JP2020122590A - refrigerator - Google Patents

Abstract

To provide a refrigerator that can accurately cool the inside of a special cooling room, such as a chilled room, in a target temperature range without a complicated structure, increase in the number of components and complicated control.SOLUTION: A refrigerator includes: a special cooling room provided inside a cold room; and control means for controlling cooling of the inside of the special cooling room. The control means can execute a normal cooling mode of cooling the inside of the special cooling room in a normal temperature range and a special cooling mode of cooling the inside of the special cooling room in a special temperature range that is lower than the normal temperature range in the normal cooling mode, as a cooling mode of cooling the inside of the special cooling room. The special temperature range is a temperature range within predetermined adjustment values on the basis of a target temperature in the special temperature range. A special cooling mode adjustment value specified for the special cooling mode is set as the adjustment value.SELECTED DRAWING: Figure 4

Description

This embodiment relates to a refrigerator.

Conventionally, there has been provided a refrigerator having a chilled chamber inside a refrigerating chamber (see, for example, Patent Document 1). In this type of refrigerator, it is required to maintain the temperature inside the chilled room within a set target temperature range. Therefore, in the related art, for example, the chilled chamber has a closed structure, a temperature sensor is provided in the chilled chamber to improve the detection accuracy of the temperature in the chilled chamber, and the opening/closing control of a damper provided in the blower for the cool air into the chilled chamber is performed. The temperature inside the chilled room is controlled by adjusting the temperature.

JP 2002-115954 A

However, in the conventional technique, the structure is complicated and the number of parts is increased, and it is necessary to control many constituent elements, which makes the control complicated.

Therefore, in the present embodiment, it is possible to accurately cool the inside of a special cooling chamber such as a chilled chamber to a target temperature zone without inviting a complicated structure, an increased number of parts, and a complicated control. Provide a refrigerator.

The refrigerator according to the present embodiment includes a special cooling chamber provided in a refrigerating chamber, and control means for controlling cooling of the special cooling chamber, and the control means is a cooling mode for cooling the special cooling chamber, It is possible to execute a normal cooling mode for cooling the special cooling chamber to a normal temperature zone, and a special cooling mode for cooling the special cooling chamber to a special temperature zone lower than the normal temperature zone in the normal cooling mode, The special temperature zone is a temperature zone within a predetermined adjustment value based on the target temperature in the special cooling mode, and the adjustment value for the special cooling mode defined for the special cooling mode is set as the adjustment value. To be done.

Front view schematically showing a configuration example of a refrigerator according to the present embodiment A vertical sectional side view schematically showing a configuration example of a chilled chamber and its peripheral portion according to the present embodiment. The block diagram which shows roughly the structural example of the control system of the refrigerator which concerns on this embodiment. The figure which shows roughly the example of setting of the normal temperature zone and the special temperature zone which concern on this embodiment. The flowchart which shows roughly the example of control of the refrigerator which concerns on this embodiment.

An embodiment of a refrigerator will be described below with reference to the drawings. The refrigerator 1 illustrated in FIG. 1 has a plurality of storage chambers inside a rectangular box-shaped heat-insulating box body 2 which forms the outer shell thereof, in this case, a refrigerator compartment 3, a vegetable compartment 4, an ice making compartment 5, a small freezer compartment 6, A large freezer compartment 7 is provided. In this case, the refrigerating chamber 3 is provided at the top of the heat insulating box 2. The vegetable compartment 4 is provided below the refrigerator compartment 3. The ice making chamber 5 and the small freezing chamber 6 are provided side by side at the bottom of the vegetable chamber 4. The large freezing compartment 7 is provided below the ice making compartment 5 and the small freezing compartment 6, in other words, at the bottom of the heat insulating box 2. The heat-insulating box body 2 has a structure in which a heat-insulating material such as a vacuum heat-insulating panel or urethane foam is provided between the inner box and the outer box. The plurality of storage chambers 3, 4, 5, 6, 7 are each opened and closed by a storage chamber door.

A chilled chamber 10, which is an example of a special cooling chamber, is provided inside the refrigerating chamber 3, in this case, at the bottom. Next, a configuration example of the chilled chamber 10 and its peripheral portion will be described. As illustrated in FIG. 2, a cold air duct 11 extending in the up-down direction is provided in the rear part of the refrigerating chamber 3. In the upper part of the cold air duct 11, a plurality of cold air outlets 11 a for a refrigerating compartment are provided. Further, below the cold air duct 11, a cooling chamber 12 that bulges inside the refrigerating chamber 3, which is the front side of the refrigerator 1, is provided. The chilled chamber 10 is provided in front of the cooling chamber 12 in the refrigerating chamber 3.

A chilled room cold air outlet 12a is provided in the upper part of the front surface of the cooling room 12. In addition, a chilled chamber cold air suction port 12b is provided in the lower portion of the front surface of the cooling chamber 12. The cold air outlet 12a for the chilled chamber is provided with a guide portion 12c that projects inside the chilled chamber 10, which is the front side of the refrigerator 1. The guide portion 12c is an example of guide means, and in this case, it is provided in a plate shape that is inclined downward toward the bottom surface in the chilled chamber 10. Further, the refrigerator 1 does not include dampers at the chilled room cold air outlet 12a and the chilled room cold air inlet 12b. The refrigerator 1 may be configured to include dampers at the chilled room cold air outlet 12a and the chilled room cold air inlet 12b.

A heat insulating material 12d made of, for example, urethane foam is attached to the inner surface of the cooling chamber 12. Further, in the cooling chamber 12, there are provided a cooler 13 that constitutes a refrigeration cycle for generating cool air, and a fan 14 that blows the cool air generated by the cooler 13. When the fan 14 is driven, the cool air generated by the cooler 13 is supplied from the cold air outlet 11a for the refrigerating compartment of the cold air duct 11 into the refrigerating compartment 3, and the cool air outlet for the chilled compartment of the cooling compartment 12 is provided. It is supplied into the chilled chamber 10 from 12a. At this time, the cold air blown by the fan 14 is guided from the chilled chamber cold air outlet 12a by the guide plate 12c and flows toward the bottom surface of the chilled chamber 10. Further, the cool air supplied into the chilled chamber 10 is sucked into the cooling chamber 12 from the chilled chamber cold air suction port 12b of the cooling chamber 12 by the blowing action of the fan 14.

In the refrigerator 1 according to the present disclosure, in the chilled chamber 10, a plurality of storage containers 21, 22 in this case are arranged vertically. These storage containers 21 and 22 can be individually put in and taken out from the chilled chamber 10 along the front-rear direction of the refrigerator 1. Further, the refrigerator 1 is configured so that the chilled chamber 10 does not become a hermetically sealed state when the storage containers 21 and 22 are stored in the chilled chamber 10. The refrigerator 1 may have a configuration in which the chilled chamber 10 is hermetically sealed when the storage containers 21 and 22 are stored in the chilled chamber 10.

Next, a configuration example of the control system of the refrigerator 1 will be described. The control device 30 illustrated in FIG. 3 is an example of a control unit. The control device 30 is mainly composed of, for example, a microcomputer, and controls the overall operation of the refrigerator 1 based on a control program and various setting contents. The fan 14 described above is connected to the control device 30. Further, the control device 30 is connected with an outside air temperature sensor 31, a chilled chamber temperature sensor 32, a display panel 33, a compressor 34 constituting a refrigeration cycle, and the like.

The outside air temperature sensor 31 is an example of a temperature detecting unit and an outside air temperature detecting unit, and detects the temperature of a predetermined region related to the refrigerator 1. In the refrigerator 1 according to the present disclosure, the outside air temperature sensor 31 is configured to detect the temperature of the outside air of the refrigerator 1, that is, the temperature around the refrigerator 1, as the predetermined region related to the refrigerator 1. The outside air temperature sensor 31 may be provided at a portion of the refrigerator 1 that can detect the temperature of outside air, and may be provided, for example, on the outer surface of the heat insulating box 2. As illustrated in FIG. 1, in the refrigerator 1 according to the present disclosure, the outside air temperature sensor 31 is provided on the front surface of the refrigerating compartment door that opens and closes the refrigerating compartment 3.

The chilled chamber temperature sensor 32 is an example of a temperature detection unit and a special cooling chamber temperature detection unit, and detects the temperature of a predetermined region related to the refrigerator 1. In the refrigerator 1 according to the present disclosure, the chilled chamber temperature sensor 32 detects the temperature in the chilled chamber 10, which is an example of the special cooling chamber in this case, as the predetermined region related to the refrigerator 1. The temperature sensor 32 for the chilled chamber may be provided outside the chilled chamber 10 in order to avoid complication of the structure of the chilled chamber 10 and its peripheral portion.

As illustrated in FIG. 2, in the refrigerator 1 according to the present disclosure, the chilled chamber temperature sensor 32 is provided inside the cooling chamber 12 which is an example of the outside of the chilled chamber 10. Inside the cooling chamber 12, not only the cold air supplied into the refrigerating chamber 3 but also the cold air supplied into the chilled chamber 10 flows. Therefore, the temperature sensor 32 for the chilled chamber provided in the cooling chamber 12 can indirectly detect the temperature in the chilled chamber 10. The temperature sensor 32 for the chilled chamber may be provided in a portion other than the cooling chamber 12, for example, inside the cool air duct 11.

The display panel 33 is an example of notification means, and is provided, for example, on the front surface of the refrigerating compartment door that opens and closes the refrigerating compartment 3. The display panel 33 is configured to be able to display the selected control mode by, for example, character information or icon information. Further, the display panel 33 includes, for example, a capacitance type touch switch, and also functions as an operation unit that receives a user's operation. According to the refrigerator 1 of the present disclosure, the outside air temperature sensor 31 described above is incorporated in the display panel 33. Note that the outside air temperature sensor 31 may be provided in a part different from the display panel 33.

The compressor 34 constitutes a well-known refrigeration cycle for generating cold air together with the cooler 13 and the condenser (not shown) described above. The compressor 34 cools the cooler 13 by sending the refrigerant to the cooler 13 in the refrigeration cycle.

The control device 30 controls the driving of the fan 14, the compressor 34, and the like based on the control program and various setting contents input via the display panel 33, so that the inside of various storage chambers such as the refrigerating chamber 3 is controlled. Respectively to the set temperature. Then, the refrigerator 1 according to the present disclosure is particularly creatively devised with respect to the cooling control in the chilled chamber 10. Next, an example of cooling control in the chilled chamber 10 will be described in detail.

The control device 30 is configured to be able to execute a plurality of types of cooling modes, in this case, at least a normal cooling mode and a special chilled mode, as cooling modes for cooling the inside of the refrigerating chamber 3 and the inside of the chilled chamber 10.

The normal cooling mode is a cooling mode for cooling the inside of the chilled chamber 10 to a predetermined normal temperature zone. In addition, the normal temperature zone in the normal cooling mode can be appropriately changed and set.

The special chilled mode is an example of a special cooling mode, and is a cooling mode in which the inside of the chilled chamber 10 is cooled to a special temperature zone lower than the normal temperature zone in the normal cooling mode. The special temperature zone in the special chilled mode can be appropriately changed and set in a temperature zone lower than the normal temperature zone in the normal cooling mode.

As illustrated in FIG. 4, the normal temperature band B1 is a temperature band within predetermined adjustment values u1 and d1 with reference to the target temperature K1 in the normal cooling mode. In this case, the target temperature K1 in the normal cooling mode is set to, for example, 8.0° C., and the normal temperature band B1 has a predetermined normal cooling mode upper limit temperature adjustment value u1 for the target temperature K1 in the normal cooling mode. The temperature band is between the added upper limit temperature U1 for normal cooling mode and the lower limit temperature D1 for normal cooling mode obtained by subtracting the predetermined lower limit temperature adjustment value d1 for normal cooling mode from the target temperature K1 in the normal cooling mode. ..

The upper limit temperature adjustment value u1 for the normal cooling mode and the lower limit temperature adjustment value d1 for the normal cooling mode are adjustment values for the normal cooling mode defined for the normal cooling mode, and can be appropriately changed and set. In the refrigerator 1 according to the present disclosure, the normal cooling mode upper limit temperature adjustment value u1 and the normal cooling mode lower limit temperature adjustment value d1 are both set to 1.0° C., for example. The normal cooling mode upper limit temperature adjustment value u1 and the normal cooling mode lower limit temperature adjustment value d1 may be set to different values.

On the other hand, the special temperature zone B2 is a temperature zone within a predetermined adjustment value u2, d2 with reference to the target temperature K2 in the special chilled mode. In this case, the target temperature K2 in the special chilled mode is set to, for example, 2.0° C., and the special temperature zone B2 has a predetermined special chilled mode upper limit temperature adjustment value u2 for the target temperature K2 in the special chilled mode. The temperature band is between the added special chilled mode upper limit temperature U2 and the special chilled mode lower limit temperature D2 obtained by subtracting the predetermined special chilled mode lower limit temperature adjustment value d2 from the target temperature K2 in the special chilled mode. ..

The special chilled mode upper limit temperature adjustment value u2 and the special chilled mode lower limit temperature adjustment value d2 are adjustment values for the special cooling mode specified for the special cooling mode, and can be appropriately changed and set. In the refrigerator 1 according to the present disclosure, both the special chilled mode upper limit temperature adjustment value u2 and the special chilled mode lower limit temperature adjustment value d2 are set to, for example, 0.5°C.

That is, according to the refrigerator 1 of the present disclosure, a value smaller than the upper limit temperature adjustment value u1 for the normal cooling mode is set as the upper limit temperature adjustment value u2 for the special chilled mode. Further, according to the refrigerator 1 of the present disclosure, a value smaller than the upper limit temperature adjustment value d1 for the normal cooling mode is set as the lower limit temperature adjustment value d2 for the special chilled mode. The special chilled mode upper limit temperature adjustment value u2 and the special chilled mode lower limit temperature adjustment value d2 may be set to different values.

During execution of the normal cooling mode, the control device 30 turns on the drive of the compressor 34 when the temperature in the chilled chamber 10 detected by the chilled chamber temperature sensor 32 becomes equal to or higher than the normal cooling mode upper limit temperature U1. As a result, cooling of the chilled chamber 10 is started, and the temperature of the chilled chamber 10 becomes lower than the normal cooling mode upper limit temperature U1. Further, during execution of the normal cooling mode, the control device 30 turns off the drive of the compressor 34 when the temperature in the chilled chamber 10 detected by the chilled chamber temperature sensor 32 becomes equal to or lower than the normal cooling mode lower limit temperature D1. To do. As a result, the cooling inside the chilled chamber 10 is stopped, and the temperature inside the chilled chamber 10 becomes higher than the lower limit temperature D1 for the normal cooling mode. In this way, the control device 30 controls the driving of the compressor 34 based on the temperature inside the chilled chamber 10 to maintain the temperature inside the chilled chamber 10 within the predetermined normal temperature zone B1.

Note that the control device 30 may or may not interlock the drive on/off of the fan 14 with the drive on/off of the compressor 34 during execution of the normal cooling mode. ..

On the other hand, during execution of the special cooling mode, the control device 30 turns on the drive of the compressor 34 when the temperature in the chilled chamber 10 detected by the chilled chamber temperature sensor 32 becomes equal to or higher than the special chilled mode upper limit temperature U2. To do. Thereby, cooling of the chilled chamber 10 is started, and the temperature of the chilled chamber 10 becomes lower than the special chilled mode upper limit temperature U2. Further, during execution of the special cooling mode, the control device 30 turns off the drive of the compressor 34 when the temperature in the chilled chamber 10 detected by the chilled chamber temperature sensor 32 becomes equal to or lower than the special chilled mode lower limit temperature D2. To do. As a result, the cooling inside the chilled chamber 10 is stopped, and the temperature inside the chilled chamber 10 becomes higher than the lower limit temperature D2 for the special chilled mode. In this way, the control device 30 controls the driving of the compressor 34 based on the temperature of the chilled chamber 10 to maintain the temperature of the chilled chamber 10 within the predetermined special temperature zone B2.

Further, the control device 30 controls the drive of the fan 14 as described below, for example, during execution of the special cooling mode. That is, when the temperature in the chilled chamber 10 detected by the chilled chamber temperature sensor 32 becomes equal to or higher than the special chilled mode upper limit temperature U2 during the execution of the special cooling mode, the control device 30 is based on the operating frequency of the compressor 34. And controls the rotation speed of the fan 14. That is, the control device 30 controls the rotation speed of the fan 14 by compressor-dependent control.

In the refrigerator 1 according to the present disclosure, the control device 30 is set to increase the operating frequency of the compressor 34 as the temperature inside the chilled chamber 10 is higher than the upper limit temperature U2 for the special chilled mode. Therefore, the control device 30 increases the rotation speed of the fan 14 as the temperature inside the chilled chamber 10 is higher than the special chilled mode upper limit temperature U2, that is, as the operating frequency of the compressor 34 is higher. In this case, the control device 30 controls the rotational speed of the fan 14 in a plurality of stages, for example, three stages of 2000 rpm, 1500 rpm, and 1000 rpm according to the operating frequency of the compressor 34, in other words, according to the temperature in the chilled chamber 10. Is configured to switch.

When the temperature in the chilled chamber 10 is equal to or higher than the upper limit temperature U2 for the special chilled mode, the rotation speed of the fan 14 may be constant regardless of the operating frequency of the compressor 34, for example, 1500 rpm.

Further, when the temperature in the chilled chamber 10 detected by the chilled chamber temperature sensor 32 is maintained in the special temperature zone B2 during execution of the special cooling mode, the control device 30 causes the outside air temperature sensor 31. The rotation speed of the fan 14 is controlled based on the temperature of the outside air of the refrigerator 1 detected by. That is, the control device 30 controls the rotation speed of the fan 14 by the outside air temperature dependent control.

When the temperature in the chilled chamber 10 is maintained in the special temperature zone B2, that is, when the temperature in the chilled chamber 10 is the target temperature K2 in the special chilled mode, the upper limit temperature adjustment value u2 for the special chilled mode is added. When the temperature range is maintained between the special chilled mode upper limit temperature U2 and the special chilled mode lower limit temperature D2 obtained by subtracting the special chilled mode lower limit temperature adjustment value d2 from the target temperature K2 in the special chilled mode. That is.

In the refrigerator 1 according to the present disclosure, the control device 30 increases the rotation speed of the fan 14 as the temperature of the outside air of the refrigerator 1 is higher. In this case, the control device 30 is configured to switch the rotation speed of the fan 14 in a plurality of stages, for example, three stages of 900 rpm, 850 rpm, and 800 rpm according to the temperature of the outside air of the refrigerator 1.

The rotation speed of the fan 14 in the case where the temperature in the chilled chamber 10 is maintained in the special temperature zone B2 is the rotation speed of the fan 14 in the case where the temperature in the chilled chamber 10 is equal to or higher than the special chilled mode upper limit temperature U2. It is recommended to set the rotation speed lower than the rotation speed. Further, the rotation speed of the fan 14 when the temperature in the chilled chamber 10 is maintained in the special temperature zone B2 may be constant regardless of the temperature of the outside air of the refrigerator 1, for example, constant at 900 rpm. ..

Further, the control device 30 is further configured to be able to execute the moisture mode. The moisture mode is a control mode for supplying moisture into the chilled chamber 10. In this case, the frost attached to the cooler 13 is blown away by the blowing action of the fan 14 and supplied into the chilled chamber 10. ing. That is, the moisture mode is also an example of a defrosting mode for removing frost from the cooler 13. Then, control device 30 sets the rotation speed of fan 14 in the moisture mode higher than the rotation speed of fan 14 in the special chilled mode. In this case, the control device 30 sets the rotation speed of the fan 14 in the moisture mode at, for example, 2200 rpm.

The start condition for starting the operation in the moisture mode and the end condition for ending the operation can be appropriately changed and set. For example, the start condition for starting the operation in the moisture mode is that the user selects the moisture mode when the temperature of the outside air of the refrigerator 1 is equal to or higher than a predetermined temperature, or when the humidity detected by a humidity sensor (not shown) is equal to or lower than the predetermined humidity. It can be set when the start of is input. In addition, the end condition for ending the operation in the moisture mode is that the moisture mode by the user is set when the temperature of the outside air of the refrigerator 1 becomes a predetermined temperature or lower, or when the humidity detected by a humidity sensor (not shown) becomes the predetermined humidity or higher. It is possible to set the case where the end of is input.

Next, an example of control of the refrigerator 1 by the control device 30 will be described. Here, a control example in the case of selectively executing one of the above-described normal cooling mode and special chilled mode will be described. As illustrated in FIG. 5, when the control device 30 starts the cooling operation in the refrigerating chamber 3 and the chilled chamber 10, that is, when the driving of the fan 14, the compressor 34, and the like is started (S1), the control device 30 uses a timer (not shown). The measurement of the elapsed time from the start of the cooling operation, that is, the cooling time is started (S2). Further, the control device 30 confirms whether the set cooling mode is the special chilled mode (S3).

If the set cooling mode is not the special chilled mode (S3: NO), control device 30 sets target temperature K1 in the normal cooling mode as the target temperature in chilled chamber 10 (S4). Then, the control device 30 sets the normal cooling mode upper limit temperature adjustment value u1 and the normal cooling mode lower limit temperature adjustment value d1 (S5). In this case, the control device 30 sets 1.0° C. as both the normal cooling mode upper limit temperature adjustment value u1 and the normal cooling mode lower limit temperature adjustment value d1.

Then, the control device 30 sets the normal temperature zone B1 in the normal cooling mode (S6). That is, the control device 30 sets the normal cooling mode upper limit temperature U1 obtained by adding the normal cooling mode upper limit temperature adjustment value u1 to the target temperature K1 in the normal cooling mode, and the target temperature K1 to the normal cooling mode lower limit temperature in the normal cooling mode. The temperature zone between the lower limit temperature D1 for the normal cooling mode obtained by subtracting the adjustment value d1 is determined as the normal temperature zone B1. Then, the control device 30 moves to step S10.

On the other hand, when execution of the special chilled mode is set (S3: YES), the control device 30 sets the target temperature K2 in the special chilled mode as the target temperature in the chilled chamber 10 (S7). Then, control device 30 sets upper limit temperature adjustment value u2 for special chilled mode and lower limit temperature adjustment value d2 for special chilled mode (S8). In this case, the control device 30 sets 0.5° C. as both the special chilled mode upper limit temperature adjustment value u2 and the special chilled mode lower limit temperature adjustment value d2. That is, the control device 30 sets a value smaller than the upper limit temperature adjustment value u1 for normal cooling mode as the upper limit temperature adjustment value u2 for special chilled mode, and sets the upper limit temperature for normal cooling mode as the lower limit temperature adjustment value d2 for special chilled mode. A value smaller than the adjustment value d1 is set.

Then, the control device 30 sets the special temperature zone B2 in the special chilled mode (S9). That is, the control device 30 includes the special chilled mode upper limit temperature U2 obtained by adding the special chilled mode upper limit temperature adjustment value u2 to the target temperature K2 in the special chilled mode, and the target temperature K2 to the special chilled mode lower limit temperature in the special chilled mode. The temperature zone between the special chilled mode lower limit temperature D2 and the adjustment value d2 is determined as the special temperature zone B2. Then, the control device 30 moves to step S10.

When the control device 30 proceeds to step S10, the control device 30 confirms whether or not the elapsed time from the start of the cooling operation, that is, the cooling time exceeds a predetermined maximum cooling time. The maximum cooling time can be appropriately changed and set, and in this case, for example, 60 minutes is set. When the cooling time exceeds the maximum cooling time (S10: YES), the control device 30 ends the cooling operation in the refrigerating chamber 3 and the chilled chamber 10, that is, drives the fan 14, the compressor 34, and the like. Stop (S17).

On the other hand, when the cooling time does not exceed the maximum cooling time (S10: NO), the control device 30 determines whether the cooling time exceeds the minimum cooling time and whether the temperature of the freezing compartment is a predetermined start of freezing. It is confirmed whether or not the temperature is exceeded (S11). The minimum cooling time can be appropriately changed and set, and in this case, for example, 20 minutes is set. The temperature of the freezer compartment can be detected by, for example, a temperature sensor for the freezer compartment (not shown) provided in the freezer compartment 7 or in a cold air duct for supplying cool air into the freezer compartment 7. Further, the freezing start temperature of the freezing compartment can be appropriately changed and set.

When the cooling time exceeds the minimum cooling time and the temperature of the freezing compartment exceeds the predetermined freezing start temperature (S11: YES), the control device 30 inside the refrigerating compartment 3 and the chilled compartment 10. The cooling operation is finished, that is, the driving of the fan 14, the compressor 34, etc. is stopped (S17). That is, the control device 30 is in a situation in which the temperature of the freezing compartment 7 is high enough to require cooling in a situation in which the refrigerating compartment 3 and the chilled compartment 10 are being cooled for at least the minimum cooling time. In this case, the cooling operation in the refrigerating chamber 3 and the chilled chamber 10 is terminated, and the cold air generated by the refrigeration cycle is provided to the freezing chamber 7.

On the other hand, if the cooling time does not exceed the minimum cooling time, or if the temperature of the freezing compartment does not exceed the predetermined freezing start temperature (S11: NO), the controller 30 determines the temperature sensor 32 for the chilled compartment. It is confirmed whether or not the temperature detected by, that is, the temperature in the chilled chamber 10 is lower than the lower limit temperature of the special temperature zone B2, that is, the lower limit temperature D2 for the special chilled mode (S12).

When the temperature inside the chilled chamber 10 is lower than the lower limit temperature D2 for the special chilled mode (S12: YES), the control device 30 ends the cooling operation inside the refrigerating chamber 3 and the chilled chamber 10, that is, The driving of the fan 14, the compressor 34, etc. is stopped (S17). As a result, the temperature in the chilled chamber 10 rises to the special chilled mode lower limit temperature D2 or higher, and the temperature in the chilled chamber 10 falls within the special temperature zone B2.

On the other hand, when the temperature inside the chilled chamber 10 is not lower than the lower limit temperature D2 for the special chilled mode (S12: NO), the control device 30 reminds that the set cooling mode is the special chilled mode. It is again confirmed whether or not (S13).

When the set cooling mode is not the special chilled mode (S13: NO), the controller 30 controls the rotation speed of the fan 14 by compressor-dependent control (S14). The compressor-dependent control controls the rotation speed of the fan 14 based on the operating frequency of the compressor 34. Then, when the control device 30 starts the compressor dependent control, the control device 30 proceeds to step S10. At this time, the control device 30 may move to step S3.

On the other hand, when the set cooling mode is the special chilled mode (S13: YES), the control device 30 determines that the temperature detected by the chilled chamber temperature sensor 32, that is, the temperature in the chilled chamber 10 is special. It is confirmed whether or not it is higher than the upper limit temperature of the temperature zone B2, that is, the upper limit temperature U2 for the special chilled mode (S15).

Then, when the temperature in the chilled chamber 10 is higher than the upper limit temperature U2 for the special chilled mode (S15: YES), the control device 30 determines the rotation speed of the fan 14 based on the operating frequency of the compressor 34. Control (S14).

On the other hand, when the temperature inside the chilled chamber 10 is not higher than the special chilled mode upper limit temperature U2 (S15: NO), the control device 30 controls the rotation speed of the fan 14 by the outside air temperature dependent control ( S16). This outside air temperature-dependent control controls the rotation speed of the fan 14 based on the temperature of the outside air of the refrigerator 1. Then, when the control device 30 starts the outside air temperature dependent control, the control device 30 proceeds to step S10. At this time, the control device 30 may move to step S3.

According to the refrigerator 1 according to the present disclosure, the special chilled mode adjustment values u2 and d2 defined for the special chilled mode are set as the adjustment values that define the special temperature zone B2 in the special chilled mode. In this case, the adjustment values u2 and d2 for the special chilled mode are set to values smaller than the adjustment values u1 and d1 in the normal cooling mode. Therefore, the special temperature zone B2 in the special chilled mode is a narrower temperature zone than the normal temperature zone B1 in the normal cooling mode. Therefore, in the special chilled mode, the on/off of the compressor 34 is finely controlled as compared with the normal cooling mode. Will be done.

Therefore, the inside of the chilled chamber 10 can be accurately cooled to the special temperature zone B2 which is the target temperature zone in the special chilled mode. Further, according to the refrigerator 1 according to the present disclosure, the inside of the chilled chamber 10 can be accurately cooled to the target temperature zone by adjusting the special temperature zone B2. Therefore, for example, it is not necessary to provide the chilled chamber 10 with a closed structure, to provide a temperature sensor in the chilled chamber 10, or to provide a damper at a blower for cooling air into the chilled chamber 10, and thus the structure becomes complicated. The inside of the chilled chamber 10 can be accurately cooled to the target temperature zone without increasing the number of parts and complicating the control.

Further, according to the refrigerator 1, when the temperature in the chilled chamber 10 becomes equal to or higher than the upper limit temperature U2 of the special temperature zone B2 during the execution of the special chilled mode, the control device 30 determines whether the fan 14 operates based on the operating frequency of the compressor 34. Control the rotation speed of. Therefore, when the temperature in the chilled chamber 10 is equal to or higher than the upper limit temperature U2 of the special temperature band B2, the cool air can be quickly supplied into the chilled chamber 10 and the temperature in the chilled chamber 10 can be set to the special temperature band B2. The temperature can be quickly kept within the upper limit temperature U2, that is, within the range of the special temperature zone B2.

Further, according to the refrigerator 1, when the temperature inside the chilled chamber 10 is maintained within the range of the special temperature zone B2 during the execution of the special cooling mode, the control device 30 controls the temperature of the outside air of the refrigerator 1. The rotation speed of the fan 14 is controlled based on As a result, the amount of cold air supplied into the chilled chamber 10 can be finely adjusted according to the temperature of the outside air of the refrigerator 1, and the temperature in the chilled chamber 10 is kept within the range of the special temperature zone B2. The state can be stably maintained for a long period of time.

Further, according to the refrigerator 1, the rotation speed of the fan 14 in the moisture mode is set higher than the rotation speed of the fan 14 in the special chilled mode. That is, by setting the rotation speed of the fan 14 in the moisture mode to a certain high rotation speed, the frost adhering to the cooler 13 can be efficiently blown off and supplied into the chilled chamber 10, and the chilled chamber 10 inside It can maintain sufficient humidity.

The present embodiment is not limited to the above-described embodiment, and various modifications or expansions can be made without departing from the spirit of the present invention. For example, the refrigerator 1 is not limited to one that detects the temperature of the outside air as the temperature of the predetermined region related to the refrigerator 1, and for example, the temperature in the storage room, a machine room (not shown) in which the control device 30 and the compressor 34 are provided. It may be configured to detect the temperature such as, the temperature inside the cooling chamber 12, and the temperature inside the cooling chamber 12.

Further, the special cooling chamber is not limited to the chilled chamber 10 and may be another cooling chamber. Further, the position where the special cooling chamber is provided is not limited to the bottom portion in the refrigerating compartment 3, and may be appropriately changed, for example, in the upper part or the side portion in the refrigerating compartment 3 or inside another storage compartment. Can be implemented.

Although a plurality of embodiments of the present invention have been described above, the present embodiments are presented as examples and are not intended to limit the scope of the invention. The novel embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. The present embodiment and its modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the scope equivalent thereto.

In the drawings, 1 is a refrigerator, 3 is a refrigerating room, 10 is a chilled room (special cooling room), 13 is a cooler, 14 is a fan, 30 is a control device (control means), 31 is an outside air temperature sensor (temperature detection means, Outside temperature detecting means), 32 is a temperature sensor for chilled chamber (temperature detecting means, special cooling room temperature detecting means), and 34 is a compressor.

Claims (5)

A special cooling room provided in the refrigeration room,
Control means for controlling the cooling of the special cooling chamber,
Equipped with
The control means is
As a cooling mode for cooling the special cooling chamber,
A normal cooling mode for cooling the special cooling chamber to a normal temperature zone,
A special cooling mode for cooling the special cooling chamber to a special temperature zone lower than the normal temperature zone in the normal cooling mode,
Is feasible,
The special temperature zone is a temperature zone within a predetermined adjustment value with reference to the target temperature in the special cooling mode,
The refrigerator in which the adjustment value for the special cooling mode defined for the special cooling mode is set as the adjustment value. The normal temperature zone is a temperature zone within a predetermined adjustment value with reference to the target temperature in the normal cooling mode,
The refrigerator according to claim 1, wherein a value smaller than the adjustment value in the normal cooling mode is set as the adjustment value for the special cooling mode. Temperature detection means for detecting the temperature of a predetermined region,
A cooler that produces cold air,
A compressor that sends refrigerant to the cooler,
A fan that blows cool air generated by the cooler into the special cooling chamber;
Equipped with
During the execution of the special cooling mode, the control means, when the temperature detected by the temperature detection means is equal to or higher than the temperature obtained by adding the special cooling mode adjustment value to the target temperature in the special cooling mode, The refrigerator according to claim 1, wherein the rotation speed of the fan is controlled based on an operating frequency. As the temperature detecting means,
A special cooling chamber temperature detecting means for detecting the temperature in the special cooling chamber,
An outside air temperature detecting means for detecting the temperature of the outside air,
Equipped with
During the execution of the special cooling mode, the control unit detects the temperature detected by the special cooling chamber temperature detection unit by adding the special cooling mode adjustment value to the target temperature in the special cooling mode and the special cooling. The rotation speed of the fan is controlled based on the temperature detected by the outside air temperature detection means when the temperature is between the target temperature in the mode and the temperature obtained by subtracting the adjustment value for the special cooling mode. Refrigerator described in. The control means is capable of executing a defrost mode in which frost attached to the cooler is blown off by the fan,
The refrigerator according to claim 3 or 4, wherein a rotation speed of the fan in the defrosting mode is set higher than a rotation speed of the fan in the special cooling mode.

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