JP2014074518A - Cooling storage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooling storage capable of easily, reliably and inexpensively shutting down operation during a period when the cooling operation is not necessary.SOLUTION: A cooling storage comprises: a storage room 16 capable of storing a cooled object 25; a cooling device 30 to cool inside the storage room 16; setting means 81 to set an operation unnecessary period when the cooled object 25 is not stored in the storage room 16; a timer 51 to count time; and a cooling device control section 52 which shuts down the cooling device 30 while maintaining power supply to the cooling storage 10 when identifying the operation unnecessary period on the basis of time information counted by the timer 51.

Description

  The present invention relates to a refrigerator having a time during which a cooling operation is unnecessary.

  Conventionally, a cold storage agent is used for cooling and cooling at the time of delivery of a cold-retaining article such as food. In order to use a cool storage agent, it is necessary to freeze the cool storage agent in advance, and as a cooler for that purpose, for example, a cool storage agent freezer as disclosed in Patent Document 1 is known. In general, since the cool storage agent is taken out of the box at the time of delivery of the cold-retaining article and packed together with the article, the cold storage agent (cooling) is stored in the cool storage agent freezer during the delivery time of the cool-requiring article. (Object) may not enter.

JP-A-11-264645

In such a cool storage agent freezer, since it cools to cryogenic temperature, such as about -20 degreeC-about -40 degreeC, in order to freeze a cool storage agent, power consumption is a big thing. On the other hand, it is not preferable to cool the regenerator until it is frozen, due to the recent demand for energy saving. Therefore, when the cool storage agent is not stored in the cool storage agent freezer, the outlet is artificially pulled out to turn off the power, or a timer relay is installed in the cool storage agent freezer. However, every time the cool storage agent runs out of the cabinet, it is very time-consuming to pull out the outlet, and the method using the timer relay is also expensive because the timer relay is expensive and requires a lot of work. There were few.
The present invention has been completed based on the above circumstances, and an object thereof is to provide a refrigerator that can be simply and surely stopped at a low cost during a time when the cooling operation is unnecessary. By the way.

The refrigerator according to the present invention sets a storage room in which a cooling object can be stored, a cooling device for cooling the storage room, and an operation unnecessary time when the cooling object is not stored in the storage room. When it is identified that the operation unnecessary time is based on the time information counted by the setting means, the timer for counting time, and the time information counted by the timer, the cooling device is maintained while maintaining the power supply to the refrigerator. And a cooling device control unit to be stopped.
According to such a configuration, for example, in a refrigerator that temporarily freezes a cooling object such as a regenerator, the cooling operation is not required when there is no cooling object in the storage chamber (specifically, (It may be hours or minutes, or may be a specific time zone), and the cooling device control unit stops the cooling device while maintaining the power supply to the refrigerator at that time. In other words, the cooling operation is automatically stopped, and the power consumption can be suppressed easily and reliably. Further, since a special device such as a timer relay is not required, it can be very inexpensive. The cooling device is exemplified by a compressor, a condenser, a condenser fan (in the case of an air-cooled type), a cooler (evaporator), an internal fan, and other devices used for generating and circulating supply of cold air in a refrigerator. can do.

Further, as means for solving the above-mentioned problems, the following configuration may be adopted.
(1) The cooling device control unit operates the cooling device when identifying that the operation unnecessary time has ended based on the time information counted by the timer.
If comprised in this way, cooling operation can be restarted automatically according to the preset time.
(2) The cooler includes a control unit that controls the operation of the cooler. When the control unit identifies the operation unnecessary time, the operation of the cooler is stopped, and the operation unnecessary time is A configuration in which the operation of the refrigerator is resumed when completed.
If comprised in this way, not only a cooling device but the operation | movement of components other than the cooling device accompanying a cooler can also be stopped, and it is further effective in suppression of power consumption.

(3) The cooling device includes a cooler that cools the storage chamber with a refrigerant, the defrosting device for removing frost attached to the cooler, and the operation unnecessary time is completed. A defrosting control unit that activates the defrosting device, and the cooling device control unit operates the cooling device after the defrosting control unit finishes the defrosting operation. Constitution.
By automatically performing the defrosting operation before resuming the cooling operation, the cooling function of the cooler can be maintained. In addition, by performing the defrosting operation before entering the resumption of the cooling operation, the temperature in the cooler and the storage chamber is higher than that during the cooling operation, so the time taken for the defrosting can be shortened, Since the operating time of the defroster can also be shortened, power consumption can be further suppressed.

(4) When the cooling device control unit identifies that the operation unnecessary time has ended, the cooling device control unit performs a dehumidifying operation for reducing the humidity in the storage chamber, and the defrosting control unit performs the dehumidifying operation after the dehumidifying operation is completed. The defrosting device is operated, and the cooling device control unit operates the cooling device after the defrosting control unit finishes the defrosting operation.
While the cooling operation is stopped, the humidity in the storage room tends to increase. In addition, for example, a cooling object such as a cold storage agent is often warmed and dewed when not stored in the storage room. For this reason, when the object to be cooled is returned to the storage room for cooling, the humidity in the storage room increases, and if the cooling operation is performed as it is, the cooler becomes frosted and the cooling capacity is lowered. Therefore, after returning the object to be cooled to the storage room, the cooling operation is performed as the dehumidifying operation, and then the defrosting operation is performed, so that the full cooling operation is performed before the full cooling operation is performed. The frost attached to the cooler can be removed by the humidity and the dew adhering to the object to be cooled, and the cooling performance can be sufficiently exhibited during the full-scale cooling operation. Further, since the internal temperature is higher after the dehumidifying operation than when the normal cooling operation is performed, the time required for defrosting can be shortened compared to the case where the defrosting time is performed after the normal cooling operation.

(5) A front opening provided on the front surface of the storage chamber, a heat insulating door that opens and closes the front opening, and a dew prevention heater that is in contact with the heat insulating door and is provided on an outer edge of the storage chamber. A heater control unit that controls the operation of the dew prevention heater, and the heater control unit controls the dew prevention heater while the cooling device control unit stops the cooling device. Configuration to operate.
Even when the cooling operation is stopped, the temperature in the storage room after the cooling operation is very close to the room temperature at the time of cooling (for example, −20 ° C. or less), so that the temperature difference from the outside is extremely large. For this reason, condensation may occur at the outer edge of the storage chamber with which the heat insulating door abuts, and freezing may occur at that portion. Therefore, even when the operation of the cooling device is stopped, the outer edge portion of the heat insulating door can be prevented from freezing by operating the dew prevention heater.
(6) A configuration in which the cool storage agent is stored in the storage chamber, and the cool storage agent is frozen by circulating the cool air exchanged with the cooler by an internal fan.

  According to the present invention, the operation can be stopped easily and reliably at a low cost during a time when the cooling operation is unnecessary.

The front perspective view which shows the door open state of the cool storage agent freezer which concerns on one Embodiment of this invention. Partial cutaway front view of cold storage freezer Cross section viewed from the side Block diagram showing the control unit of the regenerator freezer Timing chart when stopping the operation of the freezer Timing chart in Embodiment 2 Timing chart in Embodiment 3

<Embodiment 1>
Embodiment 1 of the present invention will be described below with reference to FIGS. In this embodiment, the case where the refrigerator of this invention is applied to a cool storage agent freezer is illustrated.
In FIG. 1 thru | or FIG. 3, the code | symbol 10 is the freezer main body which consists of a vertical heat insulation box body of a front opening, Comprising: While being supported by the leg 11 provided in the four corners of a bottom face, The heat insulating door 13 is supported so as to be able to swing open and close. Further, a dew prevention heater 19 (see FIG. 4) is embedded in the periphery of the front opening 12 (a position where the heat insulating door 13 abuts).
A machine room 14 is provided on the upper surface of the freezer body 10, and a compressor 34, a condenser 35, a condenser fan 36, an electrical box 38, and the like are stored in the machine room 14. An operation panel 80 is provided on the front surface of the machine room 14. The operation panel 80 is provided with various setting buttons 81 and a display unit 82 for displaying information and the like.
In the freezer main body 10, as shown in FIG. 2, a duct panel 15 made of a metal plate such as a stainless steel plate is stretched vertically at a position close to the right side as viewed from the front. About 3/4 of the area on the left side of the storage chamber 16 is the storage chamber 16, and the remaining area on the right side is the cooler chamber 17. The opening on the near side of the cooler chamber 17 is closed by a front plate 18.

  In the storage chamber 16, shelf columns 21 are attached at four convenient locations on the right and left ends of the rear surface and the front end of the left and right side surfaces (the right side surface is the duct panel 15). However, the four corners are received by the shelf receivers 22 attached to the respective shelf columns 21 so that they are arranged at regular intervals in the vertical direction, and the regenerator 25 is stored above each shelf network 23. The storage space 24 is formed over four stages. Each storage space 24 has substantially the same height, and is provided so that the height region in the storage chamber 16 is divided into approximately four equal parts.

The regenerator 25 that is the object to be cooled is stored in the storage space 24 in a form stored in the container 26. The cool storage agent 25 is a known one in which a hardener made of a synthetic resin such as polyethylene is filled with a gelling agent, and has a flat rectangular plate shape as a whole.
A plurality of cool storage agents 25 are accommodated in the container 26 side by side with a slight gap extending between the left and right two rows. Thus, the container 26 which accommodated the cool storage agent 25 is mounted on the shelf network 23, and is accommodated in the storage space 24 along with two in the depth direction as described above.

On the other hand, in the cooler chamber 17, as shown in FIG. 2, a cooler 31 is disposed in the lower region. A suction port 32 is formed in the duct panel 15 at a position corresponding to the front surface of the cooler 31. An internal fan 33 is mounted in an area above the suction port 32 in the duct panel 15.
The cooler 31 is circulated and connected by a compressor 34 and a condenser 35 stored in a machine room 14 provided on the upper surface of the freezer main body 10 and a refrigerant pipe 37 to constitute a known refrigeration cycle. .
The basic cooling operation is performed by driving the cooling device 30 such as the compressor 34, the condenser 35, the condenser fan 36, the cooler 31, and the internal fan 33, and the warehouse sucked through the suction port 32. While the internal air passes upward through the cooler 31, cold air is generated by heat exchange, and a circulating flow is generated in which this cold air is blown from the internal fan 33 to the storage chamber 16, and is stored on the shelf network 23. The regenerator 25 thus cooled is cooled (frozen). In this embodiment, in order to freeze the cool storage agent 25, the inside of the storage chamber 16 is cooled from about -20 ° C to about -40 ° C.

  Thus, in order to lower the internal temperature to an extremely low temperature range of about −40 ° C., the cooler 31 needs to be maintained in a corresponding low temperature state, and it can be said that frost formation is likely to occur. Therefore, the defrosting operation is performed as appropriate, and a defrost heater 39 made of a sheathed heater is mounted on the lower surface and the front surface of the cooler 31. The defrost heater 39 functions as a defrosting device.

  Now, as a device for controlling the compressor 34 and the like, a control unit 50 including a microcomputer and a timer and executing a predetermined program is provided (see FIG. 4). The control unit 50 is accommodated in the electrical box 38 and connected to the operation panel 80. A setting button 81 as a setting unit is connected to the input side of the control unit 50. On the output side of the control unit 50, a cooling device 30 such as a compressor 34, a condenser fan 36, and an internal fan 33, a defrost heater 39, a dew prevention heater 19, and a display unit 82 are connected. Yes.

  The control unit 50 includes a timer 51, a cooling device control unit 52, a defrosting control unit 53, a heater control unit 54, and a storage unit 55. The operation stop time T1 and the operation start time T2 can be input by the setting button 81, and the storage unit 55 stores the input times and the like. The timer 51 counts the current time, and when each time stored in the storage unit 55 comes, it stops and operates the device in conjunction with each control unit.

  The cooling device control unit 52 controls the operation of the cooling device 30. During the normal cooling operation, the compressor 34, the condenser fan 36, and the internal fan 33 are controlled by the cooling device controller 52, and the internal temperature is maintained in the vicinity of the set temperature. When the time indicated by the timer 51 is the operation stop time T1 stored in the storage unit 55 and the operation unnecessary time is reached, the cooling device control unit 52 operates the compressor 34, the condenser fan 36, and the internal fan 33. Stop. When the cooling start time T3 is reached, the cooling device controller 52 restarts the operation of the compressor 34, the condenser fan 36, and the internal fan 33, and the compressor 34 and the like cool down to the set temperature.

The defrosting control unit 53 controls on / off of the defrosting heater 39, and when the defrosting start condition such as the operation start time T2 stored in the storage unit 55 is satisfied, the time indicated by the timer 51 is satisfied. The defrost heater 39 is turned on. The defrosting control unit 53 turns off the defrosting heater 39 when the defrosting termination condition such as the defrosting of the cooler 31 is completed is satisfied.
The heater control unit 54 controls on / off of the dew prevention heater 19, and the control unit 50 controls on / off of the display unit 82 and the like. When the time indicated by the timer 51 reaches the operation stop time T1 stored in the storage unit 55, the heater control unit 54 and the control unit 50 turn off the dew prevention heater 19 and the display unit 82 and the time indicated by the timer 51. When the operation start time T2 stored in the storage unit 55 is reached, the dew prevention heater 19 and the display unit 82 are turned on.

Next, an example of the operation of this embodiment will be described with reference to the timing chart of FIG.
In this example, the time at which the cold storage agent 25 is taken out every day and the operation is stopped is set as the operation stop time T1 with the setting button 81 in advance, and the time at which the defrosting is started before the cooling of the cold storage agent 25 is started. The operation start time T2 is set. Moreover, the timing which complete | finishes defrosting and starts cooling is made into cooling start time T3. Between the operation stop time T1 and the operation start time T2, it is an operation unnecessary time, and is a time zone in which the cold storage agent 25 is not stored in the storage chamber 16. The cool storage agent 25 may be stored in the storage chamber 16 at the start of defrosting (operation start time T2) or may be stored before the cooling start time T3.

When the regenerator 25 is stored in the storage chamber 16, the compressor 34 and the condenser fan 36 are operated to generate cold air in the cooler 31, and the internal fan 33 stores the generated cold air in the storage chamber 16. The cooling operation is performed by blowing the inside. When the internal temperature becomes close to the set temperature, the compressor 34 and the condenser fan 36 are repeatedly turned on and off, so that the internal temperature is maintained near the set temperature, and the internal fan 33 continues to operate. Do cool air circulation. During this time, the dew prevention heater 19 is turned on to prevent condensation and freezing on the surface where the heat insulating door 13 and the freezer main body 10 abut. In addition, the display unit 82 appropriately displays the internal temperature and the like.
And when the cool storage agent 25 is taken out outside and the set operation stop time T1 is reached, the operation of the cooling device 30 such as the compressor 34, the condenser fan 36 and the internal fan 33 is stopped, and the dew prevention heater 19, the display unit 82 and the like are also stopped, and power supply to the freezer main body 10 is performed, but other than the control unit 50 is stopped. Less.

Thereafter, when the operation unnecessary time ends and the operation start time T2 is reached, the operation of the dew prevention heater 19 and the like is resumed, the defrosting heater 39 is turned on by the defrosting control unit 53, and the defrosting of the cooler 31 is performed. Is done. In addition, the display unit 82 displays that the defrosting is in progress.
When the defrosting of the cooler 31 is finished and the cooling start time T3 is reached, the defrosting heater 39 is turned off by the defrosting control unit 53, and the compressor 34, the condenser fan 36, and the internal fan are turned off by the cooling control unit 52. The operation of 33 is resumed, and the cooling operation is resumed.

As described above, according to the present embodiment, by setting the operation stop time T1 and the operation start time T2 in advance, during the cooling operation unnecessary time when the regenerator 25 is taken out of the refrigerator, the freezer body Although the power supply to 10 is performed, the operation of the cooling device 30 and the like can be stopped. Therefore, power consumption can be reduced.
Further, by performing the defrosting operation before restarting the cooling operation, the time required for defrosting can be shortened, and the power required for defrosting can also be reduced.
In this embodiment, the operation stop time T1 and the work start time T2 are set in advance as the setting of the operation unnecessary time. However, the operation stop time T1 and the cooling start time T3 are set, and the set cooling start is set. You may make it an apparatus restart an operation | movement from the operation start time T2 which deducted the time concerning defrosting from the time T3.

<Embodiment 2>
Next, a second embodiment of the present invention will be described with reference to FIGS. This embodiment is different from the first embodiment in that the dehumidifying operation is performed before the defrosting operation. In the following second embodiment, members similar to those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and illustration and description thereof are omitted.
This embodiment will be described with reference to the block diagram of FIG. In the present embodiment, the operation of the cooling device 30 or the like is stopped when the operation stop time T10 is reached. When the time counted by the timer 51 reaches the operation start time T20 stored in the storage unit 55, the cooling device control unit 52 resumes the operation of the compressor 34, the condenser fan 36, and the internal fan 33, and the storage chamber 16 By cooling the inside, the humidity in the storage chamber 16 is lowered. When the cooling operation (dehumidifying operation) is performed for 1 hour and the defrosting start time T30 is reached, the cooling device controller 52 stops the operation of the compressor 34, the condenser fan 36, and the internal fan 33. When the defrosting operation is finished and the cooling start time T40 is reached, the cooling device control unit 52 restarts the operation of the compressor 34, the condenser fan 36, and the internal fan 33, and the cooling operation is performed.
The defrosting control unit 53 turns on the defrosting heater 39 when the defrosting start condition such as the defrosting start time T30 is satisfied. Moreover, the defrosting control part 53 will turn off the defrosting heater 39, if defrosting completion conditions, such as completion | finish of the defrosting of the cooler 31, are satisfy | filled.

Next, an example of the operation of the present embodiment will be described with reference to the timing chart of FIG.
In this example, the time when the cool storage agent 25 is taken out every day to stop operation is set as the operation stop time T10 in advance with the setting button 81, and after the cool storage agent 25 is stored in the storage chamber 16, the dehumidifying operation is started. The time is preset by the setting button 81 as the operation start time T20. Moreover, the timing which complete | finishes dehumidification operation and starts defrosting operation is made into defrosting start time T30, and the timing which complete | finishes defrosting and starts cooling is made into cooling start time T40.

After the cooling operation is performed, the regenerator 25 is taken out of the warehouse, and when the set operation stop time T10 is reached, the operation of the cooling device 30 such as the compressor 34, the condenser fan 36, and the internal fan 33 is stopped. The dew prevention heater 19, the display unit 82, and the like are also stopped, and power is supplied to the freezer main body 10, but the parts other than the control unit 50 are stopped and apparently no power is turned on.
Thereafter, when the operation unnecessary time ends and the cool storage agent 25 is stored in the storage chamber 16 and the operation start time T20 is reached, the operation of the dew prevention heater 19 and the like resumes, and the compressor 34 and the condenser fan are dehumidified. The operation of 36 and the internal fan 33 is resumed, and the cooling operation is performed for 1 hour.

When the dehumidifying operation is finished and the humidity in the storage room decreases and the defrosting start time T30 is reached, the defrosting heater 39 is turned on by the defrosting control unit 53 and the defroster of the cooler 31 is performed. In addition, the display unit 82 displays that the defrosting is in progress.
When the defrosting of the cooler 31 is completed and the cooling start time T40 is reached, the defrosting heater 39 is turned off by the defrosting control unit 53, and the compressor 34, the condenser fan 36, and the warehouse are turned off by the cooling device control unit 52. The operation of the inner fan 33 resumes and the cooling operation resumes.

As described above, according to the present embodiment, after the cool storage agent 25 is stored in the storage chamber 16, the humidity in the cabinet increases due to dew etc. adhering to the cool storage agent 25, but before performing the cooling operation. By performing the dehumidifying operation (cooling operation for a short time), the humidity in the storage chamber 16 can be lowered. Moreover, the frost of the cooler 31 adhering during the dehumidifying operation can be removed by performing the defrosting operation before the full-scale cooling operation is performed, and the cooling performance is sufficiently exhibited during the full-scale cooling operation. can do. Also, since the internal temperature at the start of defrosting is higher than when normal cooling operation is performed, the time required for defrosting is shortened compared to when defrosting during normal cooling operation or immediately after cooling operation. You can also
In this embodiment, the cooling operation is performed for 1 hour as the dehumidifying operation. However, the time for performing the cooling operation is a time during which the internal humidity can be lowered and the internal temperature does not decrease to the set temperature. It can be determined as appropriate within the range. Further, the time may be changed in summer when there is much dew adhesion and in winter when there is little dew adhesion.

<Embodiment 3>
Next, Embodiment 3 of the present invention will be described with reference to FIGS. This embodiment is different from the first embodiment in that the dew prevention heater 19 is on during the cooling operation unnecessary time. In the following third embodiment, members similar to those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and illustration and description thereof are omitted.
This embodiment will be described with reference to the block diagram of FIG. In the present embodiment, the heater control unit 54 does not stop the operation of the dew prevention heater 19 even when the time indicated by the timer 51 reaches the operation stop time T100 stored in the storage unit 55, and the dew prevention heater 19. Is kept on.

Next, an example of the operation of the present embodiment will be described with reference to the timing chart of FIG.
In this example, the time at which the cold storage agent 25 is taken out daily to stop the operation is set as the operation stop time T100 in advance with the setting button 81, and the time at which the defrosting is started before the cooling of the cold storage agent 25 is started. It is preset as the operation start time T200. The timing at which the defrosting is finished and the cooling is started is a cooling start time T300. A period between the operation stop time T100 and the operation start time T200 is an operation unnecessary time, and is a time zone in which the regenerator 25 is not stored in the storage chamber 16.

  While the cooling operation is performed, the dew prevention heater 19 is turned on to prevent condensation on the surface where the heat insulating door 13 and the freezer body 10 abut. Then, when the regenerator 25 is taken out and the set operation stop time T100 is reached, the operation of the cooling device 30 such as the compressor 34, the condenser fan 36, and the internal fan 33 is stopped, and the display unit 82 and the like. Is also stopped, while the dew prevention heater 19 remains on.

  Thereafter, when the operation unnecessary time ends and the operation start time T200 is reached, the defrosting heater 39 is turned on by the defrosting control unit 53 and the defroster of the cooler 31 is performed. In addition, the display unit 82 displays that the defrosting is in progress. When the defrosting of the cooler 31 is completed and the cooling start time T300 is reached, the defrosting heater 39 is turned off by the defrosting control unit 53, and the compressor 34, the condenser fan 36, and the inside of the refrigerator are turned off by the cooling device control unit 52. The operation of the fan 33 is resumed and the cooling operation is resumed.

As described above, according to the present embodiment, even when the operation of the cooling device 30 is stopped (during the standby state where the operation of the regenerator freezer main body 10 seems to be stopped), The sticking prevention heater 19 is operated. Even while the operation of the cooling device 30 is stopped, the inside of the cabinet after the operation is initially -20 ° C. or less, so the temperature difference from the outside of the cabinet is extremely large. Therefore, condensation may occur at the outer edge of the storage chamber 16 (the position where the outer edge of the front opening 12 contacts the heat insulating door 13). Therefore, even when the operation of the cooling device 30 is stopped, by operating the dew prevention heater 19, it is possible to prevent freezing of the periphery of the front opening 12 (position where the heat insulating door 13 abuts). it can.
Note that the present embodiment can also be applied to the case where the dehumidifying operation is performed before the defrosting operation as in the second embodiment. Also, in other operation control, if there is a time during which the operation of the cooling device 30 is stopped, the dew prevention heater can be operated during this time as in this embodiment.

<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In the above-described embodiment, an example in which the present invention is applied to a cold storage agent freezer has been described. However, a cooling operation is unnecessary because the cooling target is not stored in the storage room for a certain period of time (for example, 2-3 hours or longer). The present invention can be applied to other refrigerators as long as the refrigerator has a long time.
(2) In the above embodiment, the regenerator 25 is stored in the storage chamber 16 in a form stored in the container 26, but may be stored in a rack or the like. Moreover, although the cool storage agent 25 is a thick plate type hard case type, it may be a sheet. In that case, the regenerator may be stored on a hanger or the like.

(3) In the above embodiment, the defrosting operation or the like is performed before the cooling start time. However, the cooling operation may be performed immediately after the operation unnecessary time without performing the defrosting operation.
(4) In the above embodiment, the restart time of the cooling operation is also set. However, when the cooling start time of the cool storage agent 25 varies depending on the delivery amount or the like, the restart of the cooling operation is not set. You may make it restart by performing operation of the setting button 81 each time.
(5) In the above embodiment, the setting of the operation unnecessary time is made the same every day. However, the set time may be divided for weekdays and weekends, or may be divided for each day of the week.
(6) In the above-described embodiment, the operation unnecessary time is set by the time, but a setting method using a time zone of how many hours after the setting time may be used. In this case, the restart time may be set in the form of how many hours later. In that case, the timer 51 may count the elapsed time.

(7) In the above embodiment, the defroster 39 is used as the defrosting device, but other defrosting methods such as an off-cycle method and a hot gas method may be used.
(8) In the above embodiment, the internal fan 33 is controlled in two stages, on and off, but the air volume may be adjusted as appropriate. Further, when the compressor 34 and the condenser fan 36 are stopped, the internal fan 33 may also be stopped.
(9) In the above embodiment, the position of the cooler 31 is the lower part of the cooler chamber 17.
(10) In the above embodiment, the compressor 34 and the condenser fan 36 are controlled by turning on and off, but inverter control may be used.

DESCRIPTION OF SYMBOLS 10 ... Freezer body 13 ... Heat insulation door 16 ... Storage room 25 ... Cold storage agent 30 ... Cooling device 31 ... Cooler 33 ... Inside fan 34 ... Compressor 35 ... Condenser 36 ... Condenser fan 39 ... Defrost heater 50 ... Control unit 51 ... Timer 52 ... Cooling device control unit 53 ... Defrost control unit 54 .. Heater control unit 55 ... Memory unit 80 ... Operation panel 81 ... Setting button

Claims (5)

A storage room for storing objects to be cooled;
A cooling device for cooling the storage chamber;
Setting means for setting an operation unnecessary time when the object to be cooled is not stored in the storage chamber;
A timer that counts the time,
A cooling device comprising: a cooling device control unit that stops the cooling device while maintaining power supply to the cooling device when it is identified as the operation unnecessary time based on the time information counted by the timer .   The said cooling device control part is a refrigerator of Claim 1 which operates the said cooling device, if it identifies that the said operation unnecessary time was complete | finished based on the time information counted by the said timer. The cooling device includes a cooler that cools the storage chamber with a refrigerant;
A defroster for removing frost adhering to the cooler;
When it is identified that the operation unnecessary time has ended, a defrost control unit that operates the defrosting device, and
The said cooling device control part is a refrigerator of Claim 2 which operates the said cooling device after the said defrost control part complete | finishes a defrost operation. When the cooling device control unit identifies that the operation unnecessary time has ended, it performs a dehumidifying operation to lower the humidity in the storage room,
The defrosting control unit operates the defrosting device after the dehumidifying operation is completed,
The said cooling device control part is a refrigerator of Claim 3 which operates the said cooling device after the said defrost control part complete | finishes a defrost operation. A front opening provided in front of the storage chamber;
A heat insulating door for opening and closing the front opening;
A dew prevention heater in contact with the heat insulating door and provided at an outer edge of the storage chamber;
A heater control unit for controlling the operation of the dew prevention heater,
The said heater control part is a refrigerator of any one of Claim 1 thru | or 4 which operates the said dew prevention heater also while the said cooling device control part has stopped the said cooling device.

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