JPH0566081A - Controlling method for refrigerator with electronic lock - Google Patents

Abstract

PURPOSE:To prevent impairment of food in flavor by controlling the opening and closing of the door by the use of a first and a second timer circuits. CONSTITUTION:The opening and closing of the door is controlled by the use of a first timer circuit 11 and a second timer circuit 13; the first timer circuit 11 detects closure of the door for a certain period of time and is made to act by an electronic keying means 10 and the second timer circuit 13 can be set for any given period of time. For example, at night or during a holiday when the door of the refrigerator is not used for a long time, if the user has forgotten to close or lock the door, the door is locked automatically so that the food inside can be kept in a proper state. The second timer circuit 13 is designed to keep the door locked, that is, not to allow the door to be opened, until completion of the defrosting of some food or some food mellows to a desirable state. This contrivance enables food to keep its flavor or keep the flavor unimpaired.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a commercial refrigerator having a cooling / freezing means, a heating means, etc. for storing, thawing and aging foods, and more particularly to a method of controlling a refrigerator with an electronic lock for opening and closing a door. It is a thing.

[0002]

2. Description of the Related Art Although not a commercial refrigerator, for example, a magnetic lock for a rental rocker disclosed in Japanese Patent Laid-Open No. 53-15199 is well known as a conventional example with a lock. In this conventional example, a magnetic card is used for locking and unlocking, and its specific configuration is a door locking device capable of locking and unlocking the door in response to a command signal. A lock command device that locks the door by giving a lock signal after inserting a coin into the door locking device, and a memory that can enter the key code of the magnetic card to be used for unlocking at any time, The key code of the magnetic card inserted for unlocking is compared with the key code recorded in the memory, and only when they match, an unlocking command signal is given to the door locking device to unlock the door. A magnetic lock for a rental rocker having a lock command device.

[0003]

In the above-mentioned conventional example, there are a memory capable of writing a key code in a magnetic card at any time, and a device for reading the key code and comparing it with the memory to output an unlock command signal. However, there is no control means that locks with information based on the opening and closing of the door, means that is controlled by arbitrary setting of time, and control means that locks the door to maintain an appropriate state based on internal conditions. .. Therefore, in this type of electronic lock, there is a problem to be solved in controlling the door lock based on the usage situation and the internal situation.

[0004]

The first invention as a concrete means for solving the above problems is to mount an electronic lock type lock on a door opening / closing portion of a refrigerator, and the electronic lock type lock has an exciting coil and a plunger. And a second timer circuit that detects that the door has not been opened and closed for a certain period of time and that operates by electronic key means, and a second timer circuit that allows the timer time to be set arbitrarily. A second aspect of the present invention is a control method for a refrigerator with an electronic lock, in which the electronic lock type lock is attached to a door opening / closing portion of the refrigerator, and the electronic lock type lock includes an exciting coil and a plunger. When the temperature inside the refrigerator exceeds the set value by the temperature sensor that detects the temperature, the temperature control circuit driven by the temperature sensor, the temperature alarm circuit, and the timer circuit. Alternatively, there is provided a control method for a refrigerator with an electronic lock, wherein opening / closing control is performed when an abnormality occurs in the cooling means. A third invention is to attach an electronic lock type lock to a door opening / closing portion of the refrigerator, The electronic lock type lock has an exciting coil and a plunger, and a cooling timer circuit driven by a door lock signal when the temperature inside the refrigerator does not drop below a set value, and a first door lock timer circuit. By the second door lock timer circuit and the temperature adjustment circuit driven by the temperature sensor,
A method of controlling a refrigerator with an electronic lock, characterized in that opening / closing control is performed. Further, in addition to the third invention, a defrost circuit and a defrost timer circuit for issuing a defrost signal at a constant cycle are further provided, and the defrost timer circuit is a defrost circuit in which self-holding is released by the second door lock timer circuit. It is connected to a self-holding circuit and is added with a control for defrosting while the door is locked by receiving a door lock signal.

[0005]

The function of the present invention is to lock the door based on the information on the opening / closing of the door and to lock the door based on the information on the internal temperature so as to temporarily prohibit the opening / closing of the door. Not only is it useful for checking, but it also causes defrosting while the door is locked, so that the food items stored inside can be stored and maintained in a proper state.

[0006]

The invention will now be described in more detail by means of several illustrated embodiments. In the first embodiment shown in FIGS. 1 to 5, reference numeral 1 is, for example, a refrigerator body for business use, the inside of which is partitioned into a plurality of chambers based on the usage state, and each room has a door 2 respectively.
Is attached. In this case, a crosspiece member or a columnar body 3 is attached to the front side in order to partition the chamber and so that the door 2 can be closed stably, and when the number of the doors 2 is 4, the columnar body is provided as illustrated. 3 are attached in a cross or cross shape. Then, a control panel section 4 is attached to the upper part of the front side of the refrigerator main body, and by operating the control panel 4, temperature adjustment in the refrigerator can be appropriately selected.

In such a refrigerator in which the interior of the refrigerator is divided into a plurality of chambers and a plurality of doors 2 are attached, the opening and closing of the doors are controlled, and the electronic lock type lock 5 is concentrated in the corners of the four doors 2. It is attached to the crossing central part of the columnar body 3.

As shown in FIGS. 2 and 3, the lock 5 has a rectangular box shape as a whole, and a pair of projecting and retracting plungers 6 and 7 are provided therein, and four locks are provided. Door 2
On the other hand, these plungers are adapted to be locked and unlocked by being retracted with the excitation of the drive coils 8 and 9. A recess 2a is provided on the door 2 side corresponding to each plunger, and the recess 2a and the plunger face each other when the door 2 is closed.

An example of the control circuit of the lock 5 is shown in FIG. This control is performed by the person in charge when the refrigerator is not used for a long time, such as at night or on holidays, or when the door is not opened / closed for several hours, for example, 3 hours or more, that is, when the door is continuously closed for a certain time. Even if it is not locked, the door 2 will be locked automatically, and when it is thawed in an ice box, etc., the door 2 will be locked until the end of the thaw time and the ideal state can be controlled. is there.

The control circuit includes a first timer circuit 11 which is reset by the output of the electronic key means 10 based on, for example, a personal identification number, and a second timer circuit 13 which is provided with a self-holding circuit 12 capable of appropriately setting the timer time. When,
It is composed of a drive circuit 14 such as a transistor driven by these timer circuits, and a relay circuit 15 driven by turning on / off the drive circuit.
An indicator lamp 16 is connected to the timer circuit 13, and a normally open relay contact 18 which is opened and closed by a relay coil 17 is provided in the relay circuit 15, and the relay contact 18 drives the plunger of the lock 5. The coils 8 and 9 are connected. Incidentally, 19 is an opening / closing switch of the door 2, and 20 is a start switch of the second timer circuit 13.

The operation of this control circuit will be described with reference to the flow chart shown in FIG. 5. Normally, the door 2 is frequently opened and closed by taking food in and out of the refrigerator. By opening / closing the door 2, a signal based on the opening / closing, that is, a reset signal is input from the switch 19 to the first timer circuit 11, and the operation (transmission) of the timer circuit 11 is interrupted. This interruption can be set within a fixed time, for example, within 1 to 3 hours by setting the timer circuit, and when the signal for opening and closing the door is input within the set time, the operation of the timer circuit 11 is started. The operation is interrupted, and the timer operation is restarted from the time of the interruption.

Therefore, the time T for temporarily locking the door
_{If 1} is set to 3 hours, there will be 3 hours between opening the door and opening the next door, but if this is exceeded, that is, if there is no opening or closing of the door within 3 hours, the door will close. Time T is T
When> T ₁ , the output from the timer circuit 11 becomes high level H, the drive circuit 14 is turned on, the relay coil 17 is excited to turn on the relay contact 18, and the drive coils 8 and 9 are driven. Plungers 6 and 7 project and the door is locked automatically.

In order to open the locked door, when a predetermined personal identification number is input from the electronic key means 10, a reset signal is input to the timer circuit 11, the timer circuit 11 is turned off, and counting is started from the beginning. Come to do. Therefore, the output from the timer circuit 11 becomes the low level L, and the drive circuit 14 is turned off. Therefore, the excitation of the relay coil 17 is released, the relay contact 18 is opened, and the drive coils 8 and 9 are de-energized. The plungers 6 and 7 are immersed, the door is unlocked, and the door can be opened and closed.

Further, in the case of thawing or aging food, it is not preferable to open and close the door until they are completed. Therefore, in that case, the second timer circuit 13 is activated by pressing the start switch 20. For example, in order to thaw the food, the required food is stored in the refrigerator, and after the thaw time is set based on the quantity and quality of the food, when the start switch 20 is pressed, the self-holding circuit 12 is operated. A high level H is output from the second timer circuit 13, the drive circuit 14 is driven, the relay coil 17 is excited to turn on the relay contact 18, and the drive coils 8 and 9 are driven to drive the plungers 6, 7. Protrudes, and the door is automatically locked regardless of the first timer circuit 11.

When the above set defrosting time ends,
A signal of low level L is output from the second timer circuit 13, the drive circuit 14 is turned off, the excitation of the relay coil 17 is released, the relay contact 18 is opened, and the drive coils 8 and 9 are de-energized. At the same time that the doors 6 and 7 are retracted to unlock the door and the door can be opened and closed, the display lamp 16 is turned on to notify that the thawing is completed.

The electronic lock type lock 5 is also used for the temperature control of the inside temperature and the control of the refrigerating equipment function as in the second embodiment shown in FIGS. In other words, if the temperature inside the refrigerator rises above the set temperature by several degrees, for example, 7 ° C or higher (excluding defrosting), the quality of the food in the refrigerator changes and corrodes. The door is locked, the alarm lamp is turned on, and if the lock is not automatically released after a certain period of time, the alarm lamp blinks to notify that there is an abnormality in the device.

In the second embodiment, a resistor 21 and a temperature sensor 22 arranged at a predetermined position in the refrigerator are connected in series, and a temperature control circuit 23 is provided between the resistor 21 and the temperature sensor 22. A first drive circuit 24 such as a transistor is connected to the output side of the temperature control circuit 23, and the drive circuit 24 is provided with a first relay coil 25.

A temperature warning circuit 27 is connected to the temperature control circuit 23 and via a reset switch 26, and a second drive circuit 28 is provided on the output side of the temperature warning circuit 27.
Is connected to the second drive circuit 28, and a second relay coil 29 and an alarm lamp 3 in parallel with the relay coil 29.
0 and are provided. A resistor 31 and a diode 32 are connected in series with the alarm lamp 30.

A timer circuit 33 is connected to the temperature alarm circuit 27, and the output side of the timer circuit 33 is connected between the alarm lamp 30 and the resistor 31 via a blinking circuit 34.

The first relay contact 35 driven by the first relay coil 25 and the second relay contact 36 driven by the second relay coil 29 are arranged in different circuits, A cooling means 37 and a freezing means 38 are connected to the first relay contact 35, and the drive coils 8 and 9 of the lock 5 are connected to the second relay contact 36.

This temperature control will be described with reference to the flowchart of FIG. 7. When a negative resistance element such as a thermistor is used as the temperature sensor 22, the resistance decreases as the temperature inside the chamber increases, and the temperature control circuit 23 Output becomes high level H, the first drive circuit 24 is driven to excite the first relay coil 25, and the first relay contact 35 is turned on, whereby the cooling and freezing means in the refrigerator operates, Lower the temperature inside the refrigerator. This operation is a normal operation because the temperature difference rises and falls at a constant level when the temperature control circuit 23 is turned on and off based on the temperature detected by the temperature sensor 22.

However, the temperature control circuit is operated when the temperature inside the refrigerator exceeds the upper and lower limits of the temperature at a certain level in the normal state and the temperature inside the chamber becomes abnormal for some reason, that is, when the temperature exceeds the abnormal temperature T.degree. It goes without saying that the operation of the inside cooling and freezing means is performed by the output of 23, but in addition to that, the temperature alarm circuit 27 is turned on and the output becomes high level H, and the second drive circuit 28 to drive the second relay coil 29 to excite the second relay contact 36.
Is turned on, the drive coils 8 and 9 are driven, and the plunger 6,
7 is projected and the door 2 is locked. At this time, the alarm lamp 30 is pulled to a low level via the diode 32 and lights.

By the above operation, the door 2 is used to notify that the temperature inside the refrigerator is abnormal and to lower the temperature inside the refrigerator.
Is locked so that it cannot be opened and closed, and the timer circuit 33 is started to monitor its abnormal temperature over time.

If the driving of the timer circuit 33 is set to a fixed time t, for example, one hour, and the temperature inside the refrigerator falls to the predetermined temperature within that time, the output of the temperature control circuit 23 changes from the high level H to the low level. When it becomes L, the first drive circuit 24 is turned off, the operation of the cooling and refrigerating means is stopped,
At the same time, the signal is input to the temperature warning circuit 27, the output of the temperature warning circuit 27 also changes from the high level H to the low level L, the driving of the second drive circuit 28 is stopped, and the warning lamp 30 is turned off. Plunger 6, at the same time
7, the door 2 can be opened and closed, and the driving of the timer circuit 33 is stopped. Such a state means that the refrigerator has been used in a severe situation.

However, in the above situation, when the internal temperature does not drop to the predetermined temperature within the fixed time t (1 hour), that is, when the abnormal temperature continues and the fixed time elapses, the timer circuit 33 operates. The high level H is changed to the low level L, the blinking circuit 34 is activated, and the alarm lamp 30 is changed from lighting to blinking. In this case, there is often a problem with the cooling function of the refrigerator, and it is necessary to perform maintenance inspection for repair.

Even when the above alarm lamp 30 blinks,
Door 2 remains locked, but reset switch 2
By operating 6, the door can be unlocked. That is, it may be necessary to open and close the door under any circumstances, and the reset switch 26 has priority over the temperature control circuit and can unlock the door and open and close the door in any case. Then, once the operation is performed, that state, that is, the unlocked state is continued thereafter. However, it is also possible to automatically re-lock by eliminating the signal from the reset switch 26.

Further, in addition to the above-mentioned temperature control, an electronic lock type lock 5 is used to adjust the temperature inside the chamber during use and when not in use, as shown in FIGS. A third embodiment is shown in which the energy saving is performed efficiently.

In the third embodiment, a first drive circuit 40 which is driven by receiving a door lock signal issued by an appropriate means, a second drive circuit 42 which is driven by a defrost circuit 41, and a temperature sensor A third drive circuit 44 which is driven by turning on / off the temperature adjusting circuit 43 based on the temperature detection of 22. Each drive circuit has a first
Relay coil 45, second relay coil 46, and third relay coil 47.

A first relay contact 48 corresponding to the first relay coil 45, a second relay contact 49 corresponding to the second relay coil 46, and a third relay coil 4
The third relay contact 50 corresponding to No. 7 is provided in another circuit, and the first relay contact 48 has the drive coil 6 of the lock 5
7, the second relay contact is connected to the defrost heater 51, the third relay contact 50 is connected to the open contact of the second relay contact, and the relay compressor 50 is connected to the relay contact 50. Has been done. Substantially, the defrost heater 51 and the cooling compressor 52
And will be connected in parallel.

Cooling timer circuit 53 and first door lock timer circuit 54 driven by the door lock signal.
, A second door lock timer circuit 55 is connected to the first door lock timer circuit, and a release self-holding circuit 56 is connected to the cooling timer circuit 53. The release self-holding circuit 56 operates upon receiving the door lock signal and is reset by the third drive circuit 44,
In addition, it outputs to the cooling timer circuit 53.

A defrost self-holding circuit 57 is connected to the output side of the second door lock circuit 55, and is also connected between the resistor 21 and the temperature sensor 22 via a resistor 58 and a diode 59. is there. The output side of the defrost self-holding circuit is the defrost circuit 4
1 and the cooling timer circuit 53, and the defrost self-holding circuit 57 is connected to a defrost timer circuit 60 which outputs a defrost signal at a constant cycle.

The operation in the third embodiment will be described with reference to the flow chart of FIG. 9. When the refrigerator is used, the temperature inside the refrigerator is higher than the set value.
This is detected by the temperature sensor 22, the temperature adjusting circuit 43 is driven, the driving circuit 44 is turned on, the third relay contact 50 is turned on, and the cooling compressor 52 is driven to perform cooling. This is the usual cooling means.

When the internal temperature rises above the set value and the temperature continues to be high, a door lock signal is output, the drive circuit 40 is turned on, the relay contact 48 is turned on, and the excitation coils 6 and 7 are turned on. Is excited, the plunger protrudes, and the door is locked. At the same time, the cooling timer circuit 53 and the first and second door lock timer circuits 54 and 55 are activated, but since the door cannot be opened and closed due to the door lock, the temperature in the refrigerator gradually reaches the set value with time. Then, the cycle of the above operation is repeated at the set value. This temperature control is controlled by the temperature sensor 22 maintained at a set value by the temperature adjusting circuit 43. Then, when the temperature inside the refrigerator falls to the set value, the third drive circuit 44 is turned off, the release self-holding circuit 56 is reset, and the output thereof causes the cooling timer circuit 53 to be reset to continue cooling.

If the internal temperature does not drop to the set value even after the elapse of a certain time, the third drive circuit 44 continues to be in the ON state, the cooling timer circuit 53 continues its operation, and the output is low L. keep. In this case, even if the defrost timer circuit 60 outputs the defrost signal to turn on the self-holding circuit 57 and outputs the output high H signal, the cooling timer circuit 53 pulls it to low L, so that the defrost timer immediately enters the defrost. However, the cooling timer circuit 53 counts up and the defrosting operation starts (see the dotted line of the internal temperature). That is, the defrost circuit 41
And the second drive circuit operates to switch the second relay contact 49 and energize the defrost heater 51 to perform defrost. In this case, the third relay contact 5
Even if 0 is on, the circuit is turned off by the defrost operation.

When the temperature inside the refrigerator has cooled to the set value, the defrost signal is directly received to enter the defrost (refer to the solid line of the temperature inside the refrigerator), and the defrost operation is finished by the temperature return and the cooling timer circuit 53. Even if the time to enter the defrost is deviated due to the above, the operation is not affected by the output of the defrost timer.

Since the defrost self-holding circuit 57 operates and the output is high H, the temperature adjustment operation is shifted to the high temperature side and the inside temperature after the defrost recovery is higher than the normal temperature. It is possible to save the energy of cooling by keeping it in This is because the door is still locked and the temperature does not rise due to opening and closing of the door, so that the temperature can be kept high.

Next, when the second door lock timer circuit 55 is several hours before the door is unlocked, its output switches from high H to low L, and the bias of the temperature sensor 22 is pulled to low L, so that the temperature is adjusted. The operation of is shifted to the low temperature side, the temperature is kept lower than the normal temperature, and the temperature rise after the door lock is released is prepared. The self-holding of the defrost self-holding circuit 57 is released by the output of the second door lock timer circuit 55, and the defrost circuit 41 is released.
Becomes inoperative, the second drive circuit 42 is turned off,
The second relay contact 49 is turned off and the defrost heater 51 is de-energized.

Furthermore, when the first door lock timer circuit 54 is counted up and its output changes from high H to low L, the lock signal is released and the driving of the first drive circuit 40 is turned off, so that the first door lock timer circuit 54 is turned off. Since the relay contact 48 is turned off, the excitation of the excitation coils 6 and 7 is released, the plunger is retracted, and the door can be opened and closed. In this way, a series of door lock operations is completed.

In any of the embodiments, in a commercial refrigerator or the like, the frequency of use is too strict to lock the door when not in use and to properly hold the stored items, and the internal temperature does not fall to the set temperature. In this case, the door is locked to stop its use, and it is intended that the door be accompanied by the function of checking the cooling function or defrosting.

[0040]

As described above, the first invention of the method for controlling a refrigerator with an electronic lock according to the present invention is to attach an electronic lock type lock to a door opening / closing portion of the refrigerator, and the electronic lock type lock is an exciting coil. And a plunger, which controls opening and closing by a first timer circuit which detects that the door is not opened and closed for a certain period of time and which is operated by an electronic key means, and a second timer circuit which can arbitrarily set the timer time. By doing so, when you forget to close the refrigerator, that is, when you forget to lock it because you are not using it for a long time such as at night or on holidays, it automatically locks and keeps food in proper condition during that time And the second
With the timer circuit, the door is locked and the opening and closing is prohibited until the food is in a proper state of thawing or aging, so that there is an excellent effect that the flavor of the food is not impaired.

A second aspect of the invention is to install an electronic lock type lock on the opening / closing portion of the refrigerator, the electronic lock type lock has an exciting coil and a plunger, and a temperature sensor for detecting the temperature inside the refrigerator. The temperature control circuit driven by the temperature sensor, the temperature alarm circuit, and the timer circuit are configured to perform opening / closing control when the temperature inside the refrigerator exceeds a set value or when an abnormality occurs in the cooling means. As a result, it is possible to prevent the quality of food from being deteriorated due to an increase in the temperature inside the refrigerator due to severe use, and it is possible to check the cooling function.

Further, a third aspect of the invention is to install an electronic lock type lock on the door opening / closing part of the refrigerator, and the electronic lock type lock is provided with an exciting coil and a plunger, and the inside temperature is lowered when it exceeds a set value. When not, the opening / closing control is performed by the cooling timer circuit driven by the door lock signal, the first door lock timer circuit, the second door lock timer circuit, and the temperature adjustment circuit driven by the temperature sensor. By doing so, there is an excellent effect that the door can be locked until the internal temperature reaches the set value, and cooling can be performed to prevent deterioration of the quality of food. Further, in addition to the third invention, a defrost circuit and a defrost timer circuit for issuing a defrost signal at a constant cycle are further provided, and the defrost timer circuit is self-held by the second door lock timer circuit. It is connected to the defrost self-holding circuit to be released, and by adding the control that receives the door lock signal and defrosts while the door is locked, defrosting is performed during the door lock to enhance the cooling function and save energy. It has an excellent effect that it can be done.

[Brief description of drawings]

FIG. 1 is a perspective view showing an open state of an example of an industrial refrigerator to which an electronic lock type lock according to the present invention is attached.

FIG. 2 is an enlarged perspective view showing a main part of a commercial refrigerator to which an electronic lock type lock according to the present invention is attached.

FIG. 3 is an enlarged view showing a cross section of a main part of a commercial refrigerator to which an electronic lock type lock according to the present invention is attached.

FIG. 4 is a first diagram for controlling an electronic lock type lock according to the present invention.
It is a schematic circuit diagram of an Example.

FIG. 5 is a flowchart showing an operation state of the circuit diagram of the first embodiment according to the present invention.

FIG. 6 is a second diagram for controlling the electronic lock type lock according to the present invention.
It is a schematic circuit diagram of an Example.

FIG. 7 is a flow chart diagram showing an operation state of a circuit diagram of a second embodiment according to the present invention.

FIG. 8 is a third part for controlling the electronic lock type lock according to the present invention.
It is a schematic circuit diagram of an Example.

FIG. 9 is a flow chart diagram showing an operating state of the circuit diagram of the third embodiment according to the present invention.

[Explanation of symbols]

 1 Refrigerator main body for business 2 Door 2a Recess 3 Columnar body 4 Control panel 5 Electronic lock type lock 6,7 Plunger 8,9 Drive coil 10 Electronic key means 11 First timer circuit 12 Self-holding circuit 13 Second Timer circuit 14 Drive circuit 15 Relay circuit 16 Indicator lamp 17 Relay coil 18 Relay contact 19 Open / close switch 20 Start switch 21 Resistance 22 Temperature sensor 23 Temperature control circuit 24 First drive circuit 25 First relay coil 26 Reset switch 27 Temperature alarm Circuit 28 Second drive circuit 29 Second relay coil 30 Warning lamp 31 Resistance 32 Diode 33 Timer circuit 34 Flashing circuit 35 First relay contact 36 Second relay contact 37 Cooling means 38 Refrigerating means 38 40 First driving Circuit 41 Defloss Circuit 42 Second drive circuit 43 Temperature adjustment circuit 44 Third drive circuit 45 First relay coil 46 Second relay coil 47 Third relay coil 48 First relay contact 49 Second relay contact 50 Third Relay contact 51 Defrost heater 52 Cooling compressor 53 Cooling timer circuit 54 First door lock timer circuit 55 Second door lock timer circuit 56 Release self-holding circuit 57 Defrost self-holding circuit 58 Resistor 59 Diode 60 Defrost timer circuit H High level L Low level

Claims (6)

[Claims] 1. An electronic lock type lock is attached to a door opening / closing portion of a refrigerator, and the electronic lock type lock is provided with an exciting coil and a plunger to detect that the door is not opened / closed for a certain period of time and to use an electronic key means. A method for controlling a refrigerator with an electronic lock, wherein opening and closing control is performed by a first timer circuit that operates and a second timer circuit that can arbitrarily set a timer time. 2. The method of controlling a refrigerator with an electronic lock according to claim 1, wherein the second timer circuit is provided with a display unit. 3. An electronic lock type lock is attached to a door opening / closing part of the refrigerator, the electronic lock type lock includes an exciting coil and a plunger, and a temperature sensor for detecting the temperature inside the refrigerator.
The opening / closing control is performed by the temperature control circuit driven by the temperature sensor, the temperature alarm circuit, and the timer circuit when the internal temperature exceeds a preset value or when an abnormality occurs in the cooling means. Control method for refrigerator with electronic lock. 4. The method of controlling a refrigerator with an electronic lock according to claim 3, wherein the temperature alarm circuit is equipped with an alarm lamp. 5. An electronic lock type lock is attached to a door opening / closing portion of a refrigerator, and the electronic lock type lock is provided with an exciting coil and a plunger, and the door lock is provided when the temperature inside the refrigerator does not drop below a set value. The opening / closing control is performed by a cooling timer circuit driven by a signal, a first door lock timer circuit, a second door lock timer circuit, and a temperature adjusting circuit driven by a temperature sensor. Control method of refrigerator with electronic lock. 6. A defrost circuit and a defrost timer circuit for outputting a defrost signal at a constant cycle are provided, and the defrost timer circuit is connected to a defrost self-holding circuit whose self-holding is released by a second door lock timer circuit, The method of controlling a refrigerator with an electronic lock according to claim 5, wherein defrosting is performed while the door is locked by receiving the door lock signal.