JP6563255B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator that receives power supply from a standby power source during a power failure.

  Usually, the refrigerator is driven by receiving power supply from a power grid of an electric power company (hereinafter referred to as a commercial power system). In recent years, an increasing number of power supply systems have a standby power system in which a standby power source such as a storage battery is connected to a system different from the commercial power system in preparation for a power failure due to a disaster such as an earthquake or a typhoon. In such a power supply system, since there is an upper limit on the capacity of the standby power supply, a system (priority system) in which power is preferentially supplied to devices with high importance is provided. Under the power supply system, the refrigerator is connected to a priority system that receives power from a standby power supply system in the event of a power failure.

  There exists a thing shown in patent document 1 as a refrigerator used under the said electric power supply system. This refrigerator is communicable with the power failure monitoring means of the power supply system. When the power failure information is obtained from the power failure monitoring means, the refrigerator shifts to a low power consumption mode with less power consumption than during normal operation. By switching the refrigerator, which needs to be driven for 24 hours, to the low power consumption mode, it is possible to extend the period during which power can be supplied with only the storage battery.

  Further, in the cited document 2, as a low power consumption mode (emergency operation mode) of a refrigerator, a set temperature is increased, a cooling room is limited (for example, cooling of some cooling rooms is stopped), an ice making room Those that use ice for cooling and those that stop devices that are not directly used for cooling inside the cabinet are disclosed.

  By using the refrigerator as described above, a space lower than the outside (a space that can be cooled) can be secured for a long period of time.

JP2003-244866 (paragraph 0021) Japanese Patent Laying-Open No. 2015-6014 (paragraphs 0037 to 0039)

  However, according to the conventional refrigerator described above, since the power is switched to the low power consumption mode (emergency operation mode) together with the power failure, the temperature inside the cabinet rises even during a short time power outage that allows normal operation. There is a possibility that deterioration of articles stored inside chemicals may progress.

  Therefore, the present invention is a refrigerator that receives power supply from a reserve power source such as a storage battery at the time of a power failure, and suppresses deterioration of stored items in the refrigerator in a short-time power failure, and a low temperature in the refrigerator at a long-time power failure. It aims at providing the refrigerator which can be maintained for a long period of time.

  In order to achieve the above object, the present invention is a refrigerator that receives power supply from a standby power source in the event of a power failure and cools a storage room, and is operated in a normal operation that operates under normal operating conditions and more than the normal operation. It is possible to switch between a power outage operation that operates under operating conditions with low power consumption, and the normal operation is maintained until a predetermined time elapses after the occurrence of the power outage and the power outage operation is continued when the power outage continues after the predetermined time elapses Provide a refrigerator to transition to.

  According to this configuration, normal operation is performed from the time of the occurrence of a power failure until the lapse of a certain period of time, so it is possible to suppress deterioration of articles stored therein in the event of a power failure for a short period (for example, within one day). Is possible. In addition, after a certain amount of time has elapsed, the system shifts to a power outage operation that consumes less power than in normal operation, thus reducing power consumption, reducing the consumption of standby power sources, and extending the period during which the storage room can be maintained at a low temperature. Can do.

  This makes it possible to store food for a long period of time and reduce the user's anxiety even in situations where there is no way to recover from a power outage, such as when a disaster occurs. be able to.

  The said structure WHEREIN: The temperature condition of the said storage room is included in the said operation conditions, The temperature condition at the time of the said power failure operation may be a temperature higher than the temperature condition at the time of the said normal operation.

  The said structure WHEREIN: An operation condition may be changeable by the user at the time of the said power failure driving | operation.

  In the above configuration, the power failure operation may include a plurality of power failure operation modes with different power consumptions, and after the predetermined time has elapsed, the power failure operation mode may be shifted to a power failure operation mode with less power consumption according to the elapsed time.

  In the above configuration, the power outage operation includes a plurality of power outage operation modes with different power consumptions, and the user can freely select the plurality of power outage operation modes during the power outage operation, and operate in the selected power outage operation mode. You may do it.

  In the above configuration, a plurality of storage rooms may be provided, and cooling of at least one storage room may be stopped during the power failure operation.

  In the above configuration, the plurality of storage rooms are provided with a refrigeration room and a freezing room having a temperature lower than that of the refrigeration room, and the freezing room is set to the same temperature as the refrigeration room during the power failure operation. You may do it.

  In the above configuration, information on the remaining capacity of the standby power source is acquired and an internal state is detected, a continuous operation possible time is calculated from the remaining capacity of the standby power source and the internal state, and the continuous operation possible time is used. You may make it notify a person.

  In the above configuration, the internal state may include a storage amount acquired from a result of continuing internal temperature detection.

  The said structure WHEREIN: The ice storage part which stores ice is provided, The said ice storage part may be arrange | positioned at least upstream of a cold air circuit at the time of a power failure driving | operation.

  According to the present invention, it is a refrigerator that receives power supply from a reserve power source such as a storage battery at the time of a power failure, and suppresses deterioration of stored items in the refrigerator in a short-time power failure, and a low temperature in the refrigerator at a long-time power failure. Can be provided for a long time.

It is a block diagram of an example of the electric power supply system provided with the storage battery to which the refrigerator concerning this invention is connected. It is sectional drawing seen from the front of an example of the refrigerator concerning this invention. It is sectional drawing cut | disconnected by the III-III line | wire shown in FIG. It is sectional drawing cut | disconnected by the IV-IV line | wire shown in FIG. It is a block diagram which shows the structure of the refrigerator shown in FIG. It is a table | surface which shows each operating condition at the time of normal driving | operation and a power failure driving | operation. It is a figure which shows the temperature setting of each store room at the time of normal driving | operation. It is a figure which shows the temperature setting of each storeroom at the time of a power failure driving | operation. It is a flowchart which shows the driving | operation of the refrigerator concerning this invention. It is a table | surface which shows the driving | running condition at the time of the power failure driving | operation of the refrigerator concerning this invention. It is a figure which shows the temperature setting of each storeroom at the time of 1st power failure operation mode. It is a figure which shows the temperature setting of each storeroom at the time of 2nd power failure operation mode. It is a figure which shows the timing of the mode switch at the time of a power failure driving | operation. It is a block diagram of the refrigerator concerning this invention. It is a figure which shows the display content of the display part of the refrigerator concerning invention.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a block diagram of an example of a power supply system including a storage battery to which a refrigerator according to the present invention is connected. As shown in FIG. 1, the power supply system PS includes a power supply control unit PP, a standby power supply system BS, and a load system LS. The power supply system PS is supplied with power from the commercial power system CS. Here, the commercial power system CS is a power supply network by a power supplier such as a power company.

  The load system LS is a system to which electrical equipment is connected. The refrigerator Rf according to the present invention is connected to the load system LS and receives power supply from the load system LS. In addition, devices other than the refrigerator Rf (for example, lighting, television, washing machine, etc., all not shown) are connected to the load system LS.

  The standby power supply system BS includes a storage battery BS1 which is a standby power source, and a power conditioner BS2. The standby power supply system BS charges the storage battery BS1 with power from the commercial power system CS, and supplies power to the load system LS as necessary with discharge power from the storage battery BS1. The storage battery BS1 may be a stationary storage battery or a portable storage battery. Examples of portable storage locations include batteries mounted on electric cars, hybrid cars, and the like.

  Further, as the standby power supply system BS, a power generation device such as sunlight, wind power, or a fuel cell may be connected and used while charging the storage battery BS1. Further, when the above-described power generation apparatus can generate power (for example, there is sunshine in the case of sunlight), the power from the power generation apparatus may also be supplied to the load system LS.

  The power conditioner BS2 is connected to the power supply control unit PP, and when charging the storage battery BS1 with the power supplied from the commercial power system CS, when supplying the alternating current to direct current and from the storage battery BS1 to the load system LS, Converts direct current to alternating current.

  The power feeding control unit PP has a function of a distribution board that supplies power from the commercial power system CS to the standby power system BS and the load system LS or supplies only to the load system LS. The power supply control unit PP also has a function of a distribution board that supplies power from the standby power supply system BS to the load system LS when power from the commercial power system CS is interrupted (at the time of power failure). Therefore, the power supply control unit PP monitors the power supply from the commercial power system CS and obtains the remaining amount of power stored in the storage battery BS1.

  In addition, the power supply control unit PP has a configuration capable of communicating with a device having a communication function among devices connected to the load system LS. As this communication method, for example, a conventionally known method such as wireless communication or communication via a power line is used. The refrigerator Rf according to the present invention communicates with the power supply control unit PP, and the power supply control unit PP receives power failure information (for example, power failure) when power supply from the commercial power system CS is stopped (that is, power failure is started). Signal). Further, when power supply from the commercial power system CS is restored, restoration information (for example, a restoration signal) is transmitted.

  Note that power supply from the standby power supply system BS to the load system LS is performed during a power failure, but is not limited thereto. For example, from the standby power system BS so as to charge the storage battery BS1 at a time when the demand for the commercial power system CS is low (for example, midnight) and to supplement the power from the commercial power system CS at a time when the demand is high (for example, daytime). In some cases, so-called peak cut operation is performed in which power is supplied.

(First embodiment)
Next, the refrigerator according to the present invention will be described with reference to the drawings. 2 is a cross-sectional view of an example of a refrigerator according to the present invention as viewed from the front, FIG. 3 is a cross-sectional view taken along line III-III shown in FIG. 2, and FIG. 4 is a line IV-IV shown in FIG. It is sectional drawing cut | disconnected by. In the following description, the position in FIG. 2 will be described as a reference, and when referring to the right or left, the state in FIG.

  The refrigerator Rf has a heat insulation box 100 filled with a foam heat insulating material. The refrigerator Rf includes a plurality of storage rooms by partitioning the inside of the heat insulating box 100 with a partition wall. A partition wall 101 that divides the inside of the heat insulating box 100 vertically is provided at an intermediate portion in the vertical direction. Moreover, the partition wall 102 which divides the inside of a lower space up and down is provided. And the partition wall 103 which divides | segments the upper space divided by the partition wall 102 into right and left is provided. Further, a partition wall 104 that divides the left space partitioned by the partition wall 103 into upper and lower portions is provided.

  Of the plurality of storage rooms of the refrigerator Rf, the storage room formed above the partition wall 101 is the refrigerator compartment 1. The storage room formed below the partition wall 102 is the lower freezing room 2. The lower storage room on the left space partitioned by the partition wall 103 is the upper freezing room 3, and the upper storage room is the ice making room 4 (ice storage part). Further, the storage room on the right side of the upper freezing room 3 and the ice making room 4 is a vegetable room 5.

  Note that the refrigeration room, the lower freezing room, the upper freezing room, the ice making room, and the vegetable room are not necessarily in this order, and may be changed according to the use frequency, the amount of stored items, and the like. Moreover, you may provide the store room which stores a store thing at temperature other than these store rooms.

  The lower freezer compartment 2 and the upper freezer compartment 3 are storage compartments for storing a stored product in a frozen state (for example, storing at −18 ° C.). The ice making room 4 is a storage room for storing ice produced by an ice making device (not shown), and is maintained at the same temperature as the lower freezing room 2 and the upper freezing room 3.

  As shown in FIG. 3, the partition wall 102 is provided with an opening 105 so that the lower freezer compartment 2 and the upper freezer compartment 3 communicate with each other. Similarly, the partition wall 104 is provided with an opening 106 so that the upper freezing room 3 and the ice making room 4 communicate with each other. In the refrigerator Rf, the lower freezer room 2, the upper freezer room 3, and the ice making room 4 are one heat insulating area.

  And the refrigerator compartment 1 refrigerates and preserves the stored item at a temperature higher than the lower freezer compartment 2 and the upper freezer compartment 3 (for example, 3 ° C. to 5 ° C.), and the vegetable compartment 5 has a higher temperature than the refrigerator compartment 3 (eg, 7 to 8 ° C.) and store the stored items such as vegetables in a refrigerator. In addition, the temperature of each store room is not limited to this, It sets to the temperature which can suppress deterioration of the articles | goods stored in each store room. Further, the user may be able to set the temperature as required or according to his / her preference.

  The refrigerator compartment 1 is opened and closed by a pair of double doors 11 pivoted at the left and right ends. The refrigerating chamber 1 is provided with a plurality of shelves 12 for partitioning the space up and down, and a plurality of pockets 13 are provided inside the door 11 for seasonings, beverages, etc. It is possible to store items that are easy to tip over.

  The lower freezer compartment 2, the upper freezer compartment 3, the ice making compartment 4 and the vegetable compartment 5 are opened and closed by drawer type doors 21, 31, 41 and 51 formed integrally with the storage cases 22, 32, 42 and 52, respectively. The lower freezer compartment 2 is provided with a sliding case 23 that is disposed on the upper portion of the storage case 22 so as to be slidable with respect to the storage case 22.

  The refrigerator Rf includes a cold air passage 6 and a cold air passage 7 that communicate with each other via a damper 71. The cold air passage 6 is provided on the back surface of the lower freezer compartment 2, the upper freezer compartment 3, and the ice making chamber 4. The cool air flow path 7 is provided on the back side of the refrigerator compartment 1.

  In the cold air passage 6 and the cold air flow path 7, a freezer compartment fan 61 and a refrigerator compartment fan 72 for circulating cold air are arranged, respectively. Below the freezer compartment fan 61, an evaporator 62 that generates cool air is disposed. A defrost heater 63 for removing (defrosting) frost attached to the evaporator 62 is disposed below the evaporator 62.

  The cold air passage 6 has discharge ports 601, 602, and 603 that are openings for discharging cold air to the lower freezer compartment 2, the upper freezer compartment 3, and the ice making chamber 4, and an opening that returns the cold air from the lower freezer compartment 2 to the cold air passage 6. And a certain return port 604. The cool air discharged from the discharge ports 601, 602, and 603 cools the lower freezer chamber 2, the upper freezer chamber 3, and the ice making chamber 4, respectively, and returns to the cool air passage 6 from the return port 604.

  Since the lower freezer compartment 2, the upper freezer compartment 3, and the ice making chamber 4 are a single heat insulating region, only the discharge port 603 may be provided so that cold air may be blown onto the ice making chamber 4. By doing in this way, the cold air discharged from the discharge port 603 flows in the order of the ice making chamber 4, the upper freezer chamber 3, and the lower freezer chamber 2, and the cold air can be returned from the return port 604 to the cold air passage 6. The freezer compartment 2, the upper freezer compartment 3, and the ice making chamber 4 can be efficiently cooled. In addition, since the ice making chamber 4 is provided upstream of the cold air flow path, it is possible to cool the upper freezing chamber 3 and the lower freezing chamber 2 with ice stored in the ice making chamber 4 at the time of a power failure. It is possible to maintain the state.

  The cold air flow path 7 includes a plurality of discharge ports 701 that are openings for discharging cold air to the refrigerator compartment. The plurality of discharge ports 701 are provided at four locations so as to discharge cold air to the respective stages partitioned by the shelf of the refrigerator compartment 1. The partition wall 101 is provided with a communication passage 702 that allows the refrigerator compartment 1 and the vegetable compartment 5 to communicate with each other. The cold air is heated to take heat away from the stored items when flowing through the refrigerator compartment 1. Then, the heated cold air flows into the vegetable compartment 5 from the communication path 702. Therefore, the vegetable compartment 5 is maintained at a higher temperature than the refrigerator compartment 1. The cold air flowing through the vegetable compartment 5 returns to the cold air flow path 6 through the return port 703. The return port 703 is provided on the lower side and the back side of the vegetable compartment 5.

  A machine room 10 is provided below the cold air passage 6 on the back of the lower refrigeration room 2, and a compressor 14 for operating a refrigeration cycle is installed inside the machine room 10. As the compressor 14 is driven, the refrigerant flows through a refrigerant pipe (not shown), and the evaporator 62 connected to the compressor 14 through the refrigerant pipe has a low temperature.

  In the evaporator 62, every time heat exchange is performed, moisture in the air condenses and adheres to the fins as frozen frost. When frost adheres, it becomes difficult for air to flow, so heat exchange cannot be performed and cooling efficiency is reduced. Therefore, a defrost heater 63 for removing (defrosting) frost attached to the evaporator 62 is disposed below the evaporator 62. The upper surface of the defrost heater 63 is covered with a heater cover 631. The heater cover 631 suppresses failure, breakage, and the like of the defrost heater 63 caused by the defrost water dripping onto the defrost heater 63.

  Next, the electrical configuration of the refrigerator Rf will be described. FIG. 5 is a block diagram showing the configuration of the refrigerator shown in FIG. As shown in FIG. 5, the refrigerator Rf includes a control unit 200 that controls the operation of each unit. The control unit 200 is connected to the compressor 14, the freezer compartment fan 61, the refrigerator compartment fan 72, the damper 71, the defrost heater 63, the freezer compartment temperature sensor S1, the refrigerator compartment temperature sensor S2, the operation unit Ip, and the communication unit Nw. ing. The control unit 200 includes a time measuring unit 201 and a storage unit 202.

  The compressor 14, the freezer compartment fan 61, the refrigerator compartment fan 72, the damper 71, and the defrost heater 63 are operated by a control signal from the control unit 200. Further, the freezer compartment temperature sensor S 1, the refrigerating compartment temperature sensor S 2, and the operation unit Ip input signals to the control unit 200. The communication unit Nw transmits and receives signals to and from the control unit 200.

  The freezer compartment temperature sensor S <b> 1 detects the temperature inside the lower freezer compartment 2, generates a temperature signal, and sends it to the controller 200. The refrigerator compartment temperature sensor S <b> 2 detects the temperature inside the refrigerator compartment 1, generates a temperature signal, and sends the temperature signal to the controller 200. In addition, freezer compartment temperature sensor S1 and refrigerator compartment temperature sensor S2 are sensors which detect temperature, For example, what used the thermistor can be mentioned, but it is not limited to this. Note that the freezer temperature sensor S <b> 1 may detect the temperature of the upper freezer room 3 or the ice making room 4 at the same set temperature as the lower freezer room 2.

  The rotation speed of the compressor 14 is variably controlled by the control unit 200 (for example, inverter control). The operation unit Ip is provided on the door 11 of the refrigerating room 1 or the inner surface of the refrigerating room 1, and sets the conditions (for example, temperature) of the refrigerating room 1, the lower freezing room 2, the upper freezing room 3, the ice making room 4, and the vegetable room 5. )I do. The operation unit Ip may have a configuration in which the temperature can be set stepwise by a notch or the like, or a configuration in which an operation is performed with a plurality of switches. In addition, the operation unit Ip may include a display unit that displays the current state of the refrigerator Rf (for example, the current temperature and temperature setting), and may be configured to perform operation input with a touch panel using a touch sensor.

  The communication unit Nw transmits and receives information to and from the power supply control unit PP of the power supply system PS. Examples of information received from the power supply control unit PP include information on the start / end of a power failure and the remaining amount of power stored in the storage battery BS1.

  The timer 201 measures the elapsed time from an arbitrary time point. The storage unit 202 is a memory that stores information such as information sent to the control unit 2, information processed by the control unit 200, and information previously given to the control unit 200. Note that the timing unit 201 and the storage unit 202 are formed integrally with the control unit 200, but are not limited to this, and are provided independently of the control unit 200 and can be freely accessed by the control unit 200. It may be a configuration.

  Next, the operation of the refrigerator Rf will be described. As described above, each storage room of the refrigerator compartment 1, the lower freezer room 2, the upper freezer room 3, the ice making room 4 and the vegetable room 5 has an appropriate temperature range for cooling the stored items. Then, an operation is performed so that each storage room has an appropriate temperature. This operation is referred to as normal operation. Note that the refrigerator Rf performs normal operation when power is supplied from the commercial power system CS, that is, when there is no power outage.

  Further, when the power supply from the commercial power system CS is stopped, that is, in the event of a power failure, the refrigerator Rf operates in a power failure mode with reduced power consumption so that the operation period due to the power supply from the storage battery BS1 can be extended. I do.

  In the refrigerator Rf, a power saving operation capable of suppressing power consumption may be performed during normal use, for example, when power is supplied from the commercial power system CS (at the time of non-power failure).

  Power-saving operation is an operation that operates during a non-power failure, and normal operation of power consumption by adjusting the internal temperature within a range that does not impair the convenience of the refrigerator Rf, for example, within a range that does not deviate from the proper storage temperature of food. It is the operation which reduces more. The power saving operation is switched from the normal operation based on the setting of the user or on the condition that the frequency of door opening and closing is extremely low.

  On the other hand, power outage operation is an operation that operates only during a power outage, and reduces the power consumption more than power saving operation by adjusting the temperature in the cabinet to the extent that may partially impair the convenience of the refrigerator. It is. In principle, the refrigerator Rf does not automatically perform a power failure operation during normal use (non-power failure) (for example, unless there is a user instruction). That is, the power failure operation is different from the power saving operation.

  Next, normal operation and power failure operation will be described. FIG. 6 is a table showing each operation condition during normal operation and during power failure operation. Moreover, FIG. 7 is a figure which shows the temperature setting of each store room at the time of normal operation, and FIG. 8 is a figure which shows the temperature setting of each store room at the time of a power failure operation. In the table | surface shown in FIG. 6, the freezer compartment temperature, the refrigerator compartment temperature, and damper operation | movement switching are shown as operation conditions. In addition, the table | surface shown in FIG. 6 is an example of driving | running conditions, and is not limited to this. Moreover, since the lower freezer compartment 2, the upper freezer compartment 3, and the ice making room 4 are storage rooms in the same heat insulation area | region, they are collectively set as the freezer compartment.

  As shown in FIG. 6, during the normal operation, the freezer compartment is set to the first freezing temperature Fr1. The damper 71 is allowed to open and close, and the temperature of the refrigerator compartment can be adjusted. The temperature is set to the first refrigerator temperature Fc1. The first freezing temperature Fr1 is a temperature at which a stored product can be frozen and stored for a long period of time, and can be, for example, −18 ° C. or lower. Similarly, the refrigerator compartment is a temperature at which a stored product can be stored at a low temperature and stored for a long period of time. The refrigerator compartment can be set to 0 ° C. or higher so as not to freeze the stored items.

  As shown in FIG. 7, during the normal operation, the lower freezer compartment 2, the upper freezer compartment 3, and the ice making chamber 4 are adjusted to have the first freezing temperature Fr1. Moreover, the refrigerator compartment 1 is adjusted so that it may become 1st refrigerator temperature Fc1, and the vegetable compartment 5 is adjusted so that it may become 1st vegetable compartment temperature Fv1 (for example, 7 degreeC) higher than 1st refrigerator temperature Fc1.

  Power outages, that is, power supply from the commercial power system CS are stopped due to the possibility of relatively quick recovery such as a fault in the transmission line or a fault in the power transmission equipment, and the suspension of power transmission due to an earthquake, typhoon, landslide, avalanche, etc. There are some cases where the prospect of recovery is difficult. The power failure mode of the refrigerator Rf is an operating condition for maintaining a storage room having a temperature lower than that of the outside air over a long period of time when it is difficult to predict the latter recovery.

  In addition, as shown in FIG. 6, during the power failure operation, the freezer compartment is set to the first refrigeration temperature Fc1 in order to reduce power consumption. Further, the damper 71 is set to be normally closed, and the temperature setting of the refrigerator compartment (and the vegetable compartment) becomes impossible.

  As shown in FIG. 8, during the power failure operation, the lower freezer compartment 2, the upper freezer compartment 3, and the ice making chamber 4 are adjusted to the first refrigeration temperature Fc1. Moreover, the refrigerator compartment 1 and the vegetable compartment 5 are not temperature-adjusted, that is, they are in a state where there is no set temperature. In this case, since the refrigerator compartment 1 and the vegetable compartment 5 are spaces surrounded by a heat insulator, the temperature gradually rises and then becomes the same temperature as the external temperature.

  Thus, at the time of a power failure operation, the set temperature of the lower freezer room 2, the upper freezer room 3, and the ice making room 4 is set to the first refrigeration temperature Fc1, and the cooling of the refrigeration room 1 and the vegetable room 5 is stopped, whereby the cooling device ( It is possible to reduce the power consumed by the compressor 14). In addition, when a power outage occurs for a long period of time, it may be difficult to replenish food, etc., due to a disaster such as an earthquake or a typhoon, and contact with the outside may be interrupted. Even in such a case, by setting some of the storage rooms (here, the lower freezing room 2, the upper freezing room 3, and the ice making room 4) of the refrigerator Rf to the first refrigeration temperature Fc1, food can be stored even during a power failure. Can be stored for a long time. As a result, food can be secured even when food cannot be replenished.

  Next, control for switching between normal operation and power failure operation of the refrigerator according to the present invention will be described. FIG. 9 is a flowchart showing the operation of the refrigerator according to the present invention. As illustrated in FIG. 1, the refrigerator Rf is connected to the power supply control unit PP through a power line, and has a configuration capable of communication (PLC: Power Line Communication) in which a signal is superimposed on the power flowing through the power line. When the power supply from the commercial power system CS is stopped, the power supply control unit PP detects a power failure and generates a power failure signal and sends it to the refrigerator Rf.

  The control unit 200 of the refrigerator Rf confirms whether or not a power failure signal has been received via the communication unit Nw (step S101). If the power failure signal has not been received (No in step S101), the control unit 200 remains in a normal operation state. stand by. When a power failure signal is received via the communication unit Nw (Yes in step S101), the control unit 200 starts counting time from the start of the power failure using the time measuring unit 201 (step S102).

  When the power supply from the commercial power system CS is restored, the power supply control unit PP transmits a restoration signal to notify the restoration of the power supply from the commercial power system CS. Therefore, the control unit 200 confirms whether or not the recovery signal is received via the communication unit Nw, that is, whether or not the power failure has ended (step S103). When the power supply from the commercial power system CS is restored, that is, when the power failure is completed (Yes in step S103), it is confirmed whether or not the power failure operation is currently being performed (step S104). When the power failure operation is being performed (Yes in step S104), the control unit 200 switches to normal operation (step S105). And when it is not during a power failure operation (in the case of No in step S104) or after switching to a normal operation (step S105), it returns to the detection of a power failure (step S101).

  In addition, after the time count is started, when the power supply from the commercial power system CS has not been restored, that is, when the power failure has not been completed (No in step S103), the control unit 200 performs a certain time from the start of the power failure. It is confirmed whether the time has passed (step S106). If a certain time has not elapsed since the start of the power failure (No in step S106), the process returns to step S103. When a certain time has elapsed since the start of the power failure (Yes in step S106), the control unit 200 switches to the power failure operation (step S107).

  The control unit 200 confirms whether or not the restoration signal is received via the communication unit Nw, that is, whether or not the power failure has ended (step S108). When the recovery signal is not received via the communication unit Nw, that is, when the power failure continues (No in step S108), the control unit 200 continues to confirm the reception of the recovery signal. When the recovery signal is received via the communication unit Nw, that is, when the power failure is completed (Yes in step S108), the control unit 200 switches to normal operation (step S105) and detects the power failure (step S101). Return to.

  The refrigerator Rf according to the present invention performs a normal operation (shown in FIG. 7) by performing the above-described operation until a certain time has elapsed from the start of the power failure. In this way, by performing normal operation until a certain period of time has elapsed since the start of the power outage, if the power outage is short (for example, several minutes to several hours), the power outage operation in which the temperature of the storage room rises is not performed. Deterioration of stored items in the storage chamber can be suppressed. Also, if a power outage continues beyond a certain time, the storage room to be maintained at a low temperature is limited, that is, the heat capacity for cooling is reduced and the set temperature is set to a high temperature, so that the power consumption can be reduced. Therefore, the period during which the storage room can be maintained at a low temperature can be extended.

  In addition, the user can determine the cause of the power outage (for example, the power failure that can be recovered immediately or the power outage that is difficult to recover. Preferentially consumes food that is refrigerated and stored in the refrigerator compartment 1 and the vegetable compartment 5. Thereby, when the cooling of the refrigerator compartment 1 and the vegetable compartment 5 stops, the articles stored in the refrigerator compartment 1 and the vegetable compartment 5 This reduces the amount of waste stored in the freezer compartment (lower freezer compartment 2, upper freezer compartment 3 and ice making compartment 4), thereby suppressing waste stored in the refrigerator. In addition, in the case of a power failure that recovers in a short period of time, normal operation is continued, so it is possible to suppress deterioration of stored items that occur when the power failure operation is performed at the same time as the power failure starts.

  By using the refrigerator Rf shown above, food can be stored for a long time even in situations where there is no prospect of recovery from a power outage, such as when a disaster occurs, and whether or not you can receive support, The user's anxiety can be reduced. Moreover, in the case of a power failure for a short time, since the storage room of the refrigerator Rf is set to the same temperature as usual, it is possible to suppress deterioration of internal articles.

  Moreover, as a fixed time until it switches to a power failure driving | operation, 2 days can be mentioned, for example. This is because power outages due to causes other than disasters rarely last more than two days in Japan. Even when a power outage occurs for more than two days due to a disaster, assistance supplies often arrive two days after the disaster occurs. Even in this case, the power outage may continue, but in the refrigerator Rf, it is possible to store food of support supplies at a low temperature.

  In the present embodiment, a predetermined temperature setting is provided for the operating conditions of the normal operation and the power failure operation. However, any temperature setting may be determined freely by the user. Moreover, the user may be able to freely switch between normal operation and power failure operation. In this case, even if there is no communication unit Nw in the refrigerator Rf, the user can determine a power failure and switch the refrigerator Rf from the normal operation to the power failure operation.

  Moreover, in this embodiment, although cooling of the refrigerator compartment 1 and the vegetable compartment 5 is stopped and the power failure operation which sets the lower freezer compartment 2, the upper freezer compartment 3, and the ice making chamber 4 to the refrigerator temperature is performed, the refrigerator compartment 1 May be maintained at the refrigeration temperature, and cooling of the lower freezer compartment 2, the upper freezer compartment 3, and the ice making compartment 4 may be stopped. However, in the refrigerator Rf, since the evaporator 62 is on the back side of the lower freezer compartment 2, the cooling of the lower freezer compartment 2, the upper freezer compartment 3, and the ice making chamber 4 is continued rather than cooling the refrigerator compartment 1 and the vegetable compartment 5. This is more efficient and can extend the cooling period.

  In the refrigerator Rf according to the first embodiment, when a certain time has passed since the start of the power failure, the normal operation is switched to the power failure operation, but at that time, the switching to the power failure operation is notified by sound or light. Good. As a result, the user can be informed that the refrigerator Rf is not operating normally, and the movement and consumption of the stored food can be promoted. Further, even within a certain time from the start of a power failure, it is possible to notify that a normal operation is being performed although a power failure has occurred.

  Moreover, in the refrigerator Rf concerning 1st Embodiment, when the power failure is complete | finished, although demonstrated as what switches from a power failure operation to a normal operation automatically, it is not limited to this. For example, during a power failure operation, the lower freezer compartment 2, the upper freezer compartment 3, and the ice making compartment 4 store articles that are stored at a low temperature at the first refrigeration temperature Fc1. If the lower freezer compartment 2, the upper freezer compartment 3, and the ice making compartment 4 are cooled to the first freezing temperature Fr1 in this state, there is a risk that deterioration or damage may occur depending on the stored items.

  Therefore, in the refrigerator Rf, the user may manually switch when returning from the power failure operation to the normal operation. At this time, the user can be switched from the power failure operation to the normal operation, that is, the user may be notified by sound or light that the power failure has ended. Furthermore, after notification, after a predetermined time has elapsed, it may be automatically switched to normal operation.

  In addition, although the temperature of a freezer compartment and the temperature of a refrigerator compartment are mentioned as an operating condition, it is not limited to this, Operation restriction of a dew condensation prevention heater, Operation restriction of a defrost heater (no defrost, defrost cycle) Etc.), and the conditions such as the limitation on the rotational speed of the compressor may be switched between normal operation and power failure operation. In addition to these, a condition that affects the change in power consumption may be switched. Under the power outage operation condition, it is possible to widely adopt an operation condition that can reduce power consumption as much as possible while maintaining a certain low temperature in some storage rooms.

(Second Embodiment)
Another example of the refrigerator according to the present invention will be described with reference to the drawings. FIG. 10 is a table showing operating conditions during a power failure operation of the refrigerator according to the present invention. Moreover, FIG. 11 is a figure which shows the temperature setting of each storeroom at the time of 1st power failure operation mode, and FIG. 12 is a figure which shows temperature setting of each storeroom at the time of 2nd power failure operation mode. In addition, in this embodiment, since the structure of refrigerator Rf is the same as refrigerator Rf of 1st Embodiment, while using the same code | symbol, detailed description is abbreviate | omitted.

  In the first embodiment, after a certain time has elapsed since the occurrence of a power failure, cooling of some of the storage rooms (the refrigeration room 1 and the vegetable room 5) is stopped, and the remaining storage rooms (the lower freezing room 2 and the upper freezing room 3). In addition, the power failure operation is performed in which the set temperature of the ice making chamber 4) is increased to a temperature at which frozen storage is impossible. In such a setting, the difference in operating conditions between normal operation and power failure operation is large. Therefore, when the stored item is stored and switched from the normal operation to the power failure operation, it causes deterioration of the stored item.

  Therefore, the refrigerator Rf of the present embodiment includes a plurality of power failure operation modes as operation conditions for the power failure operation, and is switched to an operation condition with less power consumption after a certain period of time since the occurrence of the power failure.

  As shown in FIG. 10, the operating conditions during the power failure operation include a first power failure operation mode, a second power failure operation mode, and a third power failure operation mode. In the first power failure operation mode, the set temperature of the freezer compartment is set to the second freezer temperature Fr2 higher than the first freezer temperature Fr1, and the set temperature of the refrigerator compartment 1 is set to the second refrigerator temperature Fc2 higher than the first refrigerator temperature Fc1. .

  As shown in FIG. 11, in the first power failure operation mode, the lower freezer compartment 2, the upper freezer compartment 3, and the ice making chamber 4 are adjusted to have the second freezing temperature Fr2. Moreover, the refrigerator compartment 1 is adjusted so that it may become 2nd refrigerator temperature Fc2. Since the refrigerator compartment 1 is adjusted to the second refrigerator temperature Fc2, the vegetable compartment 5 is adjusted to the second vegetable compartment temperature Fv2 higher than the first vegetable compartment temperature Fv1. Since the set temperature of each storage room is higher than that during normal operation, power consumption can be reduced. Thereby, the operation time of the refrigerator Rf can be extended.

  Further, if the power failure is prolonged, the power consumption is not sufficiently cut in the first power failure operation mode. Therefore, the second power failure operation mode is provided. In the second power failure operation mode, the set temperature of the freezer compartment remains the second freezing temperature Fr2. Further, the damper 71 is set to be normally closed, and the temperature setting of the refrigerator compartment (and the vegetable compartment) becomes impossible.

  As shown in FIG. 12, in the second power failure operation mode, the lower freezer compartment 2, the upper freezer compartment 3, and the ice making chamber 4 are adjusted to the second freezing temperature Fr2. Moreover, the refrigerator compartment 1 and the vegetable compartment 5 are not temperature-adjusted, that is, they are in a state where there is no set temperature. In this case, since the refrigerator compartment 1 and the vegetable compartment 5 are spaces surrounded by a heat insulator, the temperature gradually rises and then becomes the same temperature as the external temperature. In the refrigerator Rf, since the temperature adjustment of the refrigerator compartment 1 and the vegetable compartment 5 is not performed in the second power failure operation mode, the power consumption is reduced as compared with the first power failure operation mode.

  Further, if the power failure is prolonged, the power consumption is not sufficiently cut even in the second power failure operation mode. Therefore, a third power failure operation mode is provided. The third power failure operation mode is the same as the operation conditions during the power failure operation shown in FIG.

  Switching between the first power outage operation mode, the second power outage operation mode, and the third power outage operation mode will be described. FIG. 13 is a diagram illustrating the timing of mode switching during a power failure operation.

  In FIG. 13, the horizontal axis represents time, and the vertical axis represents power consumption. In FIG. 13, the time when a power failure occurs is a reference, that is, 0. As shown in FIG. 13, immediately after the occurrence of a power failure, the refrigerator Rf is operated in a normal operation Tq. When a certain time Tp1 has elapsed since the occurrence of the power failure, the refrigerator Rf switches from the normal operation Tq to the power failure operation Tm. As shown in FIG. 13, immediately after switching to the power failure operation Tm, the refrigerator Rf is operated in the first power failure operation mode Tm1. Moreover, when the time Tp2 elapses, the refrigerator Rf switches to the second power failure operation mode Tm2 in which the power consumption is less than the first power failure operation mode Tm1. Furthermore, when the time Tp3 has elapsed, the refrigerator Rf is operated in the third power failure mode Tm3 whose power consumption is lower than that in the second power failure mode Tm2.

  In this way, by gradually reducing the power consumption of the refrigerator Rf, it is possible to secure a storage room for a long period of time while delaying the deterioration of stored items and maintaining the interior at a low temperature.

  In addition, although the temperature of a freezer compartment and the temperature of a refrigerator compartment are mentioned as an operating condition, it is not limited to this, Operation restriction of a dew condensation prevention heater, Operation restriction of a defrost heater (no defrost, defrost cycle) Etc.), and a power failure operation mode in which conditions such as restriction on the rotational speed of the compressor are changed may be provided. Moreover, it is good also as a power failure operation mode by switching the conditions which have influence on the change of power consumption besides these. In addition, the plurality of power outage operation modes may include the above-described operation conditions equivalent to the power saving operation.

(Third embodiment)
Still another example of the refrigerator according to the present invention will be described with reference to the drawings. FIG. 14 is a block diagram of a refrigerator according to the present invention. As shown in FIG. 14, the refrigerator Rf according to the present invention has the same configuration as the refrigerator shown in FIG. 5 except that the refrigerator Rf includes a display unit Dp. Therefore, substantially the same parts are denoted by the same reference numerals, and detailed description of the same parts is omitted.

  In the power supply system PS, the power supply control unit PP acquires information on the storage capacity of the storage battery BS1. The control unit 200 of the refrigerator Rf acquires information on the storage capacity from the power supply control unit PP. And the control part 200 calculates the time (period) which refrigerator Rf can cool a storage room continuously from the present driving | running state and electrical storage capacity, and displays it on the display part Dp. In addition, although the liquid crystal display device and LED display which were provided in the outer surface of the door 11 of the refrigerator compartment 1 can be mentioned as the display part Dp, it is not limited to this.

  By displaying the coolable time on the display unit Dp in this way, the user can know the remaining period during which low-temperature storage is possible, and the next action, for example, evacuation, another power supply method (for example, storage battery) The appropriate timing for selecting (switching) can be estimated.

  The calculation of the coolable time will be described. The time during which cooling can be continued depends not only on the remaining amount of electricity stored and the current set temperature, but also on the outside air temperature, humidity, driving conditions of various heaters, and the like. Therefore, the control unit 200 acquires not only the set temperature but also the outside air temperature, humidity, the driving state of various heaters, and the amount of stored items, and based on these information, the set temperature conditions, and the remaining power storage amount. Calculate the time that cooling can be continued.

  In addition, you may calculate the time which can continue cooling with the calculation methods other than this. For example, the operation time and power consumption of the compressor 14, the freezer compartment fan 61, and the refrigerator compartment fan 72 in the current operation mode are measured, and the stop time of the compressor 14, the freezer compartment fan 61, and the refrigerator compartment fan 72 is measured. Thus, the average power consumption may be calculated, and the time during which cooling can be continued may be calculated from the remaining power storage amount.

  Furthermore, the calculation may be performed in consideration of information other than these. Moreover, about the amount of stored goods, the internal temperature (temperature of a refrigerator compartment, a freezer compartment, a vegetable compartment) before power failure occurrence is measured, it accumulates in the memory | storage part 202, and it estimates from the accumulated data Is possible.

(Fourth embodiment)
Still another example of the refrigerator according to the present invention will be described with reference to the drawings. FIG. 15 is a diagram showing the display contents of the display unit of the refrigerator according to the present invention. The refrigerator Rf of this embodiment has the same configuration as that of the refrigerator of the third embodiment, and the same parts are denoted by the same reference numerals and detailed description of the same parts is omitted. In the refrigerator Rf according to the present embodiment, the operation unit Ip is used so that the user can determine the timing of the start of the power failure operation, the first power failure operation mode, the second power failure operation mode, and the third power failure operation mode. It has become.

  When receiving the power failure signal through the communication unit Nw, the control unit 200 switches the display on the display unit Dp to a power failure display Dp1 as shown in FIG. The control unit 200 includes, in the storage unit 202, information on the timing of switching to the power failure operation after the occurrence of a power failure and the timing of switching each power failure operation mode in the power failure operation. Then, information on the timing of each switching is called simultaneously with the occurrence of a power failure. Then, based on the information, as shown in FIG. 15, the horizontal axis indicates the time from the present, and a power failure display Dp1 indicating switching of operation or switching of each power failure operation mode is generated and displayed on the display unit Dp. To do.

  The display Dp1 at the time of a power failure shown in FIG. In the power failure display Dp1, the switching time of the power failure operation and each power failure operation mode determined by the control unit 200 is shown. In the power failure display Dp1, the left end is the current time. The elapsed time is the normal operation Tq until the point P1 (time Tp1). Then, when the elapsed time reaches the point P1, the operation is switched to the power failure operation Tm. The first time of switching to the power failure operation Tm is the first power failure operation mode Tm1. And when elapsed time reaches | attains point P2 (time Tp2), it switches to the power failure operation mode Tm2. Further, when the elapsed time reaches point P3 (time Tp3), the mode is switched to the power failure operation mode Tm3.

  In the power failure display Dp1, a time (period) display Ct that can be continuously cooled when the operation is switched at the switching timing currently determined at the right end is displayed. That is, FIG. 15 shows that the current setting allows cooling for 8 days.

  Then, the user can shift the timing points P1, P2 and P3 of each switching using the operation unit Ip. Every time this timing is changed, the control unit 200 recalculates and displays the time during which cooling can be continued. Then, the user can use the operation unit Ip to determine switching at the timing displayed on the power failure display Dp1. The control unit 200 stores the determined timing in the storage unit 202 and switches operation at that timing.

  An example of such a method using the display unit Dp and the operation unit Ip will be described. For example, when the user knows that the lower freezer 2 and the upper freezer 3 have no or almost no stored items, the user does not need to maintain the freezer at the freezing temperature. It is possible to set the temperature so that the cooling of the lower freezer compartment 2 and the upper freezer compartment 3 is stopped immediately after a certain time from the occurrence or the refrigeration temperature is reached. In addition, it may be possible to know when a power failure is restored. For example, even if the period of the second power outage operation mode Tm2 is extended, if the cooling can be continued until the recovery time of the power outage, the point P3 is moved backward to increase the temperature but freeze the article in the freezer. A storable temperature can be maintained.

  In this way, since the user acquires information on a period during which cooling can be continued with the power from the storage battery Bs1, the operation of the refrigerator Rf can be controlled based on the information, so that the deterioration of stored items is achieved. It is possible to extend the low temperature storage room while suppressing the above. In the present embodiment, the display unit Dp and the operation unit Ip are shown separately, but the present invention is not limited to this. For example, a so-called operation input unit using a touch panel using a touch sensor may be used. Further, the display unit Dp may be displayed by operating the operation unit Ip. Thereby, the power consumption by the display part Dp can be suppressed to the minimum.

  In the above example, the power failure display Dp1 is displayed after a power failure and the switching of each power failure operation mode can be set. However, the same display and setting can be made even when there is no power failure. As a result, the user can ponder and set the power outage settings during non-power outages, that is, during normal use, while the user understands the settings for power outages that can handle long-term power outages due to disasters, etc. Can be set.

(Fifth embodiment)
Still another example of the refrigerator according to the present invention will be described. In each of the above-described embodiments, the refrigerator Rf switches the operation (normal operation, power failure operation, each power failure operation mode) based on the time since the power failure. The operation can be switched at a predetermined timing, or the user can change the switching timing.

  Thus, when switching is controlled by time, there may be a case where sufficient time for the refrigerator Rf to be continuously cooled cannot be secured depending on the remaining amount of electricity stored. Therefore, the control unit 200 periodically checks the remaining amount of power stored in the storage battery BS1 from the supply control unit PP. And you may make it switch a driving | operation based on electrical storage residual amount. Note that the operation switching based on the remaining amount of electricity stored in the storage battery BS1 may be applied at the time of switching each power outage operation mode during the power outage operation. That is, after the occurrence of a power failure, the timing for switching from the normal operation to the power failure operation may be performed in time (predetermined time), and then the power failure operation mode may be switched based on the remaining amount of power stored in the storage battery BS1.

  Note that the communication unit Nw of the refrigerator Rf is capable of two-way communication with the power supply control unit PP, and therefore sends the above-described continuously coolable time to the power supply control unit PP to display the display unit (not shown) of the power supply control unit PP. ) May be displayed. At this time, the power failure display Dp1 may be displayed together. Further, the operation of the refrigerator Rf may be switched by operating with an operation unit (not shown) provided with the power supply control unit PP.

  Furthermore, the communication unit Nw is configured to be connectable to a network by wire or wireless, and the time and / or power failure that can be continuously cooled by a device connected to the same network, such as a PC, a tablet PC, a smartphone, etc. The hour display Dp1 may be displayed. Moreover, you may enable it to switch operation of refrigerator Rf by the operation input performed with these apparatuses.

  In the refrigerators shown in the above embodiments, all the storage rooms are described as being cooled by a single evaporator, but the refrigeration area (the refrigeration room 1 and the vegetable room 5) and the freezing area (lower refrigeration) are described. The same applies to a refrigerator configured to cool the chamber 2, the upper freezing chamber 3 and the ice making chamber 4) with independent evaporators.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to this content. The embodiments of the present invention can be variously modified without departing from the spirit of the invention.

  A refrigerator that receives power supply from the standby power source BS1 in the event of a power failure and cools the storage room, and operates in a normal operation that operates under normal operating conditions and in a power condition that operates under operating conditions that consume less power than the normal operation. The operation can be switched, and the normal operation is maintained until a predetermined time elapses after the occurrence of the power failure, and when the power failure continues after the predetermined time elapses, the operation is shifted to the power failure operation.

  The above-described refrigerator may include the temperature condition of the storage room in the operation condition, and the temperature condition during the power failure operation may be higher than the temperature condition during the normal operation.

  The refrigerator described above may be capable of changing operating conditions by a user during the power outage operation.

  The above-described refrigerator may include a plurality of power outage operation modes in which the power outage operation has different power consumption, and may shift to a power outage operation mode with less power consumption according to the elapsed time after the predetermined time has elapsed.

  The above-mentioned refrigerator includes a plurality of power outage operation modes in which the power outage operation has different power consumption, and the user can freely select the plurality of power outage operation modes during the power outage operation, and operates in the selected power outage operation mode. May be.

  The above-described refrigerator may include a plurality of storage rooms and stop cooling of at least one storage room during the power failure operation.

  In the above refrigerator, the plurality of storage rooms are provided with a refrigerator compartment and a refrigerator compartment having a temperature lower than that of the refrigerator compartment, and the refrigerator compartment is operated at the same temperature as the refrigerator compartment during the power failure operation. May be.

  The refrigerator described above acquires information on the remaining capacity of the standby power source and detects an internal state, calculates a continuous operation possible time from the remaining capacity of the standby power source and the internal state, and calculates the continuous operation possible time. The user may be notified.

  The above-mentioned refrigerator may contain the storage amount acquired from the result of continuing the internal temperature detection as the internal state.

  The above-described refrigerator may include an ice storage unit that stores ice, and the ice storage unit may be disposed upstream of the cold air circuit at least during a power failure operation.

Rf Refrigerator 100 Heat insulation box 1 Refrigeration room 11 Door 12 Shelf 13 Pocket 14 Compressor 2 Lower stage freezing room 21 Door 22 Storage case 23 Sliding case 200 Control part 201 Timekeeping part 202 Storage part 3 Upper stage freezing room 31 Door 32 Storage case 4 Ice making room 41 Door 42 Storage case 5 Vegetable room 51 Door 52 Storage case 6 Cold air passage 61 Freezer room fan 62 Evaporator 63 Defrost heater 631 Heater cover 601, 602, 603 Discharge port 604 Return port 7 Cold air flow channel 71 Damper 72 Refrigeration Room fan 701 Discharge port 702 Communication path 703 Return port PS Power supply system PP Power supply control unit BS Standby power supply system BS1 Storage battery BS2 Power conditioner CS Commercial power system LS Load system S1 Freezer compartment temperature sensor Ip Operation unit Nw Communication Part Dp display part

Claims (5)

A refrigerator that receives power from a standby power source and cools the storage room in the event of a power failure,
The storage chamber has a freezing chamber communicating with the cold air passage among a cold air passage and a cold air passage communicating with each other via a damper, and a refrigeration chamber communicating with the cold air passage,
An evaporator is provided in the cold air passage;
It is possible to switch between a normal operation that operates under the operating conditions during normal operation and a power outage operation that operates under operating conditions that consume less power than the normal operation,
Maintaining the normal operation until a predetermined time elapses after the occurrence of a power failure and when the power failure continues after the elapse of the predetermined time, transition to the power failure operation,
The power outage operation, the refrigerator to have the operation mode in which the damper closed.   The refrigerator according to claim 1, wherein an operation condition during a power failure operation can be changed by a user during the normal operation or the power failure operation. The power failure operation includes a plurality of power failure operation modes with different power consumption,
The refrigerator according to claim 1 or 2, wherein after the predetermined time elapses, the operation mode shifts to a power failure operation mode with less power consumption according to the elapsed time. The front Symbol power failure operation, the refrigerator according to any one of claims 1 to 3 for stopping the cooling of the refrigerating compartment. The power outage operation, the refrigerator according to any one of claims 1 to claim 4, the pre-Symbol freezing compartment having an operation mode of operating is set to the same temperature as the cooling chamber.

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