JP2019203634A - Cooling storage - Google Patents

Abstract

To notify that a cooling storage is in a power-saving state, regardless of whether a rotational frequency of a compressor is variable.SOLUTION: A refrigerator 1 comprises: a storage body 11 having a heat insulating door 12 and an evaporator 25; a refrigeration circuit 21 having a compressor 22; an internal thermistor 30 that detects an internal temperature; a control unit 18; and an economical display unit 45. In the refrigerator 1, the control unit 18 executes a cooling operation of operating a compressor 22 to cool the inside of the refrigerator, in which when the internal temperature detected by the internal thermistor 30 drops to a predetermined lower limit temperature, the compressor 22 is stopped, and then when the internal temperature rises to a predetermined upper limit temperature, the operation of the compressor 22 is resumed, and a notification process of lighting the economical display unit 45 when the inside temperature is lowered to a setting temperature between the upper limit temperature and the lower limit temperature.SELECTED DRAWING: Figure 6

Description

  The technology disclosed in this specification relates to a cold storage.

  2. Description of the Related Art Conventionally, there is known a cooling storage that notifies that when a power saving state is entered (see, for example, Patent Document 1). Specifically, the refrigerator described in Patent Document 1 (corresponding to a cooling storage) includes a compressor having a variable number of revolutions per unit time (hereinafter simply referred to as the number of revolutions), and compresses based on the internal temperature. Change the speed of the machine. The refrigerator has a reference rotational speed set according to the temperature outside the storage room, and turns on the eco-mark when the rotational speed of the compressor is lower than the reference rotational speed.

JP2012-42134A

  However, the technique described in Patent Document 1 is based on the premise that the rotational speed of the compressor is variable, and cannot be applied to a constant speed compressor having a constant rotational speed. For this reason, the eco-mark cannot be turned on in the case of a constant speed compressor, and the user cannot be aware of power saving.

  The present specification discloses a technique capable of notifying that the power saving state is established regardless of whether or not the rotation speed of the compressor is variable.

  The cooling storage disclosed in the present specification includes a storage body having an opening / closing door, a refrigeration circuit having a compressor and an evaporator, a temperature sensor for detecting the internal temperature, a control unit, and a notification unit, The control unit is a cooling operation in which the compressor is operated to cool the interior, and when the interior temperature detected by the temperature sensor falls to a predetermined lower limit temperature, the compressor is stopped, and thereafter When the internal temperature rises to a predetermined upper limit temperature, the cooling operation resumes the operation of the compressor, and when the internal temperature decreases to a predetermined temperature between the upper limit temperature and the lower limit temperature, the notification unit saves power. And a notification process for notifying that the state is present.

When the internal temperature decreases, the amount of refrigerant evaporated in the evaporator decreases, so the pressure in the refrigeration circuit decreases, and the load on the compressor that compresses the refrigerant decreases. When the load applied to the compressor is reduced, whether the rotation speed per unit time (hereinafter simply referred to as the rotation speed) is a constant speed compressor with a constant rotation speed or a compressor with a variable rotation speed (for example, an inverter compressor). Regardless, the value of the current flowing through the compressor is small. For this reason, when the internal temperature decreases, power is saved. Further, in general, a compressor having a variable rotation speed is controlled to decrease the rotation speed as the internal temperature decreases, so that power consumption is further reduced compared to a constant speed compressor.
According to the above cooling storage, it is informed that it is in a power saving state when the internal temperature drops to a predetermined temperature between the upper limit temperature and the lower limit temperature, so whether or not the rotation speed of the compressor is variable Regardless, it can be notified that the power saving state is set. For this reason, it is possible to make the user aware of power saving regardless of whether the rotation speed of the compressor is variable.
In the above cooling storage, the power saving state does not mean that it is in a power saving state compared to some standard. This is because, in order to make the user aware of power saving, it is not always necessary whether the cooling storage is actually in a power saving state compared to some standard.

  The cooling storage includes a receiving unit that receives setting of a target temperature, the upper limit temperature is a temperature obtained by adding a first predetermined temperature to the target temperature, and the lower limit temperature is a second predetermined temperature from the target temperature. The predetermined temperature may be the target temperature.

  Generally, the current value of the current supplied to a constant speed compressor or a compressor with a variable number of revolutions is reduced to such an extent that it can be said to be in a power saving state when the internal temperature drops to a target temperature. According to the above cooling storage, when the internal temperature becomes lower than the target temperature, it is informed that it is in the power saving state. It is possible to make the timing coincident with the accuracy.

  The control unit may cause the notification unit to end notification that the internal temperature is higher than the upper limit temperature by a third predetermined temperature or more for a predetermined period of time.

As described above, the control unit informs that it is in the power saving state when the internal temperature drops to a predetermined temperature. In that case, the timing at which the notification of the power saving state is terminated may be the timing at which the internal temperature becomes higher than a predetermined temperature. However, since the internal temperature frequently rises and falls in the cooling operation, when the notification is terminated at a timing higher than the predetermined temperature, the notification that the power saving state is present and the termination of the notification are frequently repeated. There is a possibility that the user may misunderstand that the cooling storage is out of order.
Moreover, the inside temperature may become higher than a predetermined temperature by opening and closing the door. In that case, when the notification is terminated when the internal temperature becomes higher than the predetermined temperature, the internal temperature is slightly higher than the predetermined temperature due to the short time that the door is opened. Since the notification ends, the notification and the end of the notification are frequently repeated.
According to the above cooling storage, when the internal temperature is higher than the upper limit temperature by the third predetermined temperature or more for a predetermined period of time (in other words, the internal temperature increases due to the opening / closing door being left open for a long time). Since the notification of the power saving state is ended when the power saving state is increased), it is possible to suppress frequent repetition of the notification of the power saving state and the end of the notification. Thereby, it can prevent a user from misunderstanding that it is a failure of a cooling storage.

  When the abnormality is detected by the abnormality detection process when the control unit performs an abnormality detection process for detecting an abnormality of the cooling storage and is informing that the notification unit is in a power saving state, The notification unit may terminate the notification of the power saving state and notify that an abnormality has been detected.

When notifying that the power saving state and the abnormality are detected by the notification unit, if both the power saving state and the abnormality are detected are notified at the same time, it is used for detecting the abnormality. There is a risk that it will be difficult for a person to notice.
According to the above cooling storage, when notifying that the abnormality has been detected, the notification of the power saving state is terminated, and it is emphasized that the abnormality has been detected. For this reason, it becomes easy for the user of a cold storage to notice that abnormality was detected. Thus, the user can be surely prompted to eliminate the abnormality.

  The refrigeration circuit includes a condenser, a condenser fan, and a filter disposed on the front side of the condenser, and the cooling storage includes a detection unit that detects clogging of the filter, and the control unit includes: When clogging is detected by the clogging detection processing when the clogging detection processing for detecting clogging of the filter is performed by the detection unit and the notification unit is informed that the power is in a power saving state May terminate the notification that the notification unit is in the power saving state and notify that the filter is clogged.

When notifying that the power saving state and the filter are clogged by the notification unit, if both the power saving state and the filter are clogged are notified at the same time, the filter is clogged. Doing so may make it difficult for the user to notice.
According to the above cooling storage, it is emphasized that the filter is clogged because the notification that the filter is clogged ends the notification that the filter is in the power saving state. This makes it easier for the user of the cooling storage to notice that the filter is clogged. Accordingly, the user can be surely prompted to eliminate clogging.

  The said control part may complete | finish the alerting | reporting that it is a power saving state to the said alerting | reporting part if predetermined | prescribed defrost start conditions are satisfied, and may perform the defrosting operation which defrosts the said evaporator.

  Since the internal temperature rises when the defrosting operation is performed, it takes time for the internal temperature to decrease when the cooling operation is resumed thereafter. For this reason, when the defrosting operation is performed, the power saving state is lost. According to said cooling storage, since notification that it is a power saving state will be complete | finished if defrost start conditions are satisfied, the notification that it is a power saving state can be complete | finished at the timing which is not in a power saving state.

Front view of the refrigerator according to the first embodiment Sectional view of the AA line shown in FIG. Cross-sectional view of the cooling unit and its surroundings Block diagram showing the electrical configuration of the refrigerator Enlarged view of the operation unit Timing chart for explaining on / off of eco display

<Embodiment 1>
The first embodiment will be described with reference to FIGS. In the following description, the vertical direction and the horizontal direction are based on the vertical direction and the horizontal direction shown in FIG. 1, and the front-rear direction is based on the front-back direction shown in FIG.

With reference to FIG.1 and FIG.2, the whole structure of the refrigerator 1 (an example of a cooling storage) which concerns on this embodiment is demonstrated. The refrigerator 1 is a two-door refrigerator mainly used for business.
As shown in FIG. 2, the refrigerator 1 includes a storage body 11 made of a heat insulating box having openings 11A and 11B on the front side. The openings 11 </ b> A and 11 </ b> B are partitioned vertically by a prismatic front frame 11 </ b> C extending in the left-right direction at the approximate center in the vertical direction. As shown in FIGS. 1 and 2, two heat insulating doors 12 (12 </ b> A, 12 </ b> B) that open and close the openings 11 </ b> A and 11 </ b> B are attached to the storage body 11. The heat insulating door 12 is an example of an open / close door. Four legs 13 that support the storage body 11 are attached to the lower surface of the storage body 11.

  As shown in FIG. 2, a machine room 16 whose upper side is opened is provided on the storage body 11. The machine room 16 houses a cooling unit 17, a control unit 18 (see FIG. 4), a power supply unit (not shown), and the like. As shown in FIGS. 1 and 2, an operation unit 19 (an example of a notification unit and a reception unit) is provided on the front surface of the machine room 16. The user of the refrigerator 1 can perform various operations such as setting the target temperature in the storage by operating the operation unit 19. The target temperature is an example of a predetermined temperature. In the following description, the set target temperature is referred to as a set temperature.

(2) Configuration of the cooling unit and its surroundings The configuration of the cooling unit 17 and its surroundings will be described with reference to FIG. The cooling unit 17 is a unit in which a refrigeration circuit 21 is attached to a heat insulating unit base 20. The unit table 20 is formed to be slightly larger than the opening 11E formed in the ceiling wall 11D of the storage body 11, and is disposed on the ceiling wall 11D so as to close the opening 11E.

The refrigeration circuit 21 includes a compressor 22, a condenser 23, a condenser fan 24, an evaporator 25, an expansion valve (not shown), and the like. The compressor 22 may be an inverter compressor having a variable rotational speed, or may be a constant speed compressor having a constant rotational speed.
A filter (not shown) is provided on the front side of the condenser 23 to prevent dust in the air from adhering to the condenser 23 and reducing the condensation capacity. Note that the position of the filter with respect to the condenser 23 is not limited to the front side. The position of the filter can be appropriately determined as long as it is a position where dust can be prevented from adhering to the condenser 23.

A clogging thermistor 31 (see FIG. 4) for detecting clogging of the filter is disposed in the refrigerant pipe of the condenser 23. The clogged thermistor 31 is an example of a detection unit.
The evaporator 25 is attached to the lower side of the unit table 20, and is accommodated in an air circulation path 28 constituted by a ceiling (the ceiling wall 11D and the unit table 20) and a duct portion 27 described below.

  The duct portion 27 forms an air circulation path 28 with the ceiling, and also functions as a drain pan that receives defrost water that is water in which frost attached to the evaporator 25 has melted. The duct portion 27 includes a substantially flat bottom wall 27A inclined downward toward the rear side, a side wall 27B rising upward from left and right edges of the bottom wall 27A, and a rear edge of the bottom wall 27A. It has a rear wall 27C that rises slightly upward.

  A circular suction port 27D for sucking air into the air circulation path 28 is formed in the front portion of the bottom wall 27A. The rear wall 27C is spaced forward from the rear wall 11F of the storage body 11, and an outlet 27E is formed between the rear wall 27C and the rear wall 11F of the storage body 11. The rear wall 27C is integrally formed with a drain groove 27F having a U-shaped cross section extending from the substantially horizontal center to the rear side. A drainage passage 11G is formed inside the rear wall 11F of the storage body 11, and the drainage groove 27F has a rear end inserted into the drainage passage 11G. The defrost water received by the duct part 27 is discharged | emitted out of the store | warehouse | chamber via the drainage channel 11G from the drainage groove 27F.

The internal fan 29 is attached to the suction port 27D of the duct portion 27 from above. When the internal fan 29 rotates, the internal air is drawn into the air circulation path 28 from the suction port 27D, cooled by the evaporator 25, and blown out from the blowout port 27E.
The internal thermistor 30 (an example of a temperature sensor) is disposed between the internal fan 29 and the evaporator 25 in the air circulation path 28. The internal thermistor 30 detects the internal temperature and outputs it to the control unit 18.

(3) Electrical configuration of refrigerator The electrical configuration of the refrigerator 1 will be described with reference to FIG. The refrigerator 1 includes a control unit 18. The control unit 18 is connected to an operation unit 19, a compressor 22, an internal fan 29, a condenser fan 24, an internal thermistor 30, a clogged thermistor 31, and the like.

  The control unit 18 includes a CPU 18A, a ROM 18B, a RAM 18C, and the like. The control unit 18 controls each unit of the refrigerator 1 by executing a control program stored in the ROM 18B. The control unit 18 may include an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or the like instead of the CPU 18A or in addition to the CPU 18A.

The operation unit 19 will be described with reference to FIG. The operation unit 19 includes a display device 40, a plurality of operation buttons 41 (an example of a reception unit), an inspection display unit 42 (an example of a notification unit), a filter display unit 43 (an example of a notification unit), and a defrosting display unit 44 ( An example of a notification unit) and an eco display unit 45 (an example of a notification unit) are provided.
The display device 40 displays the current internal temperature, target temperature (hereinafter referred to as “set temperature”), and the like. The operation button 41 is a button for the user to perform various settings such as a set temperature. The inspection display unit 42, the filter display unit 43, the defrosting display unit 44, and the eco display unit 45 will be described later.

(4) Cooling operation With reference to FIG. 6, the cooling operation performed by the control part 18 is demonstrated. In the cooling operation, the internal temperature is maintained within a predetermined cooling temperature range by switching the operation / stop of the compressor 22 and the condenser fan 24. The upper limit temperature of the cooling temperature range is, for example, the set temperature + 1.7K [Kelvin], and the lower limit temperature is the set temperature -2.7K. 1.7K is an example of the first predetermined temperature, and 2.7K is an example of the second predetermined temperature.

  In the cooling operation, the control unit 18 operates the compressor 22, the condenser fan 24, and the internal fan 29, and stops the compressor 22 and the condenser fan 24 when the internal temperature decreases to the lower limit temperature. When these are stopped, the internal temperature gradually rises. The controller 18 restarts the operation of the compressor 22 and the condenser fan 24 when the internal temperature rises to the upper limit temperature of the cooling temperature range. By repeating this, the internal temperature is maintained within the cooling temperature range.

(5) Defrosting operation With reference to FIG. 6, the defrosting operation performed by the control part 18 is demonstrated. When the cooling operation described above is performed, frost adheres to the evaporator 25. For this reason, the control part 18 performs a defrost operation, when predetermined | prescribed defrost start conditions are satisfied. The defrosting start condition is “a certain time has elapsed since the end of the previous defrosting operation”, “a preset time has been reached”, or the like. The defrosting start conditions can be determined as appropriate.

  As a defrosting method of the evaporator 25, the heater 22 is heated and the evaporator 25 is heated by the heater, or the compressor 22 is stopped. There is known an off-cycle defrosting system that defrosts by using a defrosting method. The defrosting operation can be performed by any method, but here, an off-cycle defrost method will be described as an example.

  In the off-cycle defrost system, the control unit 18 stops the compressor 22 and the condenser fan 24 and operates only the internal fan 29. The internal temperature gradually rises due to heat penetration from the outside of the refrigerator 1 and the heat generated by the internal fan 29, and the frost attached to the evaporator 25 is dissolved by heat exchange with the wind of the internal fan 29. And the control part 18 will complete | finish defrost, if the internal temperature rises to the preset defrost completion temperature. In addition, the conditions which complete | finish a defrost operation can be determined suitably.

(6) Inspection display unit, filter display unit, defrosting display unit and eco display unit With reference to FIG. 5, the inspection display unit 42, filter display unit 43, defrosting display unit 44 and eco display unit 45 will be described. To do.
The inspection display unit 42 includes a transparent or translucent graphic indicating that an abnormality of the refrigerator 1 has been detected, a character string “inspection”, and a light source such as an LED arranged behind the graphic and the character string. I have. The abnormality of the refrigerator 1 is the case where the difference between the set temperature and the internal temperature is a certain value or more, or the case where an abnormal temperature is detected due to disconnection or short circuit of the internal thermistor 30. The abnormality of the refrigerator 1 is not restricted to these. The control part 18 performs the abnormality detection process which detects abnormality of the refrigerator 1, and will light the inspection display part 42, if abnormality is detected (an example of alerting | reporting). The control unit 18 turns off the inspection display unit 42 when the refrigerator 1 is inspected and no abnormality is detected.

  The filter display unit 43 is a transparent or translucent graphic indicating that clogging of the filter provided on the front side of the condenser 23 has been detected, and a character string “filter”, and behind the graphic and character string. And a light source such as an LED. When the temperature detected by the clogging thermistor 31 is kept at a predetermined temperature or higher for a predetermined time or longer, the control unit 18 considers that the filter is clogged (an example of clogging detection processing). When it is determined that the filter is clogged, the control unit 18 turns on the filter display unit 43 (an example of notification). Then, when the control unit 18 assumes that the clogging has been resolved, the control unit 18 turns off the filter display unit 43.

  The defrosting display unit 44 is a transparent or translucent figure indicating that the defrosting operation is being performed, a character string “defrosting”, and a light source such as an LED disposed behind the figure and the character string. And. When the predetermined defrosting start condition described above is satisfied, the control unit 18 turns on the defrosting display unit 44 (an example of notification), and turns off the defrosting display unit 44 when the defrosting operation ends.

  The eco display unit 45 includes a transparent or translucent graphic indicating that the refrigerator 1 is in a power saving state and a character string “ECO”, and a light source such as an LED disposed behind the graphic and the character string. I have. The eco display unit 45 will be specifically described below.

  When the internal temperature decreases, the amount of refrigerant evaporated in the evaporator 25 decreases, so the pressure in the refrigeration circuit 21 decreases, and the load on the compressor 22 that compresses the refrigerant decreases. When the load applied to the compressor 22 is reduced, the value of the current flowing through the compressor 22 is reduced regardless of whether the compressor 22 is a constant speed compressor or an inverter compressor. For this reason, when the internal temperature decreases, power is saved. In general, since the inverter compressor is controlled to reduce the rotational speed as the internal temperature decreases, the inverter compressor can further save power than the constant speed compressor.

For this reason, the control unit 18 turns on the eco display unit 45 when the internal temperature decreases to the set temperature. Thereby, it is alert | reported that the refrigerator 1 is a power saving state. Here, in the present embodiment, the power saving state does not mean that it is in a power saving state as compared to some standard. This is because it is not always necessary to make the user aware of power saving whether or not the refrigerator 1 is actually in a power saving state compared to some standard.
As will be described in detail later, after the eco display unit 45 is turned on, the control unit 18 extinguishes the eco display unit 45 when the internal temperature is higher than the upper limit temperature by a third predetermined temperature or more for a predetermined time.

(7) Lighting / extinguishing of each display part With reference to FIG. 6, lighting / extinguishing of each display part is demonstrated more concretely. In FIG. 6, time T1 is the time when the refrigerator 1 is turned on. In the example shown in FIG. 6, the internal temperature has decreased to the set temperature at time T2. For this reason, the control unit 18 turns on the eco display unit 45 at time T2 (an example of notification processing).

  Time point T3 is a time point when the abnormality of the refrigerator 1 is detected, and time point T4 is a time point when the abnormality is not detected. As described above, when the control unit 18 detects an abnormality in the refrigerator 1, the control display unit 42 is turned on. The control unit 18 turns off the eco display unit 45 while the inspection display unit 42 is turned on. For this reason, it is visually emphasized that an abnormality has been detected as compared with the case where both the eco display unit 45 and the inspection display unit 42 are turned on simultaneously. Then, when no abnormality is detected, the control unit 18 turns off the inspection display unit 42 and restarts the lighting of the eco display unit 45.

  Time point T5 is a time point when the filter is considered clogged, and time point T6 is a time point when the filter is considered to have been clogged. As described above, the control unit 18 turns on the filter display unit 43 when it is determined that the filter is clogged. The control unit 18 turns off the eco display unit 45 while the filter display unit 43 is turned on. For this reason, it is visually emphasized that the filter is clogged as compared with the case where both the eco display unit 45 and the filter display unit 43 are turned on simultaneously. When the clogging is eliminated, the control unit 18 turns off the filter display unit 43 and restarts the lighting of the eco display unit 45.

  In the example shown in FIG. 6, the heat insulating door 12 is opened at time T7. When the heat insulation door 12 is opened, the inside temperature rises. Time point T8 is a time point when the inside temperature rises to 1.0K higher than the upper limit temperature (in other words, 2.7K higher than the set temperature) by opening the heat insulating door 12. Time T9 is the time when 1 minute has elapsed from time T8. In the example shown in FIG. 6, since the heat insulating door 12 is left open for a long time, the state where the internal temperature is higher than the upper limit temperature by 1.0 K or more continues until time T9. The control unit 18 turns off the eco display unit 45 when the internal temperature is higher than the upper limit temperature by 1.0 K or more for 1 minute. 1.0K is an example of a third predetermined temperature, and 1 minute is an example of a predetermined time. Hereinafter, the reason why the eco display unit 45 is turned off when the internal temperature is higher than the upper limit temperature by 1.0 K or more for one minute will be described.

  As described above, the control unit 18 turns on the eco display unit 45 when the internal temperature decreases to the set temperature. In this case, the timing at which the eco display unit 45 is turned off can be the timing at which the internal temperature becomes higher than the set temperature. However, since the internal temperature frequently fluctuates in the cooling operation, if the light is turned off at the timing when the internal temperature is higher than the set temperature, the lighting and the light-off are frequently repeated. There is a risk of misunderstanding.

  Moreover, the inside temperature may become higher than the set temperature by opening and closing the heat insulating door 12. In that case, when the eco display unit 45 is turned off when the internal temperature becomes higher than the set temperature, the internal temperature is slightly higher than the set temperature due to a short time during which the heat insulating door 12 is opened. Even if it exists, it is turned off, so lighting and turning off are repeated frequently.

  On the other hand, if the eco display unit 45 is turned off when the heat insulating door 12 is left open for a long time, it is possible to prevent the eco display unit 45 from being frequently turned on and off.

  Another reason is that the user is conscious not to leave the insulated door 12 open for a long time to save power. When the user keeps the heat insulating door 12 open for a long time, the state in which the internal temperature is higher than the upper limit temperature by 1.0 K or more continues for 1 minute or more, so the eco display unit 45 is turned off. For this reason, the user understands that the refrigerator 1 is no longer in the power saving state because he / she left the heat insulating door 12 open for a long time. For this reason, the user is conscious of closing the heat insulating door 12 before the eco display unit 45 is turned off.

  In the example shown in FIG. 6, the internal temperature has decreased to the set temperature at time T10. Therefore, the control unit 18 lights the eco display unit 45 at time T10.

  Time T11 is a time when the defrosting start condition is established, and time T12 is a time when the defrosting operation is finished. When the predetermined defrosting start condition described above is satisfied, the control unit 18 turns off the eco display unit 45 and turns on the defrosting display unit 44. When the defrosting operation is performed, the internal temperature rises. Therefore, even after the defrosting operation is completed at time T12, the control unit 18 does not immediately turn on the eco display unit 45, and then the internal temperature is lower than the set temperature. When it becomes, the eco display unit 45 is turned on.

(8) Effects of the embodiment According to the refrigerator 1, the eco-display unit 45 is turned on when the internal temperature drops to the set temperature, so whether or not the compressor 22 is a constant speed compressor or an inverter compressor. Regardless, the eco display unit 45 can be turned on. For this reason, regardless of whether it is a constant speed compressor or an inverter compressor, the user can be aware of power saving.
Moreover, according to the refrigerator 1, there is also an advantage that the number of parts can be reduced. Specifically, in the technique described in Patent Document 1 described above, it is necessary to provide a sensor for detecting the temperature outside the storage room in order to light the eco mark. On the other hand, since the eco-display unit 45 can be turned on even if the refrigerator 1 does not include a sensor for detecting the temperature outside the storage room, the number of parts of the refrigerator 1 can be reduced.

  Furthermore, according to the refrigerator 1, the upper limit temperature of the cooling temperature range is a temperature obtained by adding 1.7K to the set temperature, the lower limit temperature is a temperature obtained by subtracting 2.7K from the set temperature, and the predetermined temperature is the set temperature. is there. In general, when the internal temperature of the constant speed compressor or the inverter compressor decreases to a set temperature, the current value decreases to such an extent that it can be said to be in a power saving state. According to the refrigerator 1, since the eco display unit 45 is turned on when the internal temperature becomes equal to or lower than the set temperature, the timing at which the eco display unit 45 is turned on is more accurate than the timing at which the refrigerator 1 enters the power saving state. Can be matched.

  Furthermore, according to the refrigerator 1, when the state in which the internal temperature is higher than the upper limit temperature by 1.0 K or more continues for 1 minute (in other words, the internal temperature greatly increases because the heat insulating door 12 is left open for a long time). When the eco display unit 45 is turned off, it is possible to prevent the lighting and turning off of the eco display unit 45 from being frequently repeated. Thereby, it can prevent a user from misunderstanding that the refrigerator 1 is out of order. Further, when the state where the internal temperature is higher than the upper limit temperature by 1.0 K or more continues for 1 minute, the user can be made aware of power saving by turning off the eco display unit 45.

  Furthermore, according to the refrigerator 1, since it is visually emphasized that the abnormality is detected by turning off the eco display unit 45 while the inspection display unit 42 is turned on, the user can recognize that the abnormality of the refrigerator 1 has occurred. It becomes easy to notice that it was detected. Thus, the user can be surely prompted to eliminate the abnormality.

  Furthermore, according to the refrigerator 1, while the filter display unit 43 is turned on, the eco display unit 45 is turned off to visually emphasize that the filter is clogged. It becomes easy to notice that it is clogged. Accordingly, the user can be surely prompted to eliminate clogging.

  Furthermore, according to the refrigerator 1, the eco display unit 45 is turned off during the defrosting operation. Since the internal temperature rises when the defrosting operation is performed, it takes time for the internal temperature to decrease when the cooling operation is resumed thereafter. For this reason, when the defrosting operation is performed, the power saving state is lost. According to the refrigerator 1, since the eco display unit 45 is turned off when the defrosting start condition is satisfied, the eco display unit 45 can be turned off at a timing when the power saving state is not achieved.

<Other embodiments>
The technology disclosed in the present specification 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 disclosed by the present specification.

  (1) In the above embodiment, the case where the eco display unit 45 is turned off when the state where the internal temperature is higher than the upper limit temperature by 1.0 K or more continues for 1 minute has been described as an example. On the other hand, when the inside temperature becomes higher than the set temperature, the eco display unit 45 may be turned off.

  (2) In the above embodiment, the refrigerator 1 has been described as an example of the cooling storage, but the cooling storage may be a freezer. Further, the cooling storage may include a plurality of storages. For example, the cooling storage may include a freezer and a refrigerator. In the case where a plurality of storages are provided, the eco display unit 45 may be turned on when the internal temperature becomes equal to or lower than the set temperature in at least one storage. By doing so, it is possible to positively raise awareness of power saving to the user.

  (3) Although the set temperature has been described as an example of the predetermined temperature in the above embodiment, the predetermined temperature can be appropriately determined as long as the temperature is between the upper limit temperature and the lower limit temperature. In other words, it is possible to appropriately determine how many times are defined as the power saving state between the upper limit temperature and the lower limit temperature.

  (4) In the above embodiment, the case where the inspection display unit 42, the filter display unit 43, the defrosting display unit 44, and the eco display unit 45 are turned on as an example of the notification has been described as an example. I can't. For example, the operation unit 19 may be provided with a liquid crystal display, and a character string such as “check”, “filter”, “defrosting”, or “ECO” may be displayed on the liquid crystal display for notification.

DESCRIPTION OF SYMBOLS 1 ... Refrigerator (an example of a cooling storage), 11 ... Storage body, 12 ... Thermal insulation door (an example of an opening / closing door), 18 ... Control part, 19 ... Operation part (An example of an alerting | reporting part, an acceptance part), 21 ... Refrigeration circuit, DESCRIPTION OF SYMBOLS 22 ... Compressor, 23 ... Condenser, 24 ... Condenser fan, 25 ... Evaporator, 30 ... Inside thermistor (example of temperature sensor), 31 ... Clogged thermistor (example of detection part), 42 ... Inspection display part (An example of a notification unit), 43 ... a filter display unit (an example of a notification unit), 44 ... a display unit during defrosting (an example of a notification unit), 45 ... an eco display unit (an example of a notification unit)

Claims (6)

A cold storage,
A storage body having an opening and closing door;
A refrigeration circuit having a compressor and an evaporator;
A temperature sensor for detecting the internal temperature;
A control unit;
A notification unit;
With
The controller is
A cooling operation in which the compressor is operated to cool the interior, and when the interior temperature detected by the temperature sensor falls to a predetermined lower limit temperature, the compressor is stopped, and then the interior temperature is predetermined. Cooling operation to resume the operation of the compressor when it rises to the upper limit temperature of
An informing process for informing the informing unit that it is in a power saving state when the internal temperature decreases to a predetermined temperature between the upper limit temperature and the lower limit temperature;
Perform the cooling storage. The cooling storage according to claim 1,
It has a reception unit that accepts the target temperature setting,
The upper limit temperature is a temperature obtained by adding a first predetermined temperature to the target temperature, the lower limit temperature is a temperature obtained by subtracting a second predetermined temperature from the target temperature, and the predetermined temperature is the target temperature. , Cooling storage. The cooling storage according to claim 1 or 2,
The said control part is a cooling storage store | warehouse | chamber which makes the alerting | reporting part complete | finish the alerting | reporting that it is a power saving state, if the state in which the internal temperature is 3rd predetermined temperature or more higher than the said upper limit temperature continues for the predetermined time. The cooling storage according to any one of claims 1 to 3,
When the abnormality is detected by the abnormality detection process when the control unit performs an abnormality detection process for detecting an abnormality of the cooling storage and is informing that the notification unit is in a power saving state, A cooling storehouse that causes the notification unit to end notification that it is in a power saving state and notify that an abnormality has been detected. The cooling storage according to any one of claims 1 to 4,
The refrigeration circuit has a condenser, a condenser fan, and a filter disposed on the front side of the condenser,
The cooling storage is provided with a detection unit that detects clogging of the filter,
The control unit performs clogging detection processing for detecting clogging of the filter by the detection unit, and clogging is performed by the clogging detection processing when notifying that the notification unit is in a power saving state. Is detected, the notification unit terminates the notification of the power saving state and notifies the filter that the filter is clogged. The cooling storage according to any one of claims 1 to 5,
The said control part is a cooling storehouse which complete | finishes the alerting | reporting that it is a power saving state to the said alerting | reporting part if predetermined | prescribed defrost start conditions are satisfied, and performs the defrosting operation which defrosts the said evaporator.

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