JP2015098971A - Cooling storage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooling storage capable of performing an operation according to power supply.SOLUTION: A cooling storage 10 in which power is supplied from outside includes a cold storage agent cooling switch 45 and a control unit 39A for switching between: a cooling operation mode for performing a cooling operation in which stored objects stored in a storage chamber 33 are cooled by sending out the cool air in a cold storage agent chamber 24 while bringing a cold storage agent 30 stored in the cold storage agent chamber 24 into a cooled state by a cooling device; and a cold storage agent operation mode for performing a cold storage agent operation in which the cooling device is brought into a stop state, and the stored objects are cooled by sending out the cold air in the cold storage agent chamber 24 to the storage chamber 33.

Description

  The present invention relates to a cooling storage.

  There is known a cooling storage room including a cold storage agent chamber in which a cold storage agent is stored and a storage chamber in which stored items to be cooled are stored. In this type, the operation and stop of the refrigeration unit are repeatedly performed at short intervals, and the cold air of the refrigeration unit is sent to the cool storage agent chamber and the storage chamber.

  The cold storage type cold storage of Patent Document 1 detects the temperature of the cold storage agent by the temperature detection unit, and when the temperature of the cold storage agent is equal to or higher than the set temperature, the compressor of the refrigeration unit is operated to cool the cold storage agent, When the temperature of the cool storage agent is equal to or lower than the set temperature, the compressor is stopped and the cold insulation chamber is cooled by the cool air generated by the cool storage agent.

JP-A-1-318873

  By the way, in the structure of patent document 1, although the operation | movement and a stop of a compressor are repeated according to the temperature of a cool storage agent, for example, at the peak of electric power demand, a refrigeration unit is stopped and cooling of stored goods with the cool air of a cool storage agent is carried out. Or when the power outage occurs at a fixed time, the refrigeration unit is stopped according to the power outage time and the stored item is cooled with the cool air of the cold storage agent, so that it can not be operated according to the external power supply There was a problem.

  This invention is completed based on the above situations, Comprising: It aims at providing the cooling storage which can perform the operation | movement according to the electric power supply from the outside.

  The present invention is a cooling storage that receives power supply from outside, a cooling device that generates cool air, a cool storage agent chamber in which a cool storage agent is stored and cool air from the cooling device is introduced, and the cool storage agent chamber, Are provided at different positions and store storage items to be cooled, delivery means for sending cold air from the cool storage agent chamber to the storage chamber, and cool storage agent stored in the cool storage agent chamber A cooling operation mode in which a cooling operation is performed to cool the stored material stored in the storage chamber by sending out cool air from the cold storage agent chamber while being cooled by the device; Switching means for switching between a cool storage agent operation mode for performing a cool storage agent operation for sending the cool air to the storage chamber and cooling the stored item.

  According to this configuration, since the switching means for switching between the cooling operation mode and the cool storage agent operation mode is provided, the power consumption at the peak of power demand can be reduced as the cool storage agent operation mode at the peak power demand.

As an embodiment of the above configuration, the following embodiment is preferable.
-Switching between the cooling operation mode and the regenerator operation mode by the switching means is performed by a user operation on the operation unit.
If it does in this way, even if it is the timing which cannot be detected by the cooling storage side, a cooling operation mode and a cool storage agent operation mode can be switched by a user's operation.

-It has the cooling related apparatus which operate | moves in relation to the said cooling device, and is provided with the control means which controls so that the said cooling related apparatus operate | moves in the said cool storage agent operation mode.
If it does in this way, also in the cool storage agent driving | operation mode, a cooling related apparatus can be operated and the user can perform the handling similar to the time of normal cooling driving | operation.
Specifically, by operating the display unit as a cooling-related device, it is possible to display the temperature of the storage room, display the operating state, etc., and turn on the interior light to turn on the interior light It is possible to prevent the workability from being deteriorated due to the failure, or to allow the drain evaporator to function to prevent the overflow of the drain.

-It has a reporting means for reporting the end of cooling by the cold storage agent.
-It has a detection means for detecting the end of cooling by the cool storage agent, and the switching means switches the cool storage agent operation mode to the cooling operation mode according to the detection result from the detection means.

In the cooling operation in the cooling operation mode, a cold storage agent freezing operation for freezing the cold storage agent and a cold storage agent cold storage operation in which the cold storage agent is kept at a temperature that does not thaw, and in the cold storage agent cold storage operation, the cold storage operation is performed. The set temperature of the agent chamber is set to a temperature that is higher than the set temperature during the cold storage agent freezing operation and lower than the thawing temperature of the cold storage agent.
A cool storage agent chamber cooling fan for sending cool air from the cooling device to the cool storage agent chamber, and an ambient temperature detection means for detecting the ambient temperature, and the cool storage agent according to the ambient temperature detected by the ambient temperature detection means A rotation speed control means for controlling the rotation speed of the room cooling fan is provided.

A defrost heater and a defrost temperature detecting means for detecting the temperature of the defrost heater, and in the cooling operation in the cooling operation mode, the regenerator freezing operation for freezing the regenerator and the defrosting of the regenerator. A cold storage agent cooling operation is performed in which the cold storage agent is cooled at a temperature that is not allowed to be performed.
A defrosting heater and an operation unit that starts defrosting by a user operation are provided, and in the cooling operation in the cooling operation mode, the cold storage agent freezing operation for freezing the cold storage agent and the cold storage agent are kept at a temperature that does not defrost. In the cold storage agent freezing operation, the operation of starting the defrosting of the operation unit is invalidated, and in the cold storage agent cold storage operation, the operation of starting the defrosting of the operation unit is performed. Is valid.

A defrost heater, a timer for measuring the time until the defrost heater is driven, a storage room temperature detecting means for detecting the temperature of the storage room, and a heater control means for controlling the drive of the defrost heater. The heater control means turns the defrost heater on when the time measured by the timer is equal to or longer than a predetermined time and the temperature detected by the storage chamber temperature detection means is equal to or lower than a predetermined set temperature. Control to drive.
In this way, if the measured time of the timer has passed a predetermined time, the cold storage agent, that is, the cold storage agent chamber is sufficiently cooled, so that the cold air that has been cooled during the defrosting operation falls into the storage chamber by natural convection. Moreover, since the temperature of the storage room at the time of the start of defrosting is originally kept low, the temperature rise of the storage room during the defrosting operation is suppressed, and as a result, deterioration of stored items can be suppressed.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to perform the operation | movement according to electric power supply about a cooling storage.

The front view which shows the cooling storage of Embodiment 1. AA sectional view of FIG. BB sectional view of FIG. Front view showing the operation unit Ladder circuit diagram showing the electrical configuration of the cooling storage The figure which shows the electrical connection of the input side and output side of a control part Flow chart showing processing of control unit Timing chart showing operation of components of cooling storage The flowchart which shows the process of the control part of Embodiment 2. Timing chart showing operation of components of cooling storage The flowchart which shows the process of the control part of Embodiment 3. Timing chart showing operation of components of cooling storage The flowchart which shows the process of the control part of Embodiment 4. Timing chart showing operation of components of cooling storage 7 is a flowchart illustrating processing of a control unit according to the fifth embodiment. Timing chart showing operation of components of cooling storage Timing chart showing operation of components of cooling storage of embodiment 6 A flowchart which shows processing of a control part of Embodiment 7. Timing chart showing operation of components of cooling storage

<Embodiment 1>
Hereinafter, the first embodiment will be described with reference to FIGS. 1 to 8. In the following description, the left side of FIG.
The cooling storage 10 has a vertically long box shape, and as shown in FIG. 2, a machine room 11 including a cooling device, a cool storage agent chamber 24 in which a cool storage agent 30 is stored, and a stored item to be cooled are stored. Storage chamber 33.

  The machine room 11 is provided in the upper part of the cooling storage 10 and includes a refrigeration unit 12, a cooler 16, a control box 38, and an electrical box 46. The refrigeration unit 12 includes a compressor 13, a condenser 14, and a condenser fan 15. The compressor 13, the condenser 14, and the cooler 16 are circulated and connected by a refrigerant pipe to constitute a known refrigeration cycle. The compressor 13, the condenser 14, the condenser fan 15, and the cooler 16 are cooling devices that generate cool air. A cooling duct 17 is provided in the lower part of the machine room 11.

  The cooling duct 17 includes a duct panel 18, a cooler 16, and a regenerator chamber cooling fan 21. The duct panel 18 is made of a molded product such as ABS resin, partitions the cool storage agent chamber 24 and the machine chamber 11, extends and is fixed in a direction inclined with respect to the horizontal direction, and is installed in the cool storage agent chamber 24. A suction port 19 through which the air passes, and a discharge port 20 through which cool air is discharged to the cold storage agent chamber 24. The cool storage agent chamber cooling fan 21 is fixed around the suction port 19 in the duct panel 18, and the air sucked from the suction port 19 by the cool storage agent chamber cooling fan 21 is cooled by the cooler 16 and is discharged from the discharge port 20. It is discharged into the cold storage agent chamber 24.

The basic cooling operation is performed by driving the cooling device, and cold air is generated by heat exchange while air passes through the cooler 16, and this cold air is supplied from the cool storage agent chamber cooling fan 21 to the cool storage agent chamber 24. As a result, the regenerator 30 is cooled (frozen), and the cool air in the regenerator chamber 24 is given to the lower storage chamber 33 by the storage chamber cooling fan 28. In this embodiment, in order to freeze the cool storage agent 30, for example, the inside of the cool storage agent chamber 24 is cooled to about −12 ° C.
Thus, in order to lower the temperature in the regenerator chamber 24 to a low temperature range, the cooler 16 needs to be maintained in a corresponding low temperature state, and it can be said that frost formation is likely to occur. Therefore, a defrosting operation is performed as appropriate, and a defrost heater 22 including a sheathed heater is mounted on the lower surface of the cooler 16.

The cool storage agent chamber 24 is provided below the machine room 11 and accommodates the cool storage agent 30 therein. The cool storage agent chamber 24 and the storage chamber 33 are partitioned by a heat insulating wall 25 made of urethane or the like. It has been. The heat insulating wall 25 has a suction port 26 and a blowout port 27, and a storage chamber cooling fan 28 (an example of a “delivery means”) is fixed to the blowout port 27 side.
The cool storage agent 30 is in a low temperature state and generates cool air. The cool storage agent 30 is placed in the cool storage agent shelf network 31 in the cool storage agent chamber 24 and is accommodated in plural at intervals in the vertical and horizontal directions. The regenerator 30 is a well-known one in which a hardener made of a synthetic resin such as polyethylene is filled with a gelling agent, and as a whole has a flat rectangular thick plate shape.

The cool air in the regenerator chamber 24 is discharged into the storage chamber 33 from the outlet 27 through the rear duct 29 in the storage chamber 33 by the rotation of the storage chamber cooling fan 28. From the suction port 26 provided on the opposite side to the cold storage agent chamber 24.
The storage chamber 33 stores stored items (not shown), and is provided below the cool storage agent chamber 24. The storage chamber 33 is formed of a vertically long heat insulating box with a front opening. The door 34 is supported so as to be rotatable about one end side in the width direction.

Inside the storage chamber 33, four shelf pillars 35 are attached at rectangular corner positions. A plurality of shelf nets 37 are supported on the shelf pillars 35 with a certain interval in the vertical direction and supported by a shelf holder, and a storage space for storing stored items is formed above each shelf net 37. A dew condensation prevention heater (not shown) is embedded in the periphery of the front opening. In the storage chamber 33, for example, medicine can be stored, and maintained at, for example, + 5 ° C.
The front panel 11A constituting the front surface of the machine room 11 is rotatable about the upper end, and when the front panel 11A is opened, an operation unit 41 operable by the user appears as shown in FIG. . The operation unit 41 is provided in front of the control box 38 and the electrical equipment box 46. The control box 38 accommodates an operation board and a control circuit 39. The electrical box 46 accommodates a relay mounted on the circuit board, a buzzer 53, and the like.

  The operation unit 41 includes a control panel 40 provided on the front surface of the control box 38, and a power switch 48 (leakage breaker) provided above the control box 38 on the front surface of the electrical box 46 and operable from the front. And an operation switch 49. The control panel 40 includes a setting unit 41A and display units 46A and 46B. The setting unit 41 </ b> A includes a front frame heater button 42, a reset button 43, and a manual defrost button 44.

The front frame heater button 42 switches on and off according to the strength of the front frame heater. The reset button 43 cancels the error display and the buzzer sound. The manual defrost button 44 is used when the user performs defrosting at an arbitrary timing.
A cool storage agent cooling switch 45 is provided on the bottom surface of the control panel 40.
The cool storage agent cooling switch 45 can be switched on and off in a seesaw shape by pressing the side protruding to the bottom surface side of the control panel 40, and is cooled by a cooling device in a cooling operation mode described later in “OFF”. At “ON”, the cool storage agent operation mode is set, the cooling device is stopped, and the cool storage agent 30 starts cooling the stored items.

Information on the state (switching) of the cool storage agent cooling switch 45 is given to the control unit 39A. When the control unit 39A is “ON”, the cool storage agent operation mode is set, and when it is “OFF”, the cooling operation mode is set. The display unit 46A performs a power failure display, a cool storage agent cooling display, a defrost display, and the like, and the display unit 46B performs a storage room temperature display. The display units 46A and 46B are arranged at the position of the opening 11B (see FIG. 1) penetrating the front panel 11A, and can be viewed from the outside even when the front panel 11A is closed.
The operation switch 49 can cut off the power supply from a storage battery (not shown) made of a dry battery or the like provided in the cooling storage 10 when the external power source is interrupted due to a power failure or the like. When the operation switch 49 is turned off, the storage battery The supply of power from is cut off, and the storage room cooling fan 28 and the like are stopped. Further, the operation of the cooling storage 10 is also stopped.

Next, the electrical configuration of the cooling storage 10 will be described.
As shown in FIG. 5, in the cooling storage 10, a control circuit 39, a compressor 13, and a defrost heater 22 are connected in parallel to an external power source E. A storage room cooling fan 28 is connected to the control circuit 39. In addition, contact portions 60B, 61B, and 62B are connected in series to the storage chamber cooling fan 28, the compressor 13, and the defrost heater 22, respectively, for turning off and on. The contact portions 60B, 61B, and 62B are provided in the relays 60, 61, and 62 together with the coils 60A, 61A, and 62A connected to the control circuit 39. A condenser fan 15 is connected to the compressor 13 in parallel. In FIG. 5, the power switch 48, the operation switch 49, and the like are omitted.

  Note that the compressor 13, the defrost heater 22, and the control circuit 39 are supplied with a single-phase AC 100 [V] from the power source E, and the control circuit 39 is further supplied with a current converted into DC by a rectifier circuit (not shown). And supplied to the storage chamber cooling fan 28. The control circuit 39 (control board) includes a circuit board and a plurality of electronic components mounted on the circuit board, and includes a control unit 39A such as a microcomputer that executes a predetermined program.

  As shown in FIG. 6, the control unit 39A includes, on the input side, a setting unit 41A, an operation switch 49, a thermistor 50 (a cold storage chamber chamber thermistor 50A, a storage chamber chamber thermistor 50B, an ambient temperature thermistor 50C, and a defrosting thermistor 50D. ), A door opening / closing sensor 56, a timer 58, and the like. On the output side, the compressor 13, the condenser fan 15, the storage chamber cooling fan 28, the defrost heater 22, the display units 46A and 46B, the interior lamp 51, the drain evaporator 52, the buzzer 53, and the like are connected. For example, the timer 58 is mounted on an operation board or a control board in the control box 38, but is not limited thereto, and the time may be measured by a timer provided in the control unit 39A.

The control unit 39A includes a cooling device control unit 54, a defrost control unit 55, and a storage unit 57. The cooling device control unit 54 controls the operation of the cooling device. In the cooling operation mode, the compressor 13, the condenser fan 15, and the storage chamber cooling fan 28 are controlled by the cooling device control unit 54, and the temperature in the storage chamber 33 is maintained near the set temperature. The defrosting control unit 55 controls on / off of the defrosting heater 22 and turns on the defrosting heater 22 when the defrosting start time is reached. The defrosting control unit 55 turns off the defrosting heater 22 when a defrosting termination condition such as the defrosting of the cooler 16 is completed. In addition, display part 46A, 46B, the interior lamp 51, the drain evaporator 52, etc. are examples of the cooling related apparatus which operate | moves in relation to a cooling device.
39 A of control parts operate | move a cooling device according to the on / off information of the cool storage agent cooling switch 45, the cooling operation mode which performs the cooling operation which cools the cool storage agent 30 and the stored material, the cooling device is stopped, and the cool storage agent 30 The cool storage agent operation mode for cooling the stored item with the cool air is switched.

Next, control of the cooling storage 10 will be described.
As shown in FIGS. 7 and 8, with the power switch 48 and the operation switch 49 turned on (“Y” in S11, “Y” in S12), the regenerator cooling switch 45 is turned “off”. (The cool storage agent cooling switch is off. “N” in S13), the cooling operation mode is set, and the cooling operation is performed (S14).

In the cooling operation mode, the control unit 39A drives the (refrigeration unit 12) compressor 13 and the condenser fan 15, and controls the on / off of the storage room cooling fan 28 to perform the cooling operation. Further, the storage unit temperature is displayed on the display unit 46B.
On the other hand, when the cool storage agent cooling switch 45 is set to “ON” in S13 (the cool storage agent cooling switch is ON. “Y” in S13), the control unit 39A switches from the cooling operation mode to the cool storage agent operation mode (cold storage). The coolant cooling switch 45 and the control unit 39A are examples of “switching means”), and the cold storage agent operation is performed.

  In the cool storage agent operation mode, the control unit 39A does not drive the refrigeration unit 12 (the compressor 13 and the condenser fan 15), and performs the cool storage agent operation that operates with the storage chamber cooling fan 28 turned on. In this cool storage agent operation, not only the storage room temperature display of the display unit 46B but also the cool storage agent operation display indicating that the cool storage agent operation is being performed on the display unit 46A (in the cool storage agent operation mode) ( S16). In this way, the display unit 46A displays the cool storage agent operation display so that it can be visually recognized that the cool storage agent operation is being performed, thereby informing the user that it is in the cool storage agent operation mode (that the cool storage agent operation is being performed). In addition, the storage room temperature can be managed even during the cold storage agent operation by displaying the storage room temperature on the display unit 46B even in the cold storage agent operation mode.

  In both the cooling operation mode and the cool storage agent operation mode (if the power switch 48 and the operation switch 49 are turned on), the control unit 39A opens or closes the door by a detection signal from the door opening / closing sensor 56. When detected, the interior lamp 51 is lit to make the inside of the storage chamber 33 easier to see. Further, in any state of the cooling operation mode and the cool storage agent operation mode, the control unit 39A operates the drain evaporation device 52 to evaporate the waste water accumulated in the drain pan and prevent the waste water in the drain pan from overflowing. To do.

According to the present embodiment, the following operations and effects are achieved.
The cooling storage 10 is a cooling storage 10 that is supplied with electric power from the outside, and includes a cooling device that generates cool air, a cool storage agent chamber 24 in which the cool storage agent 30 is housed and cool air from the cooling device is introduced, and a cool storage agent. A storage chamber 33 that is provided at a position different from the chamber 24 and stores a stored product to be cooled, a storage chamber cooling fan 28 (sending means) that sends the cool air of the cool storage agent chamber 24 to the storage chamber 33, and a cold storage agent A cooling operation mode in which a cooling operation is performed in which the cool storage agent 30 stored in the storage chamber 33 is cooled by the cooling device while the cool storage agent 30 stored in the storage chamber 33 is cooled by the cooling device. Is in a stopped state, cool storage agent cooling switch 45 (switching means) for switching between the cool storage agent operation mode for performing the cool storage agent operation for sending the cool air of the cool storage agent chamber 24 to the storage chamber 33 and cooling the stored items, and the control unit 39A ( Switching hand ) And a.

  According to this embodiment, since the cool storage agent cooling switch 45 (switching means) and the control unit 39A (switching means) for switching between the cooling operation mode and the cool storage agent operation mode are provided, the cool storage agent operation mode is at the peak of power demand. As a result, power consumption at the peak of power demand can be reduced.

Further, since the power supply state from the power supply is maintained even in the cool storage agent operation mode, devices other than the cooling device in the cooling storage 10 (such as various displays and an internal lamp) are operated in the cool storage agent operation mode. Can do.
Further, switching between the cooling operation mode and the cool storage agent operation mode by the control unit 39A (switching means) is performed by an operation of the cool storage agent cooling switch 45 of the operation unit 41 by the user.

  Furthermore, a cooling-related device that operates in association with the cooling device is provided, and a control unit 39A (control means) that controls the cooling-related device to operate in the cold storage agent operation mode is provided. If it does in this way, also in the cool storage agent driving | operation mode, a cooling related apparatus can be operated and the user can perform the handling similar to the time of normal cooling driving | operation.

  Specifically, the control unit 39A operates the display units 46A and 46B as the cooling related devices to display the temperature of the storage chamber 33, display the operation state, and the like. By turning on the interior lamp 51, it is possible to prevent the workability from being lowered due to the interior lamp 51 not being turned on, or to allow the drain evaporator 52 as a cooling-related apparatus to function to prevent the overflow of the drain. Etc. are possible. Thereby, the user can work with the same recognition as in the cooling operation mode even in the cold storage agent operation mode.

<Embodiment 2>
Next, Embodiment 2 will be described with reference to FIGS. Embodiment 2 is provided with the structure which alert | reports that the cool storage agent driving | operation mode (cool storage agent driving | operation) was complete | finished. Other configurations are the same as those of the first embodiment, and the description of the same configurations as those of the first embodiment is omitted.

The timer 58 (cool storage agent cooling operation timer) measures the time of the coolant storage operation.
As shown in FIGS. 9 and 10, when the cool storage agent cooling switch 45 is set to “ON” (the cool storage agent cooling switch is ON. “Y” in S21), the control unit 39A cools the storage. The operation is switched to the agent operation mode and the cool storage agent operation is started, and the measurement of the elapsed time is started by the timer 58 (the cool storage agent cooling operation timer) (S22). When a predetermined time (cold storage agent cooling operation time) is reached after starting the cold storage agent operation ("Y" in S23), the cold storage agent operation is terminated (S24). At this time, the storage chamber cooling fan 28 is driven to be turned on until the cool storage agent cooling switch 45 is turned off. By continuing to drive only the storage chamber cooling fan 28 until the cool storage agent cooling switch 45 is turned off, it is possible to suppress the temperature rise in the storage chamber 33 even if the user forgets to return the cool storage agent cooling switch 45. Become. In addition, the cool storage agent operation display and the storage room temperature display on the display units 46A and 46B are turned off together when the cool storage agent operation ends (S25).

Since the cool storage agent operation display and the storage room temperature display on the display units 46A and 46B are turned off, the user can no longer maintain the storage chamber 33 at a predetermined temperature because the cool storage agent 30 is thawed and cooling by the cool storage agent 30 is finished. I can know that. Thereby, it is possible to prompt the user to cope with the movement of stored items in the storage chamber 33 and to switch to the cooling operation mode. Therefore, the control unit 39A and the display units 46A and 46B serve as notification means for notifying the end of cooling by the regenerator 30.
According to the second embodiment, since the control unit 39A and the display units 46A and 46B (notification means) for notifying the end of cooling by the regenerator 30 are provided, the user knows that the storage chamber 33 cannot be maintained at a predetermined temperature. be able to.

<Embodiment 3>
Next, Embodiment 3 will be described with reference to FIGS. The third embodiment performs the cooling operation in the refrigeration unit 12 by terminating the cold storage agent operation, assuming that the thawing of the cold storage agent 30 has progressed when the predetermined time elapses during operation of the cold storage agent or the internal thermistor reaches a predetermined temperature or higher. is there. Since other configurations are the same as those of the above-described embodiment, description thereof is omitted.

The timer 58 (cool storage agent cooling operation timer) measures the time of the coolant storage operation.
As shown in FIGS. 11 and 12, when the cool storage agent cooling switch 45 is set to “ON” (the cool storage agent cooling switch is on. “Y” in S31), the controller 39A stores the cool storage. The operation mode is switched to the agent operation mode to start the cold storage agent operation, and the timer 58 starts measuring the elapsed time after the cold storage agent operation is started (S32).

Next, the control unit 39A determines that the time measured by the regenerator cooling operation timer 58 is equal to or greater than the predetermined time (cold regenerator cooling operation time) or the storage thermistor 50B is equal to or higher than a predetermined temperature (cold regenerator cooling operation end temperature). Is detected (“Y” in S33), the cooling operation mode is switched to the cooling operation mode (S34). Therefore, the timer 58 or the in-storage thermistor 50B serves as detection means for detecting the end of cooling by the regenerator 30.
Here, in this embodiment, the cool storage agent cooling operation time and the cool storage agent cooling operation end temperature are set in advance as the time and temperature at which it can be determined that the thawing of the cool storage agent 30 is progressing, The user can also set the cool storage agent cooling operation end temperature as appropriate.

According to the third embodiment, the timer 58 (cool storage agent cooling operation timer) or the in-storage thermistor 50B (detection means) for detecting the end of the cooling by the cold storage agent 30 is provided, and the control unit 39A has the timer 58 or the in-storage thermistor. The cool storage agent operation mode is switched to the cooling operation mode according to the detection result from 50B (detection means).
If it does in this way, when defrosting of the cool storage agent 30 advances during the cool storage agent operation and the storage chamber 33 cannot be maintained at a predetermined temperature, it is possible to automatically switch to the cooling operation.

  Further, it is possible to prevent the stored items from deteriorating due to a sudden rise in the temperature of the storage chamber 33 due to door opening and closing. Furthermore, a user's manual operation becomes unnecessary because a cool storage agent driving | operation is complete | finished automatically. In this embodiment, when it is detected that the cool storage agent cooling operation time or the cool storage agent cooling operation end temperature has been reached, it is switched to the cooling operation mode, but the cool storage agent cooling operation time and the cool storage agent cooling operation end temperature are switched. When it is detected that the temperature has reached, it may be switched to the cooling operation mode.

<Embodiment 4>
Next, Embodiment 4 will be described with reference to FIGS. The fourth embodiment is different from the above embodiment in the cooling during the cooling operation. The description of the same configuration as the above embodiment is omitted.
The temperature of the cool storage agent chamber 24 is detected by the thermistor 50A in the cool storage agent chamber, the temperature of the storage chamber 33 is detected by the thermistor 50B in the storage chamber, and the ambient temperature outside the cool storage chamber is detected by the ambient temperature thermistor 50C. Detected.
In the cooling operation in the cooling operation mode of the present embodiment, cold storage for controlling the refrigeration unit 12 and the cool storage agent chamber cooling fan 21 so as to freeze the cool storage agent 30 (the cool storage agent chamber cooling fan 21 performs high speed rotation or low speed rotation). The refrigerant freezing operation and the cold storage agent cooling operation in which the cold storage agent 30 cools at a temperature at which the cold storage agent 30 does not thaw after freezing are performed.

When the cooling operation in the cooling operation mode is started, the control unit 39A performs the cold storage agent freezing operation and starts measuring the elapsed time by the timer 58 (cool storage agent freezing operation timer) (S41). Further, according to the detection result of the thermistor 50A in the cool storage agent chamber, the refrigeration unit 12 and the cool storage chamber cooling fan 21 are controlled to keep the cool storage chamber 24 at a predetermined temperature. Further, the storage chamber cooling fan 28 is controlled to be turned on / off based on the detection result of the thermistor 50B in the storage chamber (an example of “storage chamber temperature detection means”), and the storage chamber 33 is maintained at a predetermined temperature.
Then, when it is detected by the timer 58 that a predetermined time has elapsed since the start of the cold storage agent freezing operation (“Y” in S42), the cold storage agent freezing operation is terminated and the operation is switched to the cold storage agent cold insulation operation.

  In the cool storage agent cooling operation, the set temperature of the cool storage agent chamber 24 is set to a temperature higher than the set temperature during the cool storage agent freezing operation and lower than the thawing temperature of the cool storage agent 30 (S43). Accordingly, the refrigeration unit 12 is turned on / off in response to temperature detection by the thermistor 50A in the cool storage agent chamber, and the temperature of the cool storage agent chamber 24 is kept within a predetermined temperature higher than that during the cool storage agent freezing operation. The storage chamber 33 maintains the storage chamber 33 at a predetermined temperature by turning on and off the storage chamber cooling fan 28 by temperature detection by the thermistor 50B in the storage chamber as in the cold storage agent freezing operation.

  In the fourth embodiment, in the cooling operation in the cooling operation mode, a cold storage agent freezing operation for freezing the cold storage agent 30 and a cold storage agent cooling operation for keeping the cold storage agent 30 at a temperature that does not freeze and defrost are performed. In operation, the set temperature of the cool storage agent chamber 24 is set to a temperature higher than the set temperature during the cool storage agent freezing operation and lower than the thawing temperature of the cool storage agent 30. If it does in this way, the cool storage agent room 24 at the time of a cool storage agent driving | operation will be kept at the temperature a little lower than the thawing temperature of the cool storage agent 30, and it will make the operating rate of the freezing unit 12 low, without making the cool storage agent 30 defrost. be able to. In addition, since the cold air discharged from the cold storage agent chamber 24 to the storage chamber 33 has a higher temperature than that during the freezing operation, the stored item 33 can be prevented from freezing without excessively decreasing the temperature in the storage chamber 33.

Moreover, in this embodiment, in addition to the above, the structure which controls the rotation speed of the cool storage material chamber cooling fan 21 according to ambient temperature is provided (refer FIG. 14).
Specifically, the ambient temperature thermistor 50C rotates the cool storage agent chamber cooling fan 21 at a high speed to complete the freezing of the cool storage agent 30 within the cool storage agent freezing operation time when the ambient temperature is equal to or higher than a predetermined value.

  The cooling storage of this embodiment includes a cool storage agent chamber cooling fan 21 that sends out cool air from the cooling device to the cool storage chamber 24, and an ambient temperature thermistor 50C (ambient temperature detection means) that detects the ambient temperature, and includes a control unit 39A. (Rotational speed control means) controls the rotational speed of the regenerator chamber cooling fan 21 according to the ambient temperature detected by the ambient temperature thermistor 50C.

  When the ambient temperature is high, the amount of heat entering from the outside air into the storage is large. Therefore, the clearance in the storage chamber cooling fan 28 is turned off when the storage chamber cooling fan 28 is off because the cool storage agent chamber cooling fan 21 rotates at high speed. Even if there is a lot of cool air in the cool storage agent chamber 24 flowing into the storage chamber 33, the temperature in the storage chamber 33 does not drop too much below the predetermined temperature.

  Conversely, when the ambient temperature is low, the amount of cold air flowing from the cold storage agent chamber 24 into the storage chamber 33 when the storage chamber cooling fan 28 is off is reduced by rotating the cold storage chamber cooling fan 21 at a low speed. Thus, the temperature in the storage chamber 33 can be prevented from dropping too much below a predetermined temperature. Further, when the ambient temperature is low, the amount of heat entering the storage from the outside air is small, so that the freezing of the regenerator 30 is finished within the regenerator freezing operation time even when the regenerator cooling fan 21 is rotating at a low speed. be able to.

<Embodiment 5>
Next, Embodiment 5 will be described with reference to FIGS. In the fifth embodiment, whether or not the defrosting operation is possible is determined according to the temperature detected by the defrosting thermistor 50D. Other configurations are the same as those of the above embodiment, and the description of the same configurations as the above embodiment is omitted.
In the vicinity of the defrosting heater 22, a defrosting thermistor 50 </ b> D (an example of “defrosting temperature detection means”) that detects temperature is provided.

Whether or not the detection result of the defrosting thermistor 50D is equal to or higher than a predetermined temperature at the start of the cold storage agent freezing operation (the power switch 48 and the operation switch 49 are turned on to start the cooling operation or when the cold storage agent operation ends). Is determined (S51).
The “predetermined temperature” is set in advance to be able to determine whether or not frost is attached to the cooler 16, but may be arbitrarily set by the user.
When the detection result of the defrosting thermistor 50D is equal to or higher than the predetermined temperature (“Y” in S51), since there is a high possibility that frost has not adhered to the cooler 16, the regenerator freezing operation is started (S52).
On the other hand, when the detection result of the defrosting thermistor 50D is equal to or lower than the predetermined temperature (“N” in S51), the defrosting operation is started because the possibility that frost has adhered to the cooler 16 is high (S53). When the defrosting operation is completed, the regenerator freezing operation is started (S52).

According to the present embodiment, the defrosting heater 22 and the defrosting thermistor 50D (defrosting temperature detecting means) for detecting the temperature of the defrosting heater 22 are provided, and the cooling agent 30 is frozen in the cooling operation in the cooling operation mode. When the temperature detected by the defrosting thermistor 50D is equal to or lower than the predetermined temperature, the defrosting operation is performed. A cold storage agent freezing operation is performed, and when the temperature detected by the defrosting thermistor 50D is equal to or higher than a predetermined temperature, the cold storage agent freezing operation is performed without performing the defrosting operation.
In this way, it is determined every time whether or not frost is attached to the cooler 16 before the start of the refrigerating agent freezing operation, and the defrosting operation is performed only when frost is expected to be attached to the cooler 16. By performing, the heat exchange efficiency between the cooler 16 and the air in the regenerator 30 can be improved, and the regenerator 30 can be reliably frozen every time during the regenerator freezing operation, and in a short time.

  Moreover, it becomes energy-saving by reducing the operation rate of the freezing unit 12 at the time of a cool storage agent freezing operation, or shortening operation time. Furthermore, when the storage chamber 33 is also cooled simultaneously with the freezing of the regenerator 30, the set temperature of the storage chamber 33 can be maintained, so that deterioration of stored items due to temperature rise can be suppressed. In addition, since it is possible to start the freezing agent freezing operation immediately when it is predicted that no frost has adhered to the cooler 16, it is possible to reduce power consumption as compared with the case where the defrosting operation is always performed, and the cold storage agent. The time for freezing 30 can be shortened.

<Embodiment 6>
Next, Embodiment 6 will be described with reference to FIG. In the sixth embodiment, the manual defrost button 44 (operation unit 41) is disabled during the freezing operation of the regenerator 30 and the manual defrost button 44 is enabled during the cool storage cold operation as compared to the fifth embodiment. Is. Other configurations are the same as those of the first embodiment, and the description of the same configurations as those of the first embodiment is omitted.

  The manual defrost button 44 on the operation panel is mounted on the control board of the control box 38. In the cold storage agent freezing operation, in order to prioritize the freezing of the cold storage agent 30, even if the manual defrost button 44 is pressed, the defrosting operation is not entered. In the regenerator cooling operation, when the manual defrost button 44 is pressed, the defrost operation is started.

According to this embodiment, the defrost heater 22 and the operation unit 41 that starts defrosting by a user operation are provided, and in the cooling operation in the cooling operation mode, the regenerator freezing operation and the regenerator 30 that freeze the regenerator 30 are performed. In the cold storage agent freezing operation, the operation of starting the defrosting of the operation unit 41 is invalidated, and in the cold storage agent cold storage operation, the operation of the operation unit 41 is performed. The operation to start defrosting is validated.
Thereby, the frost adhering to the cooler 16 can be removed periodically or arbitrarily during the cool storage agent cooling operation, and the heat exchange ratio between the cooler 16 and the air in the cool storage agent 30 during the cool storage agent cooling operation can be reduced. To improve.

<Embodiment 7>
Next, Embodiment 7 will be described with reference to FIGS. In the seventh embodiment, defrosting is performed when the temperature of the storage chamber 33 becomes a predetermined temperature or lower. The description of the same configuration as the above embodiment is omitted.
When the power supply switch 48 and the operation switch 49 are turned on to start the cooling operation, the control unit 39A causes the cold storage agent freezing operation to be performed, and when a predetermined time has elapsed from the start of the cold storage agent freezing operation, the control unit 39A switches to the cold storage agent cooling operation (S61). .

When the regenerator cooling operation is started, the control unit 39A starts counting of the timer 58 (defrost cycle timer) (S62), and when the predetermined time elapses from the start of the regenerator cooling operation, the timer 58 expires (S63). And “Y”), the defrost cycle timer 58 is reset simultaneously with the time-up, and starts counting again (S64). The “predetermined time” of the defrost cycle is set in advance, but the user may be able to set the time.
When the defrosting thermistor 50D is below a predetermined temperature (“Y” in S65) and the thermistor 50B in the storage chamber (an example of “storage chamber temperature detection means”) detects a storage chamber predetermined temperature (set temperature) or less. ("Y" in S66), the defrosting operation is started (S67. The control unit 39A is an example of "heater control means"). After completion of the defrosting operation, the operation returns to the cool storage agent cooling operation (S68).

In the seventh embodiment, the defrost heater 22, the timer 58 that measures the time until the defrost heater 22 is driven, and the storage chamber internal thermistor 50 </ b> B (storage chamber temperature detection means) that detects the temperature of the storage chamber 33. And a control unit 39A (heater control means) for controlling the driving of the defrost heater 22, and the control unit 39A has a time measured by the timer 58 equal to or longer than a predetermined time, and the thermistor 50B in the storage compartment. Control is performed so that the defrost heater 22 is driven when the detected temperature is equal to or lower than a predetermined set temperature.
In this way, if the measurement time of the timer 58 has passed a predetermined time, the cold storage agent chamber 24 is sufficiently cooled, and the cold air that has been cooled during the defrosting operation falls into the storage chamber 33 due to natural convection. In addition, since the temperature of the storage chamber 33 at the start of defrosting is originally kept low, the temperature rise of the storage chamber 33 during the defrosting operation is suppressed, and as a result, deterioration of stored items can be suppressed. .

<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 embodiment, the cooling operation mode and the regenerator operation mode are switched by the user's operation of the regenerator cooling switch 45, but the present invention is not limited to this, for example, regardless of the user's operation, You may make it switch cooling operation mode and cool storage agent operation mode according to some states, such as temperature and time which control part 39A detected.
(2) In the above embodiment, when the cool storage agent cooling switch 45 is operated, the control unit 39A switches between the cooling operation and the cool storage agent operation by controlling the refrigeration unit 12, the storage chamber cooling fan 28, and the like. If the cool storage agent cooling switch 45 is operated, the refrigeration unit 12, the storage room cooling fan 28, etc. are directly turned on / off (contacts such as relays for supplying power to the refrigeration unit 12, the storage room cooling fan 28, etc. are cooled with the cool storage agent). The cooling operation and the cool storage agent operation may be switched by switching the switch 45 on and off.

10: Cooling storage, 11: Machine room, 11A: Front panel, 12: Refrigeration unit, 13: Compressor, 14: Condenser, 15: Condenser fan, 16: Cooler, 17: Cooling duct, 21: Cold storage agent Room cooling fan, 22: Defrost heater, 24: Cold storage room, 25: Thermal insulation wall, 28: Storage room cooling fan (delivery means), 30: Cool storage agent, 33: Storage room, 38: Control box, 39: Control Circuit, 39A: control unit (switching unit, notification unit, heater control unit), 40: control panel, 41: operation unit, 41A: setting unit, 44: defrost button, 45: cool storage agent cooling switch (switching unit), 46: Electrical box, 46A, 46B: Display section (notification means), 46B: Display section, 48: Power switch, 49: Operation switch, 50A: Thermistor in the regenerator compartment (storage room temperature detection means), 5 B: Storage thermistor (detection means), 50C: Ambient temperature thermistor (ambient temperature detection means), 50D: Defrosting thermistor (defrost temperature detection means), 51: Interior light, 52: Drain evaporator, 53: Buzzer, 56: Door open / close sensor, 57: Storage unit, 58: Timer (detection means)

Claims (10)

A cooling storage that receives power from outside,
A cooling device for generating cold air;
A regenerator chamber in which a regenerator is stored and cool air from the cooling device is introduced;
A storage room that is provided at a different location from the cold storage agent room, and stores a storage to be cooled;
A delivery means for delivering the cool air in the cold storage agent chamber to the storage chamber;
A cooling operation mode in which a cooling operation is performed in which the cool storage agent stored in the storage room is sent out while the cool storage agent stored in the storage room is cooled by the cooling device. A cooling storage unit comprising: a switching unit that switches between a cold storage agent operation mode in which the cooling device is in a stopped state, and cool air in the cold storage agent chamber is sent to the storage chamber to cool the stored material and a cold storage agent operation is performed. The cooling storage according to claim 1, wherein switching between the cooling operation mode and the cool storage agent operation mode by the switching unit is performed by a user operation on an operation unit. A cooling-related device operating in connection with the cooling device;
The cooling storage according to claim 1 or 2, further comprising control means for controlling the cooling-related device to operate in the cold storage agent operation mode. The cooling storage as described in any one of Claim 1 thru | or 3 provided with the alerting | reporting means which alert | reports completion | finish of the cooling by the said cool storage agent. Comprising detection means for detecting the end of cooling by the cold storage agent;
The cooling storage according to any one of claims 1 to 4, wherein the switching unit switches the cold storage agent operation mode to the cooling operation mode according to a detection result from the detection unit. In the cooling operation in the cooling operation mode, a cold storage agent freezing operation for freezing the cold storage agent and a cold storage agent cooling operation for keeping the cold storage agent at a temperature that does not thaw, and in the cold storage agent cold storage operation, the cold storage agent is performed. The cooling storage according to any one of claims 1 to 5, wherein a set temperature of the chamber is set to a temperature that is higher than a set temperature during the cold storage agent freezing operation and lower than a thawing temperature of the cool storage agent. A regenerator chamber cooling fan for sending cool air from the cooling device to the regenerator chamber;
An ambient temperature detecting means for detecting the ambient temperature,
The cooling storage according to any one of claims 1 to 6, further comprising a rotation speed control means for controlling the rotation speed of the cool storage agent chamber cooling fan in accordance with the ambient temperature detected by the ambient temperature detection means. . A defrost heater and a defrost temperature detecting means for detecting the temperature of the defrost heater, and in the cooling operation in the cooling operation mode, the regenerator freezing operation for freezing the regenerator and the defroster is not defrosted. The cold storage agent that keeps cold at the temperature is operated.
When the temperature detected by the defrosting temperature detecting means is equal to or lower than a predetermined temperature, the cold storage agent freezing operation is performed after performing the defrosting operation, and when the temperature detected by the defrosting temperature detecting means is equal to or higher than the predetermined temperature, The cold storage according to any one of claims 1 to 7, wherein the cold storage agent freezing operation is performed without performing the defrosting operation. A defrost heater and an operation unit that starts defrosting by a user's operation, and in the cooling operation in the cooling operation mode, the regenerator freezing operation that freezes the regenerator and the cold storage that keeps the cold storage agent at a temperature that does not thaw. The agent is kept cold.
The operation of starting the defrosting of the operation unit is invalidated in the cold storage agent freezing operation, and the operation of starting the defrosting of the operation unit is validated in the cold storage agent cooling operation. The cooling storage according to any one of 8. A defrost heater,
A timer for measuring the time until the defrost heater is driven;
A storage room temperature detecting means for detecting the temperature of the storage room;
Heater control means for controlling the drive of the defrost heater,
The heater control means drives the defrost heater when the time measured by the timer is equal to or longer than a predetermined time and the temperature detected by the storage chamber temperature detecting means is equal to or lower than a predetermined set temperature. The cold storage according to any one of claims 1 to 9, which is controlled.

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