JP3913436B2 - Cooling storage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooling storage which can avoid life falling in dangerous condition as far as possible even in case that a person is confined in a storage chamber. SOLUTION: A cooling storage 1 is equipped with a door 4 that a person goes in and out, and the interior of a storage chamber 5 is cooled with a cooling system. It is equipped with a confinement alarm switch 10, and a controller 12 for controlling the operation of the cooling system. This controller executes a specified warning action to outside of the storage chamber and also stops the operation of the cooling system in case that the confinement alarm switch is operated.

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cooling storage room having a door through which a person enters and exits.
[0002]
[Prior art]
Conventionally, a large cooling storage such as a prefabricated refrigerator is provided with a door for people to enter and exit, as shown in, for example, Japanese Patent Laid-Open No. Hei 8-200302. The storage of goods was being done. The storage chamber is cooled to a predetermined refrigeration or freezing temperature by a cooling device equipped with a cooler and a blower.
[0003]
[Problems to be solved by the invention]
By the way, in such a cooling storage, an operator may be confined (confinement) in the storage chamber due to icing around the door or failure of the door itself. Therefore, conventionally, as shown in the above-mentioned publication, an alarm device is attached outside the cooling storage, a switch is provided in the storage chamber, and an external alarm device operates when a confined person operates this switch. It had been.
[0004]
However, in the situation where the worker is working alone, such as at midnight, for example, there is a risk that even if such an alarm device is activated, it is not noticed by an external person. In such a case, since the person confined is exposed to a very low temperature environment such as refrigeration or freezing for a long time, there is a problem that the life falls into a dangerous state.
[0005]
The present invention has been made to solve the conventional technical problems, and provides a cooling storage room that can avoid the danger of life as much as possible even when a person is confined in the storage room. To do.
[0006]
[Means for Solving the Problems]
The cooling storage of the present invention is provided with a door through which a person enters and exits, the storage room is cooled by a cooling device, a confinement alarm switch provided in the storage chamber, and a control device that controls the operation of the cooling device This control device, when a confinement alarm switch is operated, performs a predetermined alarm operation to the outside of the storage room, stops the operation of the cooling device, and energizes the defrost heater provided in the cooling device. Features.
[0007]
According to the present invention, there is provided a confinement alarm switch provided in a storage chamber and a control device for controlling the operation of the cooling device in a cooling storage room provided with a door through which a person enters and exits and cooling the storage chamber by a cooling device. When the confinement alarm switch is operated by this control device, a predetermined alarm operation to the outside of the storage room is executed and the cooling device is stopped. When the confinement alarm switch is operated, the operation of the cooling device is stopped in addition to executing a predetermined alarm operation outside the storage room.
[0008]
As a result, even if an alarm is not noticed, the storage room can be prevented from being further cooled by a cooling device, and the life of a confined person may be at risk. Can be reduced.
[0009]
In particular, when the confinement alarm switch is operated, the defrosting heater provided in the cooling device is energized, so the defrosting heater raises the temperature in the storage room, and there is a risk that the confined person will be weakened by the low temperature. It can be minimized.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view of a cooling storage 1 according to the present invention, FIG. 2 is a cross-sectional view of a main part of a door of the cooling storage 1, and FIG. 3 is a block diagram of a control device 12 of the cooling storage 1.
[0011]
The cooling storage 1 according to the embodiment is a so-called prefabricated refrigerator, and includes a heat insulating wall 2 having heat insulating performance, an opening 3 formed on the front surface of the heat insulating wall 2, and heat insulating provided to close the opening 3 in an openable and closable manner. A storage chamber 5 is formed inside by a door 4 having performance. In addition, a cooler 6 and a cooling fan 7 for cooling the storage chamber 5 to a refrigeration or freezing temperature are attached to the top of the storage chamber 5, and these are compression units (not shown) provided outside the storage chamber 5. A well-known cooling device is configured by being connected to an outdoor unit having a condenser and a condenser. Reference numeral 32 denotes a defrost heater (electric heater) attached to the cooler 6.
[0012]
A latch main body 21 is attached to the front surface of the door 4 having heat insulation performance, and the heat insulating wall 2 constituting the opening 3 in which the door 4 can be freely opened and closed corresponds to the latch main body 21 in the closed state of the door 4. A latch receiver 26 is attached to the position. A hook 24 protruding from the latch body 21 is engaged with the heat insulating wall 2 side of the latch receiving roller 25 at the leading end of the latch receiving 26 to hold the door 4 in a closed state.
[0013]
The latch main body 21 has a mechanism portion 29 inside, and the hook 24 is projected and retracted by the operation of the handle 22 on the outside (outside of the storage chamber 5) side, and for the inside operation through the door 4 from the inside of the storage chamber 3. The hook 24 is configured to be able to appear and retract even by the operation of the pusher 23. As a result, the engagement between the hook 24 and the latch receiving roller 25 can be released from both inside and outside.
[0014]
In addition, when the inside of the latch body 21 is frozen by the cold air from the inside of the storage chamber 5 or the outside temperature condition, and the hook 24 cannot be moved in and out, there is a risk that an operator may be trapped in the storage chamber 5. For this reason, the latch receiver 26 is fixed to the heat insulating wall 2 by a release shaft 27 that penetrates the heat insulating wall 2 from the inside of the storage chamber 5. As a result, when the latch body 21 cannot be operated, the release shaft 27 is loosened from the storage chamber 5 using the emergency escape handle 28, and the latch receiver 26 is dropped from the heat insulating wall 2 to open the door 4. ing. Reference numeral 30 denotes a gasket for sealing between the periphery of the opening 3 and the door 4.
[0015]
Next, the control device 12 will be described with reference to FIG. The control device 12 is attached to the outside of the heat insulating wall 2 provided with the door 4 and is constituted by a general-purpose microcomputer MC. In the microcomputer MC, a program for operation control and a program for alarm control are written in advance.
[0016]
In addition to the microcomputer MC, the control device 12 is provided with input control means 41A to 41D, output control means 42A and 42B, and an EEPROM 43 which is a nonvolatile memory for storing various setting values. Each is wired to a predetermined port of the microcomputer MC.
[0017]
The input control means 41A to 41D include a key switch 44 (including an alarm release switch), a DIP switch 46, an AC signal circuit 47 composed of AC signals 1, 2,. The outputs of the temperature sensors 8 that detect the temperature (actually the cold discharge air temperature) are connected to each other.
[0018]
In the output control means 42B and 42A, a liquid electromagnetic valve for controlling the refrigerant supply to the cooler 6 of the cooling storage 1 or the compressor, the cooling fan 7 is driven, or the defrost heater 32 of the cooler 6 is provided. A relay circuit 51 comprising relays 1, 2,... For energizing, a buzzer 52 provided outside the cabinet serving as an alarm means (stopped when the confinement alarm output of the microcomputer MC is opened, closed), and LED. The digital display units 53 are connected to each other. Further, a confinement alarm switch 10 disposed near the door 4 in the storage room 5 is connected to the microcomputer MC via a cable 11.
[0019]
With the above configuration, the microcomputer MC of the control device 12 has the temperature sensor 8 set with the temperature control temperature (about + 5 ° C. in the case of refrigeration and about −20 ° C. in the case of refrigeration) input from the key switch 44. Comparing the temperature in the storage chamber 5 sent from the operation of the compressor or the operation of the liquid electromagnetic valve in the relay circuit 51 so that the temperature in the storage chamber 5 becomes the set value of the temperature control temperature, and The operation of the cooling fan 7 is controlled (temperature control). Further, the defrost heater 32 is energized periodically to melt and remove the frost that has grown on the cooler 6 (defrost control).
[0020]
Next, the confinement alarm operation by the microcomputer MC will be described with reference to FIG. FIG. 4 is a flowchart showing a program for the confinement alarm operation of the microcomputer MC. First, the microcomputer MC determines whether or not the confinement alarm flag is set in step S1, and if it is reset, the microcomputer MC proceeds to step S2 and determines whether or not the confinement alarm switch 10 has been pressed. If not, the process proceeds to step S4, and it is determined again whether or not the confinement alarm flag is set.
[0021]
If not set, the process proceeds to step S11, and temperature control by the cooling device and defrost control by the defrost heater 32 are executed. In step S12, the temperature of the storage chamber 5 is digitally displayed on the display unit 53, and the buzzer 52 is stopped by opening the confinement alarm output of the relay circuit 51.
[0022]
Here, even in an emergency situation in which the above-mentioned workers are confined, the release shaft 27 freezes and the emergency escape handle 28 cannot be rotated, or the release shaft 27 is loosened and the latch receiver 26 is dropped from the heat insulating wall 2. In some cases, the gasket 30 may freeze and the door 4 cannot be opened.
[0023]
In such a case, the confined worker presses the confinement alarm switch 10. When the lock alarm switch 10 is pressed, the microcomputer MC proceeds from step S2 to step S3, and sets a lock alarm flag. Next, the process proceeds from step S4 to step S5, the cooling fan 7 is stopped, the liquid electromagnetic valve is closed, or the operation of the compressor is stopped. Thereby, the cooling in the storage chamber 5 stops.
[0024]
Next, in step S6, the microcomputer MC energizes the defrost heater 32 to generate heat, heats the interior of the storage chamber 5, and digitally displays a confinement alarm on the display unit 53 in step S7. In step S8, the confinement alarm output is closed and the buzzer 52 is sounded. Thereby, the further cooling in the storage chamber 5 is stopped, and the defrosting heater 32 causes the temperature to turn upward. In addition, an alarm is displayed to the outside worker by an alarm display or a buzzer sounding to prompt rescue.
[0025]
Next, the process returns to step S1, and this time, the process proceeds to step S9. In step S9, it is determined whether the alarm release switch of the key switch 44 has been pressed. If it has not been pressed, the process proceeds to step S4 to continue the above-described confinement alarm operation. When an external worker notices an abnormality and a worker who has been confined is rescued, if the alarm release switch is pressed, the microcomputer MC proceeds from step S9 to step S10 and resets the confinement alarm flag. From step S11, the confinement alarm is stopped and the normal cooling operation is resumed.
[0026]
【The invention's effect】
As described above in detail, according to the present invention, a confinement alarm switch provided in a storage chamber and a cooling device operation are controlled in a cooling storage room provided with a door through which a person enters and exits and the storage chamber is cooled by a cooling device. When a confinement alarm switch is operated by this control device, a predetermined alarm operation to the outside of the storage room is performed and the operation of the cooling device is stopped. When a person is confined in the storage room, if the confinement alarm switch is operated, the operation of the cooling device is stopped in addition to performing a predetermined alarm operation outside the storage room.
[0027]
As a result, even if an alarm is not noticed, the storage room can be prevented from being further cooled by a cooling device, and the life of a confined person may be at risk. Can be reduced.
[0028]
In particular, when the confinement alarm switch is operated, the defrosting heater provided in the cooling device is energized, so the defrosting heater raises the temperature in the storage room, and there is a risk that the confined person will be weakened by the low temperature. It can be minimized.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a cooling storage of the present invention.
FIG. 2 is a cross-sectional view of the main part of the door of the cooling storage of the present invention.
FIG. 3 is a block diagram of a control device for a cooling storage of the present invention.
4 is a flowchart showing a microcomputer program of the control device of FIG. 3; FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cooling storage 2 Heat insulation wall 4 Door 5 Storage room 6 Cooler 7 Cooling fan 8 Temperature sensor 10 Confinement alarm switch 12 Controller 52 Buzzer 53 Display part MC Microcomputer

Claims (1)

In a cooling storage room that has a door for people to enter and exit and cools the storage room with a cooling device,
A confinement alarm switch provided in the storage chamber, and a control device for controlling the operation of the cooling device, the control device performs a predetermined alarm operation to the outside of the storage chamber when the confinement alarm switch is operated. A cooling storage, wherein the cooling storage unit is configured to stop the operation of the cooling device and energize a defrosting heater included in the cooling device .

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