evaporates the refrigerant. Then, the evaporated refrigerant is sucked into the compressor 71 again. Here, the air cooled by the cooler 74 flows through the air passage 2 of the refrigerator 1 and flows into each storage room.

  In the air passage 2, a blower 90 is provided above the cooler 74, and the blower 90 blows air to the freezer compartment 30 and the switching chamber 40. The blowing direction of the blower 90 is directed to the freezer compartment 30, for example. In addition, the refrigerator 1 is provided with a control unit 10, and the control unit 10 controls the internal temperatures of the refrigeration room 20, the freezing room 30, the switching room 40, and the like to predetermined temperatures.

  FIG. 5 is a side sectional view showing the freezer compartment 30 and the switching chamber 40 according to the first embodiment. As shown in FIG. 5, the switching chamber 40 and the air passage 2 are separated by a damper 91, and the damper 91 is opened and closed to adjust the amount of cool air from the blower 90 flowing into the switching chamber 40. Thus, the temperature of the switching chamber 40 is adjusted. Furthermore, an upper wall heater 80a and a lower wall heater 80b are provided on the rear portion of the upper wall and the lower wall of the switching chamber 40, respectively. The upper wall heater 80a and the lower wall heater 80b adjust the temperature of the switching chamber 40.

  When the temperature inside the switching chamber 40 is set to a refrigeration temperature zone or the like that is higher than the freezing temperature zone, the temperature inside the switching chamber 40 may decrease excessively due to the cold air introduced from the air passage 2. is there. The upper wall heater 80a and the lower wall heater 80b raise the temperature inside the switching chamber 40, which has been excessively lowered, to an appropriate temperature. Since the air passage 2 is formed behind the switching chamber 40, the rear of the switching chamber 40 is more easily cooled than the front. For this reason, the upper wall heater 80 a and the lower wall heater 80 b are installed behind the switching chamber 40. Note that one heater may be provided, or three or more heaters may be provided.

  Each storage room may be provided with temperature detection means, a damper, and a heater. In this case, the temperature of each storage room is detected by the temperature detection means installed in each storage room and set in each storage room. The operating speed of the compressor 71, the air flow rate of the blower 90, the opening degree of the damper, the energization rate of the heater, and the like are adjusted so as to reach the set target temperature.

  FIG. 6 is a block diagram illustrating the control unit 10 according to the first embodiment. The control unit 10 normally controls the operating speed or operating frequency of the compressor 71 based on the temperature inside the freezer compartment 30 detected by the freezing temperature detecting unit 31. As shown in FIG. 6, the control unit 10 includes a switching determination unit 11 and an operation control unit 12.

  The switching determination means 11 determines whether or not the target switching chamber temperature TS set in the switching chamber 40 is in the freezing temperature zone. Further, the operation control means 12 is for causing the temperature inside the switching chamber 40 to reach the target switching chamber temperature TS, and includes a target freezer compartment temperature lowering means 12a. This target freezer compartment temperature lowering means 12a lowers the target freezer compartment temperature TF set in the freezer compartment 30 when the switch judging means 11 judges that the target switching room temperature TS is in the freezing temperature zone. It is. Then, the target freezer compartment temperature lowering means 12a controls the compressor 71 so that the temperature inside the freezer compartment 30 reaches the target freezer compartment temperature TF. For example, when the target freezer compartment temperature TF of the freezer compartment 30 in normal operation is set to −18 ° C., the temperature is lowered to −20 ° C. Thus, in the first embodiment, the target freezer compartment temperature lowering means 12a performs the downshift control.

  Next, operation | movement of the refrigerator 1 in this Embodiment 1 is demonstrated. FIG. 7 is a flowchart showing the operation of the refrigerator 1 according to the first embodiment. As shown in FIG. 7, the control unit 10 controls the compressor 71 based on the temperature of the freezer compartment 30 (step S1). Specifically, the control unit 10 compares the temperature of the freezer compartment 30 with the target freezer compartment temperature TF, and controls the compressor 71 to fill the difference. And it is determined by the switching determination means 11 whether the target switching chamber temperature TS is a freezing temperature zone (step S2).

  If it is determined in step S2 that the target switching chamber temperature TS is in a refrigeration temperature zone, for example, 5 ° C., the process proceeds to step S3. When the temperature inside the switching chamber 40 is higher than the target switching chamber temperature TS, the damper 91 is half-opened. When the temperature inside the switching chamber 40 is lower than the target switching chamber temperature TS, the damper 91 is fully closed. (Step S3). When the temperature inside the switching chamber 40 is lower than the target switching chamber temperature TS, the temperature is adjusted by using the upper wall heater 80a and the lower wall heater 80b in addition to fully closing the damper 91 ( Step S4). Thereafter, the operation is continued.

  On the other hand, when it is determined in step S2 that the target switching chamber temperature TS is in the soft freezing temperature zone that is a temperature zone between the freezing temperature zone and the refrigeration temperature zone, for example, −7 ° C., the process proceeds to step S5. When the temperature inside the switching chamber 40 is higher than the target switching chamber temperature TS, the damper 91 is half-opened. When the temperature inside the switching chamber 40 is lower than the target switching chamber temperature TS, the damper 91 is fully closed. (Step S5). When the temperature inside the switching chamber 40 is lower than the target switching chamber temperature TS, the temperature is adjusted by using the upper wall heater 80a and the lower wall heater 80b in addition to fully closing the damper 91 ( Step S6). Thereafter, the operation is continued. Step S5 and step S6 are the same as step S3 and step S4.

  If it is determined in step S2 that the target switching chamber temperature TS is in the freezing temperature zone, for example, -18 ° C, the process proceeds to step S7. In step S7, the target freezer compartment temperature lowering means 12a lowers the target freezer compartment temperature TF set in the freezer compartment 30. Then, the damper 91 is fully opened, and the cool air is taken in from the switching opening 42 to the maximum extent (step S8). Thereafter, the operation is continued.

  Thus, the control part 10 in this Embodiment 1 controls the temperature inside the refrigerator compartment 20, the freezer compartment 30, or the switching chamber 40 to predetermined temperature. For this reason, even if the capacity | capacitance of the switching chamber 40 is enlarged, the temperature inside the switching chamber 40 can be managed appropriately. Thereby, the refrigerator 1 suitable for a user's life style is realizable.

  In the first embodiment, the refrigerator compartment 20, the freezer compartment 30, and the switching compartment 40 are arranged in this order from the upper stage of the refrigerator 1, and the ice making room 50 is provided between the refrigerator compartment 20 and the freezer compartment 30. And the sub switching room 60 is arrange | positioned. Therefore, when the target switching chamber temperature TS of the switching chamber 40 is in the refrigeration temperature zone, all the storage chambers are set to a temperature lower than the refrigeration temperature zone except for the uppermost refrigeration chamber 20. Thus, when the target switching chamber temperature TS of the switching chamber 40 is in the freezing temperature zone, the upper refrigerator compartment 20 and the cooler storage chamber are partitioned. For this reason, what is necessary is just to provide the heat insulating material used for the refrigerator 1 between the refrigerator compartment 20, the ice making room 50, and the subswitching room 60 where the temperature range was divided, and the heat insulating material in the refrigerator 1 whole is sufficient. The amount used can be reduced.

  When the target switching chamber temperature TS is in the freezing temperature zone, the target freezing chamber temperature lowering means 12a decreases the target freezing chamber temperature TF set in the freezing chamber 30. As described above, the switching chamber 40 allows not only the refrigeration temperature zone but also a refrigeration temperature zone higher than the refrigeration temperature zone, so that the switching opening 42 is narrow and is harder to cool than the freezer compartment 30. For this reason, when the target freezer compartment temperature TF of the freezer compartment 30 and the target freezer compartment temperature TS of the switching compartment 40 are the same, even if the freezer compartment 30 reaches the target freezer compartment temperature TF, the switching compartment 40 is the target switching compartment. There is a risk of not reaching the temperature TS.

  On the other hand, in this Embodiment 1, since the target freezer compartment temperature lowering means 12a lowers the target freezer compartment temperature TF set in the freezer compartment 30, the target freezer compartment temperature TF of the freezer compartment 30 is It is higher than the target switching chamber temperature TS of the switching chamber 40. For this reason, the freezer compartment 30 reaches the target freezer compartment temperature TF, and the switching compartment 40 also reaches the target switching compartment temperature TS. As described above, the first embodiment can appropriately control the temperature inside the switching chamber 40. In addition, although the temperature in the freezer compartment 30 is cooled more than usual because the target freezer compartment temperature TF is lowered, there is a problem even when the temperature inside the freezer compartment 30 is lowered in freezing food. There is no.

Embodiment 2. FIG.
Next, the refrigerator 100 according to the second embodiment will be described. FIG. 8 is a block diagram illustrating the control unit 110 according to the second embodiment. The second embodiment is different from the first embodiment in that the operation control unit 112 includes a control target detection unit changing unit 112a. In the second embodiment, portions common to the first embodiment are denoted by the same reference numerals, description thereof is omitted, and differences from the first embodiment will be mainly described.

  As shown in FIG. 8, the operation control unit 112 includes a control target detection unit changing unit 112a. When the switching determination unit 11 determines that the target switching chamber temperature TS is in the refrigeration temperature zone, the control target detection unit changing unit 112a uses the temperature inside the freezing chamber 30 detected by the refrigeration temperature detection unit 31. Rather, the operation of the compressor 71 is controlled based on the temperature inside the switching chamber 40 detected by the switching temperature detector 41. As described above, the control target detection unit changing unit 112 a changes the temperature detection unit used for controlling the compressor 71 from the refrigeration temperature detection unit 31 to the switching temperature detection unit 41.

  Next, the operation of the refrigerator 100 in the second embodiment will be described. FIG. 9 is a flowchart showing the operation of the refrigerator 100 according to the second embodiment. As shown in FIG. 9, the control unit 110 controls the compressor 71 based on the temperature of the freezer compartment 30 (step S11). Specifically, the control part 110 compares the temperature of the freezer compartment 30 with the target freezer compartment temperature TF, and controls the compressor 71 so that the difference may be filled. And it is determined by the switching determination means 11 whether the target switching chamber temperature TS is a freezing temperature zone (step S12).

  In step S12, when it is determined that the target switching chamber temperature TS is in a refrigeration temperature zone, for example, 5 ° C., the process proceeds to step S13. When the temperature inside the switching chamber 40 is higher than the target switching chamber temperature TS, the damper 91 is half-opened. When the temperature inside the switching chamber 40 is lower than the target switching chamber temperature TS, the damper 91 is fully closed. (Step S13). When the temperature inside the switching chamber 40 is lower than the target switching chamber temperature TS, the temperature is adjusted by using the upper wall heater 80a and the lower wall heater 80b in addition to fully closing the damper 91 ( Step S14). Thereafter, the operation is continued. Step S13 and step S14 are the same as step S3 and step S4 in the first embodiment.

  On the other hand, when it is determined in step S12 that the target switching chamber temperature TS is in the soft freezing temperature zone, for example, -7 ° C, the process proceeds to step S15. When the temperature inside the switching chamber 40 is higher than the target switching chamber temperature TS, the damper 91 is half-opened. When the temperature inside the switching chamber 40 is lower than the target switching chamber temperature TS, the damper 91 is fully closed. (Step S15). When the temperature inside the switching chamber 40 is lower than the target switching chamber temperature TS, the temperature is adjusted by using the upper wall heater 80a and the lower wall heater 80b in addition to fully closing the damper 91 ( Step S16). Thereafter, the operation is continued. Step S15 and step S16 are the same as step S13 and step S14.

  In step S12, when it is determined that the target switching chamber temperature TS is in the freezing temperature zone, for example, −18 ° C., the process proceeds to step S17. In step S <b> 17, the control of the compressor 71 based on the temperature inside the freezer compartment 30 detected by the refrigeration temperature detector 31 is interrupted by the controller 110. And the control object detection part change means 112a controls operation | movement of the compressor 71 based on the temperature inside the switching chamber 40 detected by the switching temperature detection part 41 (step S18). Then, the damper 91 is fully opened, and the cool air is taken in from the switching opening 42 to the maximum extent (step S19). Thereafter, the operation is continued.

  As described above, in the second embodiment, the control target detection unit changing unit 112a controls the operation of the compressor 71 based on the temperature inside the switching chamber 40 detected by the switching temperature detection unit 41. As described in the first embodiment, when the target freezer temperature TF of the freezer 30 and the target switching chamber temperature TS of the switching chamber 40 are the same, even if the freezer 30 reaches the target freezer temperature TF, The switching chamber 40 may not reach the target switching chamber temperature TS.

  In the second embodiment, the control target detection unit changing unit 112a controls the operation of the compressor 71 based on the temperature inside the switching chamber 40 detected by the switching temperature detection unit 41. The internal temperature can be appropriately reached to the target switching chamber temperature TS. In addition, since the switching chamber 40 is appropriately cooled in this way, the temperature inside the freezer compartment 30 is cooled slightly more than the target freezer compartment temperature TF. There is no problem even if the internal temperature of the is lowered.

Embodiment 3 FIG.
Next, the refrigerator 200 according to the third embodiment will be described. FIG. 10 is a block diagram showing control unit 210 in the third embodiment. The third embodiment is different from the first embodiment in that the operation control means 212 includes a compressor control means 212a. In the third embodiment, portions common to the first embodiment are denoted by the same reference numerals, description thereof is omitted, and differences from the first embodiment will be mainly described.

  As shown in FIG. 10, the operation control unit 212 includes a compressor control unit 212a. This compressor control means 212a is based on the temperature inside the freezer compartment 30 detected by the refrigerating temperature detector 31 and the temperature zone of the target switching chamber temperature TS determined by the switching determination means 11. It controls the operation.

  Next, the operation of the refrigerator 200 in the third embodiment will be described. FIG. 11 is a flowchart showing the operation of the refrigerator 200 according to the third embodiment. As shown in FIG. 11, the control unit 210 controls the compressor 71 based on the temperature of the freezer compartment 30 (step S21). Specifically, the control unit 210 compares the temperature of the freezer compartment 30 with the target freezer compartment temperature TF, and controls the compressor 71 to fill the difference. And it is determined by the switching determination means 11 whether the target switching chamber temperature TS is a freezing temperature zone, a refrigerating temperature zone, or a soft freezing temperature zone (step S22).

  If it is determined in step S22 that the target switching chamber temperature TS is in a refrigeration temperature zone, for example, 5 ° C., the process proceeds to step S23. In step S23, the compressor control unit 212a performs compression based on the temperature zone of the target switching chamber temperature TS determined by the switching determination unit 11, that is, the refrigeration temperature zone, in addition to the temperature inside the freezer compartment 30. The operation speed of the machine 71 is controlled.

  When the temperature inside the switching chamber 40 is higher than the target switching chamber temperature TS, the damper 91 is half-opened. When the temperature inside the switching chamber 40 is lower than the target switching chamber temperature TS, the damper 91 is fully closed. (Step S24). When the temperature inside the switching chamber 40 is lower than the target switching chamber temperature TS, the temperature is adjusted by using the upper wall heater 80a and the lower wall heater 80b in addition to fully closing the damper 91 ( Step S25). Thereafter, the operation is continued. Step S24 and step S25 are the same as step S3 and step S4 in the first embodiment.

  On the other hand, when it is determined in step S22 that the target switching chamber temperature TS is in the soft freezing temperature zone, for example, -7 ° C, the process proceeds to step S26. In step S26, the compressor control means 212a is based on the temperature zone of the target switching chamber temperature TS determined by the switching determination means 11, that is, the soft refrigeration temperature zone, in addition to the temperature inside the freezer compartment 30. The operation speed of the compressor 71 is controlled.

  When the temperature inside the switching chamber 40 is higher than the target switching chamber temperature TS, the damper 91 is half-opened. When the temperature inside the switching chamber 40 is lower than the target switching chamber temperature TS, the damper 91 is fully closed. (Step S27). When the temperature inside the switching chamber 40 is lower than the target switching chamber temperature TS, the temperature is adjusted by using the upper wall heater 80a and the lower wall heater 80b in addition to fully closing the damper 91 ( Step S28). Thereafter, the operation is continued. Step S27 and step S28 are the same as step S24 and step S25.

  If it is determined in step S22 that the target switching chamber temperature TS is in the freezing temperature zone, for example, -18 ° C, the process proceeds to step S29. In step S29, the compressor control unit 212a performs compression based on the temperature zone of the target switching chamber temperature TS determined by the switching determination unit 11, that is, the refrigeration temperature zone, in addition to the temperature inside the freezing chamber 30. The operation speed of the machine 71 is controlled. Then, the damper 91 is fully opened, and the cool air is taken in from the switching opening 42 to the maximum extent (step S30). Thereafter, the operation is continued.

  As described above, in the third embodiment, the compressor control means 212a is configured so that the internal temperature of the freezer compartment 30 detected by the freezing temperature detection unit 31 and the target switching room temperature TS determined by the switching determination means 11. Based on this temperature range, the operation of the compressor 71 is controlled. For this reason, even if the target switching chamber temperature TS of the switching chamber 40 is set to any temperature zone, it can control appropriately to a corresponding temperature zone.

  The present invention is not limited to the above embodiment. FIG. 12 is a front view showing a refrigerator 300 according to a modification. As shown in FIG. 12, in the storage room of the refrigerator 300, a soft freezer room 360 may be provided instead of the auxiliary switching room 60. In this case, the soft freezing temperature of the soft freezer compartment 360 is, for example, −7 ° C.

  DESCRIPTION OF SYMBOLS 1 Refrigerator, 2 air paths, 10 Control part, 11 Switching determination means, 12 Operation control means, 12a Target freezer temperature fall means, 20 Refrigeration room, 30 Freezing room, 31 Freezing temperature detection part, 32 Freezing opening part, 40 Switching Chamber, 41 switching temperature detection unit, 42 switching opening, 5 ice making chamber, 60 sub switching chamber, 70 refrigerant circuit, 71 compressor, 72 condenser, 73 expansion device, 74 cooler, 80a upper wall heater, 80b lower wall Heater, 90 blower, 91 damper, 100 refrigerator, 110 control unit, 112 operation control unit, 112a control target detection unit changing unit, 200 refrigerator, 210 control unit, 212 operation control unit, 212a compressor control unit, 300 refrigerator, 360 Soft freezer room, TF target freezer room temperature, TS target switching room temperature.

Claims (5)

A refrigerant circuit in which a compressor, a condenser, an expansion device, and a cooler are connected by piping, and the refrigerant flows;
A refrigerating room whose internal temperature is set to a refrigerating temperature zone;
A freezer compartment provided in a lower stage of the refrigerating compartment, wherein the internal temperature is set to a refrigerating temperature zone lower than the refrigerating temperature zone, and a freezing opening for introducing air cooled by the cooler is formed;
Provided in the lower stage of the freezer compartment, the internal temperature is set to be freely switchable in the range from the refrigeration temperature zone to the freezing temperature zone, and a switching opening for introducing the air cooled by the cooler is formed A switching room,
A controller that controls the temperature inside the refrigerator compartment, the freezer compartment, or the switching chamber to a predetermined temperature;
A freezing temperature detection unit for detecting the temperature inside the freezer,
The controller is
Switching determination means for determining whether or not the target switching chamber temperature set for the switching chamber is a refrigeration temperature zone;
When the switching determination unit determines that the target switching chamber temperature is in a refrigeration temperature zone, an operation control unit that causes the temperature inside the switching chamber to reach the target switching chamber temperature, and
The switching determination means includes
Whether the target switching chamber temperature is a refrigeration temperature zone, a refrigeration temperature zone or a soft refrigeration temperature zone between a refrigeration temperature zone and a refrigeration temperature zone,
The operation control means includes
Compressor control for controlling the operation of the compressor based on the temperature inside the freezer compartment detected by the freezing temperature detector and the temperature zone of the target switching chamber temperature determined by the switching determination means have a means,
The refrigerator , wherein the switching chamber is provided with an upper wall heater and a lower wall heater that adjust the temperature of the switching chamber . Behind the refrigerator compartment, the freezer compartment and the switching chamber, an air passage through which cold air flows is formed,
The cooler is
Arranged below the air passage,
The refrigerator according to claim 1, wherein a blower having a blowing direction directed to the freezer compartment is provided above the cooler in the air passage. A blower for blowing air to the refrigerator compartment, the freezer compartment and the switching chamber;
By adjusting the air volume of the blower flows into the switching chamber, a refrigerator according to claim 1 or 2, further comprising a damper for adjusting the temperature of the switching chamber. Internal temperature switch freely set in the range up to the freezing temperature zone from the refrigerating temperature zone, claim 1-3, characterized by further comprising a sub switching chamber capacity is less than the switching chamber The refrigerator according to item 1. The length in the width direction in the switching chamber is:
It is the same as the length of the width direction in the said freezer compartment. The refrigerator of any one of Claims 1-4 characterized by the above-mentioned.

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