JP3969877B2 - Refrigeration equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a refrigeration apparatus including a cooling device that receives power supply and cools a cooling chamber, and in particular, includes a secondary battery serving as an auxiliary power source of the cooling device, and a part of the power to be supplied to the cooling device or The present invention relates to a refrigeration apparatus that can be entirely covered by a secondary battery.
[0002]
[Prior art]
As shown in FIG. 12, a household refrigerator that is widely used in general households includes a compressor (6) for circulating refrigerant in a refrigerant cycle, and a compressor motor (60) for driving the compressor (6). It has. The compressor motor (60) is connected to a pair of positive and negative input terminals a and b connected to a commercial power supply (not shown) of AC 100V, and between the compressor motor (60) and the input terminals a and b. The switch (51) is interposed, and the switch (51) is ON / OFF controlled by the control circuit (52).
The household refrigerator includes an internal temperature sensor (53) for detecting the temperature in the refrigerator compartment, and the internal temperature sensor (53) is connected to the control circuit (52). The control circuit (52) creates and outputs an on / off control signal for the switch (51) based on the temperature detection signal supplied from the internal temperature sensor (53).
[0003]
When the temperature in the refrigerator compartment becomes higher than a predetermined target temperature, for example, 10 ° C., the control circuit (52) creates and outputs an ON signal for the switch (51). When the switch (51) is turned on in response to an ON signal from the control circuit (52), AC power obtained from a commercial power supply is supplied to the compressor motor (60). As a result, the compressor motor (60) rotates to drive the compressor (6), and the refrigerant circulates through the refrigeration cycle to cool the refrigerator compartment.
When the temperature in the refrigerator reaches a predetermined target temperature, the control circuit (52) outputs an off signal to the switch (51). When the switch (51) is turned off in response to the off signal from the control circuit (52), the supply of electric power from the commercial power source to the compressor motor (60) is stopped, and the operation of the compressor (6) is stopped.
In this way, the operation of the compressor (6) is controlled on / off in order to keep the temperature in the refrigerator compartment at a predetermined target temperature.
[0004]
[Problems to be solved by the invention]
However, in the above-mentioned refrigerator for home use, as shown in FIG. 13, the period during which the internal temperature rises as the temperature rises and the switch (51) is turned on becomes longer from 11:00 to 19:00. The power is a large value exceeding 150W. In particular, the value increases from 13:00 to 15:00.
Home refrigerators have a high penetration rate in the country, and are still operating all year round in most homes. Therefore, the power consumption of the household refrigerator is a major cause of increasing the power load in the above-mentioned time zone at the power plant as compared with other time zones.
In addition, when a power failure occurs in the commercial power system, power supply to the compressor motor (60) becomes impossible until the commercial power system returns to normal, and the operation of the compressor (6) stops. There was a possibility that the food stored in the refrigerator compartment would rot due to the temperature in the refrigerator compartment rising.
The objective of this invention is providing the refrigeration apparatus which can suppress the increase in the electric power load of the peak electric power generation time slot | zone in a power plant.
Moreover, the objective of this invention is providing the refrigeration apparatus which can prevent the decay of the foodstuff accommodated in the refrigerator compartment when a power failure generate | occur | produces in a commercial power system.
[0005]
[Means for solving the problems]
The refrigeration apparatus according to the present invention includes a pair of commercial power input terminals to which power obtained from a commercial power source is to be input, and a cooling device that cools the cooling chamber by receiving power. And this refrigeration apparatus is in the characteristic structure,
A secondary battery serving as an auxiliary power source for the cooling device;
Power supply control means for providing a part or all of the power to be supplied to the cooling device for a certain period including the time when the power consumption of the cooling device reaches a peak in the fluctuation of the day by the secondary battery.
And has.
The cooling chamber includes a refrigeration chamber that maintains the room temperature at a target temperature of about 10 ° C. and a freezer room that maintains a target temperature of about −14 ° C. during normal operation.
[0006]
The refrigeration apparatus according to the present invention has a part of or all of the power to be supplied to the cooling device for a certain period including a time point when the power consumption of the cooling device reaches a peak in one day fluctuation, for example, from 11:00 to 19:00. Is covered by the secondary battery, so that an increase in the power load of the power plant in such a time zone can be suppressed.
[0007]
In the specific configuration, the refrigeration apparatus according to the present invention includes charge control means for supplying power from the commercial power source to the secondary battery for a certain period excluding the certain period.
[0008]
In the refrigeration apparatus having the specific configuration, since the secondary battery is charged by supplying power from the commercial power source to the secondary battery in a certain period excluding the peak power generation time zone in the power station, the power load in the power station Can be smoothed out.
[0009]
Specifically, the power supply source of the cooling device can be switched to either a commercial power source or a secondary battery, and the power supply control means includes:
First time detecting means for detecting the passage of a predetermined time before the power consumption of the cooling device reaches a peak;
Second time detection means for detecting the passage of a predetermined time after the power consumption of the cooling device reaches a peak;
A first switching means for switching the power supply source of the cooling device to the secondary battery when the passage of a predetermined time is detected by the first time detection means;
Second switching means for switching the power supply source of the cooling device to the commercial power source when the second time detection means detects the passage of the predetermined time.
And has.
[0010]
In this specific configuration, the detection time by the first time detection means is set, for example, at 11:00, while the detection time by the second time detection means is set, for example, at 19:00.
At 11 o'clock, the first time detection means detects the passage of this time and outputs a detection signal to the first switching means. The first switching means receives the detection signal and supplies power to the cooling device. Switch the source to the secondary battery. As a result, the refrigeration apparatus is in a state in which power can be supplied from the secondary battery to the cooling apparatus.
[0011]
After that, at 19 o'clock, the second time detection means detects the passage of this time, and outputs a detection signal to the second switching means. The second switching means receives the detection signal, and receives the detection signal. Switch the power supply source to commercial power. As a result, the refrigeration apparatus is in a state in which power can be supplied from the commercial power source to the cooling apparatus.
In the refrigeration apparatus having the specific configuration, since the secondary battery covers all of the power to be supplied to the cooling device from a time zone in which the power consumption of the cooling device increases, for example, from 11:00 to 19:00, such a time zone. The increase in power consumption of the power plant in can be suppressed with high effect.
[0012]
Specifically, the power supply control means includes a capacity detection means for detecting a remaining capacity of the secondary battery, and a second time based on a detection result of the capacity detection means after a predetermined time is detected by the first time detection means. Capacity determining means for determining whether or not the remaining capacity of the secondary battery is less than a predetermined capacity, and third switching means for switching the power supply source of the cooling device to a commercial power supply when it is determined that the remaining capacity is less than the predetermined capacity. It is.
[0013]
In the specific configuration, after the power supply source of the cooling device is switched to the secondary battery at 11:00, for example, as described above, the capacity determination unit determines whether the secondary battery remains based on the detection result of the capacity detection unit. It is determined whether the capacity has become less than a predetermined capacity. The third switching means switches the power supply source of the cooling device to the commercial power source when the capacity determining means determines that the remaining capacity of the secondary battery has become less than the predetermined capacity. As a result, the refrigeration apparatus is in a state in which power can be supplied from the commercial power source to the cooling apparatus.
In the refrigeration apparatus having the specific configuration, when the remaining capacity of the secondary battery becomes less than a predetermined capacity, the refrigeration apparatus is switched to a state in which power can be supplied from the commercial power source to the cooling apparatus. Necessary electric power is supplied, and the temperature in the cooling chamber is maintained at the target temperature.
[0014]
Specifically, the power supply control means includes a power failure occurrence detecting means for detecting the occurrence of a power failure in the commercial power system, and a power supply source of the cooling device when the power failure occurs in the commercial power system. 4th switching means to switch to is provided.
[0015]
In the specific configuration, when a power failure occurs in the commercial power system, the power failure detection means detects this state and outputs a detection signal to the fourth switching means. The fourth switching means receives the detection signal and switches the power supply source of the cooling device to the secondary battery. As a result, the refrigeration apparatus is in a state in which power can be supplied from the secondary battery to the cooling apparatus.
In this way, the refrigeration apparatus having the specific configuration is switched to a state in which power can be supplied from the secondary battery to the cooling apparatus even when a power failure occurs in the commercial power system. The supply of electric power to the apparatus becomes impossible and the temperature in the cooling chamber does not rise, and the foodstuffs in the cooling chamber can be prevented from being spoiled.
[0016]
Specifically, the cooling device exhibits a refrigerating capacity corresponding to the magnitude of the supplied power, and the power supply control means is configured to supply power obtained from a commercial power source or a secondary battery. A power adjusting means for adjusting the size and supplying the cooling device; and a first command means for issuing a power reduction command to the power adjusting means when a power failure occurs in the commercial power system. In response to the power reduction command from the first command means, the power to be supplied to the cooling device is reduced to the minimum required for the operation of the cooling device.
[0017]
In this specific configuration, when a power failure occurs in the commercial power system, the power failure detection means detects this state and outputs a detection signal to the fourth switching means and the first command means. The fourth switching means receives the detection signal and switches the power supply source of the cooling device to the secondary battery. As a result, power is supplied from the secondary battery to the power adjusting means.
The first command means receives a detection signal from the power failure occurrence detection means and issues a power reduction command to the power adjustment means, and the power adjustment means receives the power reduction command and receives the secondary battery. The amount of power supplied from the power supply is reduced to the minimum required for the operation of the cooling device, and the power obtained thereby is supplied to the cooling device. As a result, the cooling device operates with a constant low refrigeration capacity.
In this way, in the event of a power failure, it is possible to extend the time during which power can be supplied from the secondary battery by suppressing the power consumption of the cooling device by minimizing the power supplied to the cooling device. I can do it. The cooling device operates with a constant low refrigerating capacity as described above. However, this operation suppresses the rise in the temperature in the cooling chamber, so that the foodstuffs stored in the cooling chamber are not spoiled. Is prevented.
[0018]
More specifically, the cooling device exhibits a refrigerating capacity corresponding to the magnitude of the supplied power, and the power supply control means includes:
Power adjusting means for adjusting the amount of power obtained from a commercial power source or a secondary battery and supplying the cooling device;
Open / close frequency detecting means for detecting the open / close frequency of the cooling chamber door;
Temperature detecting means for detecting the temperature in the cooling chamber;
Power supply determination means for determining whether or not to reduce the power to be supplied to the cooling device based on the detection result of the switching frequency detection means and the detection result of the temperature detection means;
Second command means for issuing a power reduction command to the power adjustment means when it is determined that the power to be supplied to the cooling device should be reduced.
The power adjustment means receives the power reduction command from the second command means and reduces the magnitude of the power to be supplied to the cooling device to the minimum required for the operation of the cooling device. .
[0019]
In the refrigeration apparatus having the specific configuration, whether or not the power supply determination means should reduce the power to be supplied to the cooling apparatus based on the detection result of the switching frequency detection means and the detection result of the temperature detection means. Judging. Here, for example, the power supply determination means supplies the cooling device when the number of times the door of the cooling chamber has been opened and closed within the predetermined time in the past and the temperature in the cooling chamber is lower than the predetermined temperature. Judge that the power to be reduced should be reduced.
When the power supply determination means determines that the power to be supplied to the cooling device should be reduced, the second command means issues a power reduction command to the power adjustment means, and the power adjustment means In response to the reduction command, the power supplied from the commercial power supply or the secondary battery is reduced to the minimum required for the operation of the cooling device, and the power obtained thereby is supplied to the cooling device. . As a result, the cooling device operates with a constant low refrigeration capacity.
[0020]
In the refrigeration apparatus having the specific configuration, the power consumption of the cooling apparatus is suppressed by minimizing the power supplied to the cooling apparatus as described above.
Therefore, in the time zone when the power supply source of the cooling device is switched to the commercial power source, it is possible to suppress an increase in the power load at the power plant, and the power supply source of the cooling device is switched to the secondary battery. In the time zone, the time during which power can be supplied from the secondary battery can be extended.
[0021]
More specifically, the power supply control means includes a third time detection means for detecting the passage of a predetermined time before the predetermined time detected by the first time detection means, and a third time detection means. And a third command means for issuing a power increase command to the power adjustment means when the elapse of a predetermined time is detected. The power adjustment means receives the power increase command from the third command means and receives a power increase command from the third command means. The amount of electric power to be supplied to the power supply is increased to the maximum within the allowable range of the cooling device.
[0022]
The detection time by the third time detection means is set, for example, at 10:00.
In the specific configuration, at 10 o'clock, the third time detection means detects this and outputs a detection signal to the third command means. The third command means receives the detection signal and issues a power increase command to the power adjustment means. At this time, the power supply source of the cooling device is switched to the commercial power source, and power is supplied from the commercial power source to the power adjusting means. Therefore, the power adjustment means receives the power increase command, increases the amount of power supplied from the commercial power source to the maximum within the allowable range of the cooling device, and supplies the power obtained thereby to the cooling device. Supply. As a result, the cooling device operates with the highest refrigeration capacity, and the temperature in the cooling chamber becomes lower than before the operation.
[0023]
In this way, if the temperature in the cooling chamber is lowered before 11 o'clock has elapsed, the time during which the temperature in the cooling chamber is kept below the predetermined temperature becomes longer, so the power to be supplied to the cooling device is reduced. The frequency at which it is determined that the cooling device should be reduced increases, and the time during which the cooling device operates with a low refrigerating capacity increases. As a result, the time during which power can be supplied from the secondary battery is further extended in the time zone in which the power consumption of the cooling device increases.
[0024]
【The invention's effect】
According to the refrigeration apparatus according to the present invention, since part or all of the power to be supplied to the cooling device is covered by the secondary battery in the time zone when the power consumption of the cooling device increases, the peak power generation time zone of the power plant The increase of the power load in can be suppressed.
In addition, according to the refrigeration apparatus according to the present invention, when a power failure occurs in the commercial power system, it is set so that power can be supplied from the secondary battery to the cooling device. Can be prevented.
[0025]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be specifically described based on two embodiments with respect to a mode in which the present invention is implemented in a household refrigerator having a capacity of 470 L (power consumption: about 170 W, maximum output: 1400 W).
In the refrigerator according to the present invention, as shown in FIG. 1, a horizontal partition wall (11) for dividing the inside of the apparatus main body (1) into two upper and lower stages is formed inside the apparatus main body (1). A refrigerator compartment (10) for storing goods is formed.
[0026]
On the other hand, a machine storage chamber (12) is formed in the lower stage, and the compressor (4) for circulating the refrigerant in the refrigerant cycle and the compressor (4) for driving the central portion of the machine storage chamber (12). A compressor motor (not shown) and the like are provided. A storage battery unit (2) for supplying power to the compressor motor (2) (discharge capacity: 320 Wh, battery output: 110 W, 2.9 hr (operating rate 73 per hour) is provided at the bottom of the machine storage chamber (12). %) Or 180 W, 1.8 hr (operation rate 90% per hour), maximum output: 2000 W, weight: about 4.4 kg, volume: about 2.5 L).
[0027]
FIG. 2 shows the configuration of the storage battery unit (2) built in the refrigerator according to the present invention.
As shown in the figure, the storage battery unit (2) has two assembled batteries (20) and (20) (assembled battery power capacity: 200 Wh, assembled battery weight energy density: 90 Wh / kg, assembled battery volume energy density: 160 Wh / L, maximum Power density: 450 W / kg) is connected to each other in series by connecting pieces (23) and (23).
In the assembled battery (20), four unit cells (22) (22) (22) (22) are arranged inside a flat casing (21), and these unit cells (22) (22) (22) ) (22) are connected in series with each other by connecting pieces (24) and (24). Further, of the four unit cells (22), (22), (22), and (22) that constitute each assembled battery (20), the unit cell that is arranged at the position farthest from the other assembled battery (20). A pair of positive and negative electrodes (25) and (26) for connection to an external circuit are connected to (22) and (22). As the unit cell (22), for example, a high-power lithium secondary cell (unit cell power capacity: 50 Wh, unit cell weight: 0.45 kg, unit cell weight energy density: 110 Wh / kg) is adopted.
[0028]
First embodiment
In the refrigerator of the present embodiment, in order to keep the internal temperature at a predetermined target temperature, for example, 10 ° C., a normal operation mode in which the rotation speed of the compressor motor (40) is changed according to the internal temperature, and the compressor motor Switching operation can be performed between the two modes of the low load operation mode in which the rotation speed of (40) is kept to the minimum necessary within the operable range.
[0029]
FIG. 3 shows the circuit configuration of the refrigerator of this embodiment.
The refrigerator of the present embodiment includes a pair of positive and negative input terminals a and b connected to a commercial power source (not shown) of AC 100 V, and a pair of positive and negative first power supply paths (41a) (41a) ( The compressor motor (40) is connected via 41b). A rectifier circuit (31) for converting a 100V AC voltage from a commercial power source into a 280V DC voltage and an input voltage from the rectifier circuit (31) are connected to the pair of first power supply paths (41a) and (41b). And an inverter circuit (32) for generating an AC voltage to be supplied to the compressor motor (40) by changing the voltage value and frequency thereof, and the inverter circuit (32) is connected to the control circuit ( 34).
[0030]
Further, the refrigerator of the present embodiment includes an internal temperature sensor (35) as in the prior art, and the internal temperature sensor (35) is connected to the control circuit (34).
In the control circuit (34), a predetermined target temperature, for example, 10 ° C. is set for the internal temperature, and when the internal temperature rises above the target temperature, the control circuit (34) displays the internal temperature sensor (35). ) Detects the temperature rise based on the temperature detection signal supplied from), creates a control signal for increasing the rotation speed of the compressor motor (40), and outputs the control signal to the inverter circuit (32). . In response to this, the inverter circuit (32) converts the DC voltage from the rectifier circuit (31) into an AC voltage for increasing the rotation speed of the compressor motor (40), and outputs it to the compressor motor (40). To do. As a result, the rotation speed of the compressor motor (40) increases, the refrigeration capacity increases, and the internal temperature decreases.
[0031]
On the other hand, when the internal temperature becomes equal to or lower than the target temperature, the control circuit (34) detects this temperature decrease based on the temperature detection signal supplied from the internal temperature sensor (35), and the compressor motor (40) A control signal for reducing the rotation speed of the motor is generated, and the control signal is output to the inverter circuit (32). In response to this, the inverter circuit (32) converts the DC voltage from the rectifier circuit (31) into an AC voltage for reducing the rotational speed of the compressor motor (40), and then converts it into the compressor motor (40). Output. As a result, the rotational speed of the compressor motor (40) decreases, the refrigeration capacity decreases, and the internal temperature increases.
In this way, the refrigeration capacity of the refrigerator is changed by changing the rotation speed of the compressor motor (40) according to the internal temperature in order to keep the internal temperature at a predetermined target temperature, for example, 10 ° C. (Normal operation mode).
[0032]
Further, in the characteristic configuration of the refrigerator of the present embodiment, the system side switch (3) is interposed in the positive first power feed path (41a) before the rectifier circuit (31). Is controlled on / off by the control circuit (34).
When the system side switch (3) is set to ON, the voltage obtained from the commercial power source is supplied to the rectifier circuit (31), while when the system side switch (3) is set to OFF, the voltage is rectified from the commercial power source. Supply of voltage to the circuit (31) is stopped.
[0033]
The pair of first power supply paths (41a) and (41b) are respectively input between a pair of positive and negative second power supply paths (42a) and (42b) between the rectifier circuit (31) and the inverter circuit (32). The storage battery unit (2) formed by connecting the two assembled batteries (20) and (20) in series as described above is connected to the output ends of the second feeding paths (42a) and (42b). Has been. A charge / discharge circuit (33) for detecting an input voltage and boosting or lowering the input voltage is connected in series to the pair of second power supply paths (42a) (42b). The charge / discharge circuit (33) The control circuit (34) is connected.
The pair of second feed paths (42a) and (42b) are connected to the input ends of a pair of positive and negative third feed paths (43a) and (43b), respectively. These second feed paths (42a) and (42b) Is connected to the storage battery unit (2) via the charge / discharge circuit (33).
[0034]
A battery-side switch (36) is interposed downstream from the connection point with the positive third power supply path (43a) in the positive second power supply path (42a), and the positive third power supply path (43a). In this case, a charging switch (37) is interposed, and the battery side switch (36) and the charging switch (37) are on / off controlled by the control circuit (34).
When the battery side switch (36) is set to ON and the charging switch (37) is set to OFF, a DC voltage is input from the storage battery unit (2) to the charge / discharge circuit (33), and charge / discharge is performed. The circuit (33) detects the input voltage and supplies a voltage detection signal to the control circuit (34). The control circuit (34) creates a control signal for increasing the voltage based on the voltage detection signal from the charge / discharge circuit (33) and outputs the control signal to the charge / discharge circuit (33). The input voltage is boosted to 280V based on the control signal and output. The 280V DC voltage output in this way is supplied to the inverter circuit (32).
[0035]
On the other hand, when the battery side switch (36) is set to OFF and the charging switch (37) is set to ON, a 280V DC voltage output from the rectifier circuit (31) is supplied to the charge / discharge circuit (33). The charge / discharge circuit (33) detects the input voltage and supplies a voltage detection signal to the control circuit (34). The control circuit (34) creates a control signal for lowering the voltage based on the voltage detection signal from the charge / discharge circuit (33) and outputs the control signal to the charge / discharge circuit (33), and the charge / discharge circuit (33) Based on the control signal, the input voltage is stepped down to a voltage value at which the storage battery unit (2) can be charged, and supplied to the storage battery unit (2). As a result, the storage battery unit (2) is charged.
[0036]
In addition, the control circuit (34) of this embodiment constantly monitors the state of the commercial power system, detects when a power failure occurs in the commercial power system, and then turns on the compressor motor (40). A minimum voltage generation control signal for rotationally driving at a necessary minimum speed is generated, and the control signal is output to the inverter circuit (32). In response to this, the inverter circuit (32) converts the DC voltage from the charge / discharge circuit (33) into a voltage for rotationally driving the compressor motor (40) at a necessary minimum speed, Output to the compressor motor (40). As a result, the compressor motor (40) rotates at a certain minimum speed, and the refrigerator is operated with the minimum refrigerating capacity (low load operation mode).
[0037]
4 and 5 show a switch switching procedure and a mode switching procedure by the control circuit (34). Note that the procedure shown in FIG. 4 and the procedure shown in FIG. 5 are each executed in a predetermined control cycle.
When the refrigerator is turned on after purchase, etc., first, in step S1 of FIG. 4, the system side switch (3) is set to ON, the battery side switch (36) and the charging switch (37). Set to off. Also, an operation of creating a control signal corresponding to the temperature detection signal supplied from the internal temperature sensor (35) and outputting it to the inverter circuit (32) is started. As a result, the voltage obtained from the commercial power supply is supplied to the inverter circuit (32) through the rectifier circuit (31), and the voltage corresponding to the internal temperature is supplied from the inverter circuit (32) to the compressor motor (40). The refrigerator will be operated in the normal operation mode.
[0038]
Next, in step S2, it is determined whether or not the current time is 11:00, it is determined no until the current time is 11:00, and the same determination is repeated in step S2.
When the current time is 11 o'clock, it is determined as YES in step S2 and the process proceeds to step S3. The system side switch (3) is turned off and the battery side switch (36) is turned on. As a result, the voltage obtained from the storage battery unit (2) is supplied to the inverter circuit (32) through the charge / discharge circuit (33), and the voltage corresponding to the internal temperature is supplied from the inverter circuit (32) to the compressor motor (40). The refrigerator will continue to be operated in the normal operation mode.
[0039]
Subsequently, in step S4, based on the voltage detection signal supplied from the charge / discharge circuit (33), it is determined whether or not the remaining capacity of the storage battery unit (2) is greater than or equal to a predetermined capacity. Shifts to step S5 to determine whether or not the current time is 17:00. In step S5, it is determined no until the current time is 17:00, and the process returns to step S4.
If the remaining capacity of the storage battery unit (2) becomes less than the predetermined capacity before the current time is 17:00, it is determined no at step S4 and the process proceeds to step S6.
If the current time is 17:00 before the remaining capacity of the storage battery unit (2) becomes less than the predetermined capacity, it is determined as YES in step S5, and the process proceeds to step S6.
[0040]
In step S6, the system side switch (3) is turned on and the battery side switch (36) is turned off. As a result, the voltage obtained from the commercial power supply is supplied to the inverter circuit (32) through the rectifier circuit (31), and the voltage corresponding to the internal temperature is supplied from the inverter circuit (32) to the compressor motor (40). The refrigerator will continue to be operated in the normal operation mode.
Subsequently, in step S7, it is determined whether or not the current time is 22:00. It is determined no until the current time is 22:00, and the same determination is repeated in step S7.
When the current time is 22:00, it is determined yes in step S7, the process proceeds to step S8, and the charging switch (37) is turned on. As a result, the voltage obtained from the commercial power supply is supplied to the storage battery unit (2) through the rectifier circuit (31) and the charge / discharge circuit (33), and the storage battery unit (2) is charged.
[0041]
Next, in step S9, it is determined whether or not the storage battery unit (2) is fully charged based on the voltage detection signal supplied from the charging / discharging circuit (33). It is determined whether or not the current time is 6 o'clock. In step S10, it is determined no until the current time is 6 o'clock the next day, and the process returns to step S9.
Then, when the storage battery unit (2) is fully charged before the current time is 6 o'clock the next day, it is determined as YES in step S9 and the process proceeds to step S11.
If the current time is 6 o'clock the next day before the storage battery unit (2) is fully charged, it is determined as YES in step S10, and the process proceeds to step S11.
[0042]
In step S11, the charging switch (37) is switched off, and the process returns to step S2. As a result, the supply of voltage from the commercial power source to the storage battery unit (2) is stopped, and the charging of the storage battery unit (2) is completed.
[0043]
In step S21 in FIG. 5, it is determined whether or not a power failure has occurred in the system. If no power failure has occurred in the system, the same determination is repeated in step S21.
On the other hand, if a power failure occurs in the system, it is determined as YES in step S21, the process proceeds to step S22, the procedure shown in FIG. 4 is stopped, and the system side switch (3) and the charging switch (37) are turned off. And switch the battery side switch (36) to ON. Also, an operation of creating a minimum voltage generation control signal and outputting it to the inverter circuit (32) is started. As a result, the voltage obtained from the storage battery unit (2) is supplied to the inverter circuit (32) via the charging / discharging circuit (33), and the minimum required to operate the compressor motor (40) from the inverter circuit (32). The voltage for rotationally driving at the speed is supplied to the compressor motor (40), and the refrigerator is operated in the low load operation mode.
In step S23, it is determined whether or not the system has returned to the normal state, and it is determined no until the system returns to the normal state, and the same determination is repeated in step S23.
Thereafter, when the system returns to a normal state, it is determined as YES in step S23 at that time, and the process returns to step S1 in FIG. 4 to restart the procedure shown in FIG.
[0044]
In the refrigerator of this embodiment, at 11 o'clock, the power supply source of the compressor motor (40) is switched from the commercial power source to the storage battery unit (2), and then the remaining capacity of the storage battery unit (2) is reduced. The storage battery unit (2) is switched to the commercial power source when it becomes less than the predetermined capacity or when it reaches 17:00. Therefore, an increase in power load during the peak power generation time zone of the power plant is suppressed.
In addition, since the storage battery unit (2) is charged from 22:00 to 6:00 on the next day, the daily fluctuation of the power load at the power plant is smoothed.
When a power failure occurs in the commercial power system, the power supply source for the compressor motor (40) is switched from the commercial power source to the storage battery unit (2), and the operation in the low load operation mode is started. Accordingly, an increase in the internal temperature is suppressed, and the foodstuffs stored in the refrigerator compartment are prevented from being spoiled. In addition, the power consumption is suppressed by operating in the low load operation mode, and the time during which power can be supplied from the storage battery unit (2) to the compressor motor (40) is operated in the normal operation mode. It becomes longer than the case.
[0045]
Second embodiment
The refrigerator of the present embodiment has the same normal operation mode, low-load operation mode as in the first embodiment, and a cooling operation mode 3 that maximizes the rotation speed of the compressor motor (40) within the operable range. Switching operation between two modes is possible.
FIG. 6 shows the circuit configuration of the refrigerator of this embodiment.
The refrigerator of this embodiment includes a control circuit (38) having a function different from that of the first embodiment, and a door open / close sensor (39) and a memory (30) are connected to the control circuit (38). . The other circuit configuration is the same as that of the first embodiment.
[0046]
A table shown in FIG. 7 is stored in the memory (30).
As shown in the figure, the table has a table address and a flag writing field. These writing fields are provided with the number of stages obtained by dividing one day by 10 minutes, that is, 144 stages, and the table address is “000” for 10 minutes from midnight to 0:10, 10 minutes from midnight to 0:20 am “001” ... “142” from 11:40 pm to 11:50 pm, “143” for 10 minutes from 11:50 pm to midnight A serial number from “000” to “143” is assigned every 10 minutes from midnight to midnight the next day.
In the flag writing field, either “0” indicating that the number of times the door has been opened or closed is less than 3 or “1” indicating that the number of times the door has been opened or closed is 3 or more. A value is written.
[0047]
The control circuit (38) shown in FIG. 6 counts the number of times the door opening / closing detection signal is supplied from the door opening / closing sensor (39) every 10 minutes, and based on the counting result, a flag writing field for a predetermined table address. Then, the operation of overwriting the value of “0” or “1” is performed.
Then, the control circuit (38) refers to the table stored in the memory (30) to determine whether or not the door has been opened and closed for 10 minutes in the past one hour, Based on the temperature detection signal supplied from the temperature sensor (35), it is determined whether or not the internal temperature is less than 2 ° C. In the past hour, the door is opened and closed three times or more for 10 minutes even once. If there is, and if the internal temperature is 2 ° C. or higher, a control signal corresponding to the temperature detection signal supplied from the internal temperature sensor (35) is created and output to the inverter circuit (32).
As a result, as in the first embodiment, the rotational speed of the compressor motor (40) changes according to the internal temperature, and the freezing capacity changes accordingly, so that the internal temperature reaches a predetermined target temperature. Will be maintained (normal operation mode).
[0048]
On the other hand, if the control circuit (38) has not opened once in 10 minutes when the door has been opened and closed three times or more in the past hour and the internal temperature is less than 2 ° C, the control circuit (40) A minimum voltage generation control signal for rotationally driving at a necessary minimum speed is generated, and the control signal is output to the inverter circuit (32).
As a result, as in the first embodiment, the compressor motor (40) rotates at a certain minimum speed, and the refrigerator is operated with the lowest refrigeration capacity (low load operation mode).
[0049]
The control circuit (38) creates a maximum voltage generation control signal for rotationally driving the compressor motor (40) at the maximum speed at which the compressor motor (40) can be operated when the current time is 10:00. Output to the inverter circuit (32). In response to this, the inverter circuit (32) rotates the DC voltage from the rectifier circuit (31) or the charge / discharge circuit (33) at the maximum speed at which the compressor motor (40) can be driven. And output to the compressor motor (40).
As a result, the compressor motor (40) rotates at a constant maximum speed, and the refrigerator is operated with the highest refrigeration capacity (cooling operation mode).
[0050]
8 to 11 show a switch switching procedure and a mode switching procedure by the control circuit (38). The procedures shown in FIGS. 8 to 10 and the procedure shown in FIG. 11 are executed at predetermined control cycles.
When the refrigerator is turned on, first, in step S31 of FIG. 8, the system side switch (3) is set to ON, and the battery side switch (36) and the charging switch (37) are set to OFF. . Also, an operation of creating a control signal corresponding to the temperature detection signal supplied from the internal temperature sensor (35) and outputting it to the inverter circuit (32) is started. As a result, the voltage obtained from the commercial power supply is supplied to the inverter circuit (32) through the rectifier circuit (31), and the voltage corresponding to the internal temperature is supplied from the inverter circuit (32) to the compressor motor (40). The refrigerator will be operated in the normal operation mode.
[0051]
Next, in step S32, it is determined whether or not the latest flag written in the table in the memory (30) is “0”. Here, when the door has been opened and closed three times or more in the past 10 minutes from the present time, it is determined as NO and the process proceeds to step S36.
On the other hand, if the door has not been opened or closed three times or more in the past 10 minutes from the present time, it is determined as YES in step S32 and the process proceeds to step S33, and the past six flags including the latest flag are consecutive. It is then determined whether it is “0”. Here, in the past one hour from the present time, when the door has been opened and closed three times or more for 10 minutes even once, it is determined as no and the process proceeds to step S36. For example, when the current time is 8:20 am, among the flags written in the flag writing fields of “044” to “049” as shown in FIG. 7, the flag of “048” is the table address. Since the flag written in the writing column is “1”, it is determined NO in step S33 of FIG.
[0052]
On the other hand, if the door has been opened and closed three times or more in the past one hour and there has never been 10 minutes, the determination in step S33 is yes and the process proceeds to step S34. For example, if the current time is 8:00 am, as shown in FIG. 7, since all the flags written in the flag writing fields of table addresses “042” to “047” are “0”, in step S33 Judged as yes.
In step S34 of FIG. 8, based on the temperature detection signal from the internal temperature sensor (35), it is determined whether or not the internal temperature is less than 2 ° C. If NO is determined, the process proceeds to step S36. To do.
If the internal temperature is less than 2 ° C. and it is determined as YES in step S34, the process proceeds to step S35, and the operation of generating the minimum voltage generation control signal and outputting it to the inverter circuit (32) is started. Then, the process proceeds to step S37. As a result, a voltage for rotationally driving the compressor motor (40) from the inverter circuit (32) at the minimum necessary speed is supplied to the compressor motor (40). Will be driven by.
[0053]
On the other hand, if it is determined NO in step S32, step S33, and step S34 described above and the process proceeds to step S36, a control signal corresponding to the temperature detection signal from the internal temperature sensor (35) is created to create an inverter circuit. After the operation to output to (32) is started, the process proceeds to step S37. As a result, a voltage corresponding to the internal temperature is supplied from the inverter circuit (32) to the compressor motor (40), and the refrigerator is operated in the normal operation mode.
[0054]
In step S37, it is determined whether or not the current time is 10:00. Here, it is determined no until the current time reaches 10:00, and the process returns to step S32.
Then, when the current time is 10:00, it is determined as YES in step S37, the process proceeds to step S41 in FIG. 9, and the operation of creating the highest voltage generation control signal and outputting it to the inverter circuit (32) is started. As a result, the inverter circuit (32) supplies the compressor motor (40) with a voltage for rotationally driving the compressor motor (40) at the highest speed, and the refrigerator operates in the cooling operation mode. Will be.
[0055]
Next, in step S42, it is determined whether or not the current time is 11:00. Here, it is determined no until the current time is 11:00, and the same determination is repeated in step S42.
Thereafter, when the current time is 11:00, it is determined as YES in step S42, and the process proceeds to step S43, where the system side switch (3) is switched off and the battery side switch (36) is switched on. As a result, the voltage obtained from the storage battery unit (2) is supplied to the compressor motor (40) through the charge / discharge circuit (33) and the inverter circuit (32), and the refrigerator is operated.
[0056]
Subsequently, in step S44, it is determined whether or not the latest flag written in the table in the memory is “0”. Here, when the door has been opened and closed three times or more in the past 10 minutes from the present time, it is determined as NO and the process proceeds to step S48.
On the other hand, if the door has not been opened or closed three times or more in the past 10 minutes from the present time, it is determined as YES in step S44, and the process proceeds to step S45, and the past six flags including the latest flag are continuously displayed. It is then determined whether it is “0”. Here, in the past one hour from the present time, when the door has been opened and closed three times or more for 10 minutes even once, it is determined as no and the process proceeds to step S48.
On the other hand, if the door has been opened and closed three times or more in the past one hour and there has never been 10 minutes, it is determined as YES in step S45, and the process proceeds to step S46.
[0057]
In step S46, based on the temperature detection signal from the internal temperature sensor (35), it is determined whether or not the internal temperature is less than 2 ° C. If NO is determined, the process proceeds to step S48.
If the internal temperature is less than 2 ° C. and it is determined as YES in step S46, the process proceeds to step S47 to start the operation of creating the minimum voltage generation control signal and outputting it to the inverter circuit (32). Thereafter, the process proceeds to step S49. As a result, a voltage for rotationally driving the compressor motor (40) from the inverter circuit (32) at the minimum necessary speed is supplied to the compressor motor (40). Will be driven by.
[0058]
On the other hand, when it is determined NO in step S44, step S45, and step S46 described above and the process proceeds to step S48, a control signal corresponding to the temperature detection signal from the internal temperature sensor (35) is created to create an inverter circuit. After the operation to output to (32) is started, the process proceeds to step S49. As a result, a voltage corresponding to the internal temperature is supplied from the inverter circuit (32) to the compressor motor (40), and the refrigerator is operated in the normal operation mode.
[0059]
In step S49, based on the voltage detection signal supplied from the charge / discharge circuit (33), it is determined whether or not the remaining capacity of the storage battery unit (2) is greater than or equal to a predetermined capacity. The process proceeds to S50 to determine whether or not the current time is 17:00. In step S50, it is determined no until the current time is 17:00, and the process returns to step S44.
If the remaining capacity of the storage battery unit (2) becomes less than the predetermined capacity before the current time is 17:00, it is determined as no in step S49 and the process proceeds to step S51 in FIG.
Also, if the current time is 17:00 before the remaining capacity of the storage battery unit (2) becomes less than the predetermined capacity, it is determined as YES in step S50 of FIG. 9, and the process proceeds to step S51 of FIG.
[0060]
In step S51, the system side switch (3) is turned on and the battery side switch (36) is turned off. As a result, the voltage obtained from the commercial power supply is supplied to the compressor motor (40) via the rectifier circuit (31) and the inverter circuit (32), and the refrigerator is operated.
Subsequently, in step S52, it is determined whether or not the latest flag written in the table in the memory is “0”. Here, when the door has been opened and closed three times or more in the past 10 minutes from the present time, it is determined as NO and the process proceeds to step S56.
On the other hand, if the door has not been opened or closed three times or more in the past 10 minutes from the present time, it is determined as YES in step S52, and the process proceeds to step S53, and the past six flags including the latest flag are continuously displayed. It is then determined whether it is “0”. Here, in the past one hour from the present time, when the door has been opened and closed three times or more for 10 minutes even once, it is determined as no and the process proceeds to step S56.
On the other hand, if the door has been opened and closed three times or more in the past one hour and there has never been 10 minutes, it is determined as YES in step S53, and the process proceeds to step S54.
[0061]
In step S54, based on the temperature detection signal from the internal temperature sensor (35), it is determined whether or not the internal temperature is less than 2 ° C. If NO is determined, the process proceeds to step S56.
If the internal temperature is less than 2 ° C. and it is determined as YES in step S54, the process proceeds to step S55, and the operation of creating the minimum voltage generation control signal and outputting it to the inverter circuit (32) is started. Thereafter, the process proceeds to step S57. As a result, a voltage for rotationally driving the compressor motor (40) from the inverter circuit (32) at the minimum necessary speed is supplied to the compressor motor (40). Will be driven by.
[0062]
On the other hand, if it is determined NO in step S52, step S53, and step S54 described above and the process proceeds to step S56, a control signal corresponding to the temperature detection signal from the internal temperature sensor (35) is created to create an inverter circuit. After the operation to output to (32) is started, the process proceeds to step S57. As a result, a voltage corresponding to the internal temperature is supplied from the inverter circuit (32) to the compressor motor (40), and the refrigerator is operated in the normal operation mode.
[0063]
In step S57, it is determined whether or not the current time is 22:00. Here, it is determined no until the current time reaches 22:00, and the process returns to step S52.
When the current time is 22:00, it is determined yes in step S57, the process proceeds to step S58, and the charging switch (37) is turned on. As a result, the voltage obtained from the commercial power supply is supplied to the storage battery unit (2) through the rectifier circuit (31) and the charge / discharge circuit (33), and the storage battery unit (2) is charged.
[0064]
Subsequently, in step S59, it is determined whether or not the storage battery unit (2) is fully charged based on the voltage detection signal supplied from the charge / discharge circuit (33). If it is determined no, the process proceeds to step S60. Then, it is determined whether or not the current time is 6 o'clock. In step S60, it is determined no until the current time is 6 o'clock the next day, and the process returns to step S59.
If the storage battery unit (2) is fully charged before the current time is 6 o'clock the next day, it is determined as YES in step S59, and the process proceeds to step S61.
If the current time is 6 o'clock the next day before the storage battery unit (2) is fully charged, it is determined as YES in step S60, and the process proceeds to step S61.
In step S61, the charging switch (37) is switched off, and the process returns to step S32 in FIG. As a result, the supply of voltage from the commercial power source to the storage battery unit (2) is stopped, and the charging of the storage battery unit (2) is completed.
[0065]
In step S71 in FIG. 11, it is determined whether or not a power failure has occurred in the system. If no power failure has occurred in the system, the same determination is repeated in step S71.
On the other hand, when a power failure occurs in the system, it is determined as YES in step S71, the process proceeds to step S72, the procedure shown in FIGS. 8 to 10 is stopped, and then the system side switch (3) and the charging switch (37 ) Is turned off and the battery side switch (36) is turned on. Also, an operation of creating and outputting a minimum voltage generation control signal for the inverter circuit (32) is started. As a result, the voltage obtained from the storage battery unit (2) is supplied to the inverter circuit (32) via the charging / discharging circuit (33), and the minimum required to operate the compressor motor (40) from the inverter circuit (32). The voltage for rotationally driving at the speed is supplied to the compressor motor (40), and the refrigerator is operated in the low load operation mode.
[0066]
In step S73, it is determined whether or not the system has returned to the normal state, and it is determined no until the system returns to the normal state, and the same determination is repeated in step S73.
Thereafter, when the system returns to a normal state, it is determined as YES in step S73 at that time, and the process returns to step S31 in FIG. 8 to restart the procedure shown in FIGS.
[0067]
In the refrigerator of the present embodiment, the switching operation is always performed between the normal operation mode and the low load operation mode in accordance with the internal temperature and the door opening / closing frequency. For example, the vehicle is operated in the low load operation mode at night when the temperature is low or when the user is away. Therefore, power consumption is suppressed regardless of time, and an increase in power load at the power plant is suppressed.
Further, since the internal temperature is set lower than the target temperature in the normal operation mode by operating in the cooling operation mode before 11 o'clock, the time for operation in the low load operation mode becomes longer after 11 o'clock. As a result, power consumption is suppressed, and power is supplied from the storage battery unit (2) to the compressor motor (40) for a longer time than in the first embodiment operated in the normal operation mode. Therefore, an increase in power load is suppressed over a longer time in the peak power generation time zone of the power plant.
[0068]
In addition, each part structure of this invention is not restricted to the said embodiment, A various deformation | transformation is possible within the technical scope as described in a claim.
For example, in the first embodiment, the inverter circuit (32) is adopted and the operation is performed in the low load operation mode when a power failure occurs in the system, but the inverter circuit (32) is omitted, It is also possible to adopt a configuration that operates in the normal operation mode even when a power failure occurs in the system.
In the first embodiment and the second embodiment, a compression type cooling device using a compressor (4) is adopted. Alternatively, a cooling device using a Peltier element may be adopted. Is possible.
Further, in the refrigerator-freezer in which the refrigerator body and the freezer compartment are formed inside the apparatus main body, in the refrigerator compartment, as in the second embodiment, an internal temperature sensor for detecting the temperature in the refrigerator compartment is provided, and the freezer A room temperature sensor for detecting the temperature in the freezer compartment is provided in the room, and the refrigerator is operated at a low load when the temperature in the refrigerator compartment is less than 2 ° C or when the temperature in the freezer compartment is less than -20 ° C. It is also possible to adopt a configuration for switching to the mode.
Further, in the refrigerator-freezer, in addition to the door opening / closing sensor of the second embodiment for detecting the opening / closing of the door of the refrigerator compartment, a door opening / closing sensor for detecting the opening / closing of the door of the freezer compartment is adopted, and the door opening / closing frequency of the refrigerator compartment is adopted. It is also possible to adopt a configuration in which the normal operation mode and the low-load operation mode are switched based on the door opening / closing frequency of the freezer compartment.
[Brief description of the drawings]
FIG. 1 is a diagram showing a schematic configuration of a refrigerator according to the present invention.
FIG. 2 is a perspective view showing a configuration of a storage battery unit built in the refrigerator.
FIG. 3 is a block diagram showing a circuit configuration of the refrigerator.
FIG. 4 is a flowchart showing a switch switching procedure by the control circuit of the first embodiment.
FIG. 5 is a flowchart showing a switch switching procedure and a mode switching procedure executed by the control circuit when a power failure occurs in the system.
FIG. 6 is a block diagram showing a circuit configuration of a refrigerator according to a second embodiment.
FIG. 7 is a diagram illustrating a table stored in a memory according to the second embodiment.
FIG. 8 is a flowchart showing a switch switching procedure and a mode switching procedure executed by 10:00 by the control circuit of the second embodiment.
FIG. 9 is a flowchart showing a switch switching procedure and a mode switching procedure executed by the control circuit up to 17:00.
FIG. 10 is a flowchart showing a switch switching procedure and a mode switching procedure executed by the control circuit after 17:00.
FIG. 11 is a flowchart showing a switch switching procedure and a mode switching procedure executed by the control circuit when a power failure occurs in the system.
FIG. 12 is a block diagram showing a circuit configuration of a conventional refrigerator.
FIG. 13 is a graph showing a change in power consumption of a household refrigerator in one day.
[Explanation of symbols]
(1) Device body
(10) Cold room
(2) Storage battery unit
(20) Battery pack
(3) System side switch
(31) Rectifier circuit
(32) Inverter circuit
(33) Charge / discharge circuit
(34) Control circuit
(35) Internal temperature sensor
(36) Battery side switch
(37) Charging switch

Claims (6)

A pair of commercial power input terminals to which power obtained from a commercial power source is to be input, and a cooling device that receives power supply and cools the cooling chamber,
A secondary battery serving as an auxiliary power source for the cooling device;
A refrigeration apparatus comprising power supply control means for supplying a part or all of the power to be supplied to the cooling device for a certain period including a point in time when the power consumption of the cooling device reaches a peak in the fluctuation of the day. There,
The power supply source of the cooling device can be switched to either a commercial power supply or a secondary battery, and the power supply control means includes:
First time detecting means for detecting the passage of a predetermined time before the power consumption of the cooling device reaches a peak;
Second time detection means for detecting the passage of a predetermined time after the power consumption of the cooling device reaches a peak;
A first switching means for switching the power supply source of the cooling device to the secondary battery when the passage of a predetermined time is detected by the first time detection means;
Second switching means for switching the power supply source of the cooling device to a commercial power source when the passage of a predetermined time is detected by the second time detection means;
A power failure detection means for detecting the occurrence of a power failure in the commercial power system, and a fourth switching means for switching the power supply source of the cooling device to the secondary battery when a power failure occurs in the commercial power system,
The cooling device exhibits a refrigerating capacity corresponding to the amount of power supplied, and the power supply control means adjusts the amount of power obtained from a commercial power source or a secondary battery to cool the cooling device. A power adjusting means for supplying power to the apparatus; and a first command means for issuing a power reduction command to the power adjusting means when a power failure occurs in the commercial power system. A refrigeration device that receives a power reduction command and reduces the amount of power to be supplied to the cooling device to the minimum required for the operation of the cooling device.   The refrigeration apparatus according to claim 1, further comprising charge control means for supplying power from a commercial power source to the secondary battery for a fixed period excluding the fixed period.   The power supply control means includes a capacity detecting means for detecting a remaining capacity of the secondary battery, and a remaining capacity of the secondary battery based on a detection result of the capacity detecting means after a predetermined time is detected by the first time detecting means. And a third switching means for switching the power supply source of the cooling device to a commercial power source when it is determined that the capacity is less than the predetermined capacity. Or the refrigeration apparatus of 2. A pair of commercial power input terminals to which power obtained from a commercial power source is to be input, and a cooling device that receives power supply and cools the cooling chamber,
A secondary battery serving as an auxiliary power source for the cooling device;
A refrigeration apparatus comprising power supply control means for supplying a part or all of the power to be supplied to the cooling device for a certain period including a point in time when the power consumption of the cooling device reaches a peak in the fluctuation of the day. There,
The power supply source of the cooling device can be switched to either a commercial power supply or a secondary battery, and the power supply control means includes:
First time detecting means for detecting the passage of a predetermined time before the power consumption of the cooling device reaches a peak;
Second time detection means for detecting the passage of a predetermined time after the power consumption of the cooling device reaches a peak;
A first switching means for switching the power supply source of the cooling device to the secondary battery when the passage of a predetermined time is detected by the first time detection means;
A second switching means for switching the power supply source of the cooling device to a commercial power source when the second time detection means detects the passage of a predetermined time;
The cooling device exhibits a refrigeration capacity corresponding to the magnitude of supplied power, and the power supply control means includes:
Power adjusting means for adjusting the amount of power obtained from a commercial power source or a secondary battery and supplying the cooling device;
Open / close frequency detection means for detecting the open / close frequency of the cooling chamber door;
Temperature detecting means for detecting the temperature in the cooling chamber;
Power supply determination means for determining whether or not to reduce the power to be supplied to the cooling device based on the detection result of the switching frequency detection means and the detection result of the temperature detection means;
And a second command means for issuing a power reduction command to the power adjustment means when it is determined that the power to be supplied to the cooling device should be reduced. A refrigeration device that receives a reduction command and reduces the amount of power to be supplied to the cooling device to the minimum required for the operation of the cooling device.   The power supply control means includes a capacity detecting means for detecting a remaining capacity of the secondary battery, and a remaining capacity of the secondary battery based on a detection result of the capacity detecting means after a predetermined time is detected by the first time detecting means. 5. A capacity determining means for determining whether or not the battery has become less than a predetermined capacity, and a third switching means for switching the power supply source of the cooling device to a commercial power source when it is determined that the capacity is less than the predetermined capacity. The refrigeration apparatus described in 1.   The power supply control means detects the passage of a predetermined time before the predetermined time detected by the first time detection means, and the passage of the predetermined time is detected by the third time detection means. And a third command means for issuing a power increase command to the power adjustment means. The power adjustment means receives the power increase command from the third command means and receives a power increase command from the third command means. The refrigeration apparatus according to claim 4 or 5, wherein the refrigeration apparatus is increased to a maximum size within an allowable range of the cooling apparatus.

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