JP2014037919A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerator that suppresses power consumption in a power peak time zone.SOLUTION: A refrigerator comprises: a timer section for measuring time; a control section for controlling operation of the refrigerator on the basis of the time measured by the timer section; an ice making unit for making ice at a predetermined time interval; and an evaporator for generating cool air for cooling a storage space. The control section controls the refrigerator such that the evaporator is defrosted in a time zone excluding a power peak time zone and the ice is made by the ice making unit at a time interval shorter than the predetermined time interval prior to the power peak time zone.

Description

  Embodiments of the present invention relate to a refrigerator.

  Depending on the season and time zone, there is a concern that the power usage rate, that is, the power usage in the jurisdiction area of the power company with respect to the maximum supply capacity of the power company approaches 100%. If the power usage rate approaches 100%, a large-scale power outage may occur. Therefore, it is desirable to suppress the power consumption of the refrigerator during the season and time period and contribute to the reduction of the power usage rate.

  In addition, there is a rate plan that increases the electricity price during the high power usage time period (hereinafter referred to as the power peak time period). In households where such a price plan is applied, the power consumption of the refrigerator during the power peak time period is reduced. It is desirable to keep it in the household.

  By the way, in the conventional refrigerator, defrosting is started when the accumulated operation time of the compressor reaches a certain time. Therefore, since defrosting is performed regardless of the time, defrosting can be performed even during a time period when the power peak is high, so that power consumption increases.

JP 2007-240027 A

  The problem to be solved by the present invention is to provide a refrigerator that suppresses power consumption in a power peak time period.

  The refrigerator of the embodiment cools a storage space, a timekeeping unit that measures time, a control unit that controls the operation of the refrigerator based on the time that the timekeeping unit keeps time, an ice making device that creates ice at regular time intervals, and a storage space A refrigerator including an evaporator that generates cool air, wherein the control unit performs defrosting of the evaporator in a time zone excluding a power peak time zone, and the predetermined time before the power peak time zone The ice making device is controlled to make ice at a time interval shorter than the interval.

Sectional drawing of the refrigerator of embodiment. The figure which shows the relationship between the internal temperature at the time of defrost, and the rotation speed of a compressor. The control block diagram of the refrigerator of embodiment. The flowchart at the time of defrosting implementation of embodiment. Sectional drawing of the refrigerator which hold | maintained the box-shaped container of the modification 4 on the shelf.

  Hereinafter, the refrigerator 100 of this embodiment is demonstrated based on drawing.

(1) Structure of refrigerator 100 First, the structure of the refrigerator 100 of this embodiment is demonstrated.

  As shown in FIG. 1, the refrigerator 100 according to the present embodiment includes a refrigerator main body 1 including a heat insulating box filled with a foam heat insulating material between an outer box that forms an outer shell and an inner box that forms a storage space. The storage space is partitioned into an upper refrigeration space 6 and a lower refrigeration space 7 by a heat insulating partition wall 5. The refrigeration space 6 is a space that is cooled to a refrigeration temperature (for example, 1 to 5 ° C.), and includes a refrigeration chamber 10 and the like in which a mounting shelf 9 and the like are provided. The freezing space 7 is a space cooled to a freezing temperature (for example, −18 to −25 ° C.), and an ice making room 16 having a relatively small volume automatic ice making machine and a small freezing room (not shown) include the refrigerator 100. The freezer compartment 17 is provided below the left and right sides as viewed from the front.

  The opening part of the refrigerator compartment 10 is obstruct | occluded by the refrigerator compartment door 8 pivotally supported by the hinge provided in the upper and lower sides of the refrigerator main body 1 side. The openings of the ice making room 16, the small freezer room, and the freezer room 17 are closed by a drawer type ice making room door 19, a small freezer room door, and a freezer room door 18, respectively. A storage container is held on the back side of these pull-out doors, and is pulled out of the cabinet as the door is opened.

  The machine room 31 at the lower back of the refrigeration space 7 stores a compressor 30, a condenser (not shown), and a heat dissipating fan (not shown) for cooling the compressor 30. Further, in the refrigeration evaporator chamber 27 at the back of the refrigeration space 7, a refrigeration evaporator 28, a refrigeration fan 29 for sending cold air generated in the refrigeration evaporator 28 to the refrigeration space, and defrosting described later are provided. The defrosting heater 33 to perform is accommodated. Further, in the refrigeration evaporator chamber 22 on the back of the refrigeration space 6, a refrigeration evaporator 23, a refrigeration fan 24 for sending cold air generated in the refrigeration evaporator 23 to the refrigeration space, and defrosting described later are provided. The defrosting heater 32 to perform is accommodated.

  In the cooling cycle of the refrigerator 100, a condenser (not shown) and a throttle device are connected, the throttle device is connected to a freezing evaporator 28 and a refrigeration evaporator 23, and the freezing evaporator 28 and the refrigeration evaporator 23 are compressors. 30 is configured.

  Moreover, the refrigerator 100 of this embodiment is provided with a mist generator. The mist generator generates a mist of charged fine particles by applying a high voltage to water in a water supply tank (not shown) provided in a section of the refrigerated space 10 and discharges it into the refrigerated space 10. With this mist, effects such as suppression of mold in the refrigerated space 10, deodorization, and prevention of damage to stored items can be obtained.

  In addition, the refrigerator 100 according to the present embodiment includes an outside lighting 35 that illuminates the feet of the refrigerator 100 on the front side at the bottom of the refrigerator body 1. Specifically, an LED substrate 34 is provided in the lower portion of the refrigerator body 1, and an LED 35 that serves as external lighting is connected to the LED substrate 34. When the LED 35 is energized through the LED substrate 34, the LED 35 emits light and illuminates its surroundings. The outside lighting (LED 35) may illuminate a place other than the feet of the refrigerator 100 according to the usage environment of the refrigerator 100, and may be provided in a place suitable for that purpose.

  Further, the refrigerator 100 of the present embodiment includes an operation panel 41 on the front surface of the refrigerator compartment door 6. The operation panel 41 includes operation means such as operation buttons 42 for instructing the refrigerator 100 on a control method and the like, and display means for displaying the operation status of the refrigerator 100 and the like. A part of the operation panel 41 is clearly shown with a higher illuminance than other parts by panel illumination. For example, in order to make the character portion of the display means bright, panel illumination, for example, an LED is arranged on the back side of the surface plate of the operation panel 41. Moreover, the character part of the surface plate is made translucent. When the LED is energized to emit light, the characters appear bright and bright from the front side of the surface plate.

  The refrigerator 100 according to the present embodiment includes an operation unit 38 including an operation microcomputer on the operation panel 41. As shown in FIG. 3, the operation unit 38 communicates with a control unit 39 including a control microcomputer. The operation unit 39 is connected to a time measuring unit 43 that measures time, a battery 44 that is a power source when power is not supplied from an external power source, an operation button 42, and the like. The timer unit 43 keeps track of the current time, and the time information is transmitted to the control unit 39 through the operation unit 38. The control unit 39 controls the refrigerator 100 based on the time information from the time measuring unit 43. For example, an RTC (real time clock) is used as the timer unit 43. When the RTC is used, the operation unit 38 may incorporate the RTC.

  A user instruction input from the operation button 42 or the like is transmitted to the operation unit 38, and further transmitted from the operation unit 38 to the control unit 39. The control unit 39 controls the refrigerator 100 based on the transmitted instruction. For example, when the user presses the operation button 42 of the operation panel 41 to instruct the operation in the power saving mode in which the power consumption of the entire refrigerator 100 is reduced, the instruction is transmitted to the control unit 39. Upon receiving the instruction, the control unit 39 performs the operation in the power saving mode by, for example, suppressing the rotation speed of the compressor 30. Further, the control status by the control unit 39 is transmitted to the operation unit 38 and displayed on the display means of the operation panel 41.

  The refrigerator 100 of the present embodiment includes an ice making device 50. The ice making device 50 includes a water supply tank 51 provided in the refrigerator compartment 10, an ice making tray 52 partitioned into a plurality of ice making blocks provided in the upper part of the ice making chamber 16, and water in the water supply tank 51. And a water supply pump 53 to be sent to 52.

  In addition, the refrigerator 100 of the present embodiment includes a storage space in the refrigerated space 6 that can store cold storage means such as ice 64. Specifically, a shelf 60 on which cold storage means such as ice 64 can be placed above the water supply tank 51 is provided. The shelf 60 is a horizontal flat plate. Two protrusions 61 and 61 extending in parallel with the width direction of the refrigerator 100 are formed near the front portion of the shelf 60. A holding plate 62 is fitted between the protrusions 61 and 61. The shelf 60, the protrusion 61, and the holding plate 62 form a storage space for the cold storage means. As shown in FIG. 1, when the ice 64 made by the ice making device 50 is placed on the shelf 60, the holding plate 62 serves as a holding unit that holds the ice 64 on the cold storage unit shelf 60. And the ice 64 hold | maintained at the shelf 60 plays the role of the cool storage means which cools the refrigerator space 6 at the time of a power failure.

(2) Operation Next, the operation of the refrigerator 100 of the present embodiment will be described.

  The cooling cycle of the refrigerator 100 described above generates cold air as follows. First, the refrigerant that has been pressurized by the compressor 30 and becomes a high-temperature / high-pressure gas dissipates heat and liquefies with the condenser at a high pressure. When the refrigerant passes through the expansion device, the pressure is reduced and the boiling point is lowered. The refrigerant evaporates and absorbs heat in the refrigeration evaporator 28 and the refrigeration evaporator 23, thereby generating cold air around the refrigeration evaporator 28 and the refrigeration evaporator 23.

  If the cooling cycle is operated continuously for a long time, the refrigeration evaporator 28 and the refrigeration evaporator 23 may be frosted, and the cooling function may be reduced. Therefore, the cooling device is stopped and defrosting is performed as follows.

  FIG. 2 shows changes in the temperature of the freezing space 7, the temperature of the refrigerated space 6, and the rotation speed of the compressor 30 with respect to the elapsed time before and after the defrosting of the evaporator 28 for freezing. First, before the defrost heater 33 is energized, the cooling cycle for operating the cooling space 7 to cool the refrigeration space 7 by operating the rotation speed of the compressor 30 higher than normal is set to lower the temperature of the refrigeration space 7 below the normal set temperature. . This is performed in order to suppress as much as possible the temperature rise of the freezing space 7 due to defrosting described below.

  Next, the compressor 30 is stopped, the defrost heater 33 is energized, and the frost adhering to the refrigeration evaporator 28 is melted and removed by the generated heat. Meanwhile, the temperature of the freezing space 7 and the refrigerating space 6 rises due to the effect of stopping the compressor 30 and stopping the cooling cycle and heating the defrost heater 33.

  When energization to the defrost heater 33 is finished, the compressor 30 is operated at a higher rotational speed than usual, a cooling cycle for cooling the freezing space 7 and the refrigerating space 6 is operated, and the temperatures of the freezing space 7 and the refrigerating space 6 are operated. Lower. Similarly, when defrosting the refrigeration evaporator 23, the refrigeration space 6 is first cooled, then the frost of the refrigeration evaporator 23 is removed, and finally the refrigeration space 7 and the refrigeration space 6 are cooled.

  As described above, during defrosting, the defrosting heaters 32 and 33 are energized and the rotational speed of the compressor is increased, so that more power is consumed than during normal operation.

  The ice making device 50 makes ice as follows. First, a predetermined amount of water is supplied from the water supply pump 53 to the ice tray 52 and cooled to become ice 64. The ice tray 52 is provided with a temperature sensor, which detects that the ice 64 has been completed. Then, the ice tray 52 rotates 180 degrees, and the ice 64 falls into the ice making chamber 16. After the ice 64 falls, the ice tray 52 rotates 180 degrees, and water is supplied again into the ice tray 52. The ice making chamber 16 is provided with a sensor for detecting the amount of ice 64. When the ice making chamber 16 is full of ice, a signal is sent from the sensor that detects this to the control unit 39 described later, and the ice tray 52 is not rotated by an instruction from the control unit 39, and ice making stops. Since the ice tray 52 is rotated at regular time intervals, a certain number of ice is made at regular time intervals.

(3) Control method of defrost operation Next, the defrost operation in the refrigerator 100 of this embodiment is demonstrated.

  The refrigerator 100 according to the present embodiment performs defrosting during a time period excluding the power peak time period, and does not perform defrosting during the power peak time period. More specifically, in principle, defrosting is started when the accumulated operation time of the compressor 30 reaches a certain time. However, during the power peak time period, the accumulated operation time of the compressor 30 is a certain time. Even if it becomes, defrosting does not start. The implementation method will be described with reference to the flowchart of FIG. A power peak time zone, for example, a time zone from 10 to 17:00 is stored in the control unit 39 in advance.

  First, when the compressor 30 starts operation, the control unit 39 starts integrating the operation time (S1). And when the integration operation time of the compressor 30 becomes a fixed time (Yes in S2), if the time transmitted from the time measuring unit 43 to the control unit 39 is out of the power peak time zone (No in S3), The controller 39 performs defrosting (S4), and resets the accumulated time when the defrosting is completed (S5). On the other hand, when the accumulated operating time of the compressor 30 reaches a certain time (Yes in S2), if the time transmitted from the time measuring unit 43 to the control unit 39 is within the power peak time zone, the control unit 39 The defrosting is not started immediately (S6), and when the time transmitted from the time measuring unit 43 to the control unit 39 passes the power peak time zone (Yes in S7), the defrosting is performed (S4). When is completed, the accumulated time is reset (S5).

  Here, the power peak time zone may be stored in the control unit 39 at the manufacturing stage of the refrigerator 100, or may be determined by being input by the user on the operation panel 41. The power peak time zone may change depending on the era, season, region, etc. However, if the user of the refrigerator 100 can input and determine the time at which defrosting should be started on the operation panel 41, these Can respond to changes.

(4) Control method of ice making operation Next, the ice making operation in the refrigerator 100 of the present embodiment will be described.

  The refrigerator 100 according to the present embodiment controls ice making based on the time when the timer 43 measures time, and produces more ice 64 than during normal operation before the power peak time period starts. This is achieved by making the ice making time interval shorter than a normal fixed time interval. The power peak time zone is stored in the control unit 39 in advance. This time zone may be stored at the manufacturing stage of the refrigerator 100 or may be stored when the user inputs the operation panel 41. When the time transmitted from the time measuring unit 43 approaches the time zone, for example, when the time reaches 8 o'clock 2 hours before 10 o'clock, the control unit 39 increases the rotation speed of the compressor 30. Then, since the cooling device operates at a high speed, the temperature of the ice making chamber 16 decreases. Therefore, the water in the ice tray 52 becomes ice 64 in a short time. Since the ice 64 is completed in a short time, the control unit 39 shortens the time interval of rotation of the ice tray 52. As a result, the newly made ice 64 falls into the ice making chamber 16 at a time interval shorter than the normal time interval. The ice making capacity of a general household ice making device is about 10 pieces in 2 hours, but the ice making ability in the case of performing the above control by the control unit 39 is about 10 pieces in an hour, which is a double number. Of ice 64 can be produced.

  Even after entering the power peak time zone, it is desirable to continue making ice with the ice making device 50 as long as the ice making chamber 16 does not become full ice.

  If a power failure occurs, the ice 64 made as described above is taken out of the ice making chamber 16 and placed in the shelf 60 in the refrigerated space 6 to be used as a cold storage means.

(5) Control methods other than defrosting operation and ice making operation Next, control methods other than the defrosting operation and ice making operation will be described in order.

  First, in the present embodiment, the control unit 39 causes the mist generating device to generate mist regardless of the time zone. In that case, the operation of the mist generator is continued even during the power peak period.

  Moreover, the control part 39 turns off the panel illumination of the operation panel 41 during the midnight time slot | zone when a user generally sleeps, for example, 1-5 o'clock. Specifically, when the time of the time measuring unit 43 becomes 1 o'clock, for example, the control unit 39 turns off the panel illumination. And when the time of the time measuring part 43 becomes 5:00, for example, the control part 39 turns on panel illumination.

  In addition, the control unit 39 turns on the outside lighting 35 during a midnight time zone where the user generally sleeps, for example, 1 to 5 o'clock, and turns off the other time zone. Specifically, when the time of the time measuring unit 43 becomes midnight, for example, 1 o'clock, the control unit 39 controls the LED substrate 34 to turn on the outside illumination 35. And when the time of the time measuring part 43 becomes morning, for example, 5:00, the control part 39 controls the LED board 34, and turns off the exterior illumination 35.

  Note that the midnight time zone in which the panel illumination is turned off and the midnight time zone in which the exterior lighting 35 is turned on may be different time zones.

(6) Effect According to the refrigerator 100 described above, since defrosting is avoided during the power peak time zone, power consumption during this time zone can be suppressed.

  In addition, since a large amount of ice 64 is manufactured before the power peak time period starts, the ice 64 in the ice making room 16 can be used for various purposes in the event of a planned power outage or large-scale power outage. For example, it can be used for a normal use such as putting it in a drink, or when it is desired to cool an object, it can be cooled by applying ice 64 instead of being cooled in the refrigerator 100. Furthermore, by placing the ice 64 on the shelf 60 in the refrigerated space 6 as a cold storage means, the air in the refrigerated space 6 is cooled by the ice 64, and the temperature in the refrigerated space 6 can be kept at the refrigerated temperature. Even if there is no power outage, the ice making chamber 16 is filled before the power peak time period, so that the ice making device 50 is prevented from operating during the power peak time period, thereby saving power during that time period. Can contribute.

  Further, even if the ice making chamber 16 does not become full even after entering the power peak time period, if ice making is continued with the ice making device 50, a larger amount of ice 64 is prepared in case of a power failure. Can be prepared.

  Further, if the operation of the mist generator is continued during the power peak time, even if the cooling cycle is stopped and the temperature in the refrigerated space 6 rises due to a power failure, food in the refrigerated space 6 is prevented from being damaged. Can do.

  In addition, in the midnight hours when the refrigerator 100 is not used, power is wasted even if the panel lighting is turned on, but if the panel lighting is turned off in the midnight hours, the waste of power can be eliminated.

  If the outside lighting 35 is turned on at midnight, the outside lighting 35 functions as a night light. For example, when a user who wakes up at midnight and wants to put out an object in the refrigerator 100, It is possible to reach the refrigerator 100 without hitting an object in the dark.

(7) Modification example (Modification example 1)
Modification 1 of the above embodiment will be described.

  In the first modification, the defrosting is performed at a specific time regardless of the accumulated operation time of the compressor 30. Also by this, defrosting can be performed in the time zone except the power peak time zone. In this method, the time to start defrosting is stored in the control unit 39 in advance. When the time transmitted from the time measuring unit 43 to the control unit 39 coincides with the time at which the defrosting should be started, the control unit 39 that recognizes the time turns on the rotational speed of the compressor 30 and the energization to the defrosting heater 33. Is controlled, and defrosting is performed as described above. Here, the time when defrosting should be started is the time of the time zone excluding the power peak time zone. For example, if 10-10 o'clock in the daytime is the power peak time zone, it is set to any time in the time zone from 17:00 to 10 o'clock the next day excluding that time zone. During the day when the outside air temperature is particularly low, for example, from 2 to 6 o'clock, the temperature rise in the refrigerator 100 due to defrosting can be suppressed due to the influence of the low outside air temperature. Less power is consumed to restore the temperature in the refrigerator 100. Therefore, the time when defrosting should be started is better when the time is in this time zone. The time at which the defrosting should be started may be stored in the manufacturing stage of the refrigerator 100, or may be determined by the user inputting the operation panel 41. The power peak time zone may change depending on the era, season, region, and the like. Therefore, if the user can input and determine the time at which defrosting should be started on the operation panel 41, it may be possible to cope with these changes.

(Modification 2)
In the above-described embodiment, ice making is continued during the power peak time period after making more ice 64 than during normal operation before the power peak time period starts, but the ice making is stopped during the power peak time period, It may contribute to reducing power consumption.

  Also, the control of making more ice 64 than during normal operation is not performed before the power peak time period starts, and ice making similar to that during normal operation is continued before entering the power peak time period. Even after entering, the ice making may be continued as in the normal operation until the ice making chamber 16 becomes full. Even in this way, the ice 64 can be prepared for a power failure. If the control for making more ice 64 than during normal operation is not performed before the power peak time period starts, power consumption before the power peak time period starts can be suppressed.

(Modification 3)
In the above embodiment, the ice 64 is used as the cold storage means. However, in addition to the ice 64 or in place of the ice 64, a cooling agent may be used. A cold-retaining agent is a box-like container or sachet filled with a gel-like medicine composed of water, thickener, preservative, pigment, and the like. The cryogen is kept at a low temperature to solidify the drug in the contents, and then placed in a temperature environment higher than the melting point of the drug. Then, the cold storage means cools surrounding objects while increasing the temperature. In particular, at the melting point of the drug, the amount of heat corresponding to the latent heat of melting of the drug is taken from the surroundings, and the surrounding objects are maintained at a temperature near the melting point for a long time. During normal times, the cryogen is cooled in the frozen space 7 and moved to the shelf 60 in the refrigerated space 6 in the event of a power failure.

(Modification 4)
In the above embodiment, the cold storage means is cooled in the freezing space 7, but may be always held on the shelf 60. FIG. 5 shows a state in which a box-shaped container 63 filled with a cooling agent is permanently installed on the shelf 60. Also in this case, since the cold storage means is cooled to the set temperature of the refrigerated space 6, it plays a role of suppressing this when the temperature of the refrigerated space 6 starts to rise. In this case, there is no need to move the cold storage means from the frozen space 7 to the refrigerated space 6. Moreover, since it is not necessary to open the freezer compartment door 18 and the refrigerator compartment door 8 in order to move, it can prevent that the air in the refrigerator compartment 6 or the refrigerator space 7 leaks, and the temperature in a warehouse rises.

(Modification 5)
In the above embodiment, the panel lighting is turned off at midnight, but since the actual time when the user sleeps depends on the lifestyle of the user, the time when the panel lighting is turned off is limited to the midnight time. For example, it may be daytime. In addition, the user may be able to determine the time period during which the panel illumination is turned off by inputting it on the operation panel.

(Modification 6)
The refrigerator 100 of the above embodiment includes two evaporators, but may be a refrigerator that includes only one evaporator. In that case, the cold air generated by one evaporator is sent to both the freezing space 7 and the refrigerating space 10.

(Modification 7)
The above embodiment is an illustration and the scope of the invention is not limited to this. The above embodiments can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the scope of the invention. The above embodiments and modifications thereof are included in the inventions described in the claims and their equivalents.

DESCRIPTION OF SYMBOLS 1 ... Refrigerator main body, 5 ... Partition wall, 6 ... Refrigerated space, 7 ... Freezing space, 8 ... Cold room door, 9 ... Mounting shelf, 10 ... Cold room , 16 ... Ice making room, 17 ... Freezing room, 18 ... Freezing room door, 19 ... Ice making room door, 22 ... Refrigerating evaporator room, 23 ... Refrigerating evaporator, 24 ... Refrigeration fan, 27 ... Refrigeration evaporator chamber, 28 ... Refrigeration evaporator, 29 ... Refrigeration fan, 30 ... Compressor, 32 ... Defrost heater, 33 ... Defrost heater, 34 ... LED board, 35 ... Outside lighting, 38 ... Operation part, 39 ... Control part, 41 ... Operation panel, 42 ... Operation button , 43 ... Time measuring unit, 44 ... Battery, 50 ... Ice making device, 51 ... Water supply tank, 52 ... Ice tray, 53 ... Water supply pump, 60 ... Shelf, 61 ... projections, 62 ... holding plate, 63 ... box-shaped container, 64 ... ice, 100 ... Refrigerator

Claims (8)

A timekeeping unit that measures time, a control unit that controls the operation of the refrigerator based on the time measured by the timekeeping unit, an ice making device that produces ice at regular time intervals, and evaporation that generates cold air that cools the storage space It is a refrigerator comprising a refrigerator, wherein the control unit performs defrosting of the evaporator in a time zone excluding a power peak time zone, and a time interval shorter than the predetermined time interval before the power peak time zone The refrigerator controlled to make ice by the ice making device. The refrigerator according to claim 1, wherein the ice-formed ice cools the storage space. The refrigerator according to claim 1 or 2, wherein the control unit controls the ice making device to make ice even during the power peak time period. The mist generation device which generates mist in the storage space is provided, and the control part controls so that mist is generated by the mist generation device also in the electric power peak time zone. Refrigerator. The refrigerator according to any one of claims 1 to 4, wherein the operation panel is provided with panel illumination, and the control unit performs control so that the panel illumination is turned off at midnight. The refrigerator of any one of Claims 1-5 which equip the outer surface of the main body of the said refrigerator with exterior lighting, and the said control part controls to turn on the said exterior lighting in the said midnight time zone. The refrigerator according to any one of claims 1 to 6, further comprising cold storage means different from the ice made. The refrigerator according to claim 6, wherein the iced ice or the cold storage means is held by a holding means.

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